/* roulang page: index */
:root{
  --brand-700:#1B4FD8;
  --brand-600:#2563EB;
  --brand-500:#3B82F6;
  --brand-100:#DCE7FF;
  --brand-50:#EEF4FF;
  --accent-500:#12B7A8;
  --accent-100:#D6F5F1;
  --cta-500:#FF7A3D;
  --cta-600:#F26522;
  --ink-900:#0E1729;
  --ink-700:#243247;
  --ink-500:#5A6B82;
  --ink-300:#93A2B8;
  --line:#E6ECF5;
  --bg:#F6F8FC;
  --surface:#FFFFFF;
  --radius-card:16px;
  --radius-panel:24px;
  --radius-btn:12px;
  --shadow-card:0 4px 20px rgba(21,45,90,.06);
  --shadow-hover:0 14px 36px rgba(21,45,90,.12);
  --shadow-nav:0 2px 16px rgba(21,45,90,.06);
  --ease:.22s ease;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"Inter",-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--ink-700);
  background:var(--surface);
  padding-bottom:88px;
}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding:0;list-style:none;}
img{max-width:100%;display:block;border-style:none;}
a{color:inherit;text-decoration:none;background-color:transparent;}
button,input,textarea,select{font-family:inherit;font-size:inherit;color:inherit;}
button{cursor:pointer;border:none;background:none;}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,summary:focus-visible{
  outline:2px solid var(--brand-600);outline-offset:2px;border-radius:6px;
}
h1{font-size:42px;line-height:1.25;font-weight:700;letter-spacing:-.01em;color:var(--ink-900);}
h2{font-size:32px;line-height:1.3;font-weight:700;letter-spacing:-.01em;color:var(--ink-900);}
h3{font-size:22px;line-height:1.4;font-weight:600;color:var(--ink-900);}
h4{font-size:18px;line-height:1.5;font-weight:600;color:var(--ink-900);}
.container{max-width:1200px;margin:0 auto;padding:0 24px;width:100%;}
.section{padding:88px 0;}
.section-alt{background:var(--bg);}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;}
.section-head p{color:var(--ink-500);font-size:15px;line-height:1.75;margin-top:10px;max-width:640px;}
.text-link{
  color:var(--brand-600);font-size:14px;font-weight:600;display:inline-flex;align-items:center;gap:6px;
  border-bottom:1px solid transparent;transition:color var(--ease),border-color var(--ease);white-space:nowrap;
}
.text-link:hover{color:var(--brand-700);border-bottom-color:var(--brand-700);}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;height:44px;padding:0 24px;
  border-radius:var(--radius-btn);font-size:15px;font-weight:600;border:1px solid transparent;
  transition:background-color var(--ease),color var(--ease),transform var(--ease),box-shadow var(--ease),border-color var(--ease);
  white-space:nowrap;line-height:1;
}
.btn:active{transform:translateY(1px);}
.btn-primary{background:var(--brand-600);color:#fff;}
.btn-primary:hover{background:var(--brand-700);}
.btn-cta{background:var(--cta-500);color:#fff;box-shadow:0 6px 16px rgba(255,122,61,.24);}
.btn-cta:hover{background:var(--cta-600);}
.btn-outline{background:transparent;color:var(--brand-600);border-color:var(--brand-600);}
.btn-outline:hover{background:var(--brand-50);}
.btn-sm{height:40px;padding:0 20px;font-size:14px;}
.btn[disabled]{opacity:.45;cursor:not-allowed;}
.badge{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;
  background:var(--accent-100);color:var(--accent-500);font-size:12px;font-weight:600;line-height:1;letter-spacing:.01em;
}
/* ============ Header ============ */
.site-header{
  position:sticky;top:0;z-index:120;background:#fff;border-bottom:1px solid var(--line);box-shadow:var(--shadow-nav);
}
.header-inner{display:flex;align-items:center;gap:28px;height:72px;}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0;max-width:260px;}
.logo-mark{width:34px;height:34px;flex-shrink:0;display:block;}
.logo-text{font-size:17px;font-weight:700;color:var(--ink-900);letter-spacing:-.01em;white-space:nowrap;}
.nav-search{
  position:relative;display:flex;align-items:center;flex:1 1 auto;max-width:480px;height:44px;
  border:1px solid var(--line);border-radius:999px;background:var(--bg);
  transition:border-color var(--ease),box-shadow var(--ease),background-color var(--ease);
}
.nav-search:focus-within{border-color:var(--brand-600);box-shadow:0 0 0 3px rgba(37,99,235,.12);background:#fff;}
.nav-search svg{width:18px;height:18px;flex-shrink:0;margin-left:16px;stroke:var(--ink-300);fill:none;stroke-width:1.75;transition:stroke var(--ease);}
.nav-search:focus-within svg{stroke:var(--brand-600);}
.nav-search input{
  flex:1;height:100%;border:none;background:transparent;outline:none;
  padding:0 12px;font-size:14px;color:var(--ink-900);
}
.nav-search input::placeholder{color:var(--ink-300);font-size:14px;}
.nav-search button[type="submit"]{
  height:32px;padding:0 16px;margin-right:6px;border-radius:999px;background:var(--brand-600);color:#fff;
  font-size:13px;font-weight:600;transition:background-color var(--ease);
}
.nav-search button[type="submit"]:hover{background:var(--brand-700);}
.nav-links{display:flex;align-items:center;gap:24px;margin-left:auto;}
.nav-link{
  position:relative;font-size:14px;color:var(--ink-700);padding:6px 0;transition:color var(--ease);
  white-space:nowrap;border-bottom:2px solid transparent;
}
.nav-link:hover{color:var(--brand-600);border-bottom-color:var(--brand-600);}
.nav-link.active{color:var(--brand-600);border-bottom-color:var(--brand-600);font-weight:600;}
.nav-cta{flex-shrink:0;height:40px;padding:0 20px;font-size:14px;}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--line);
  align-items:center;justify-content:center;flex-direction:column;gap:4px;background:#fff;
  transition:background-color var(--ease),border-color var(--ease);flex-shrink:0;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink-700);border-radius:2px;}
.nav-toggle:hover{background:var(--brand-50);border-color:var(--brand-100);}
.mobile-search-bar{display:none;padding:0 0 12px;}
.mobile-search-bar .nav-search{max-width:100%;height:42px;background:#fff;}
.mobile-drawer{
  border-top:1px solid var(--line);background:#fff;padding:16px 0 24px;
  box-shadow:var(--shadow-card);
}
.drawer-search{display:flex;align-items:center;height:44px;border:1px solid var(--line);border-radius:999px;background:var(--bg);margin-bottom:16px;}
.drawer-search input{flex:1;height:100%;border:none;background:transparent;outline:none;padding:0 16px;font-size:14px;}
.drawer-search input::placeholder{color:var(--ink-300);}
.drawer-search button{height:32px;padding:0 16px;margin-right:6px;border-radius:999px;background:var(--brand-600);color:#fff;font-size:13px;font-weight:600;}
.drawer-nav{display:flex;flex-direction:column;}
.drawer-link{
  display:flex;align-items:center;justify-content:space-between;min-height:48px;
  font-size:15px;color:var(--ink-700);border-bottom:1px solid var(--line);transition:color var(--ease);
}
.drawer-link:hover{color:var(--brand-600);}
.drawer-link.active{color:var(--brand-600);font-weight:600;}
.drawer-link .arrow{color:var(--ink-300);font-size:18px;line-height:1;}
.drawer-cta{width:100%;margin-top:20px;}
/* ============ Hero ============ */
.hero{padding:64px 0 88px;background:linear-gradient(180deg,#F6F9FF 0%,#FFFFFF 78%);}
.hero-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;height:30px;padding:0 14px;border-radius:999px;
  background:var(--brand-50);color:var(--brand-700);font-size:13px;font-weight:600;margin-bottom:22px;
}
.hero-badge i{width:6px;height:6px;border-radius:50%;background:var(--accent-500);display:block;}
.hero h1{margin-bottom:20px;}
.hero-sub{font-size:16px;line-height:1.85;color:var(--ink-500);margin-bottom:32px;max-width:560px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:16px;margin-bottom:36px;}
.trust-bar{display:flex;flex-wrap:wrap;align-items:center;gap:0;}
.trust-bar li{
  display:flex;align-items:center;gap:8px;font-size:13px;color:var(--ink-500);line-height:1.6;
  padding:0 18px;border-left:1px solid var(--line);
}
.trust-bar li:first-child{padding-left:0;border-left:none;}
.trust-bar svg{width:16px;height:16px;stroke:var(--accent-500);fill:none;stroke-width:1.8;flex-shrink:0;}
.hero-visual{border-radius:var(--radius-panel);overflow:hidden;box-shadow:var(--shadow-hover);background:var(--brand-50);}
.hero-visual img{width:100%;aspect-ratio:16/10;object-fit:cover;}
/* ============ Merits ============ */
.merits-grid{display:grid;grid-template-columns:2fr 1fr;gap:24px;align-items:start;}
.merit-card{
  background:var(--surface);border-radius:var(--radius-card);box-shadow:var(--shadow-card);
  border:1px solid var(--line);overflow:hidden;
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.merit-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:var(--brand-100);}
.merit-main{display:flex;flex-direction:column;grid-row:span 2;height:100%;}
.merit-main figure{margin:0;aspect-ratio:16/9;overflow:hidden;}
.merit-main figure img{width:100%;height:100%;object-fit:cover;}
.merit-body{padding:32px;}
.merit-body h3{margin-bottom:14px;}
.merit-body p{font-size:15px;line-height:1.78;color:var(--ink-500);margin-bottom:18px;}
.merit-side{display:flex;flex-direction:column;gap:24px;}
.merit-side .merit-card:nth-child(2){margin-left:18px;}
.merit-side .merit-body{padding:26px;}
.merit-side .merit-body h3{font-size:20px;}
.merit-side .merit-body p{font-size:15px;line-height:1.75;margin-bottom:14px;}
.icon-sq{
  width:44px;height:44px;border-radius:12px;background:var(--accent-100);
  display:flex;align-items:center;justify-content:center;margin-bottom:18px;
}
.icon-sq svg{width:24px;height:24px;stroke:var(--accent-500);fill:none;stroke-width:1.75;stroke-linecap:round;stroke-linejoin:round;}
/* ============ Flow ============ */
.flow-panel{
  background:var(--bg);border-radius:var(--radius-panel);padding:64px;
  display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;border:1px solid var(--line);
}
.flow-steps{display:flex;flex-direction:column;}
.flow-step{display:flex;gap:18px;padding-bottom:26px;position:relative;}
.flow-step:last-child{padding-bottom:0;}
.flow-step:not(:last-child)::before{
  content:"";position:absolute;left:15px;top:34px;bottom:6px;border-left:1px dashed var(--brand-100);
}
.step-num{
  width:32px;height:32px;border-radius:50%;background:var(--accent-100);color:var(--accent-500);
  display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:700;flex-shrink:0;z-index:1;
}
.step-text h4{font-size:17px;margin-bottom:6px;}
.step-text p{font-size:14px;line-height:1.7;color:var(--ink-500);}
.flow-visual{border-radius:var(--radius-card);overflow:hidden;box-shadow:var(--shadow-card);}
.flow-visual img{width:100%;aspect-ratio:4/3;object-fit:cover;}
/* ============ Proof ============ */
.stat-bar{
  display:grid;grid-template-columns:repeat(4,1fr);gap:24px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);padding:32px;margin-bottom:56px;
}
.stat-item{text-align:center;border-left:1px solid var(--line);padding:0 12px;}
.stat-item:first-child{border-left:none;}
.stat-num{font-size:32px;font-weight:700;color:var(--brand-600);line-height:1.2;letter-spacing:-.01em;}
.stat-num small{font-size:16px;font-weight:600;margin-left:2px;}
.stat-label{font-size:13px;color:var(--ink-500);margin-top:8px;line-height:1.6;}
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:start;}
.review-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);padding:32px;transition:transform var(--ease),box-shadow var(--ease);
}
.review-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);}
.review-card:nth-child(2){margin-top:24px;}
.review-quote{font-size:34px;line-height:1;color:var(--brand-100);font-weight:700;margin-bottom:14px;font-family:Georgia,serif;}
.review-card p{font-size:15px;line-height:1.8;color:var(--ink-700);margin-bottom:24px;}
.review-user{display:flex;align-items:center;gap:12px;}
.avatar{
  width:40px;height:40px;border-radius:50%;flex-shrink:0;
  background:linear-gradient(135deg,var(--brand-500),var(--accent-500));
  display:flex;align-items:center;justify-content:center;color:#fff;font-size:14px;font-weight:600;
}
.review-name{font-size:14px;font-weight:600;color:var(--ink-900);line-height:1.4;}
.review-role{font-size:13px;color:var(--ink-300);line-height:1.5;}
/* ============ Posts ============ */
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.post-card{
  display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-card);overflow:hidden;box-shadow:var(--shadow-card);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.post-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:var(--brand-100);}
.post-thumb{aspect-ratio:16/9;overflow:hidden;background:var(--brand-50);}
.post-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease;}
.post-card:hover .post-thumb img{transform:scale(1.04);}
.post-body{padding:24px;display:flex;flex-direction:column;flex:1;}
.post-body .badge{align-self:flex-start;margin-bottom:14px;}
.post-title{
  font-size:18px;line-height:1.5;font-weight:600;color:var(--ink-900);margin-bottom:12px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  transition:color var(--ease);
}
.post-card:hover .post-title{color:var(--brand-600);}
.post-excerpt{
  font-size:14px;line-height:1.7;color:var(--ink-500);margin-bottom:20px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post-meta{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  margin-top:auto;padding-top:16px;border-top:1px solid var(--line);
  font-size:13px;color:var(--ink-300);
}
.post-more{color:var(--brand-600);font-weight:600;display:inline-flex;align-items:center;gap:4px;}
.empty-state{
  grid-column:1/-1;display:flex;flex-direction:column;align-items:center;justify-content:center;
  text-align:center;padding:64px 24px;border:1px dashed var(--line);border-radius:var(--radius-card);
  background:var(--surface);
}
.empty-state svg{width:44px;height:44px;stroke:var(--ink-300);fill:none;stroke-width:1.6;margin-bottom:18px;}
.empty-state p{font-size:15px;color:var(--ink-500);margin-bottom:12px;}
/* ============ FAQ ============ */
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:24px 0 24px 0;font-size:16px;font-weight:600;color:var(--ink-900);
  transition:color var(--ease),padding-left var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:var(--brand-600);}
.faq-icon{
  position:relative;width:22px;height:22px;flex-shrink:0;
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--accent-500);border-radius:2px;transition:transform var(--ease),opacity var(--ease);
}
.faq-icon::before{left:0;top:10px;width:22px;height:2px;}
.faq-icon::after{left:10px;top:0;width:2px;height:22px;}
.faq-item[open] .faq-icon::after{transform:rotate(90deg);opacity:0;}
.faq-item[open] summary{padding-left:16px;color:var(--brand-600);}
.faq-answer{padding:0 0 26px 16px;border-left:3px solid var(--brand-600);margin-left:0;}
.faq-answer p{font-size:15px;line-height:1.85;color:var(--ink-500);padding-left:16px;}
/* ============ Final CTA ============ */
.final-cta{
  background:var(--brand-50);border-radius:var(--radius-panel);padding:64px 40px;text-align:center;
  border:1px solid var(--brand-100);
}
.final-cta h2{margin-bottom:16px;}
.final-cta p{font-size:16px;line-height:1.8;color:var(--ink-500);max-width:640px;margin:0 auto 32px;}
.final-actions{display:flex;flex-wrap:wrap;gap:16px;justify-content:center;}
/* ============ Sticky bar ============ */
.sticky-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:110;background:#fff;
  border-top:1px solid var(--line);box-shadow:0 -2px 16px rgba(21,45,90,.06);
  padding-bottom:env(safe-area-inset-bottom);
}
.sticky-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:64px;}
.sticky-text{font-size:14px;color:var(--ink-700);}
.sticky-text strong{color:var(--ink-900);font-weight:600;}
.sticky-actions{display:flex;align-items:center;gap:12px;}
.sticky-actions .btn{height:40px;padding:0 20px;font-size:14px;}
/* ============ Footer ============ */
.site-footer{background:#F1F5FB;border-top:1px solid var(--line);margin-top:0;}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1.4fr;gap:48px;padding:64px 0 40px;
}
.footer-brand p{font-size:14px;line-height:1.8;color:var(--ink-500);margin-top:18px;max-width:320px;}
.footer-col h4{font-size:15px;margin-bottom:18px;}
.footer-col ul li{margin-bottom:12px;}
.footer-col ul a{font-size:14px;color:var(--ink-500);transition:color var(--ease);border-bottom:1px solid transparent;}
.footer-col ul a:hover{color:var(--brand-600);border-bottom-color:var(--brand-600);}
.footer-form{display:flex;flex-direction:column;gap:10px;max-width:420px;}
.footer-form label{font-size:14px;font-weight:600;color:var(--ink-700);}
.footer-form input,.footer-form textarea{
  width:100%;border:1px solid var(--line);border-radius:12px;background:#fff;
  font-size:14px;color:var(--ink-900);padding:11px 14px;outline:none;
  transition:border-color var(--ease),box-shadow var(--ease);resize:vertical;
}
.footer-form input{height:44px;}
.footer-form input::placeholder,.footer-form textarea::placeholder{color:var(--ink-300);}
.footer-form input:focus,.footer-form textarea:focus{border-color:var(--brand-600);box-shadow:0 0 0 3px rgba(37,99,235,.12);}
.footer-form .btn{align-self:flex-start;margin-top:6px;}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;
  border-top:1px solid var(--line);padding:24px 0 32px;font-size:13px;color:var(--ink-500);
}
.back-top{font-size:13px;color:var(--ink-500);transition:color var(--ease);}
.back-top:hover{color:var(--brand-600);}
/* ============ Responsive ============ */
@media (max-width:1200px){
  .container{padding:0 24px;}
  .hero-grid{gap:40px;}
}
@media (max-width:1024px){
  .nav-links{display:none;}
  .nav-cta{display:none;}
  .nav-toggle{display:flex;margin-left:auto;}
  .nav-search{max-width:100%;}
  .merits-grid{grid-template-columns:1fr;}
  .merit-main{grid-row:auto;}
  .merit-side{flex-direction:row;}
  .merit-side .merit-card{flex:1;}
  .merit-side .merit-card:nth-child(2){margin-left:0;margin-top:24px;}
  .flow-panel{padding:48px;gap:40px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:40px;}
  .review-grid{grid-template-columns:1fr 1fr;}
  .review-card:nth-child(3){display:none;}
}
@media (max-width:768px){
  body{padding-bottom:76px;}
  .container{padding:0 20px;}
  .section{padding:56px 0;}
  .header-inner{height:60px;gap:16px;}
  .logo-text{font-size:15px;}
  .nav-search{display:none;}
  .mobile-search-bar{display:block;}
  .hero{padding:40px 0 56px;}
  .hero-grid{grid-template-columns:1fr;gap:32px;}
  .hero-visual{order:-1;}
  h1{font-size:30px;}
  h2{font-size:24px;}
  .hero-sub{font-size:15px;margin-bottom:26px;}
  .hero-actions .btn{flex:1 1 auto;}
  .trust-bar li{padding:0 12px;}
  .trust-bar{row-gap:12px;}
  .trust-bar li:nth-child(3){padding-left:0;border-left:none;}
  .merits-grid{gap:16px;}
  .merit-side{flex-direction:column;}
  .merit-side .merit-card:nth-child(2){margin-top:0;}
  .merit-body{padding:24px;}
  .flow-panel{grid-template-columns:1fr;padding:32px 24px;gap:32px;}
  .flow-visual{order:-1;}
  .stat-bar{grid-template-columns:1fr 1fr;gap:20px;padding:24px;}
  .stat-item:nth-child(3){border-left:none;}
  .stat-num{font-size:26px;}
  .review-grid{grid-template-columns:1fr;}
  .review-card:nth-child(2){margin-top:0;}
  .review-card:nth-child(3){display:block;}
  .post-grid{grid-template-columns:1fr;gap:20px;}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:28px;}
  .final-cta{padding:40px 24px;}
  .final-actions .btn{flex:1 1 auto;}
  .sticky-inner{height:56px;gap:12px;}
  .sticky-text{display:none;}
  .sticky-actions{width:100%;gap:10px;}
  .sticky-actions .btn{flex:1;height:40px;padding:0 12px;font-size:14px;}
  .footer-grid{grid-template-columns:1fr;gap:0;padding:32px 0 16px;}
  .footer-col{border-bottom:1px solid var(--line);}
  .footer-col summary{
    list-style:none;cursor:pointer;font-size:15px;font-weight:600;color:var(--ink-900);
    padding:18px 0;display:flex;align-items:center;justify-content:space-between;
  }
  .footer-col summary::-webkit-details-marker{display:none;}
  .footer-col summary::after{content:"+";color:var(--ink-300);font-size:18px;line-height:1;}
  .footer-col[open] summary::after{content:"−";}
  .footer-col .footer-inner{padding-bottom:18px;}
  .footer-brand{border-bottom:1px solid var(--line);padding-bottom:20px;}
  .footer-form{max-width:100%;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:10px;padding:20px 0 28px;}
}
@media (max-width:480px){
  h1{font-size:26px;}
  h2{font-size:22px;}
  h3{font-size:19px;}
  .hero-actions{flex-direction:column;}
  .hero-actions .btn{width:100%;}
  .stat-bar{grid-template-columns:1fr;gap:16px;}
  .stat-item{border-left:none;border-top:1px solid var(--line);padding-top:16px;}
  .stat-item:first-child{border-top:none;padding-top:0;}
  .trust-bar{flex-direction:column;align-items:flex-start;gap:10px;}
  .trust-bar li{padding:0;border-left:none;}
  .post-body{padding:20px;}
}

/* roulang page: article */
:root{
  --brand-700:#1B4FD8;
  --brand-600:#2563EB;
  --brand-500:#3B82F6;
  --brand-100:#DCE7FF;
  --brand-50:#EEF4FF;
  --accent-500:#12B7A8;
  --accent-100:#D6F5F1;
  --cta-500:#FF7A3D;
  --cta-600:#F26522;
  --ink-900:#0E1729;
  --ink-700:#243247;
  --ink-500:#5A6B82;
  --ink-300:#93A2B8;
  --line:#E6ECF5;
  --bg:#F6F8FC;
  --surface:#FFFFFF;
  --radius-card:16px;
  --radius-panel:24px;
  --radius-btn:12px;
  --radius-pill:999px;
  --shadow-card:0 4px 20px rgba(21,45,90,.06);
  --shadow-hover:0 14px 36px rgba(21,45,90,.12);
  --shadow-nav:0 2px 16px rgba(21,45,90,.06);
  --container:1200px;
  --t:.22s ease;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--surface);
  color:var(--ink-700);
  font-family:Inter,-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.8;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none;}
a{color:inherit;text-decoration:none;}
button,input,textarea,select{font:inherit;color:inherit;}
button{cursor:pointer;background:none;border:0;}
ul,ol{margin:0;padding:0;}
h1,h2,h3,h4,p{margin:0;}
:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;border-radius:6px;}

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

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:44px;
  padding:0 22px;
  border-radius:var(--radius-btn);
  font-size:15px;
  font-weight:600;
  border:1px solid transparent;
  transition:background-color var(--t),color var(--t),border-color var(--t),box-shadow var(--t),transform var(--t);
  white-space:nowrap;
}
.btn-primary{background:var(--brand-600);color:#fff;}
.btn-primary:hover{background:var(--brand-700);}
.btn-primary:active{transform:translateY(1px);}
.btn-cta{background:var(--cta-500);color:#fff;box-shadow:0 6px 18px rgba(255,122,61,.24);}
.btn-cta:hover{background:var(--cta-600);}
.btn-cta:active{transform:translateY(1px);}
.btn-outline{background:#fff;color:var(--brand-600);border-color:var(--brand-500);}
.btn-outline:hover{background:var(--brand-50);}
.btn-text{padding:0;height:auto;color:var(--brand-600);font-weight:600;}
.btn-text:hover{text-decoration:underline;text-underline-offset:5px;}
.btn-sm{height:40px;padding:0 18px;font-size:14px;}
.btn-block{width:100%;}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;}
.btn[disabled]:hover,.btn.is-disabled:hover{background:var(--brand-600);transform:none;}

.text-link{color:var(--brand-600);font-size:14px;font-weight:600;}
.text-link:hover{color:var(--brand-700);text-decoration:underline;text-underline-offset:5px;}

.badge{
  display:inline-flex;
  align-items:center;
  height:26px;
  padding:0 12px;
  border-radius:var(--radius-pill);
  background:var(--accent-100);
  color:#0B8A7F;
  font-size:12px;
  font-weight:600;
  letter-spacing:.02em;
}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:#fff;
  border-bottom:1px solid var(--line);
  transition:box-shadow var(--t);
}
.site-header.is-scrolled{box-shadow:var(--shadow-nav);}
.header-inner{
  display:flex;
  align-items:center;
  gap:24px;
  min-height:72px;
}
.logo{
  display:flex;
  align-items:center;
  gap:10px;
  max-width:260px;
  flex:0 0 auto;
}
.logo-mark{display:inline-flex;}
.logo-text{
  font-size:16px;
  font-weight:700;
  color:var(--ink-900);
  line-height:1.3;
  letter-spacing:-.01em;
}
.nav-search{
  position:relative;
  display:flex;
  align-items:center;
  flex:1 1 auto;
  max-width:520px;
  height:44px;
  padding:0 6px 0 44px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-pill);
  transition:border-color var(--t),box-shadow var(--t);
}
.nav-search:focus-within{border-color:var(--brand-600);box-shadow:0 0 0 3px rgba(37,99,235,.12);}
.search-icon{
  position:absolute;
  left:16px;
  top:50%;
  transform:translateY(-50%);
  color:var(--ink-300);
  transition:color var(--t);
}
.nav-search:focus-within .search-icon{color:var(--brand-600);}
.nav-search input{
  flex:1;
  min-width:0;
  height:100%;
  border:0;
  outline:none;
  background:transparent;
  font-size:14px;
  color:var(--ink-900);
}
.nav-search input::placeholder{color:var(--ink-300);font-size:14px;}
.search-btn{
  height:32px;
  padding:0 16px;
  border-radius:var(--radius-pill);
  background:var(--brand-600);
  color:#fff;
  font-size:13px;
  font-weight:600;
  transition:background-color var(--t);
}
.search-btn:hover{background:var(--brand-700);}
.nav-links{display:flex;align-items:center;gap:22px;margin-left:auto;}
.nav-link{
  position:relative;
  padding:6px 0;
  font-size:14px;
  color:var(--ink-700);
  transition:color var(--t);
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:-2px;
  height:2px;
  border-radius:2px;
  background:transparent;
  transition:background-color var(--t);
}
.nav-link:hover{color:var(--brand-600);}
.nav-link:hover::after{background:var(--brand-100);}
.nav-link.active{color:var(--brand-600);font-weight:600;}
.nav-link.active::after{background:var(--brand-600);}
.nav-cta{flex:0 0 auto;}
.menu-toggle{
  display:none;
  width:44px;
  height:44px;
  align-items:center;
  justify-content:center;
  border:1px solid var(--line);
  border-radius:var(--radius-btn);
  color:var(--ink-700);
  transition:border-color var(--t),color var(--t),background-color var(--t);
}
.menu-toggle:hover{border-color:var(--brand-500);color:var(--brand-600);background:var(--brand-50);}
.nav-drawer{
  display:none;
  padding:8px 24px 20px;
  border-top:1px solid var(--line);
  background:#fff;
}
.nav-drawer.is-open{display:block;}
.drawer-links{display:flex;flex-direction:column;}
.drawer-link{
  display:flex;
  align-items:center;
  justify-content:space-between;
  min-height:48px;
  font-size:15px;
  color:var(--ink-700);
  border-bottom:1px solid var(--line);
  transition:color var(--t);
}
.drawer-link:hover{color:var(--brand-600);}
.drawer-link.active{color:var(--brand-600);font-weight:600;}
.drawer-cta{margin-top:18px;}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:8px;
  min-height:44px;
  padding:16px 0 4px;
  font-size:14px;
  color:var(--ink-500);
}
.breadcrumb a{color:var(--ink-500);transition:color var(--t);}
.breadcrumb a:hover{color:var(--brand-600);}
.breadcrumb .sep{color:var(--ink-300);}
.breadcrumb .current{color:var(--ink-900);font-weight:600;}

/* ---------- 文章头部 ---------- */
.post-head{padding:12px 0 28px;max-width:820px;}
.post-head h1{
  margin-top:14px;
  font-size:34px;
  line-height:1.32;
  font-weight:700;
  color:var(--ink-900);
  letter-spacing:-.01em;
}
.post-meta{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:10px;
  margin-top:18px;
  font-size:13px;
  color:var(--ink-500);
}
.post-meta .dot{width:3px;height:3px;border-radius:50%;background:var(--ink-300);}

/* ---------- 正文布局 ---------- */
.post-layout{
  display:grid;
  grid-template-columns:minmax(0,1fr) 320px;
  gap:48px;
  align-items:start;
  padding-bottom:24px;
}
.article-content{
  max-width:760px;
  font-size:16px;
  line-height:1.85;
  color:var(--ink-700);
  overflow-wrap:break-word;
}
.article-content > *:first-child{margin-top:0;}
.article-content p{margin:0 0 20px;}
.article-content h2{
  position:relative;
  margin:40px 0 16px;
  padding-left:16px;
  font-size:26px;
  line-height:1.4;
  font-weight:700;
  color:var(--ink-900);
  letter-spacing:-.01em;
}
.article-content h2::before{
  content:"";
  position:absolute;
  left:0;
  top:7px;
  bottom:7px;
  width:4px;
  border-radius:2px;
  background:var(--brand-600);
}
.article-content h3{
  margin:28px 0 12px;
  font-size:20px;
  line-height:1.5;
  font-weight:600;
  color:var(--ink-900);
}
.article-content h4{
  margin:22px 0 10px;
  font-size:17px;
  font-weight:600;
  color:var(--ink-900);
}
.article-content ul{list-style:none;margin:0 0 20px;padding:0;}
.article-content ul > li{position:relative;padding-left:22px;margin-bottom:10px;}
.article-content ul > li::before{
  content:"";
  position:absolute;
  left:2px;
  top:11px;
  width:7px;
  height:7px;
  border-radius:2px;
  background:var(--accent-500);
}
.article-content ol{margin:0 0 20px;padding-left:24px;}
.article-content ol > li{margin-bottom:10px;}
.article-content ol > li::marker{color:var(--brand-600);font-weight:600;}
.article-content blockquote{
  margin:24px 0;
  padding:16px 22px;
  background:#F2FBF9;
  border-left:3px solid var(--accent-500);
  border-radius:0 12px 12px 0;
  color:var(--ink-700);
}
.article-content blockquote p:last-child{margin-bottom:0;}
.article-content a{
  color:var(--brand-600);
  text-decoration:underline;
  text-underline-offset:3px;
  text-decoration-thickness:1px;
}
.article-content a:hover{color:var(--brand-700);}
.article-content img{
  max-width:100%;
  height:auto;
  margin:24px auto;
  border-radius:12px;
  border:1px solid var(--line);
}
.article-content figure{margin:24px 0;}
.article-content figcaption{
  margin-top:10px;
  text-align:center;
  font-size:13px;
  color:var(--ink-300);
}
.article-content hr{
  border:0;
  border-top:1px solid var(--line);
  margin:36px 0;
}
.article-content code{
  padding:2px 6px;
  background:var(--brand-50);
  border-radius:6px;
  font-size:14px;
  color:var(--brand-700);
}
.article-content pre{
  margin:24px 0;
  padding:18px 20px;
  overflow-x:auto;
  background:#0E1729;
  color:#E6ECF5;
  border-radius:12px;
  font-size:14px;
  line-height:1.7;
}
.article-content pre code{background:none;color:inherit;padding:0;}
.article-content table{
  width:100%;
  margin:24px 0;
  border:1px solid var(--line);
  border-radius:12px;
  border-collapse:separate;
  border-spacing:0;
  overflow:hidden;
  font-size:15px;
  line-height:1.7;
}
.article-content thead th{
  background:var(--brand-50);
  color:var(--ink-900);
  font-weight:600;
  text-align:left;
  padding:12px 16px;
  border-bottom:1px solid var(--line);
}
.article-content tbody td{
  padding:12px 16px;
  border-bottom:1px solid var(--line);
  color:var(--ink-700);
}
.article-content tbody tr:last-child td{border-bottom:0;}

.back-link{
  display:inline-flex;
  align-items:center;
  gap:6px;
  margin-top:32px;
  font-size:14px;
  color:var(--ink-500);
  transition:color var(--t);
}
.back-link:hover{color:var(--brand-600);}

.empty-state{
  padding:56px 24px;
  text-align:center;
  background:var(--bg);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
}
.empty-state h2{
  padding-left:0;
  font-size:20px;
  margin:0 0 8px;
}
.empty-state h2::before{display:none;}
.empty-state p{color:var(--ink-500);font-size:15px;margin-bottom:18px;}

/* ---------- 侧栏 ---------- */
.post-aside{
  position:sticky;
  top:96px;
  display:flex;
  flex-direction:column;
  gap:20px;
}
.info-card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);
  padding:22px;
}
.info-card h4{
  font-size:15px;
  font-weight:600;
  color:var(--ink-900);
  margin-bottom:14px;
}
.info-row{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:10px 0;
  border-bottom:1px dashed var(--line);
  font-size:14px;
}
.info-row:last-of-type{border-bottom:0;}
.info-row span:first-child{color:var(--ink-500);}
.info-row span:last-child{color:var(--ink-900);font-weight:600;}
.info-card .btn{margin-top:16px;}
.aside-links{list-style:none;margin:0;}
.aside-links li{margin-bottom:12px;}
.aside-links li:last-child{margin-bottom:0;}
.aside-links a{
  display:flex;
  align-items:flex-start;
  gap:8px;
  font-size:14px;
  color:var(--ink-700);
  line-height:1.7;
  transition:color var(--t);
}
.aside-links a::before{
  content:"";
  flex:0 0 auto;
  width:6px;
  height:6px;
  margin-top:9px;
  border-radius:2px;
  background:var(--accent-500);
}
.aside-links a:hover{color:var(--brand-600);}

/* ---------- 相关推荐 ---------- */
.related{padding:56px 0 8px;border-top:1px solid var(--line);margin-top:48px;}
.related-head{
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  gap:16px;
  margin-bottom:24px;
}
.related-head h2{font-size:24px;color:var(--ink-900);letter-spacing:-.01em;}
.related-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;
}
.related-card{
  display:flex;
  gap:14px;
  padding:14px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);
  transition:transform var(--t),box-shadow var(--t);
}
.related-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);}
.related-card img{
  width:120px;
  height:80px;
  flex:0 0 auto;
  object-fit:cover;
  border-radius:12px;
}
.related-card h3{
  font-size:15px;
  font-weight:600;
  color:var(--ink-900);
  line-height:1.5;
  margin-bottom:6px;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.related-card time{font-size:13px;color:var(--ink-300);}

/* ---------- CTA 面板 ---------- */
.cta-panel{
  margin:56px 0 64px;
  padding:48px 32px;
  background:var(--brand-50);
  border-radius:var(--radius-panel);
  text-align:center;
}
.cta-panel h2{font-size:28px;color:var(--ink-900);line-height:1.35;letter-spacing:-.01em;}
.cta-panel p{margin:12px auto 24px;max-width:620px;font-size:15px;color:var(--ink-500);}
.cta-actions{display:flex;justify-content:center;flex-wrap:wrap;gap:14px;}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:40px;
  background:#F1F5FB;
  border-top:1px solid var(--line);
  padding-top:64px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.5fr;
  gap:40px;
}
.footer-brand .logo{margin-bottom:16px;}
.footer-brand p{font-size:14px;line-height:1.8;color:var(--ink-500);}
.footer-col h4,
.footer-col summary{
  font-size:15px;
  font-weight:600;
  color:var(--ink-900);
  margin-bottom:14px;
  list-style:none;
  cursor:pointer;
}
.footer-col summary::-webkit-details-marker{display:none;}
.footer-inner ul{list-style:none;}
.footer-inner li{margin-bottom:10px;}
.footer-inner a{
  font-size:14px;
  color:var(--ink-500);
  transition:color var(--t);
}
.footer-inner a:hover{color:var(--brand-600);}
.footer-form{display:flex;flex-direction:column;}
.footer-form label{
  font-size:14px;
  font-weight:600;
  color:var(--ink-700);
  margin-bottom:6px;
}
.footer-form input,
.footer-form textarea{
  width:100%;
  border:1px solid var(--line);
  border-radius:var(--radius-btn);
  background:#fff;
  padding:11px 14px;
  font-size:14px;
  color:var(--ink-900);
  margin-bottom:14px;
  transition:border-color var(--t),box-shadow var(--t);
}
.footer-form input{height:44px;}
.footer-form input::placeholder,
.footer-form textarea::placeholder{color:var(--ink-300);}
.footer-form input:focus,
.footer-form textarea:focus{
  outline:none;
  border-color:var(--brand-600);
  box-shadow:0 0 0 3px rgba(37,99,235,.12);
}
.footer-form .btn{align-self:flex-start;}
.footer-bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  margin-top:48px;
  padding:20px 0 24px;
  border-top:1px solid var(--line);
  font-size:13px;
  color:var(--ink-300);
}
.back-top{color:var(--ink-500);font-size:13px;transition:color var(--t);}
.back-top:hover{color:var(--brand-600);}

/* ---------- 响应式 ---------- */
@media (max-width:1200px){
  .post-layout{grid-template-columns:minmax(0,1fr) 300px;gap:36px;}
}
@media (max-width:992px){
  .header-inner{
    flex-wrap:wrap;
    gap:12px;
    padding-top:10px;
    padding-bottom:12px;
    min-height:60px;
  }
  .logo{order:1;max-width:200px;}
  .logo-text{font-size:15px;}
  .menu-toggle{display:inline-flex;order:2;margin-left:auto;}
  .nav-search{
    order:3;
    flex:1 1 100%;
    max-width:none;
    height:42px;
  }
  .nav-links,.nav-cta{display:none;}
  .post-layout{grid-template-columns:minmax(0,1fr);gap:32px;}
  .post-aside{position:static;top:auto;}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .cta-panel{padding:40px 24px;margin:48px 0 56px;}
}
@media (max-width:768px){
  .container{padding:0 20px;}
  .post-head h1{font-size:26px;}
  .article-content h2{font-size:22px;margin-top:32px;}
  .article-content h3{font-size:18px;}
  .article-content{font-size:16px;line-height:1.85;}
  .related-head{flex-direction:column;align-items:flex-start;}
  .cta-panel h2{font-size:23px;}
}
@media (max-width:520px){
  .post-head h1{font-size:24px;}
  .logo-text{font-size:14px;max-width:150px;}
  .related-grid{grid-template-columns:minmax(0,1fr);}
  .related-card img{width:104px;height:70px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .search-btn{display:none;}
  .nav-search{padding-right:14px;}
}

/* roulang page: category1 */
:root{
  --brand-700:#1B4FD8;
  --brand-600:#2563EB;
  --brand-500:#3B82F6;
  --brand-100:#DCE7FF;
  --brand-50:#EEF4FF;
  --accent-500:#12B7A8;
  --accent-100:#D6F5F1;
  --cta-500:#FF7A3D;
  --cta-600:#F26522;
  --ink-900:#0E1729;
  --ink-700:#243247;
  --ink-500:#5A6B82;
  --ink-300:#93A2B8;
  --line:#E6ECF5;
  --bg:#F6F8FC;
  --surface:#FFFFFF;
  --radius-card:16px;
  --radius-panel:24px;
  --radius-btn:12px;
  --radius-pill:999px;
  --shadow-card:0 4px 20px rgba(21,45,90,.06);
  --shadow-hover:0 14px 36px rgba(21,45,90,.12);
  --shadow-nav:0 2px 16px rgba(21,45,90,.06);
  --sp-1:4px; --sp-2:8px; --sp-3:12px; --sp-4:16px;
  --sp-5:24px; --sp-6:32px; --sp-7:48px; --sp-8:64px; --sp-9:88px;
  --font-sans:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:96px;}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.8;
  color:var(--ink-700);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding:0;list-style:none;}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;}
button,input,textarea,select{font:inherit;color:inherit;}
button{background:none;border:0;cursor:pointer;}
:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;border-radius:4px;}
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 24px;
}
.visually-hidden{
  position:absolute;width:1px;height:1px;padding:0;margin:-1px;
  overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:44px;
  padding:0 22px;
  border-radius:var(--radius-btn);
  font-size:15px;
  font-weight:600;
  line-height:1;
  white-space:nowrap;
  transition:background-color .22s ease,color .22s ease,border-color .22s ease,box-shadow .22s ease,transform .22s ease;
}
.btn:active{transform:translateY(1px);}
.btn-primary{background:var(--brand-600);color:#fff;}
.btn-primary:hover{background:var(--brand-700);}
.btn-cta{background:var(--cta-500);color:#fff;box-shadow:0 6px 18px rgba(255,122,61,.28);}
.btn-cta:hover{background:var(--cta-600);}
.btn-outline{background:#fff;color:var(--brand-600);border:1px solid var(--brand-600);}
.btn-outline:hover{background:var(--brand-50);}
.btn-ghost{background:transparent;color:var(--brand-600);padding:0 4px;height:auto;}
.btn-ghost:hover{text-decoration:underline;text-underline-offset:4px;}
.btn-sm{height:40px;padding:0 18px;font-size:14px;}
.btn-xs{height:36px;padding:0 14px;font-size:14px;}
.btn:disabled,.btn[disabled]{opacity:.45;cursor:not-allowed;}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:#fff;
  border-bottom:1px solid var(--line);
  box-shadow:var(--shadow-nav);
}
.header-inner{
  display:flex;
  align-items:center;
  gap:24px;
  height:72px;
}
.logo{
  display:inline-flex;
  align-items:center;
  gap:10px;
  max-width:260px;
  flex:0 0 auto;
}
.logo-mark{display:inline-flex;flex:0 0 auto;}
.logo-text{
  font-size:17px;
  font-weight:700;
  color:var(--ink-900);
  letter-spacing:-.01em;
  white-space:nowrap;
}
.nav-search{
  position:relative;
  flex:1 1 auto;
  max-width:520px;
  min-width:220px;
}
.nav-search .search-icon{
  position:absolute;
  left:16px;
  top:50%;
  transform:translateY(-50%);
  color:var(--ink-300);
  pointer-events:none;
  transition:color .22s ease;
}
.nav-search input{
  width:100%;
  height:44px;
  padding:0 96px 0 46px;
  border:1px solid var(--line);
  border-radius:var(--radius-pill);
  background:#FBFCFE;
  color:var(--ink-900);
  font-size:14px;
  transition:border-color .22s ease,box-shadow .22s ease,background-color .22s ease;
}
.nav-search input::placeholder{color:var(--ink-300);font-size:14px;}
.nav-search input:focus{
  outline:none;
  background:#fff;
  border-color:var(--brand-600);
  box-shadow:0 0 0 3px rgba(37,99,235,.12);
}
.nav-search input:focus + .search-icon,
.nav-search:focus-within .search-icon{color:var(--brand-600);}
.nav-search .search-submit{
  position:absolute;
  right:5px;
  top:50%;
  transform:translateY(-50%);
  height:34px;
  padding:0 16px;
  border-radius:var(--radius-pill);
  background:var(--brand-50);
  color:var(--brand-600);
  font-size:13px;
  font-weight:600;
  transition:background-color .22s ease,color .22s ease;
}
.nav-search .search-submit:hover{background:var(--brand-100);}
.nav-links{
  display:flex;
  align-items:center;
  gap:26px;
  flex:0 0 auto;
}
.nav-link{
  position:relative;
  font-size:14px;
  color:var(--ink-700);
  padding:6px 0;
  transition:color .22s ease;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;
  bottom:-2px;
  width:0;
  height:2px;
  background:var(--brand-600);
  transition:width .22s ease;
}
.nav-link:hover{color:var(--brand-600);}
.nav-link:hover::after{width:100%;}
.nav-link.active{color:var(--brand-600);font-weight:600;}
.nav-link.active::after{width:100%;}
.nav-cta{flex:0 0 auto;}
.nav-toggle{
  display:none;
  width:44px;
  height:44px;
  align-items:center;
  justify-content:center;
  border:1px solid var(--line);
  border-radius:var(--radius-btn);
  color:var(--ink-700);
  flex:0 0 auto;
  transition:background-color .22s ease,border-color .22s ease;
}
.nav-toggle:hover{background:var(--brand-50);border-color:var(--brand-100);}
.drawer{
  display:none;
  border-top:1px solid var(--line);
  background:#fff;
  padding:16px 0 22px;
}
.drawer.open{display:block;}
.drawer .drawer-search{position:relative;margin-bottom:14px;}
.drawer .drawer-search input{
  width:100%;
  height:42px;
  padding:0 90px 0 44px;
  border:1px solid var(--line);
  border-radius:var(--radius-pill);
  background:#FBFCFE;
  font-size:14px;
}
.drawer .drawer-search input:focus{
  outline:none;background:#fff;border-color:var(--brand-600);
  box-shadow:0 0 0 3px rgba(37,99,235,.12);
}
.drawer .drawer-search .search-icon{
  position:absolute;left:15px;top:50%;transform:translateY(-50%);color:var(--ink-300);
}
.drawer .drawer-search .search-submit{
  position:absolute;right:4px;top:50%;transform:translateY(-50%);
  height:32px;padding:0 14px;border-radius:var(--radius-pill);
  background:var(--brand-50);color:var(--brand-600);font-size:13px;font-weight:600;
}
.drawer-list li{border-bottom:1px solid var(--line);}
.drawer-list a{
  display:flex;
  align-items:center;
  justify-content:space-between;
  height:48px;
  font-size:15px;
  color:var(--ink-700);
}
.drawer-list a:hover{color:var(--brand-600);}
.drawer-list a.active{color:var(--brand-600);font-weight:600;}
.drawer-cta{display:block;width:100%;margin-top:16px;}

/* ---------- 面包屑 ---------- */
.breadcrumb-bar{padding-top:22px;}
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  min-height:44px;
  font-size:14px;
  color:var(--ink-500);
}
.breadcrumb a{color:var(--ink-500);transition:color .22s ease;}
.breadcrumb a:hover{color:var(--brand-600);}
.breadcrumb .sep{color:var(--ink-300);}
.breadcrumb .current{color:var(--ink-900);font-weight:600;}

/* ---------- 页头 ---------- */
.cat-hero{
  padding:20px 0 56px;
}
.cat-hero-inner{
  display:grid;
  grid-template-columns:1.05fr .95fr;
  gap:48px;
  align-items:center;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  height:28px;
  padding:0 14px;
  margin-bottom:18px;
  border-radius:var(--radius-pill);
  background:var(--accent-100);
  color:#0B7E74;
  font-size:13px;
  font-weight:600;
}
.cat-hero h1{
  font-size:42px;
  line-height:1.25;
  font-weight:700;
  letter-spacing:-.01em;
  color:var(--ink-900);
  margin-bottom:20px;
}
.cat-hero .lead{
  font-size:16px;
  line-height:1.85;
  color:var(--ink-500);
  max-width:620px;
}
.cat-hero .lead + .lead{margin-top:12px;}
.hero-actions{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  margin-top:28px;
}
.hero-media{
  border-radius:var(--radius-panel);
  overflow:hidden;
  box-shadow:var(--shadow-card);
  background:#fff;
}
.hero-media img{
  width:100%;
  aspect-ratio:16/10;
  object-fit:cover;
}
.hero-trust{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:18px;
  margin-top:26px;
  padding-top:22px;
  border-top:1px solid var(--line);
}
.hero-trust li{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:14px;
  color:var(--ink-500);
}
.hero-trust li + li{padding-left:18px;border-left:1px solid var(--line);}
.hero-trust svg{color:var(--accent-500);flex:0 0 auto;}

/* ---------- 搜索条 ---------- */
.page-search{
  margin-top:32px;
  max-width:560px;
}
.page-search .search-box{
  position:relative;
  display:flex;
  align-items:center;
}
.page-search input{
  width:100%;
  height:48px;
  padding:0 110px 0 46px;
  border:1px solid var(--line);
  border-radius:var(--radius-btn);
  background:#fff;
  font-size:14px;
  box-shadow:var(--shadow-card);
  transition:border-color .22s ease,box-shadow .22s ease;
}
.page-search input::placeholder{color:var(--ink-300);}
.page-search input:focus{
  outline:none;
  border-color:var(--brand-600);
  box-shadow:0 0 0 3px rgba(37,99,235,.12);
}
.page-search .search-icon{
  position:absolute;
  left:16px;
  top:50%;
  transform:translateY(-50%);
  color:var(--ink-300);
  pointer-events:none;
}
.page-search .search-submit{
  position:absolute;
  right:5px;
  top:50%;
  transform:translateY(-50%);
  height:38px;
  padding:0 18px;
  border-radius:10px;
  background:var(--brand-600);
  color:#fff;
  font-size:14px;
  font-weight:600;
  transition:background-color .22s ease;
}
.page-search .search-submit:hover{background:var(--brand-700);}
.page-search .field-hint{
  margin-top:10px;
  font-size:13px;
  color:var(--ink-300);
}

/* ---------- 主体布局 ---------- */
main{display:block;}
.section{padding:88px 0;}
.section-tight{padding:64px 0;}
.section-alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{max-width:760px;margin-bottom:44px;}
.section-head h2{
  font-size:32px;
  line-height:1.3;
  font-weight:700;
  letter-spacing:-.01em;
  color:var(--ink-900);
  margin-bottom:14px;
}
.section-head p{font-size:16px;line-height:1.8;color:var(--ink-500);}

.cat-layout{
  display:grid;
  grid-template-columns:200px minmax(0,1fr);
  gap:56px;
  align-items:start;
}
.anchor-nav{
  position:sticky;
  top:96px;
  align-self:start;
}
.anchor-nav h2{
  font-size:13px;
  font-weight:700;
  letter-spacing:.06em;
  color:var(--ink-300);
  text-transform:uppercase;
  margin-bottom:14px;
}
.anchor-nav ul{display:flex;flex-direction:column;gap:2px;}
.anchor-nav a{
  display:block;
  padding:9px 0 9px 12px;
  border-left:2px solid transparent;
  font-size:14px;
  line-height:1.5;
  color:var(--ink-500);
  transition:color .22s ease,border-color .22s ease,background-color .22s ease;
}
.anchor-nav a:hover{color:var(--brand-600);}
.anchor-nav a.active{
  color:var(--brand-600);
  font-weight:600;
  border-left-color:var(--brand-600);
  background:var(--brand-50);
  border-radius:0 8px 8px 0;
}
.anchor-tabs{
  display:none;
  gap:8px;
  overflow-x:auto;
  padding-bottom:6px;
  margin-bottom:28px;
  -webkit-overflow-scrolling:touch;
  scrollbar-width:none;
}
.anchor-tabs::-webkit-scrollbar{display:none;}
.anchor-tabs a{
  flex:0 0 auto;
  display:inline-flex;
  align-items:center;
  height:38px;
  padding:0 16px;
  border:1px solid var(--line);
  border-radius:var(--radius-pill);
  background:#fff;
  font-size:13px;
  color:var(--ink-500);
  white-space:nowrap;
  transition:color .22s ease,border-color .22s ease,background-color .22s ease;
}
.anchor-tabs a:hover{color:var(--brand-600);border-color:var(--brand-100);}
.anchor-tabs a.active{
  color:var(--brand-700);
  background:var(--brand-50);
  border-color:var(--brand-100);
  font-weight:600;
}

/* ---------- 图文交替块 ---------- */
.feature-block{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:48px;
  align-items:center;
  padding:36px 0;
  scroll-margin-top:100px;
}
.feature-block + .feature-block{border-top:1px solid var(--line);}
.feature-block.reverse .feature-media{order:2;}
.feature-media{
  border-radius:var(--radius-card);
  overflow:hidden;
  background:#fff;
  box-shadow:var(--shadow-card);
  border:1px solid var(--line);
  transition:box-shadow .22s ease,transform .22s ease;
}
.feature-media:hover{box-shadow:var(--shadow-hover);transform:translateY(-4px);}
.feature-media img{
  width:100%;
  aspect-ratio:16/10;
  object-fit:cover;
}
.feature-body .step-tag{
  display:inline-flex;
  align-items:center;
  gap:8px;
  height:26px;
  padding:0 12px;
  margin-bottom:14px;
  border-radius:var(--radius-pill);
  background:var(--brand-50);
  color:var(--brand-700);
  font-size:12px;
  font-weight:700;
}
.feature-body h3{
  font-size:22px;
  line-height:1.4;
  font-weight:600;
  color:var(--ink-900);
  margin-bottom:14px;
}
.feature-body p{
  font-size:15px;
  line-height:1.8;
  color:var(--ink-500);
  margin-bottom:12px;
}
.feature-body p:last-of-type{margin-bottom:0;}
.text-link{
  display:inline-flex;
  align-items:center;
  gap:6px;
  margin-top:16px;
  font-size:14px;
  font-weight:600;
  color:var(--brand-600);
  transition:color .22s ease;
}
.text-link:hover{color:var(--brand-700);text-decoration:underline;text-underline-offset:4px;}

/* ---------- 要点横排 ---------- */
.points-row{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;
  margin-top:8px;
}
.point-item{
  display:flex;
  gap:16px;
  padding:24px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);
  transition:box-shadow .22s ease,transform .22s ease;
}
.point-item:hover{box-shadow:var(--shadow-hover);transform:translateY(-4px);}
.point-item .pi-icon{
  flex:0 0 auto;
  width:44px;
  height:44px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border-radius:12px;
  background:var(--accent-100);
  color:var(--accent-500);
}
.point-item h4{
  font-size:17px;
  font-weight:600;
  color:var(--ink-900);
  margin-bottom:6px;
}
.point-item p{font-size:14px;line-height:1.75;color:var(--ink-500);}

/* ---------- FAQ ---------- */
.faq-list{
  max-width:860px;
  border-top:1px solid var(--line);
}
.faq-item{
  border-bottom:1px solid var(--line);
  scroll-margin-top:100px;
}
.faq-item summary{
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:20px;
  padding:22px 0 22px 0;
  font-size:16px;
  font-weight:600;
  line-height:1.6;
  color:var(--ink-900);
  cursor:pointer;
  list-style:none;
  transition:color .22s ease;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:var(--brand-600);}
.faq-item summary .faq-icon{
  flex:0 0 auto;
  position:relative;
  width:22px;
  height:22px;
  margin-top:2px;
  color:var(--accent-500);
}
.faq-item summary .faq-icon::before,
.faq-item summary .faq-icon::after{
  content:"";
  position:absolute;
  left:50%;
  top:50%;
  background:currentColor;
  border-radius:2px;
  transform:translate(-50%,-50%);
}
.faq-item summary .faq-icon::before{width:14px;height:2px;}
.faq-item summary .faq-icon::after{width:2px;height:14px;transition:transform .22s ease;}
.faq-item[open] summary .faq-icon::after{transform:translate(-50%,-50%) scaleY(0);}
.faq-answer{
  position:relative;
  padding:0 0 24px 16px;
  font-size:15px;
  line-height:1.8;
  color:var(--ink-500);
}
.faq-answer::before{
  content:"";
  position:absolute;
  left:0;
  top:6px;
  bottom:26px;
  width:3px;
  border-radius:3px;
  background:var(--brand-600);
}
.faq-answer p + p{margin-top:10px;}

/* ---------- 底部 CTA ---------- */
.cta-panel{
  background:var(--brand-50);
  border-radius:var(--radius-panel);
  padding:56px 40px;
  text-align:center;
}
.cta-panel h2{
  font-size:30px;
  line-height:1.3;
  font-weight:700;
  color:var(--ink-900);
  margin-bottom:12px;
}
.cta-panel p{
  max-width:620px;
  margin:0 auto;
  font-size:16px;
  line-height:1.8;
  color:var(--ink-500);
}
.cta-actions{
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  gap:14px;
  margin-top:28px;
}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:88px;
  background:#F1F5FB;
  border-top:1px solid var(--line);
  padding:56px 0 24px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.3fr;
  gap:40px;
}
.footer-brand .logo{margin-bottom:16px;}
.footer-brand p{font-size:14px;line-height:1.75;color:var(--ink-500);}
.footer-col h4{
  font-size:14px;
  font-weight:700;
  color:var(--ink-900);
  margin-bottom:14px;
}
.footer-col summary{
  font-size:14px;
  font-weight:700;
  color:var(--ink-900);
  cursor:pointer;
  list-style:none;
  margin-bottom:14px;
}
.footer-col summary::-webkit-details-marker{display:none;}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col li a{font-size:14px;color:var(--ink-500);transition:color .22s ease;}
.footer-col li a:hover{color:var(--brand-600);}
.footer-form{display:flex;flex-direction:column;gap:6px;}
.footer-form label{font-size:13px;font-weight:600;color:var(--ink-700);}
.footer-form input,
.footer-form textarea{
  width:100%;
  padding:10px 12px;
  border:1px solid var(--line);
  border-radius:var(--radius-btn);
  background:#fff;
  font-size:14px;
  line-height:1.6;
  transition:border-color .22s ease,box-shadow .22s ease;
}
.footer-form input{height:44px;padding:0 12px;}
.footer-form input::placeholder,
.footer-form textarea::placeholder{color:var(--ink-300);}
.footer-form input:focus,
.footer-form textarea:focus{
  outline:none;
  border-color:var(--brand-600);
  box-shadow:0 0 0 3px rgba(37,99,235,.12);
}
.footer-form .btn{margin-top:8px;align-self:flex-start;}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  margin-top:44px;
  padding-top:20px;
  border-top:1px solid var(--line);
  font-size:13px;
  color:var(--ink-500);
}
.back-top{color:var(--ink-500);transition:color .22s ease;}
.back-top:hover{color:var(--brand-600);}

/* ---------- 响应式 ---------- */
@media (max-width:1200px){
  .cat-hero-inner{gap:36px;}
  .cat-layout{grid-template-columns:180px minmax(0,1fr);gap:40px;}
}
@media (max-width:992px){
  .header-inner{flex-wrap:wrap;height:auto;padding:12px 0;gap:12px;}
  .nav-links{display:none;}
  .nav-cta{display:none;}
  .nav-toggle{display:inline-flex;margin-left:auto;}
  .nav-search{display:none;}
  .logo{max-width:220px;}
  .logo-text{font-size:15px;}
  .cat-hero{padding:12px 0 44px;}
  .cat-hero-inner{grid-template-columns:1fr;gap:32px;}
  .cat-hero h1{font-size:34px;}
  .hero-media{order:2;}
  .section{padding:64px 0;}
  .section-tight{padding:56px 0;}
  .section-head h2{font-size:26px;}
  .cat-layout{grid-template-columns:1fr;gap:0;}
  .anchor-nav{display:none;}
  .anchor-tabs{display:flex;}
  .feature-block{grid-template-columns:1fr;gap:24px;padding:32px 0;}
  .feature-block.reverse .feature-media{order:0;}
  .points-row{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .footer-brand{grid-column:1 / -1;}
}
@media (max-width:768px){
  .container{padding:0 20px;}
  .cat-hero h1{font-size:30px;}
  .section{padding:56px 0;}
  .section-head{margin-bottom:32px;}
  .section-head h2{font-size:24px;}
  .cta-panel{padding:40px 22px;}
  .cta-panel h2{font-size:24px;}
  .faq-item summary{font-size:15px;padding:18px 0;}
  .hero-trust{gap:12px;}
  .hero-trust li + li{padding-left:12px;}
  .footer-grid{grid-template-columns:1fr;gap:8px;}
  .footer-col{border-bottom:1px solid var(--line);padding-bottom:8px;}
  .footer-col summary{margin-bottom:0;padding:14px 0;}
  .footer-col .footer-inner{padding-bottom:14px;}
  .footer-bottom{margin-top:28px;}
}
@media (max-width:480px){
  .cat-hero h1{font-size:27px;}
  .page-search input{height:46px;padding-right:96px;}
  .page-search .search-submit{height:36px;padding:0 14px;font-size:13px;}
  .hero-actions .btn{width:100%;}
  .cta-actions{flex-direction:column;}
  .cta-actions .btn{width:100%;}
  .point-item{padding:20px;}
  .feature-media img{aspect-ratio:16/11;}
}

/* roulang page: category2 */
:root{
  --brand-700:#1B4FD8;
  --brand-600:#2563EB;
  --brand-500:#3B82F6;
  --brand-100:#DCE7FF;
  --brand-50:#EEF4FF;
  --accent-500:#12B7A8;
  --accent-100:#D6F5F1;
  --cta-500:#FF7A3D;
  --cta-600:#F26522;
  --ink-900:#0E1729;
  --ink-700:#243247;
  --ink-500:#5A6B82;
  --ink-300:#93A2B8;
  --line:#E6ECF5;
  --bg:#F6F8FC;
  --surface:#FFFFFF;
  --danger:#E5484D;
  --radius-card:16px;
  --radius-panel:24px;
  --radius-btn:12px;
  --radius-img:12px;
  --radius-pill:999px;
  --shadow-card:0 4px 20px rgba(21,45,90,.06);
  --shadow-hover:0 14px 36px rgba(21,45,90,.12);
  --shadow-nav:0 2px 16px rgba(21,45,90,.06);
  --ease:.22s ease;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  padding-bottom:64px;
  font-family:Inter,-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--ink-900);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:var(--brand-600);text-decoration:none;transition:color var(--ease)}
a:hover{color:var(--brand-700)}
h1,h2,h3,h4{margin:0;letter-spacing:-.01em;color:var(--ink-900)}
h1{font-size:42px;line-height:1.25;font-weight:700}
h2{font-size:32px;line-height:1.3;font-weight:700}
h3{font-size:22px;line-height:1.4;font-weight:600}
h4{font-size:18px;line-height:1.5;font-weight:600}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
button,input,textarea{font-family:inherit;font-size:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:88px 0}
.section-tight{padding:56px 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px}
.section-head p{color:var(--ink-500);font-size:15px;margin-top:8px;max-width:640px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--accent-500);background:var(--accent-100);border-radius:var(--radius-pill);padding:6px 14px;line-height:1.4}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent-500)}
.badge{display:inline-block;font-size:12px;line-height:1.4;color:var(--accent-500);background:var(--accent-100);border-radius:var(--radius-pill);padding:4px 12px;font-weight:600}
.muted{color:var(--ink-500)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;line-height:1;white-space:nowrap;
  border:1px solid transparent;transition:background-color var(--ease),color var(--ease),border-color var(--ease),box-shadow var(--ease),transform var(--ease);
}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--brand-600);color:#fff}
.btn-primary:hover{background:var(--brand-700);color:#fff}
.btn-cta{background:var(--cta-500);color:#fff;box-shadow:0 6px 18px rgba(255,122,61,.28)}
.btn-cta:hover{background:var(--cta-600);color:#fff}
.btn-outline{border-color:var(--brand-600);color:var(--brand-600);background:transparent}
.btn-outline:hover{background:var(--brand-50);color:var(--brand-700)}
.btn-ghost{color:var(--brand-600);padding:0 4px;height:auto}
.btn-ghost:hover{text-decoration:underline;text-underline-offset:4px}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed}
.text-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand-600)}
.text-link::after{content:"→";transition:transform var(--ease)}
.text-link:hover::after{transform:translateX(4px)}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;background:var(--surface);
  border-bottom:1px solid var(--line);box-shadow:var(--shadow-nav);
}
.header-inner{display:flex;align-items:center;gap:24px;min-height:72px;padding:8px 24px}
.logo{display:inline-flex;align-items:center;gap:10px;max-width:260px;flex:0 0 auto;color:var(--ink-900)}
.logo:hover{color:var(--ink-900)}
.logo-mark{display:inline-flex;align-items:center;justify-content:center;line-height:0}
.logo-text{font-size:17px;font-weight:700;letter-spacing:-.01em;white-space:nowrap}
.nav-search{
  position:relative;display:flex;align-items:center;flex:1 1 auto;max-width:520px;
  height:44px;border:1px solid var(--line);border-radius:var(--radius-pill);
  background:#fff;padding:0 6px 0 14px;transition:border-color var(--ease),box-shadow var(--ease);
}
.nav-search:focus-within{border-color:var(--brand-600);box-shadow:0 0 0 3px rgba(37,99,235,.12)}
.nav-search .search-icon{flex:0 0 auto;color:var(--ink-300);line-height:0;transition:color var(--ease)}
.nav-search:focus-within .search-icon{color:var(--brand-600)}
.nav-search input{
  flex:1 1 auto;min-width:0;height:100%;border:0;outline:none;background:transparent;
  font-size:14px;color:var(--ink-900);padding:0 10px;
}
.nav-search input::placeholder{color:var(--ink-300);font-size:14px}
.search-submit{
  flex:0 0 auto;height:34px;padding:0 16px;border-radius:var(--radius-pill);
  background:var(--brand-50);color:var(--brand-700);font-size:14px;font-weight:600;
  transition:background-color var(--ease),color var(--ease);
}
.search-submit:hover{background:var(--brand-100)}
.nav-links{display:flex;align-items:center;gap:24px;margin-left:auto}
.nav-link{
  position:relative;font-size:14px;color:var(--ink-700);font-weight:500;padding:6px 0;white-space:nowrap;
  transition:color var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;border-radius:2px;
  background:transparent;transition:background-color var(--ease);
}
.nav-link:hover{color:var(--brand-600)}
.nav-link:hover::after{background:var(--brand-100)}
.nav-link.active{color:var(--brand-700);font-weight:600}
.nav-link.active::after{background:var(--brand-600)}
.nav-cta{flex:0 0 auto}
.nav-toggle{display:none;width:44px;height:44px;border-radius:var(--radius-btn);border:1px solid var(--line);align-items:center;justify-content:center;color:var(--ink-700)}
.nav-toggle:hover{background:var(--brand-50);color:var(--brand-700)}
.mobile-panel{display:none;border-top:1px solid var(--line);background:#fff;padding:8px 24px 20px}
.mobile-panel.open{display:block}
.mobile-panel .mobile-list a{
  display:flex;align-items:center;justify-content:space-between;min-height:48px;
  font-size:15px;color:var(--ink-700);border-bottom:1px solid var(--line);
}
.mobile-panel .mobile-list a:hover{color:var(--brand-600)}
.mobile-panel .mobile-list a[aria-current="page"]{color:var(--brand-700);font-weight:600}
.mobile-panel .btn{width:100%;margin-top:16px}
.mobile-panel .chev{color:var(--ink-300);line-height:0}

/* ---------- 页头 ---------- */
.breadcrumb{padding:20px 0 0;font-size:14px;color:var(--ink-500);display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumb a{color:var(--ink-500)}
.breadcrumb a:hover{color:var(--brand-600)}
.breadcrumb .sep{color:var(--ink-300)}
.breadcrumb .current{color:var(--ink-900);font-weight:600}
.page-head{padding:24px 0 56px;background:linear-gradient(180deg,#FFFFFF 0%,var(--bg) 100%)}
.page-head-inner{max-width:820px}
.page-head h1{margin:16px 0 20px}
.lead{font-size:16px;line-height:1.8;color:var(--ink-500)}
.lead + .lead{margin-top:14px}
.head-meta{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin-top:24px;font-size:14px;color:var(--ink-500)}
.head-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--ink-300)}

/* ---------- 通栏搜索条 ---------- */
.search-band{margin-top:8px}
.search-band-form{
  display:flex;align-items:center;gap:12px;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--radius-btn);box-shadow:var(--shadow-card);
  padding:8px 8px 8px 18px;min-height:48px;transition:border-color var(--ease),box-shadow var(--ease);
}
.search-band-form:focus-within{border-color:var(--brand-600);box-shadow:0 0 0 3px rgba(37,99,235,.12)}
.search-band-form .search-icon{color:var(--ink-300);line-height:0;flex:0 0 auto}
.search-band-form:focus-within .search-icon{color:var(--brand-600)}
.search-band-form input{flex:1 1 auto;min-width:0;border:0;outline:none;background:transparent;font-size:15px;height:44px}
.search-band-form input::placeholder{color:var(--ink-300)}
.search-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}
.search-tag{
  display:inline-flex;align-items:center;height:32px;padding:0 14px;border-radius:var(--radius-pill);
  background:var(--surface);border:1px solid var(--line);font-size:13px;color:var(--ink-700);
  transition:border-color var(--ease),color var(--ease),background-color var(--ease);
}
.search-tag:hover{border-color:var(--brand-600);color:var(--brand-700);background:var(--brand-50)}

/* ---------- 2×2 卡片网格 ---------- */
.grid-2x2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.info-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:32px;box-shadow:var(--shadow-card);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.info-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:var(--brand-100)}
.card-icon{
  width:48px;height:48px;border-radius:14px;background:var(--accent-100);color:var(--accent-500);
  display:flex;align-items:center;justify-content:center;margin-bottom:20px;line-height:0;
}
.info-card h3{margin-bottom:12px}
.info-card p{font-size:15px;line-height:1.75;color:var(--ink-500)}
.info-card .text-link{margin-top:18px}

/* ---------- 图文块 ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.split.reverse .split-media{order:2}
.split-media img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--radius-panel);box-shadow:var(--shadow-card)}
.split-body h2{margin-bottom:18px}
.split-body p{font-size:16px;line-height:1.8;color:var(--ink-500)}
.split-body p + p{margin-top:14px}
.panel-soft{background:var(--bg);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.check-list{margin:22px 0 0;display:grid;gap:12px}
.check-list li{display:flex;gap:12px;font-size:15px;line-height:1.75;color:var(--ink-700)}
.check-list li::before{
  content:"";flex:0 0 auto;width:16px;height:16px;margin-top:7px;border-radius:5px;
  background:var(--accent-100);border:1px solid var(--accent-500);
}
.check-list strong{color:var(--ink-900)}

/* ---------- 提示对照 ---------- */
.hint-table{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;box-shadow:var(--shadow-card)}
.hint-row{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1.6fr);gap:24px;padding:20px 28px;border-bottom:1px solid var(--line);transition:background-color var(--ease)}
.hint-row:last-child{border-bottom:0}
.hint-row:hover{background:var(--brand-50)}
.hint-row .hint-key{font-size:15px;font-weight:600;color:var(--ink-900)}
.hint-row .hint-val{font-size:15px;line-height:1.75;color:var(--ink-500)}

/* ---------- FAQ ---------- */
.faq-list{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-card);padding:8px 28px}
.faq-item{border-bottom:1px solid var(--line);position:relative}
.faq-item:last-child{border-bottom:0}
.faq-item::before{content:"";position:absolute;left:-28px;top:24px;bottom:24px;width:3px;background:transparent;border-radius:0 3px 3px 0;transition:background-color var(--ease)}
.faq-item[open]::before{background:var(--brand-600)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:24px 0;font-size:16px;font-weight:600;color:var(--ink-900);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--brand-700)}
.faq-plus{flex:0 0 auto;width:22px;height:22px;position:relative;color:var(--accent-500)}
.faq-plus::before,.faq-plus::after{content:"";position:absolute;background:currentColor;border-radius:2px;transition:transform var(--ease)}
.faq-plus::before{left:0;right:0;top:10px;height:2px}
.faq-plus::after{top:0;bottom:0;left:10px;width:2px}
.faq-item[open] .faq-plus::after{transform:scaleY(0)}
.faq-answer{padding:0 0 24px;font-size:15px;line-height:1.8;color:var(--ink-500);max-width:840px}

/* ---------- CTA ---------- */
.cta-band{background:var(--brand-50);border-radius:var(--radius-panel);padding:56px 40px;text-align:center;box-shadow:var(--shadow-card)}
.cta-band h2{margin-bottom:14px}
.cta-band p{max-width:620px;margin:0 auto 28px;color:var(--ink-500);font-size:16px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center}

/* ---------- 页脚 ---------- */
.site-footer{background:#F1F5FB;border-top:1px solid var(--line);padding:64px 0 0;margin-top:88px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px}
.footer-brand .logo{margin-bottom:16px}
.footer-brand p{font-size:14px;line-height:1.8;color:var(--ink-500);max-width:320px}
.footer-col summary{
  list-style:none;cursor:pointer;font-size:15px;font-weight:600;color:var(--ink-900);margin-bottom:16px;
  display:flex;align-items:center;justify-content:space-between;
}
.footer-col summary::-webkit-details-marker{display:none}
.footer-col h4{margin-bottom:16px;font-size:15px}
.footer-inner ul{display:grid;gap:12px}
.footer-inner a{font-size:14px;color:var(--ink-500)}
.footer-inner a:hover{color:var(--brand-600)}
.footer-form{display:grid;gap:8px}
.footer-form label{font-size:14px;font-weight:600;color:var(--ink-700)}
.footer-form input,.footer-form textarea{
  width:100%;border:1px solid var(--line);border-radius:var(--radius-btn);background:#fff;
  padding:10px 14px;font-size:14px;outline:none;transition:border-color var(--ease),box-shadow var(--ease);
}
.footer-form input{height:44px;padding:0 14px}
.footer-form input:focus,.footer-form textarea:focus{border-color:var(--brand-600);box-shadow:0 0 0 3px rgba(37,99,235,.12)}
.footer-form input::placeholder,.footer-form textarea::placeholder{color:var(--ink-300)}
.footer-form .btn{justify-self:start;margin-top:8px}
.footer-bottom{
  margin-top:48px;border-top:1px solid var(--line);padding:20px 0;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
}
.footer-bottom p{font-size:13px;color:var(--ink-500)}
.back-top{font-size:13px;color:var(--ink-500)}
.back-top:hover{color:var(--brand-600)}

/* ---------- 底部固定转化条 ---------- */
.sticky-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:80;background:#fff;
  border-top:1px solid var(--line);box-shadow:var(--shadow-card);
  height:64px;padding-bottom:env(safe-area-inset-bottom);
}
.sticky-inner{
  max-width:1200px;margin:0 auto;padding:0 24px;height:64px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.sticky-inner p{font-size:14px;color:var(--ink-700)}
.sticky-inner p strong{color:var(--ink-900)}
.sticky-actions{display:flex;gap:12px;align-items:center}

/* ---------- 响应式 ---------- */
@media (max-width:1200px){
  .header-inner{gap:20px}
  .nav-links{gap:18px}
  .nav-search{max-width:380px}
}
@media (max-width:1024px){
  .section{padding:64px 0}
  h1{font-size:34px}
  h2{font-size:27px}
  .split{gap:36px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:992px){
  .nav-links,.nav-cta{display:none}
  .nav-toggle{display:inline-flex;margin-left:auto}
  .header-inner{flex-wrap:wrap;padding:8px 24px 12px;min-height:60px;row-gap:10px}
  .nav-search{order:3;flex:1 1 100%;max-width:none;height:42px}
  .search-submit{display:none}
  .grid-2x2{grid-template-columns:1fr}
  .split{grid-template-columns:1fr;gap:28px}
  .split.reverse .split-media{order:0}
  .hint-row{grid-template-columns:1fr;gap:8px;padding:18px 24px}
  .faq-list{padding:8px 20px}
  .faq-item::before{left:-20px}
  .cta-band{padding:40px 24px}
}
@media (max-width:768px){
  .container{padding:0 20px}
  .section{padding:56px 0}
  h1{font-size:30px}
  h2{font-size:24px}
  h3{font-size:20px}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:28px}
  .page-head{padding:16px 0 40px}
  .cta-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr}
  .footer-col{background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);padding:0 16px}
  .footer-col summary{padding:16px 0;margin-bottom:0}
  .footer-col .footer-inner{padding-bottom:16px}
  .footer-col h4{padding:16px 0 8px}
  .footer-form{padding-bottom:20px}
  .sticky-bar{height:56px}
  .sticky-inner{height:auto;padding:8px 20px calc(8px + env(safe-area-inset-bottom));flex-direction:column;gap:8px}
  .sticky-inner p{display:none}
  .sticky-actions{width:100%}
  .sticky-actions .btn{flex:1 1 0;height:40px;font-size:14px}
  body{padding-bottom:76px}
}
@media (max-width:480px){
  .logo-text{font-size:15px}
  .info-card{padding:24px}
  .cta-band{padding:32px 18px;border-radius:var(--radius-card)}
}