/* roulang page: index */
:root{
  --bg:#F5F7FA; --surface:#FFFFFF; --ink:#0F1E2E; --ink-2:#47586C; --ink-3:#8593A5;
  --line:#E4EAF1; --brand:#14476B; --brand-deep:#0C3150; --brand-soft:#E8F0F6;
  --accent:#D98F2B; --accent-deep:#C07C1E; --accent-soft:#FBF1E1; --teal:#1F8A8A;
  --danger:#C0392B;
  --r-sm:8px; --r-md:12px; --r-lg:18px; --pill:999px;
  --sh-1:0 1px 2px rgba(15,30,46,.05);
  --sh-2:0 4px 12px -6px rgba(15,30,46,.12);
  --sh-3:0 18px 40px -24px rgba(15,30,46,.28);
  --sidebar-w:248px;
  --ease:cubic-bezier(.2,.6,.3,1);
  --bs-body-bg:#F5F7FA;
  --bs-body-color:#0F1E2E;
  --bs-primary:#14476B;
  --bs-primary-rgb:20,71,107;
  --bs-link-color:#14476B;
  --bs-link-hover-color:#0C3150;
  --bs-border-color:#E4EAF1;
  --bs-body-font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;padding:0;background:var(--bg);color:var(--ink);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;line-height:1.8;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--brand);text-decoration:none;transition:color .2s var(--ease)}
a:hover{color:var(--brand-deep)}
p{margin:0 0 .9em}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.01em;color:var(--ink)}
button,input,select,textarea{font-family:inherit;font-size:inherit}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible{outline:2px solid rgba(217,143,43,.6);outline-offset:2px;border-radius:4px}
.container,.container-lg,.container-xl{max-width:1180px;padding-left:24px;padding-right:24px}
@media (min-width:1200px){.container{max-width:1180px}}

/* ---------- App Shell ---------- */
.app-sidebar{
  position:fixed;top:0;left:0;bottom:0;width:var(--sidebar-w);
  background:var(--surface);border-right:1px solid var(--line);
  display:flex;flex-direction:column;padding:24px 16px 20px;z-index:1040;
}
.brand{display:flex;align-items:center;gap:11px;padding:0 8px 22px;color:var(--ink)}
.brand:hover{color:var(--ink)}
.brand-mark{
  width:38px;height:38px;flex:0 0 38px;border-radius:11px;
  background:linear-gradient(135deg,var(--brand) 0%,#1E6A96 100%);
  display:flex;align-items:center;justify-content:center;color:#fff;font-size:19px;
  box-shadow:0 6px 14px -8px rgba(20,71,107,.7);
}
.brand-text{font-size:17.5px;font-weight:700;letter-spacing:-.01em;white-space:nowrap}
.brand-sub{display:block;font-size:11.5px;color:var(--ink-3);font-weight:400;letter-spacing:.04em;line-height:1.2}
.side-nav{display:flex;flex-direction:column;gap:4px}
.side-link{
  position:relative;display:flex;align-items:center;gap:11px;height:44px;
  padding:0 14px;border-radius:10px;font-size:14.5px;color:var(--ink-2);
  transition:background .2s var(--ease),color .2s var(--ease);
}
.side-link i{font-size:17px;flex:0 0 20px;text-align:center}
.side-link:hover{background:var(--brand-soft);color:var(--brand)}
.side-link.active{background:var(--brand-soft);color:var(--brand);font-weight:600}
.side-link.active::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:3px;height:20px;border-radius:2px;background:var(--accent);
}
.side-divider{height:1px;background:var(--line);margin:20px 8px}
.side-cta{
  margin:0 4px;padding:18px;border-radius:var(--r-md);
  background:var(--brand-soft);border:1px solid #D7E4EE;
}
.side-cta p{font-size:13px;line-height:1.7;color:var(--ink-2);margin:0 0 12px}
.side-cta strong{display:block;font-size:14.5px;color:var(--ink);margin-bottom:6px;font-weight:600}
.side-foot{margin-top:auto;padding:18px 10px 0;font-size:11.5px;color:var(--ink-3);line-height:1.7}
.side-foot span{display:block}

.mobile-topbar{
  display:none;position:fixed;top:0;left:0;right:0;height:60px;z-index:1041;
  background:#fff;border-bottom:1px solid var(--line);align-items:center;justify-content:space-between;padding:0 16px;
}
.mobile-topbar .brand{padding:0}
.mobile-topbar .brand-mark{width:32px;height:32px;flex:0 0 32px;font-size:16px;border-radius:9px}
.mobile-topbar .brand-text{font-size:16px}
.nav-toggle{
  width:42px;height:42px;border:1px solid var(--line);background:#fff;border-radius:10px;
  display:flex;align-items:center;justify-content:center;font-size:19px;color:var(--ink);cursor:pointer;
}
.sidebar-scrim{position:fixed;inset:0;background:rgba(15,30,46,.5);opacity:0;pointer-events:none;transition:opacity .25s var(--ease);z-index:1035}

.app-content{padding-left:var(--sidebar-w);min-height:100vh}

/* ---------- Buttons ---------- */
.btn-accent,.btn-brand,.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:10px;font-size:15px;font-weight:600;
  border:1px solid transparent;cursor:pointer;white-space:nowrap;
  transition:background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),transform .22s var(--ease),box-shadow .22s var(--ease);
}
.btn-accent{background:var(--accent);color:#241704;box-shadow:0 10px 22px -14px rgba(217,143,43,.9)}
.btn-accent:hover{background:#E29F3D;color:#241704;transform:translateY(-1px)}
.btn-brand{background:var(--brand);color:#fff}
.btn-brand:hover{background:var(--brand-deep);color:#fff;transform:translateY(-1px)}
.btn-ghost{background:#fff;border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}
.btn-lg-x{height:52px;padding:0 28px;font-size:15.5px}
.btn-block{width:100%}

/* ---------- Common ---------- */
.section{padding:88px 0}
.section-tight{padding:64px 0}
.section-head{display:flex;justify-content:space-between;align-items:flex-end;gap:24px;margin-bottom:40px;flex-wrap:wrap}
.section-head h2{font-size:clamp(24px,2.4vw,32px);line-height:1.3}
.section-head h2::before{
  content:"";display:block;width:24px;height:3px;border-radius:2px;background:var(--accent);margin-bottom:16px;
}
.section-head .lead{font-size:14.5px;color:var(--ink-2);margin:8px 0 0;max-width:620px}
.section-link{font-size:14px;font-weight:600;color:var(--brand);display:inline-flex;align-items:center;gap:6px}
.section-link:hover{gap:10px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;letter-spacing:.04em;
  color:var(--brand);background:var(--brand-soft);border-radius:var(--pill);padding:6px 14px;margin-bottom:20px;
}
.badge-soft{display:inline-flex;align-items:center;font-size:12.5px;padding:4px 11px;border-radius:var(--pill);background:var(--brand-soft);color:var(--brand);font-weight:500}
.badge-teal{color:var(--teal);background:rgba(31,138,138,.1)}
.badge-accent{color:#8A5A10;background:var(--accent-soft)}
.tag{
  display:inline-flex;align-items:center;font-size:12.5px;color:var(--ink-2);
  border:1px solid var(--line);background:#fff;border-radius:var(--pill);padding:4px 12px;
}
.num{font-variant-numeric:tabular-nums}

/* ---------- Hero ---------- */
.hero{position:relative;padding:84px 0 76px;background:linear-gradient(180deg,#FFFFFF 0%,#F5F7FA 100%);overflow:hidden}
.hero::after{
  content:"";position:absolute;right:-140px;top:-120px;width:460px;height:460px;border-radius:50%;
  background:radial-gradient(circle,rgba(20,71,107,.07) 0%,rgba(20,71,107,0) 68%);
}
.hero-title{font-size:clamp(30px,4vw,50px);line-height:1.18;font-weight:700;letter-spacing:-.01em;max-width:560px}
.hero-sub{font-size:17px;color:var(--ink-2);margin:18px 0 30px;max-width:520px;line-height:1.8}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:28px}
.hero-points{display:flex;flex-wrap:wrap;gap:10px 22px}
.hero-points li{font-size:14px;color:var(--ink-2);display:flex;align-items:center;gap:7px}
.hero-points i{color:var(--accent);font-size:15px}
.hero-visual{position:relative;padding:0 0 10px}
.hero-visual>img{width:100%;aspect-ratio:3/2;object-fit:cover;border-radius:var(--r-lg);box-shadow:var(--sh-3)}
.hero-badge{
  position:absolute;background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  padding:10px 15px;box-shadow:var(--sh-2);display:flex;flex-direction:column;gap:1px;
}
.hero-badge strong{font-size:19px;line-height:1.2;color:var(--brand);font-variant-numeric:tabular-nums}
.hero-badge span{font-size:12px;color:var(--ink-3)}
.hero-badge.b1{left:-14px;top:34px}
.hero-badge.b2{right:-10px;top:50%;transform:translateY(-50%)}
.hero-badge.b3{left:34px;bottom:-16px}

/* ---------- Trust ---------- */
.trust-bar{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  display:grid;grid-template-columns:repeat(4,1fr);padding:26px 10px;
}
.trust-item{padding:0 20px;border-right:1px solid var(--line);display:flex;gap:12px;align-items:flex-start}
.trust-item:last-child{border-right:0}
.trust-item i{font-size:20px;color:var(--brand);margin-top:2px}
.trust-item strong{display:block;font-size:15px;font-weight:600;margin-bottom:2px}
.trust-item span{font-size:13px;color:var(--ink-3);line-height:1.6}

/* ---------- Feature ---------- */
.feature-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:24px}
.feat-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:30px;box-shadow:var(--sh-2);transition:transform .24s var(--ease),box-shadow .24s var(--ease);
  display:flex;flex-direction:column;
}
.feat-card:hover{transform:translateY(-4px);box-shadow:var(--sh-3)}
.feat-main{grid-row:1 / span 2;padding:0;overflow:hidden}
.feat-main .feat-media{aspect-ratio:16/9;overflow:hidden;background:var(--brand-soft)}
.feat-main .feat-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease)}
.feat-main:hover .feat-media img{transform:scale(1.04)}
.feat-main .feat-body{padding:28px 30px 30px}
.feat-num{
  font-size:13px;font-weight:700;color:var(--accent);letter-spacing:.08em;
  font-variant-numeric:tabular-nums;margin-bottom:12px;display:block;
}
.feat-card h3{font-size:20px;margin-bottom:12px}
.feat-card p{font-size:14.5px;color:var(--ink-2);line-height:1.85;margin:0 0 16px}
.feat-list li{font-size:14px;color:var(--ink-2);padding-left:20px;position:relative;margin-bottom:8px}
.feat-list li::before{
  content:"";position:absolute;left:0;top:.72em;width:6px;height:6px;border-radius:50%;background:var(--accent);
}
.feat-main .feat-list{margin-top:4px;columns:2;column-gap:24px}

/* ---------- Scene ---------- */
.scene{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;padding:44px 0;border-bottom:1px solid var(--line)}
.scene:last-child{border-bottom:0;padding-bottom:0}
.scene:first-child{padding-top:0}
.scene.reverse .scene-media{order:2}
.scene-media img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-lg);box-shadow:var(--sh-2)}
.scene-tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px}
.scene-body h3{font-size:22px;margin-bottom:14px}
.scene-body p{color:var(--ink-2);font-size:15px;line-height:1.85}
.check-list{margin-top:16px}
.check-list li{font-size:14.5px;color:var(--ink-2);display:flex;gap:9px;align-items:flex-start;margin-bottom:9px}
.check-list i{color:var(--teal);font-size:15px;margin-top:5px}

/* ---------- News ---------- */
.news-card{
  height:100%;display:flex;flex-direction:column;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;
  transition:transform .24s var(--ease),box-shadow .24s var(--ease);
}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--sh-3)}
.news-cover{display:block;aspect-ratio:16/9;overflow:hidden;background:var(--brand-soft)}
.news-cover img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease)}
.news-card:hover .news-cover img{transform:scale(1.04)}
.news-body{padding:22px;display:flex;flex-direction:column;flex:1 1 auto}
.news-title{font-size:17px;line-height:1.55;margin:12px 0 10px;font-weight:600;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-title a{color:var(--ink)}
.news-title a:hover{color:var(--brand)}
.news-excerpt{
  font-size:13.8px;color:var(--ink-2);line-height:1.75;margin:0 0 18px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-meta{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:12.5px;color:var(--ink-3);border-top:1px solid var(--line);padding-top:14px}
.news-more{font-size:13px;font-weight:600;color:var(--brand);display:inline-flex;align-items:center;gap:5px}
.empty-state{text-align:center;padding:48px 20px;border:1px dashed var(--line);border-radius:var(--r-lg);background:#fff}
.empty-state i{font-size:34px;color:var(--ink-3);display:block;margin-bottom:14px}
.empty-state p{color:var(--ink-2);font-size:15px;margin-bottom:18px}

/* ---------- Proof ---------- */
.proof-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-bottom:36px}
.quote-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:28px;box-shadow:var(--sh-1)}
.quote-card i{font-size:26px;color:var(--accent);display:block;margin-bottom:12px}
.quote-card p{font-size:15px;color:var(--ink-2);line-height:1.85;margin-bottom:16px}
.quote-card cite{font-style:normal;font-size:13.5px;color:var(--ink);font-weight:600}
.partner-strip{
  display:flex;flex-wrap:wrap;gap:14px 34px;align-items:center;justify-content:space-between;
  padding:22px 26px;border:1px solid var(--line);border-radius:var(--r-md);background:#fff;margin-bottom:36px;
}
.partner-strip span{font-size:14px;color:var(--ink-3);letter-spacing:.06em;font-weight:600}
.stat-row{
  display:grid;grid-template-columns:repeat(4,1fr);gap:20px;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--r-lg);padding:30px 20px;text-align:center;
}
.stat-row .stat{position:relative;padding:0 12px}
.stat-row .stat+.stat::before{content:"";position:absolute;left:0;top:14%;height:72%;width:1px;background:var(--line)}
.stat-row strong{display:block;font-size:clamp(24px,2.6vw,32px);color:var(--brand);font-variant-numeric:tabular-nums;line-height:1.2}
.stat-row span{font-size:13px;color:var(--ink-3)}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:900px}
.accordion-item{background:transparent;border:0;border-bottom:1px solid var(--line)}
.accordion-button{
  background:transparent;color:var(--ink);font-size:16.5px;font-weight:600;padding:22px 0;
  box-shadow:none!important;border-radius:0!important;
}
.accordion-button:not(.collapsed){color:var(--brand);background:transparent}
.accordion-button::after{
  background-image:none;content:"\F282";font-family:"bootstrap-icons";font-size:18px;color:var(--ink-3);
  width:auto;height:auto;transition:transform .25s var(--ease);
}
.accordion-button:not(.collapsed)::after{transform:rotate(180deg);color:var(--brand)}
.accordion-body{padding:0 0 24px;font-size:14.8px;color:var(--ink-2);line-height:1.85;max-width:820px}

/* ---------- CTA band ---------- */
.cta-band{
  border-radius:var(--r-lg);padding:56px 48px;color:#fff;position:relative;overflow:hidden;
  background-image:linear-gradient(rgba(12,49,80,.93),rgba(12,49,80,.93)),url(/assets/images/backpic/back-2.webp);
  background-size:cover;background-position:center;
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
}
.cta-band h2{color:#fff;font-size:clamp(23px,2.4vw,30px);margin-bottom:12px}
.cta-band p{color:rgba(255,255,255,.78);font-size:15px;margin:0;max-width:560px}

/* ---------- Fixed CTA ---------- */
.float-cta{
  position:fixed;right:28px;bottom:28px;z-index:1030;display:flex;align-items:center;gap:10px;
  background:#fff;border:1px solid var(--line);border-radius:var(--pill);padding:8px 8px 8px 18px;
  box-shadow:var(--sh-3);opacity:0;transform:translateY(14px);pointer-events:none;
  transition:opacity .3s var(--ease),transform .3s var(--ease);
}
.float-cta.is-on{opacity:1;transform:translateY(0);pointer-events:auto}
.float-cta span{font-size:13.5px;color:var(--ink-2)}
.mobile-cta-bar{display:none}

/* ---------- Footer ---------- */
.site-footer{background:var(--surface);border-top:1px solid var(--line);margin-top:24px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:36px;padding:64px 0 48px}
.footer-brand .brand{padding:0 0 16px}
.footer-brand p{font-size:13.8px;color:var(--ink-2);line-height:1.85;max-width:320px}
.footer-col h4{font-size:14.5px;margin-bottom:18px;font-weight:600}
.footer-col li{margin-bottom:11px}
.footer-col a{font-size:13.8px;color:var(--ink-2)}
.footer-col a:hover{color:var(--brand)}
.footer-col .contact-line{font-size:13.8px;color:var(--ink-2);display:flex;gap:9px;align-items:flex-start;margin-bottom:11px}
.footer-col .contact-line i{color:var(--brand);margin-top:4px}
.footer-bottom{
  border-top:1px solid var(--line);padding:20px 0;display:flex;justify-content:space-between;
  align-items:center;gap:16px;flex-wrap:wrap;font-size:12.5px;color:var(--ink-3);
}
.footer-bottom a{color:var(--ink-3)}
.footer-bottom a:hover{color:var(--brand)}

/* ---------- Reveal ---------- */
.reveal{animation:fadeUp .5s var(--ease) both}
@keyframes fadeUp{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}

/* ---------- Responsive ---------- */
@media (max-width:1399.98px){
  .hero-badge.b1{left:0}
  .hero-badge.b2{right:0}
}
@media (min-width:992px) and (max-width:1199.98px){
  :root{--sidebar-w:76px}
  .app-sidebar{padding:22px 12px}
  .brand{justify-content:center;padding:0 0 20px}
  .brand-text,.brand-sub{display:none}
  .side-link{justify-content:center;padding:0;gap:0}
  .side-link span{display:none}
  .side-link i{flex:none}
  .side-link::after{
    content:attr(data-label);position:absolute;left:calc(100% + 14px);top:50%;transform:translateY(-50%);
    background:var(--ink);color:#fff;font-size:13px;font-weight:400;padding:6px 11px;border-radius:7px;
    white-space:nowrap;opacity:0;pointer-events:none;transition:opacity .18s var(--ease);z-index:20;
  }
  .side-link:hover::after{opacity:1}
  .side-cta,.side-foot{display:none}
  .side-divider{margin:16px 6px}
}
@media (max-width:991.98px){
  .mobile-topbar{display:flex}
  .app-sidebar{
    transform:translateX(-100%);width:82vw;max-width:320px;box-shadow:var(--sh-3);
    transition:transform .3s var(--ease);padding-top:26px;
  }
  .app-sidebar.open{transform:translateX(0)}
  .sidebar-scrim.show{opacity:1;pointer-events:auto}
  .app-content{padding-left:0;padding-top:60px;padding-bottom:88px}
  .section{padding:64px 0}
  .section-tight{padding:52px 0}
  .hero{padding:56px 0 52px}
  .feature-grid{grid-template-columns:1fr}
  .feat-main{grid-row:auto}
  .feat-main .feat-list{columns:1}
  .trust-bar{grid-template-columns:repeat(2,1fr);gap:22px 0;padding:24px 6px}
  .trust-item:nth-child(2n){border-right:0}
  .scene{grid-template-columns:1fr;gap:26px;padding:36px 0}
  .scene.reverse .scene-media{order:0}
  .proof-grid{grid-template-columns:1fr}
  .stat-row{grid-template-columns:repeat(2,1fr);gap:26px 0}
  .stat-row .stat:nth-child(3)::before{display:none}
  .cta-band{padding:40px 26px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;padding:52px 0 36px}
  .footer-brand{grid-column:1 / -1}
  .float-cta{display:none}
  .mobile-cta-bar{
    display:flex;position:fixed;left:0;right:0;bottom:0;height:64px;z-index:1032;
    background:#fff;border-top:1px solid var(--line);padding:8px 14px;gap:10px;align-items:center;
  }
  .mobile-cta-bar .btn-accent,.mobile-cta-bar .btn-ghost{flex:1 1 0;height:48px;padding:0 10px;font-size:14px}
}
@media (max-width:575.98px){
  .container,.container-lg,.container-xl{padding-left:16px;padding-right:16px}
  .section{padding:52px 0}
  .hero-sub{font-size:15.5px}
  .hero-actions .btn-accent,.hero-actions .btn-ghost{width:100%}
  .hero-badge{padding:8px 12px}
  .hero-badge strong{font-size:16px}
  .hero-badge.b3{left:12px;bottom:-12px}
  .trust-bar{grid-template-columns:1fr;gap:18px}
  .trust-item{border-right:0!important;padding:0 14px}
  .stat-row{grid-template-columns:1fr}
  .stat-row .stat+.stat::before{display:none}
  .footer-grid{grid-template-columns:1fr}
  .cta-band{padding:34px 22px}
  .section-head{margin-bottom:28px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}
}

/* roulang page: article */
:root{
  --bg:#F5F7FA; --surface:#FFFFFF; --ink:#0F1E2E; --ink-2:#47586C; --ink-3:#8593A5;
  --line:#E4EAF1; --brand:#14476B; --brand-deep:#0C3150; --brand-soft:#E8F0F6;
  --accent:#D98F2B; --accent-soft:#FBF2E3; --accent-ink:#241704;
  --teal:#1F8A8A; --teal-soft:#E6F3F3; --danger:#C0392B;
  --r-sm:8px; --r-md:12px; --r-lg:18px; --r-pill:999px;
  --sh-1:0 1px 2px rgba(15,30,46,.05);
  --sh-2:0 4px 12px -6px rgba(15,30,46,.12);
  --sh-3:0 18px 40px -24px rgba(15,30,46,.28);
  --ease:cubic-bezier(.2,.6,.3,1);
  --side:248px;
  --bs-primary:#14476B; --bs-primary-rgb:20,71,107;
  --bs-body-color:#0F1E2E; --bs-body-bg:#F5F7FA; --bs-border-color:#E4EAF1;
  --bs-link-color:#14476B; --bs-link-hover-color:#0C3150; --bs-link-decoration:none;
  --bs-font-sans-serif:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;line-height:1.8;letter-spacing:0;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block}
a{color:var(--brand);text-decoration:none;transition:color .24s var(--ease)}
a:hover{color:var(--brand-deep)}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4,h5{margin:0;font-weight:700;letter-spacing:-.01em;color:var(--ink)}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid rgba(217,143,43,.6);outline-offset:2px}
.container{width:100%;max-width:1180px;margin:0 auto;padding:0 24px}

/* ============ 侧边导航 App Shell ============ */
.app-shell{
  position:fixed;top:0;left:0;bottom:0;width:var(--side);
  background:var(--surface);border-right:1px solid var(--line);
  padding:20px 16px 18px;display:flex;flex-direction:column;gap:16px;
  overflow-y:auto;z-index:1040;
}
.shell-head{display:flex;align-items:center;padding:2px 4px 12px;border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:11px;color:var(--ink)}
.brand:hover{color:var(--ink)}
.brand-mark{
  width:38px;height:38px;border-radius:11px;flex:none;display:grid;place-items:center;
  background:linear-gradient(140deg,#1B5B87,#0C3150);color:#fff;font-size:19px;box-shadow:var(--sh-2);
}
.brand-text{display:block;font-size:17px;font-weight:700;line-height:1.2;letter-spacing:-.01em}
.brand-sub{display:block;font-size:11.5px;color:var(--ink-3);margin-top:3px;letter-spacing:.02em}
.side-nav{display:flex;flex-direction:column;gap:4px}
.side-link{
  position:relative;display:flex;align-items:center;gap:11px;height:44px;padding:0 12px;
  border-radius:10px;color:var(--ink-2);font-size:14.5px;font-weight:500;
  transition:background .24s var(--ease),color .24s var(--ease);
}
.side-link i{font-size:17px;width:20px;text-align:center;flex:none;color:var(--ink-3);transition:color .24s var(--ease)}
.side-link:hover{background:var(--brand-soft);color:var(--brand)}
.side-link:hover i{color:var(--brand)}
.side-link.active{background:var(--brand-soft);color:var(--brand);font-weight:600}
.side-link.active i{color:var(--brand)}
.side-link.active::before{
  content:"";position:absolute;left:0;top:11px;bottom:11px;width:3px;
  border-radius:2px;background:var(--accent);
}
.side-cta{
  margin-top:auto;background:linear-gradient(160deg,#F7FAFC,#E8F0F6);
  border:1px solid var(--line);border-radius:var(--r-md);padding:16px;
}
.side-cta-title{font-size:14px;font-weight:700;color:var(--brand);line-height:1.5}
.side-cta-desc{font-size:12.5px;color:var(--ink-2);line-height:1.7;margin-top:6px}
.side-cta .btn{width:100%;margin-top:12px}
.side-foot{font-size:11.5px;color:var(--ink-3);line-height:1.7;padding:0 4px}
.top-bar{display:none}
.nav-mask{
  position:fixed;inset:0;background:rgba(15,30,46,.5);opacity:0;visibility:hidden;
  transition:opacity .3s var(--ease),visibility .3s var(--ease);z-index:1035;
}

/* ============ 主内容区 ============ */
.main-wrap{padding-left:var(--side);min-height:100vh;display:flex;flex-direction:column}
.read-progress{position:fixed;top:0;left:var(--side);right:0;height:3px;z-index:1045;pointer-events:none}
.read-progress span{display:block;height:100%;width:0;background:var(--accent);transition:width .1s linear}

/* ============ 按钮 / 徽章 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:10px;border:1px solid transparent;
  font-size:15px;font-weight:600;line-height:1;cursor:pointer;
  transition:background .24s var(--ease),color .24s var(--ease),border-color .24s var(--ease),transform .24s var(--ease),box-shadow .24s var(--ease);
}
.btn-sm{height:40px;padding:0 18px;font-size:14px;border-radius:9px}
.btn-primary{background:var(--brand);border-color:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-deep);border-color:var(--brand-deep);color:#fff;transform:translateY(-1px)}
.btn-accent{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
.btn-accent:hover{background:#E39C36;border-color:#E39C36;color:var(--accent-ink);transform:translateY(-1px)}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--ink-2)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}
.btn:focus-visible{outline:2px solid rgba(217,143,43,.55);outline-offset:2px}
.badge-cat{
  display:inline-flex;align-items:center;gap:6px;padding:5px 12px;border-radius:var(--r-pill);
  background:var(--brand-soft);color:var(--brand);font-size:12.5px;font-weight:600;line-height:1.4;
}
.badge-soft{background:var(--teal-soft);color:var(--teal)}
.badge-accent{background:var(--accent-soft);color:#8A5A12}

/* ============ 面包屑 ============ */
.crumb{
  display:flex;align-items:center;flex-wrap:wrap;gap:8px;
  font-size:13px;color:var(--ink-3);padding:26px 0 0;
}
.crumb a{color:var(--ink-3)}
.crumb a:hover{color:var(--brand)}
.crumb .sep{color:#C7D1DC}
.crumb .cur{color:var(--ink-2);max-width:min(560px,70vw);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ============ 文章头 ============ */
.article-wrap{padding:22px 0 88px}
.article-grid{display:grid;grid-template-columns:minmax(0,1fr);gap:40px}
.article-main{min-width:0}
.article-head{padding-bottom:26px;border-bottom:1px solid var(--line);margin-bottom:30px}
.article-head h1{
  font-size:clamp(26px,3.3vw,40px);line-height:1.25;font-weight:700;
  letter-spacing:-.01em;margin:16px 0 18px;color:var(--ink);
}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px 22px;font-size:13px;color:var(--ink-3)}
.meta-row span{display:inline-flex;align-items:center;gap:6px}
.meta-row i{font-size:14px;color:#A9B6C4}
.meta-row .author{color:var(--ink-2)}
.meta-div{width:1px;height:12px;background:var(--line)}

/* ============ 正文 ============ */
.article-body{max-width:760px;font-size:16.5px;line-height:1.85;color:#26374A;font-variant-numeric:tabular-nums}
.article-body p{margin:0 0 1.05em}
.article-body h2{
  position:relative;font-size:clamp(20px,2.2vw,25px);line-height:1.42;
  margin:2.1em 0 .75em;padding-left:15px;color:var(--ink);
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.3em;width:3px;height:18px;border-radius:2px;background:var(--accent);
}
.article-body h3{font-size:19px;line-height:1.5;margin:1.7em 0 .6em;color:var(--ink);font-weight:650}
.article-body h4{font-size:17px;margin:1.4em 0 .5em;color:var(--ink);font-weight:650}
.article-body ul,.article-body ol{padding-left:1.35em;margin:0 0 1.15em}
.article-body ul li{list-style:disc}
.article-body ol li{list-style:decimal}
.article-body li{margin:.42em 0}
.article-body li::marker{color:var(--accent)}
.article-body a{color:var(--brand);border-bottom:1px solid rgba(20,71,107,.28)}
.article-body a:hover{border-bottom-color:var(--brand)}
.article-body img{border-radius:12px;margin:1.5em auto;box-shadow:var(--sh-2)}
.article-body figure{margin:1.5em 0}
.article-body figcaption,.article-body .caption{
  font-size:13px;color:var(--ink-3);text-align:center;margin-top:10px;line-height:1.6;
}
.article-body blockquote{
  margin:1.5em 0;padding:16px 22px;background:var(--brand-soft);
  border-left:3px solid var(--brand);border-radius:0 var(--r-md) var(--r-md) 0;color:#2C4054;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body table{width:100%;border-collapse:collapse;margin:1.5em 0;font-size:14.5px}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 13px;text-align:left}
.article-body thead th{background:var(--brand-soft);color:var(--brand);font-weight:600}
.article-body tbody tr:nth-child(even){background:#FAFCFD}
.article-body code{background:#F0F4F8;border-radius:6px;padding:2px 6px;font-size:.92em}
.article-body hr{border:0;border-top:1px solid var(--line);margin:2em 0}

/* ============ 目录 ============ */
.article-side{display:none}
.toc{position:sticky;top:28px;padding-left:18px;border-left:1px solid var(--line)}
.toc h4{font-size:12.5px;letter-spacing:.14em;color:var(--ink-3);font-weight:600;margin-bottom:10px}
.toc-list{display:flex;flex-direction:column}
.toc-list a{
  display:block;font-size:13.5px;line-height:1.55;color:var(--ink-2);
  padding:7px 0 7px 13px;margin-left:-19px;border-left:2px solid transparent;
  transition:color .24s var(--ease),border-color .24s var(--ease);
}
.toc-list a:hover{color:var(--brand)}
.toc-list a.on{color:var(--brand);border-left-color:var(--accent);font-weight:600}

/* ============ 空态 ============ */
.empty-state{
  max-width:760px;text-align:center;padding:56px 24px;background:var(--surface);
  border:1px dashed var(--line);border-radius:var(--r-lg);
}
.empty-state i{font-size:38px;color:#B7C4D1}
.empty-state h3{font-size:19px;margin:14px 0 8px}
.empty-state p{color:var(--ink-3);font-size:14.5px;margin-bottom:20px}

/* ============ 通用区块标题 ============ */
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:26px}
.sec-head h2{position:relative;font-size:clamp(21px,2.4vw,28px);line-height:1.35;padding-left:15px}
.sec-head h2::before{
  content:"";position:absolute;left:0;top:.32em;width:3px;height:18px;border-radius:2px;background:var(--accent);
}
.sec-head p{font-size:14px;color:var(--ink-3);margin-top:8px;padding-left:15px}
.sec-link{font-size:14px;font-weight:600;white-space:nowrap;display:inline-flex;align-items:center;gap:6px}
.sec-link i{transition:transform .24s var(--ease)}
.sec-link:hover i{transform:translateX(3px)}

/* ============ 卡片 ============ */
.card-grid{display:grid;gap:24px;grid-template-columns:repeat(3,minmax(0,1fr))}
.entry-card{
  display:flex;flex-direction:column;height:100%;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;
  box-shadow:var(--sh-2);transition:transform .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease);
}
.entry-card:hover{transform:translateY(-4px);box-shadow:var(--sh-3);border-color:#D6E0EA}
.entry-thumb{aspect-ratio:16/9;overflow:hidden;background:var(--brand-soft)}
.entry-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .45s var(--ease)}
.entry-card:hover .entry-thumb img{transform:scale(1.04)}
.entry-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1}
.entry-body h3{font-size:17.5px;line-height:1.5;font-weight:650}
.entry-body h3 a{color:var(--ink)}
.entry-body h3 a:hover{color:var(--brand)}
.entry-body p{font-size:14px;color:var(--ink-2);line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.entry-foot{margin-top:auto;padding-top:12px;border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;font-size:12.5px;color:var(--ink-3)}
.entry-foot .more{font-weight:600;color:var(--brand);display:inline-flex;align-items:center;gap:5px}
.entry-card:hover .entry-foot .more i{transform:translateX(3px)}
.entry-foot .more i{transition:transform .24s var(--ease)}

/* ============ 上下篇 / 返回 ============ */
.postnav{
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;
  margin-top:54px;padding-top:28px;border-top:1px solid var(--line);
}
.postnav a{
  display:flex;align-items:center;gap:12px;padding:16px 20px;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--sh-1);
  color:var(--ink-2);font-size:14.5px;transition:border-color .24s var(--ease),transform .24s var(--ease),box-shadow .24s var(--ease);
}
.postnav a:hover{border-color:#C9D8E5;transform:translateY(-2px);box-shadow:var(--sh-2);color:var(--brand)}
.postnav a i{font-size:16px;color:var(--brand)}
.postnav .to-right{justify-content:flex-end;text-align:right}
.postnav small{display:block;font-size:12px;color:var(--ink-3);margin-bottom:3px}
.postnav strong{font-weight:600;font-size:14.5px}

/* ============ 分类入口条 ============ */
.cat-strip{margin-top:28px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:24px;box-shadow:var(--sh-1)}
.cat-strip h4{font-size:15px;margin-bottom:14px;color:var(--ink)}
.cat-chips{display:flex;flex-wrap:wrap;gap:10px}
.cat-chips a{
  display:inline-flex;align-items:center;gap:7px;padding:9px 16px;border-radius:var(--r-pill);
  background:var(--brand-soft);color:var(--brand);font-size:13.5px;font-weight:600;
  transition:background .24s var(--ease),color .24s var(--ease),transform .24s var(--ease);
}
.cat-chips a:hover{background:var(--brand);color:#fff;transform:translateY(-2px)}

/* ============ 页脚 ============ */
.site-footer{background:#0C3150;color:#C7D8E6;margin-top:auto;padding:60px 0 26px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.15fr;gap:40px}
.footer-brand .brand{color:#fff;margin-bottom:16px}
.footer-brand .brand-text{color:#fff}
.footer-brand .brand-sub{color:#8FA9BF}
.footer-brand p{font-size:13.5px;line-height:1.85;color:#A9BFD2;max-width:340px}
.footer-col h4{font-size:14.5px;color:#fff;margin-bottom:16px;font-weight:650}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{font-size:13.5px;color:#A9BFD2}
.footer-col a:hover{color:#fff}
.contact-line{display:flex;align-items:flex-start;gap:9px;font-size:13.5px;color:#A9BFD2;margin-bottom:11px;line-height:1.6}
.contact-line i{color:var(--accent);font-size:14px;margin-top:3px}
.footer-bottom{
  margin-top:44px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;font-size:12.5px;color:#8FA9BF;
}

/* ============ 断点 ============ */
@media (min-width:1200px){
  .article-grid{grid-template-columns:minmax(0,760px) 224px}
  .article-side{display:block}
}
@media (min-width:992px) and (max-width:1199.98px){
  :root{--side:76px}
  .app-shell{padding:18px 12px}
  .shell-head{justify-content:center;padding-bottom:14px}
  .brand-text-wrap,.side-cta,.side-foot{display:none}
  .side-link{justify-content:center;padding:0}
  .side-link span{
    position:absolute;left:62px;white-space:nowrap;background:var(--ink);color:#fff;
    font-size:12.5px;font-weight:500;padding:6px 10px;border-radius:8px;
    opacity:0;visibility:hidden;transition:opacity .2s var(--ease),visibility .2s var(--ease);z-index:6;
  }
  .side-link:hover span{opacity:1;visibility:visible}
  .side-link.active::before{left:2px;top:9px;bottom:9px}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:30px}
}
@media (max-width:991.98px){
  .top-bar{
    display:flex;position:fixed;top:0;left:0;right:0;height:60px;z-index:1030;
    align-items:center;justify-content:space-between;gap:12px;padding:0 16px;
    background:var(--surface);border-bottom:1px solid var(--line);box-shadow:var(--sh-1);
  }
  .top-bar .brand{gap:9px}
  .top-bar .brand-mark{width:33px;height:33px;font-size:16px;border-radius:9px}
  .top-bar .brand-text{font-size:16px}
  .top-actions{display:flex;align-items:center;gap:10px}
  .nav-toggle{
    width:42px;height:42px;border-radius:10px;border:1px solid var(--line);
    background:var(--surface);color:var(--brand);font-size:20px;display:grid;place-items:center;
  }
  .nav-toggle:hover{background:var(--brand-soft)}
  .app-shell{
    width:82vw;max-width:320px;transform:translateX(-100%);
    transition:transform .3s var(--ease);box-shadow:var(--sh-3);
  }
  body.nav-open .app-shell{transform:none}
  body.nav-open .nav-mask{opacity:1;visibility:visible}
  .main-wrap{padding-left:0;padding-top:60px}
  .read-progress{left:0;top:60px}
  .container{padding:0 16px}
  .article-wrap{padding:16px 0 60px}
  .article-body{font-size:16px;line-height:1.8}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
  .postnav{grid-template-columns:1fr}
  .postnav .to-right{justify-content:flex-start;text-align:left}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .site-footer{padding:48px 0 22px}
}
@media (max-width:575.98px){
  .card-grid{grid-template-columns:1fr}
  .article-head h1{font-size:23px}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .footer-brand p{max-width:none}
  .sec-head{flex-direction:column;align-items:flex-start;gap:12px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;scroll-behavior:auto !important}
}

/* roulang page: category1 */
:root{
  --bg:#F5F7FA;
  --surface:#FFFFFF;
  --ink:#0F1E2E;
  --ink-2:#47586C;
  --ink-3:#8593A5;
  --line:#E4EAF1;
  --brand:#14476B;
  --brand-deep:#0C3150;
  --brand-soft:#E8F0F6;
  --accent:#D98F2B;
  --accent-soft:#FBF1E1;
  --teal:#1F8A8A;
  --teal-soft:#E6F3F3;
  --danger:#C0392B;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:18px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(15,30,46,.05);
  --sh-2:0 4px 12px -6px rgba(15,30,46,.12);
  --sh-3:0 18px 40px -24px rgba(15,30,46,.28);
  --sidebar-w:248px;
  --topbar-h:60px;
  --ease:cubic-bezier(.2,.6,.3,1);
  --bs-primary:#14476B;
  --bs-primary-rgb:20,71,107;
  --bs-link-color:#14476B;
  --bs-link-hover-color:#0C3150;
  --bs-body-color:#0F1E2E;
  --bs-body-bg:#F5F7FA;
  --bs-border-color:#E4EAF1;
  --bs-font-sans-serif:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:28px;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
h1,h2,h3,h4{line-height:1.35;font-weight:600;letter-spacing:-0.01em;}
.container{width:100%;max-width:1180px;margin:0 auto;padding:0 24px;}
.sec{padding:88px 0;}
.sec-tight{padding:64px 0;}
.sec-alt{background:var(--surface);}

/* ---------- 品牌 ---------- */
.brand{display:flex;align-items:center;gap:12px;}
.brand-mark{
  width:40px;height:40px;flex:0 0 40px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(140deg,var(--brand) 0%,var(--brand-deep) 100%);
  color:#fff;font-size:19px;
}
.brand-meta{display:flex;flex-direction:column;line-height:1.25;}
.brand-text{font-size:17px;font-weight:700;letter-spacing:.01em;color:var(--ink);}
.brand-sub{font-size:11.5px;color:var(--ink-3);letter-spacing:.06em;}

/* ---------- 侧栏 ---------- */
.sidebar{
  position:fixed;top:0;left:0;bottom:0;width:var(--sidebar-w);
  background:var(--surface);border-right:1px solid var(--line);
  padding:22px 16px;display:flex;flex-direction:column;
  overflow-y:auto;z-index:1040;
  transition:transform .28s var(--ease);
}
.side-divider{height:1px;background:var(--line);margin:18px 0 14px;}
.side-nav{display:flex;flex-direction:column;gap:4px;}
.side-label{font-size:11.5px;letter-spacing:.14em;color:var(--ink-3);padding:0 12px 8px;}
.side-link{
  position:relative;display:flex;align-items:center;gap:12px;
  height:44px;padding:0 12px;border-radius:10px;
  font-size:14.5px;color:var(--ink-2);
  transition:background-color .24s var(--ease),color .24s var(--ease);
}
.side-link i{font-size:17px;width:20px;text-align:center;color:var(--ink-3);transition:color .24s var(--ease);}
.side-link:hover{background:var(--brand-soft);color:var(--brand);}
.side-link:hover i{color:var(--brand);}
.side-link.active{background:var(--brand-soft);color:var(--brand);font-weight:600;}
.side-link.active i{color:var(--brand);}
.side-link.active::before{
  content:"";position:absolute;left:0;top:10px;bottom:10px;width:3px;
  border-radius:2px;background:var(--accent);
}
.side-cta{
  margin-top:auto;background:var(--brand-soft);border-radius:var(--r-md);
  padding:18px;border:1px solid rgba(20,71,107,.08);
}
.side-cta-title{font-size:14.5px;font-weight:600;color:var(--brand);}
.side-cta-text{font-size:12.5px;color:var(--ink-2);line-height:1.65;margin:6px 0 14px;}
.side-foot{margin-top:18px;font-size:11.5px;color:var(--ink-3);line-height:1.7;padding:0 4px;}

/* ---------- 主区 ---------- */
.main-wrap{margin-left:var(--sidebar-w);min-height:100vh;padding-bottom:0;}
.page-top{padding-top:26px;}

/* ---------- 顶部栏（移动） ---------- */
.topbar{
  display:none;position:fixed;top:0;left:0;right:0;height:var(--topbar-h);
  background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);
  align-items:center;justify-content:space-between;padding:0 16px;z-index:1035;
}
.topbar .brand-mark{width:34px;height:34px;flex:0 0 34px;font-size:16px;border-radius:10px;}
.topbar .brand-text{font-size:16px;}
.topbar-actions{display:flex;align-items:center;gap:10px;}
.hamburger{
  width:40px;height:40px;border-radius:10px;border:1px solid var(--line);
  background:var(--surface);color:var(--brand);font-size:20px;
  display:flex;align-items:center;justify-content:center;cursor:pointer;
  transition:border-color .24s var(--ease),color .24s var(--ease);
}
.hamburger:hover{border-color:var(--brand);}
.drawer-mask{
  position:fixed;inset:0;background:rgba(15,30,46,.5);
  opacity:0;visibility:hidden;transition:opacity .28s var(--ease),visibility .28s var(--ease);
  z-index:1038;
}
body.drawer-open .drawer-mask{opacity:1;visibility:visible;}
body.drawer-open{overflow:hidden;}

/* ---------- 面包屑 ---------- */
.crumb{font-size:13px;color:var(--ink-3);display:flex;align-items:center;gap:8px;flex-wrap:wrap;}
.crumb a{color:var(--ink-3);transition:color .24s var(--ease);}
.crumb a:hover{color:var(--brand);}
.crumb span.now{color:var(--ink-2);}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:10px;font-size:15px;font-weight:600;
  line-height:1;border:1px solid transparent;cursor:pointer;
  transition:background-color .24s var(--ease),color .24s var(--ease),border-color .24s var(--ease),transform .24s var(--ease),box-shadow .24s var(--ease);
}
.btn:focus-visible{outline:2px solid rgba(217,143,43,.55);outline-offset:2px;}
.btn-brand{background:var(--brand);color:#fff;}
.btn-brand:hover{background:var(--brand-deep);color:#fff;transform:translateY(-1px);}
.btn-accent{background:var(--accent);color:#241704;}
.btn-accent:hover{background:#E39E3F;color:#241704;transform:translateY(-1px);}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--ink-2);}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);}
.btn-onDark{background:rgba(255,255,255,.10);border-color:rgba(255,255,255,.55);color:#fff;}
.btn-onDark:hover{background:rgba(255,255,255,.2);color:#fff;}
.btn-sm{height:40px;padding:0 16px;font-size:14px;border-radius:9px;}
.btn-lg{height:52px;padding:0 28px;font-size:16px;}
.btn-block{width:100%;}

/* ---------- 徽章 ---------- */
.badge-soft{
  display:inline-flex;align-items:center;gap:6px;
  background:var(--brand-soft);color:var(--brand);
  font-size:12.5px;font-weight:600;padding:5px 12px;border-radius:var(--r-pill);
}
.badge-teal{background:var(--teal-soft);color:var(--teal);}
.badge-accent{background:var(--accent-soft);color:#9A6212;}

/* ---------- Hero ---------- */
.cat-hero{
  position:relative;border-radius:var(--r-lg);overflow:hidden;
  min-height:300px;display:flex;align-items:flex-end;
  padding:40px;
  background-image:linear-gradient(rgba(12,49,80,.62),rgba(12,49,80,.18)),url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
  color:#fff;box-shadow:var(--sh-3);
}
.cat-hero-inner{position:relative;z-index:2;max-width:720px;}
.cat-hero .badge-soft{background:rgba(255,255,255,.16);color:#fff;}
.cat-hero h1{
  font-size:clamp(28px,3.6vw,44px);font-weight:700;color:#fff;
  margin:14px 0 14px;letter-spacing:-0.01em;
}
.cat-hero p{font-size:16px;color:rgba(255,255,255,.88);max-width:620px;line-height:1.8;}
.cat-hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px;}

/* ---------- 数据条 ---------- */
.stat-strip{
  margin-top:34px;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-md);display:grid;grid-template-columns:repeat(4,1fr);
}
.stat-item{padding:24px 20px;border-left:1px solid var(--line);}
.stat-item:first-child{border-left:0;}
.stat-num{
  font-size:26px;font-weight:700;color:var(--brand);
  font-variant-numeric:tabular-nums;display:block;line-height:1.2;
}
.stat-num small{font-size:14px;font-weight:600;margin-left:2px;}
.stat-label{font-size:13px;color:var(--ink-2);display:block;margin-top:6px;}

/* ---------- 板块标题 ---------- */
.sec-head{max-width:720px;margin-bottom:40px;}
.sec-head .hbar{width:24px;height:2px;background:var(--line);margin-bottom:16px;}
.sec-head h2{font-size:clamp(22px,2.3vw,30px);position:relative;padding-left:16px;}
.sec-head h2::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:3px;
  border-radius:2px;background:var(--accent);
}
.sec-head p{margin-top:14px;color:var(--ink-2);font-size:15.5px;}

/* ---------- 索引区 ---------- */
.index-grid{display:grid;grid-template-columns:240px 1fr;gap:44px;align-items:start;}
.toc{
  position:sticky;top:26px;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-md);padding:18px 14px;box-shadow:var(--sh-1);
}
.toc-title{font-size:12.5px;letter-spacing:.12em;color:var(--ink-3);padding:0 10px 10px;}
.toc a{
  display:flex;align-items:center;gap:10px;padding:9px 10px;border-radius:8px;
  font-size:13.5px;color:var(--ink-2);transition:background-color .24s var(--ease),color .24s var(--ease);
}
.toc a i{font-size:12px;color:var(--ink-3);transition:color .24s var(--ease);}
.toc a:hover,.toc a.on{background:var(--brand-soft);color:var(--brand);}
.toc a:hover i,.toc a.on i{color:var(--accent);}

.row-list{border-top:1px solid var(--line);}
.row-item{
  display:flex;align-items:flex-start;gap:20px;padding:22px 6px;
  border-bottom:1px solid var(--line);
  transition:background-color .24s var(--ease),padding-left .24s var(--ease);
}
.row-item:hover{background:linear-gradient(90deg,rgba(232,240,246,.85),rgba(232,240,246,0));padding-left:14px;}
.row-idx{
  flex:0 0 34px;font-size:13.5px;font-weight:700;color:var(--accent);
  font-variant-numeric:tabular-nums;padding-top:3px;
}
.row-main{flex:1 1 auto;min-width:0;}
.row-main h3{font-size:17px;font-weight:600;color:var(--ink);}
.row-main p{font-size:14px;color:var(--ink-2);margin-top:6px;line-height:1.72;}
.row-arrow{flex:0 0 auto;color:var(--ink-3);font-size:16px;padding-top:6px;transition:transform .24s var(--ease),color .24s var(--ease);}
.row-item:hover .row-arrow{color:var(--accent);transform:translateX(4px);}

/* ---------- 图文板块 ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:center;}
.split-media img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-lg);box-shadow:var(--sh-2);}
.split-body h2{font-size:clamp(22px,2.2vw,28px);position:relative;padding-left:16px;margin-bottom:18px;}
.split-body h2::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:3px;border-radius:2px;background:var(--accent);}
.split-body p{color:var(--ink-2);font-size:15.5px;margin-bottom:14px;}
.tick-list{margin-top:20px;display:flex;flex-direction:column;gap:12px;}
.tick-list li{display:flex;gap:12px;font-size:15px;color:var(--ink-2);}
.tick-list li i{color:var(--teal);font-size:16px;flex:0 0 auto;padding-top:4px;}

/* ---------- 流程 ---------- */
.flow-list{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1px solid var(--line);}
.flow-item{padding:28px 24px 8px;border-right:1px solid var(--line);position:relative;}
.flow-item:last-child{border-right:0;}
.flow-item::before{
  content:"";position:absolute;top:-1px;left:0;width:44px;height:3px;
  background:var(--accent);border-radius:0 2px 2px 0;
}
.flow-num{
  font-size:13px;font-weight:700;color:var(--accent);letter-spacing:.08em;
  font-variant-numeric:tabular-nums;display:block;margin-bottom:12px;
}
.flow-item h3{font-size:16.5px;margin-bottom:10px;}
.flow-item p{font-size:14px;color:var(--ink-2);line-height:1.72;}

/* ---------- 场景卡 ---------- */
.scene-grid{display:grid;grid-template-columns:1.15fr 1fr;gap:24px;}
.scene-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  overflow:hidden;box-shadow:var(--sh-2);
  transition:box-shadow .24s var(--ease),transform .24s var(--ease);
}
.scene-card:hover{box-shadow:var(--sh-3);transform:translateY(-4px);}
.scene-card-lead{grid-row:1 / span 2;display:flex;flex-direction:column;}
.scene-media{overflow:hidden;}
.scene-card-lead .scene-media img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.scene-card-sm{display:grid;grid-template-columns:150px 1fr;}
.scene-card-sm .scene-media img{width:100%;height:100%;min-height:150px;object-fit:cover;}
.scene-body{padding:24px;}
.scene-body h3{font-size:17.5px;margin:12px 0 10px;}
.scene-body p{font-size:14.5px;color:var(--ink-2);line-height:1.75;}
.scene-card-lead .scene-body{margin-top:auto;}

/* ---------- FAQ ---------- */
.faq{max-width:860px;}
.faq .accordion{border-top:1px solid var(--line);}
.faq .accordion-item{background:transparent;border:0;border-bottom:1px solid var(--line);}
.faq .accordion-button{
  background:transparent;color:var(--ink);font-size:16.5px;font-weight:600;
  padding:22px 44px 22px 0;box-shadow:none;
}
.faq .accordion-button:not(.collapsed){color:var(--brand);background:transparent;box-shadow:none;}
.faq .accordion-button:focus{box-shadow:none;border-color:transparent;}
.faq .accordion-button::after{
  width:16px;height:16px;background-size:16px;margin-left:auto;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M2 5.4 8 11.4l6-6' fill='none' stroke='%2347586C' stroke-width='1.7' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  transition:transform .24s var(--ease);
}
.faq .accordion-button:not(.collapsed)::after{
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M2 5.4 8 11.4l6-6' fill='none' stroke='%23D98F2B' stroke-width='1.7' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  transform:rotate(180deg);
}
.faq .accordion-body{padding:0 44px 24px 0;color:var(--ink-2);font-size:15px;line-height:1.8;}

/* ---------- CTA 带 ---------- */
.cta-band{
  background:linear-gradient(135deg,var(--brand-deep) 0%,var(--brand) 100%);
  border-radius:var(--r-lg);padding:56px;color:#fff;position:relative;overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;right:-60px;top:-60px;width:260px;height:260px;
  border-radius:50%;background:rgba(217,143,43,.14);
}
.cta-inner{position:relative;z-index:2;max-width:660px;}
.cta-band h2{font-size:clamp(22px,2.4vw,30px);color:#fff;margin-bottom:14px;}
.cta-band p{color:rgba(255,255,255,.86);font-size:15.5px;margin-bottom:28px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;}

/* ---------- 悬浮 CTA / 移动底栏 ---------- */
.float-cta{
  position:fixed;right:28px;bottom:28px;z-index:1030;
  display:inline-flex;align-items:center;gap:8px;
  height:50px;padding:0 22px;border-radius:var(--r-pill);
  background:var(--accent);color:#241704;font-size:15px;font-weight:600;
  box-shadow:var(--sh-3);transition:background-color .24s var(--ease),transform .24s var(--ease);
}
.float-cta:hover{background:#E39E3F;transform:translateY(-2px);}
.mobile-cta{
  display:none;position:fixed;left:0;right:0;bottom:0;height:64px;z-index:1036;
  background:rgba(255,255,255,.98);border-top:1px solid var(--line);
  align-items:center;gap:10px;padding:0 14px;
}
.mobile-cta .btn{flex:1 1 auto;}
.mobile-cta .btn-ghost{flex:0 0 112px;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--surface);border-top:1px solid var(--line);padding:64px 0 0;margin-top:88px;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:44px;}
.footer-brand p{font-size:14px;color:var(--ink-2);margin-top:18px;line-height:1.8;max-width:360px;}
.footer-col h4{font-size:14.5px;color:var(--ink);margin-bottom:16px;}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col ul a{font-size:14px;color:var(--ink-2);transition:color .24s var(--ease);}
.footer-col ul a:hover{color:var(--brand);}
.contact-line{display:flex;align-items:center;gap:10px;font-size:14px;color:var(--ink-2);margin-bottom:12px;}
.contact-line i{color:var(--brand);font-size:15px;}
.footer-bottom{
  border-top:1px solid var(--line);padding:20px 0;display:flex;
  justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:12.5px;color:var(--ink-3);
}

/* ---------- 响应式 ---------- */
@media (max-width:1399px){
  .sec{padding:76px 0;}
}
@media (min-width:992px) and (max-width:1199px){
  :root{--sidebar-w:76px;}
  .sidebar{padding:20px 10px;align-items:center;}
  .brand-meta,.side-label,.side-cta,.side-foot{display:none;}
  .side-link{justify-content:center;padding:0;gap:0;}
  .side-link span{display:none;}
  .side-link:hover::after{
    content:attr(data-label);position:absolute;left:calc(100% + 12px);top:50%;
    transform:translateY(-50%);background:var(--ink);color:#fff;
    font-size:12.5px;font-weight:400;padding:7px 12px;border-radius:8px;
    white-space:nowrap;z-index:1060;
  }
}
@media (max-width:1199px){
  .split{gap:36px;}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:32px;}
}
@media (max-width:991px){
  .sidebar{width:min(82vw,320px);transform:translateX(-100%);z-index:1050;padding:22px 16px;}
  body.drawer-open .sidebar{transform:translateX(0);}
  .topbar{display:flex;}
  .main-wrap{margin-left:0;padding-top:var(--topbar-h);padding-bottom:88px;}
  .float-cta{display:none;}
  .mobile-cta{display:flex;}
  html{scroll-padding-top:74px;}
  .sec{padding:64px 0;}
  .cat-hero{padding:28px;min-height:320px;}
  .index-grid{grid-template-columns:1fr;gap:28px;}
  .toc{position:static;}
  .split{grid-template-columns:1fr;gap:28px;}
  .split-media{order:-1;}
  .flow-list{grid-template-columns:1fr 1fr;}
  .flow-item{border-right:0;border-bottom:1px solid var(--line);padding:26px 18px;}
  .flow-item:nth-child(odd){border-right:1px solid var(--line);}
  .scene-grid{grid-template-columns:1fr;}
  .scene-card-lead{grid-row:auto;}
  .cta-band{padding:40px 28px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .site-footer{margin-top:64px;}
}
@media (max-width:767px){
  .container{padding:0 16px;}
  .stat-strip{grid-template-columns:1fr 1fr;}
  .stat-item{padding:20px 16px;border-left:1px solid var(--line);}
  .stat-item:nth-child(odd){border-left:0;}
  .stat-item:nth-child(n+3){border-top:1px solid var(--line);}
  .flow-list{grid-template-columns:1fr;}
  .flow-item:nth-child(odd){border-right:0;}
  .scene-card-sm{grid-template-columns:1fr;}
  .scene-card-sm .scene-media img{min-height:170px;aspect-ratio:16/9;}
  .footer-grid{grid-template-columns:1fr;}
  .cat-hero{padding:24px 20px;}
  .cat-hero-actions .btn{flex:1 1 auto;}
}
@media (max-width:520px){
  .brand-sub{display:none;}
  .topbar-actions .btn-sm{display:none;}
  .row-item{gap:14px;padding:18px 2px;}
  .row-idx{flex-basis:26px;font-size:12.5px;}
  .row-main h3{font-size:15.5px;}
  .cta-actions .btn{width:100%;}
  .footer-bottom{flex-direction:column;gap:8px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important;scroll-behavior:auto!important;}
  .scene-card:hover{transform:none;}
}

/* roulang page: category2 */
:root{
  --bg:#F5F7FA;
  --surface:#FFFFFF;
  --ink:#0F1E2E;
  --ink-2:#47586C;
  --ink-3:#8593A5;
  --line:#E4EAF1;
  --brand:#14476B;
  --brand-deep:#0C3150;
  --brand-soft:#E8F0F6;
  --accent:#D98F2B;
  --accent-soft:#FBF0DD;
  --teal:#1F8A8A;
  --teal-soft:#E3F2F2;
  --danger:#C0392B;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:18px;
  --pill:999px;
  --sh-1:0 1px 2px rgba(15,30,46,.05);
  --sh-2:0 4px 12px -6px rgba(15,30,46,.12);
  --sh-3:0 18px 40px -24px rgba(15,30,46,.28);
  --ease:cubic-bezier(.2,.6,.3,1);
  --sidebar-w:248px;
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  padding-left:var(--sidebar-w);
  background:var(--bg);
  color:var(--ink);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--brand);text-decoration:none;transition:color .24s var(--ease);}
a:hover{color:var(--brand-deep);}
h1,h2,h3,h4{margin:0;color:var(--ink);letter-spacing:-.01em;}
p{margin:0 0 .9em;}
p:last-child{margin-bottom:0;}
ul{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
:focus-visible{outline:2px solid rgba(217,143,43,.55);outline-offset:2px;}
.num{font-variant-numeric:tabular-nums;}

.container{width:100%;max-width:1180px;margin:0 auto;padding-left:24px;padding-right:24px;}

/* ============ 侧边导航 ============ */
.sidebar{
  position:fixed;left:0;top:0;bottom:0;width:var(--sidebar-w);
  background:var(--surface);border-right:1px solid var(--line);
  display:flex;flex-direction:column;gap:18px;
  padding:22px 16px;z-index:1040;overflow-y:auto;
}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink);}
.brand:hover{color:var(--ink);}
.brand-mark{
  width:40px;height:40px;border-radius:12px;flex:none;
  background:linear-gradient(140deg,var(--brand) 0%,var(--brand-deep) 100%);
  color:#fff;display:flex;align-items:center;justify-content:center;font-size:19px;
  box-shadow:var(--sh-2);
}
.brand-text{display:block;font-size:18px;font-weight:700;letter-spacing:-.01em;line-height:1.2;}
.brand-sub{display:block;font-size:12px;color:var(--ink-3);letter-spacing:.02em;line-height:1.6;}
.side-brand{padding:0 6px 18px;border-bottom:1px solid var(--line);margin-bottom:2px;}
.side-nav{display:flex;flex-direction:column;gap:4px;}
.side-link{
  position:relative;height:44px;border-radius:10px;
  display:flex;align-items:center;gap:10px;padding:0 12px;
  font-size:14.5px;color:var(--ink-2);white-space:nowrap;
  transition:background .24s var(--ease),color .24s var(--ease);
}
.side-link i{font-size:17px;flex:none;}
.side-link:hover{background:var(--brand-soft);color:var(--brand);}
.side-link.active{background:var(--brand-soft);color:var(--brand);font-weight:600;}
.side-link.active::before{
  content:"";position:absolute;left:0;top:10px;bottom:10px;width:3px;
  border-radius:2px;background:var(--accent);
}
.side-cta{
  margin-top:auto;background:var(--brand-soft);border:1px solid var(--line);
  border-radius:var(--r-md);padding:16px;
}
.side-cta p{font-size:13.5px;color:var(--ink-2);line-height:1.7;margin-bottom:12px;}
.side-cta .btn{width:100%;justify-content:center;height:42px;font-size:14.5px;}
.side-foot{font-size:12px;color:var(--ink-3);line-height:1.7;padding:0 4px;}

/* ============ 顶部移动栏 ============ */
.topbar{
  display:none;position:fixed;top:0;left:0;right:0;height:60px;z-index:1050;
  background:var(--surface);border-bottom:1px solid var(--line);
  padding:0 16px;align-items:center;justify-content:space-between;gap:12px;
  box-shadow:var(--sh-1);
}
.topbar .brand-text{font-size:16px;}
.topbar .brand-sub{display:none;}
.topbar .brand-mark{width:34px;height:34px;border-radius:10px;font-size:16px;}
.topbar-actions{display:flex;align-items:center;gap:8px;}
.topbar-btn{
  width:40px;height:40px;border-radius:10px;border:1px solid var(--line);
  background:#fff;color:var(--brand);font-size:20px;display:flex;align-items:center;justify-content:center;
  transition:border-color .24s var(--ease),background .24s var(--ease);
}
.topbar-btn:hover{border-color:var(--brand);background:var(--brand-soft);}
.overlay{
  display:none;position:fixed;inset:0;background:rgba(15,30,46,.5);z-index:1070;
}
.overlay.show{display:block;}

/* ============ 按钮 ============ */
.btn{
  --bs-btn-border-radius:10px;
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:10px;font-size:15px;font-weight:600;
  border:1px solid transparent;transition:all .24s var(--ease);box-shadow:none;
}
.btn-brand{background:var(--brand);border-color:var(--brand);color:#fff;}
.btn-brand:hover,.btn-brand:focus{background:var(--brand-deep);border-color:var(--brand-deep);color:#fff;transform:translateY(-1px);}
.btn-accent{background:var(--accent);border-color:var(--accent);color:#241704;}
.btn-accent:hover,.btn-accent:focus{background:#E5A03F;border-color:#E5A03F;color:#241704;transform:translateY(-1px);}
.btn-ghost{background:#fff;border-color:var(--line);color:var(--ink);}
.btn-ghost:hover,.btn-ghost:focus{border-color:var(--brand);color:var(--brand);background:#fff;}
.btn-lg{height:52px;padding:0 28px;font-size:16px;}
.btn-sm{height:40px;padding:0 16px;font-size:14px;border-radius:10px;}

/* ============ 首屏横幅 ============ */
.page-hero{padding:40px 0 0;}
.hero-banner{
  position:relative;overflow:hidden;border-radius:var(--r-lg);
  aspect-ratio:3/1;box-shadow:var(--sh-3);background:var(--brand-deep);
}
.hero-banner img{width:100%;height:100%;object-fit:cover;}
.hero-banner::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(rgba(12,49,80,.55),rgba(12,49,80,.15));
}
.hero-inner{
  position:absolute;inset:0;z-index:2;display:flex;flex-direction:column;justify-content:center;
  padding:36px 48px;max-width:760px;color:#fff;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;align-self:flex-start;
  background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.28);
  color:#fff;font-size:12.5px;letter-spacing:.06em;border-radius:var(--pill);
  padding:5px 14px;margin-bottom:14px;
}
.hero-inner h1{
  color:#fff;font-size:clamp(30px,4vw,50px);line-height:1.18;font-weight:700;
  margin-bottom:14px;letter-spacing:-.01em;
}
.hero-inner p{color:rgba(255,255,255,.88);font-size:16px;max-width:600px;margin-bottom:22px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;}
.hero-badges{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px;}
.hero-badges span{
  display:inline-flex;align-items:center;gap:6px;font-size:12.5px;
  background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.22);
  color:#fff;border-radius:var(--pill);padding:5px 12px;
}

/* ============ 通用板块 ============ */
.section{padding:88px 0;}
.section.tight{padding-top:64px;}
.section-head{max-width:760px;margin-bottom:38px;}
.kicker{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;
  color:var(--accent);letter-spacing:.04em;margin-bottom:12px;text-transform:none;
}
.section-head h2{
  font-size:clamp(24px,2.4vw,32px);line-height:1.3;font-weight:600;margin-bottom:14px;
}
.section-head h2::before{
  content:"";display:inline-block;width:3px;height:20px;background:var(--accent);
  border-radius:2px;margin-right:12px;vertical-align:-3px;
}
.section-head p{color:var(--ink-2);font-size:15.5px;max-width:720px;}
.section-head.split{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;max-width:none;}
.more-link{font-size:14px;font-weight:600;white-space:nowrap;display:inline-flex;align-items:center;gap:6px;}
.more-link i{transition:transform .24s var(--ease);}
.more-link:hover i{transform:translateX(4px);}

/* ============ 卡片网格（首项大卡） ============ */
.card-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;}
.card-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  overflow:hidden;box-shadow:var(--sh-2);
  display:flex;flex-direction:column;
  transition:transform .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease);
}
.card-item:hover{transform:translateY(-4px);box-shadow:var(--sh-3);border-color:#D6E2EC;}
.card-item.feature{grid-column:span 2;flex-direction:row;}
.card-media{position:relative;overflow:hidden;background:var(--brand-soft);}
.card-item:not(.feature) .card-media{aspect-ratio:16/9;}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease);}
.card-item:hover .card-media img{transform:scale(1.04);}
.card-item.feature .card-media{flex:0 0 46%;min-height:320px;}
.card-body{padding:24px;display:flex;flex-direction:column;gap:12px;flex:1;}
.card-body h3{font-size:19px;font-weight:600;line-height:1.45;}
.card-item.feature .card-body{padding:32px;}
.card-item.feature .card-body h3{font-size:24px;}
.card-body p{color:var(--ink-2);font-size:14.5px;line-height:1.75;margin:0;}
.card-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;padding-top:6px;}
.card-enter{font-size:14px;font-weight:600;display:inline-flex;align-items:center;gap:6px;color:var(--brand);}
.card-enter i{transition:transform .24s var(--ease);}
.card-item:hover .card-enter i{transform:translateX(4px);}
.badge-row{display:flex;flex-wrap:wrap;gap:8px;}
.badge-pill{
  display:inline-flex;align-items:center;gap:5px;font-size:12.5px;font-weight:600;
  border-radius:var(--pill);padding:4px 12px;background:var(--brand-soft);color:var(--brand);
}
.badge-pill.teal{background:var(--teal-soft);color:var(--teal);}
.badge-pill.accent{background:var(--accent-soft);color:#9A6413;}
.meta-line{font-size:12.5px;color:var(--ink-3);display:flex;align-items:center;gap:14px;flex-wrap:wrap;}
.meta-line span{display:inline-flex;align-items:center;gap:5px;}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;}
.tag{
  font-size:12.5px;color:var(--ink-2);background:#fff;border:1px solid var(--line);
  border-radius:var(--pill);padding:4px 12px;transition:all .24s var(--ease);
}
.tag:hover{border-color:var(--brand);color:var(--brand);}

/* ============ 图文交替 ============ */
.alt-row{
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:48px;align-items:center;
  padding:36px 0;border-top:1px solid var(--line);
}
.alt-row:first-of-type{border-top:0;padding-top:0;}
.alt-row.reverse .alt-media{order:2;}
.alt-media{border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh-2);aspect-ratio:4/3;background:var(--brand-soft);}
.alt-media img{width:100%;height:100%;object-fit:cover;}
.alt-text h3{font-size:22px;font-weight:600;margin-bottom:12px;line-height:1.4;}
.alt-text p{color:var(--ink-2);font-size:15.5px;}
.alt-steps{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px;}

/* ============ 横向步骤 ============ */
.steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px;}
.step{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  padding:24px;box-shadow:var(--sh-1);transition:transform .24s var(--ease),box-shadow .24s var(--ease);
}
.step:hover{transform:translateY(-4px);box-shadow:var(--sh-2);}
.step-num{
  font-size:13px;font-weight:700;color:var(--accent);letter-spacing:.08em;margin-bottom:12px;
  display:inline-flex;align-items:center;gap:8px;
}
.step-num::after{content:"";width:22px;height:2px;background:var(--accent);border-radius:2px;opacity:.55;}
.step h3{font-size:17px;font-weight:600;margin-bottom:8px;}
.step p{font-size:14px;color:var(--ink-2);margin:0;}

/* ============ 数字条 ============ */
.stats{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:0;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  overflow:hidden;box-shadow:var(--sh-1);
}
.stat{padding:28px 24px;border-left:1px solid var(--line);}
.stat:first-child{border-left:0;}
.stat strong{display:block;font-size:30px;font-weight:700;color:var(--brand);line-height:1.2;letter-spacing:-.02em;}
.stat span{display:block;font-size:13.5px;color:var(--ink-3);margin-top:6px;}

/* ============ FAQ ============ */
.faq-wrap{max-width:820px;}
.accordion-item{border:0;border-top:1px solid var(--line);background:transparent;border-radius:0;}
.accordion-item:last-child{border-bottom:1px solid var(--line);}
.accordion-button{
  background:transparent;box-shadow:none;padding:20px 0;font-size:16px;font-weight:600;color:var(--ink);
  border-radius:0;
}
.accordion-button:not(.collapsed){color:var(--brand);background:transparent;box-shadow:none;}
.accordion-button:focus{box-shadow:none;border-color:transparent;}
.accordion-button::after{
  content:"";width:9px;height:9px;background-image:none;flex:none;
  border-right:2px solid var(--ink-3);border-bottom:2px solid var(--ink-3);
  transform:rotate(45deg);margin-left:auto;transition:transform .25s var(--ease),border-color .25s var(--ease);
}
.accordion-button:not(.collapsed)::after{transform:rotate(-135deg);border-color:var(--brand);}
.accordion-body{padding:0 0 22px;font-size:15px;color:var(--ink-2);line-height:1.8;max-width:720px;}

/* ============ CTA 带 ============ */
.cta-band{
  background:var(--brand-deep);border-radius:var(--r-lg);padding:56px 48px;
  display:flex;align-items:center;justify-content:space-between;gap:36px;flex-wrap:wrap;
  box-shadow:var(--sh-3);
}
.cta-band h2{color:#fff;font-size:clamp(22px,2.2vw,30px);line-height:1.35;margin-bottom:12px;}
.cta-band h2::before{display:none;}
.cta-band p{color:rgba(255,255,255,.78);font-size:15px;max-width:560px;margin:0;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;}
.cta-band .btn-ghost{background:transparent;border-color:rgba(255,255,255,.4);color:#fff;}
.cta-band .btn-ghost:hover{background:rgba(255,255,255,.12);border-color:#fff;color:#fff;}

/* ============ 页脚 ============ */
.site-footer{background:var(--surface);border-top:1px solid var(--line);padding:64px 0 0;margin-top:88px;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;}
.footer-brand .brand{margin-bottom:16px;}
.footer-brand p{font-size:14px;color:var(--ink-2);line-height:1.8;max-width:380px;}
.footer-col h4{font-size:15px;font-weight:600;margin-bottom:16px;}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col a{font-size:14px;color:var(--ink-2);}
.footer-col a:hover{color:var(--brand);}
.contact-line{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--ink-2);margin-bottom:12px;}
.contact-line i{color:var(--brand);font-size:15px;}
.footer-bottom{
  margin-top:48px;border-top:1px solid var(--line);padding:20px 0 24px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:12.5px;color:var(--ink-3);
}

/* ============ 悬浮 / 固定转化 ============ */
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:1030;
  display:inline-flex;align-items:center;gap:8px;height:48px;padding:0 22px;
  border-radius:var(--pill);background:var(--brand);color:#fff;font-size:14.5px;font-weight:600;
  box-shadow:var(--sh-3);transition:background .24s var(--ease),transform .24s var(--ease);
}
.float-cta:hover{background:var(--brand-deep);color:#fff;transform:translateY(-2px);}
.mobile-bar{display:none;}

/* ============ 响应式 ============ */
@media (max-width:1199.98px){
  .container{max-width:1180px;}
  .section{padding:64px 0;}
  .hero-inner{padding:28px 32px;}
  .cta-band{padding:44px 32px;}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:32px;}
  .footer-brand{grid-column:span 3;}
}
@media (min-width:992px) and (max-width:1199.98px){
  :root{--sidebar-w:76px;}
  .sidebar{padding:20px 10px;align-items:center;}
  .side-brand{padding:0 0 18px;justify-content:center;}
  .brand-text-wrap,.side-cta,.side-foot,.side-link span{display:none;}
  .side-link{justify-content:center;padding:0;width:52px;}
  .side-link::after{
    content:attr(data-label);position:absolute;left:calc(100% + 10px);top:50%;transform:translateY(-50%);
    background:var(--ink);color:#fff;font-size:12.5px;padding:5px 10px;border-radius:var(--r-sm);
    white-space:nowrap;opacity:0;pointer-events:none;transition:opacity .2s var(--ease);
  }
  .side-link:hover::after{opacity:1;}
  .stats{grid-template-columns:repeat(2,minmax(0,1fr));}
  .stat:nth-child(3){border-left:0;border-top:1px solid var(--line);}
  .stat:nth-child(4){border-top:1px solid var(--line);}
}
@media (max-width:991.98px){
  body{padding-left:0;padding-top:60px;padding-bottom:88px;}
  .topbar{display:flex;}
  .sidebar{
    width:82vw;max-width:320px;transform:translateX(-100%);
    transition:transform .3s var(--ease);box-shadow:var(--sh-3);
  }
  .sidebar.open{transform:translateX(0);}
  .side-cta{margin-top:24px;}
  .section{padding:52px 0;}
  .page-hero{padding:24px 0 0;}
  .hero-banner{aspect-ratio:auto;min-height:340px;}
  .hero-inner{position:relative;padding:28px 22px;max-width:none;}
  .hero-banner::after{background:linear-gradient(rgba(12,49,80,.72),rgba(12,49,80,.42));}
  .hero-banner img{position:absolute;inset:0;}
  .hero-inner{position:relative;z-index:2;}
  .card-grid{grid-template-columns:1fr;}
  .card-item.feature{grid-column:span 1;flex-direction:column;}
  .card-item.feature .card-media{flex:none;min-height:0;aspect-ratio:16/9;}
  .card-item.feature .card-body{padding:24px;}
  .card-item.feature .card-body h3{font-size:20px;}
  .alt-row{grid-template-columns:1fr;gap:24px;padding:28px 0;}
  .alt-row.reverse .alt-media{order:0;}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr));}
  .stats{grid-template-columns:repeat(2,minmax(0,1fr));}
  .stat:nth-child(3){border-left:0;border-top:1px solid var(--line);}
  .stat:nth-child(4){border-top:1px solid var(--line);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .footer-brand{grid-column:span 2;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;text-align:left;}
  .float-cta{display:none;}
  .mobile-bar{
    display:flex;position:fixed;left:0;right:0;bottom:0;height:64px;z-index:1035;
    background:var(--surface);border-top:1px solid var(--line);
    padding:10px 16px;gap:10px;box-shadow:0 -6px 18px -12px rgba(15,30,46,.3);
  }
  .mobile-bar .btn{flex:1;height:44px;font-size:14.5px;padding:0 12px;}
  .section-head.split{flex-direction:column;align-items:flex-start;gap:10px;}
}
@media (max-width:575.98px){
  .container{padding-left:16px;padding-right:16px;}
  body{font-size:15.5px;}
  .steps{grid-template-columns:1fr;}
  .stats{grid-template-columns:1fr;}
  .stat{border-left:0;border-top:1px solid var(--line);}
  .stat:first-child{border-top:0;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-brand{grid-column:span 1;}
  .cta-band{padding:32px 22px;border-radius:var(--r-md);}
  .footer-bottom{font-size:12px;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important;}
  .card-item:hover,.step:hover,.btn:hover{transform:none!important;}
}

/* roulang page: category3 */
:root{
  --bg:#F5F7FA;
  --surface:#FFFFFF;
  --ink:#0F1E2E;
  --ink-2:#47586C;
  --ink-3:#8593A5;
  --line:#E4EAF1;
  --brand:#14476B;
  --brand-deep:#0C3150;
  --brand-soft:#E8F0F6;
  --accent:#D98F2B;
  --teal:#1F8A8A;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:18px;
  --sh-1:0 1px 2px rgba(15,30,46,.05);
  --sh-2:0 4px 12px -6px rgba(15,30,46,.12);
  --sh-3:0 18px 40px -24px rgba(15,30,46,.28);
  --ease:cubic-bezier(.2,.6,.3,1);
  --sidebar-w:248px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--brand);text-decoration:none;transition:color .2s var(--ease)}
a:hover{color:var(--brand-deep)}
h1,h2,h3,h4{margin:0;font-weight:600;letter-spacing:-.01em;color:var(--ink)}
p{margin:0 0 .9em}
ul{margin:0;padding:0;list-style:none}
button{font-family:inherit}
:focus-visible{outline:2px solid rgba(217,143,43,.65);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:1180px;margin:0 auto;padding:0 24px}
.tnum{font-variant-numeric:tabular-nums}

/* ---------- 侧边 App Shell ---------- */
.sidebar{
  position:fixed;top:0;left:0;bottom:0;width:var(--sidebar-w);
  background:var(--surface);border-right:1px solid var(--line);
  padding:24px 16px 20px;display:flex;flex-direction:column;gap:20px;
  z-index:1045;overflow-y:auto;
}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink)}
.brand:hover{color:var(--ink)}
.brand-mark{
  width:38px;height:38px;flex:0 0 38px;border-radius:10px;
  background:linear-gradient(150deg,var(--brand),var(--brand-deep));
  color:#fff;display:grid;place-items:center;font-size:18px;
  box-shadow:var(--sh-2);
}
.brand-text{display:block;font-size:17px;font-weight:700;line-height:1.25;letter-spacing:-.01em}
.brand-sub{display:block;font-size:11.5px;color:var(--ink-3);letter-spacing:.02em}
.side-divider{height:1px;background:var(--line);margin:0 4px}
.side-nav{display:flex;flex-direction:column;gap:4px}
.side-link{
  display:flex;align-items:center;gap:12px;height:44px;padding:0 12px;
  border-radius:10px;font-size:14.5px;color:var(--ink-2);font-weight:500;
  position:relative;transition:background .2s var(--ease),color .2s var(--ease);
}
.side-link i{font-size:17px;color:var(--ink-3);transition:color .2s var(--ease)}
.side-link:hover{background:var(--brand-soft);color:var(--brand)}
.side-link:hover i{color:var(--brand)}
.side-link.active{background:var(--brand-soft);color:var(--brand);font-weight:600}
.side-link.active i{color:var(--brand)}
.side-link.active::before{
  content:"";position:absolute;left:0;top:11px;bottom:11px;width:3px;
  border-radius:999px;background:var(--accent);
}
.side-cta{
  background:linear-gradient(160deg,var(--brand),var(--brand-deep));
  border-radius:var(--r-md);padding:18px 16px;color:#fff;
}
.side-cta h3{font-size:14.5px;color:#fff;margin-bottom:6px;font-weight:600}
.side-cta p{font-size:12.5px;line-height:1.65;color:rgba(255,255,255,.78);margin:0 0 12px}
.side-cta a{
  display:inline-flex;align-items:center;gap:6px;height:36px;padding:0 14px;
  border-radius:8px;background:var(--accent);color:#241704;font-size:13px;font-weight:600;
}
.side-cta a:hover{background:#E49C39;color:#241704}
.side-foot{margin-top:auto;font-size:12px;color:var(--ink-3);line-height:1.7;padding:0 4px}
.side-foot strong{color:var(--ink-2);font-weight:600}

/* ---------- 顶部栏（移动端） ---------- */
.topbar{
  display:none;position:fixed;top:0;left:0;right:0;height:60px;z-index:1050;
  background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);
  align-items:center;justify-content:space-between;padding:0 16px;gap:12px;
}
.topbar .brand-text{font-size:16px}
.topbar .brand-sub{display:none}
.topbar-right{display:flex;align-items:center;gap:10px}
.burger{
  width:40px;height:40px;border:1px solid var(--line);border-radius:10px;background:#fff;
  display:grid;place-items:center;font-size:19px;color:var(--brand);
}
.burger:hover{border-color:var(--brand)}
.backdrop{
  position:fixed;inset:0;background:rgba(15,30,46,.5);opacity:0;visibility:hidden;
  transition:opacity .25s var(--ease),visibility .25s var(--ease);z-index:1040;
}
.backdrop.show{opacity:1;visibility:visible}

/* ---------- 主区域 ---------- */
.page{margin-left:var(--sidebar-w)}
.section{padding:88px 0}
.section-tight{padding:64px 0}

/* ---------- 内页横幅 ---------- */
.page-hero{position:relative;overflow:hidden;background:var(--brand-deep)}
.page-hero-bg{
  position:absolute;inset:0;
  background-image:linear-gradient(180deg,rgba(12,49,80,.72),rgba(12,49,80,.42)),url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
}
.page-hero-inner{position:relative;padding:72px 24px 60px}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.7);margin-bottom:20px}
.crumbs a{color:rgba(255,255,255,.86)}
.crumbs a:hover{color:#fff}
.crumbs span.sep{opacity:.5}
.badge-soft{
  display:inline-flex;align-items:center;gap:6px;height:28px;padding:0 12px;border-radius:999px;
  background:var(--brand-soft);color:var(--brand);font-size:12.5px;font-weight:600;
}
.badge-on-dark{background:rgba(255,255,255,.14);color:#fff}
.page-hero h1{
  font-size:clamp(30px,4vw,50px);line-height:1.18;color:#fff;margin:18px 0 14px;max-width:820px;
}
.page-hero .lead{
  font-size:16.5px;line-height:1.85;color:rgba(255,255,255,.86);max-width:720px;margin:0 0 26px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px}

/* ---------- 按钮 ---------- */
.btn-x{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 24px;
  border-radius:10px;font-size:15px;font-weight:600;border:1px solid transparent;
  transition:background .24s var(--ease),color .24s var(--ease),border-color .24s var(--ease),transform .24s var(--ease),box-shadow .24s var(--ease);
  cursor:pointer;
}
.btn-brand{background:var(--brand);color:#fff}
.btn-brand:hover{background:var(--brand-deep);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-accent{background:var(--accent);color:#241704}
.btn-accent:hover{background:#E49C39;color:#241704;transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--brand)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}
.btn-ghost-light{background:transparent;border-color:rgba(255,255,255,.42);color:#fff}
.btn-ghost-light:hover{border-color:#fff;color:#fff;background:rgba(255,255,255,.08)}
.btn-lg{height:52px;padding:0 28px;font-size:15.5px}

/* ---------- 通用标题 ---------- */
.sec-head{margin-bottom:40px;max-width:760px}
.sec-head .eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--teal);
  font-weight:600;letter-spacing:.04em;margin-bottom:10px;
}
.sec-head .eyebrow::before{content:"";width:3px;height:14px;border-radius:2px;background:var(--accent)}
.sec-head h2{font-size:clamp(24px,2.4vw,32px);line-height:1.3;margin-bottom:12px}
.sec-head p{color:var(--ink-2);font-size:15.5px;margin:0}
.sec-title-line{height:1px;background:var(--line);margin:0 0 28px}

/* ---------- 时间轴 ---------- */
.timeline-wrap{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:56px;align-items:start}
.timeline{position:relative;padding-left:64px}
.timeline::before{
  content:"";position:absolute;left:21px;top:16px;bottom:16px;width:2px;
  background:linear-gradient(180deg,var(--brand) 0%,var(--brand-soft) 85%,transparent 100%);
}
.tl-item{position:relative;padding-bottom:40px}
.tl-item:last-child{padding-bottom:0}
.tl-no{
  position:absolute;left:-64px;top:0;width:44px;height:44px;border-radius:50%;
  background:var(--surface);border:2px solid var(--brand);color:var(--brand);
  display:grid;place-items:center;font-size:15px;font-weight:700;
  box-shadow:0 0 0 6px var(--bg);z-index:1;
}
.tl-body{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:24px;box-shadow:var(--sh-2);transition:box-shadow .24s var(--ease),transform .24s var(--ease);
}
.tl-body:hover{box-shadow:var(--sh-3);transform:translateY(-4px)}
.tl-inner{display:flex;gap:20px;align-items:flex-start}
.tl-pic{
  flex:0 0 132px;width:132px;aspect-ratio:4/3;border-radius:var(--r-md);overflow:hidden;background:var(--brand-soft);
}
.tl-pic img{width:100%;height:100%;object-fit:cover}
.tl-text h3{font-size:19px;margin-bottom:8px}
.tl-text p{font-size:14.5px;color:var(--ink-2);margin:0 0 12px;line-height:1.8}
.tl-tags{display:flex;flex-wrap:wrap;gap:8px}
.tag{
  display:inline-flex;align-items:center;gap:5px;height:26px;padding:0 10px;border-radius:999px;
  background:var(--brand-soft);color:var(--brand);font-size:12.5px;
}
.tag-teal{background:rgba(31,138,138,.1);color:var(--teal)}
.tag-amber{background:rgba(217,143,43,.13);color:#9A6414}

/* 右侧信息栏 */
.side-box{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:24px;box-shadow:var(--sh-2);
}
.side-box + .side-box{margin-top:20px}
.side-box h3{font-size:16.5px;margin-bottom:14px;padding-left:12px;position:relative}
.side-box h3::before{content:"";position:absolute;left:0;top:5px;bottom:5px;width:3px;border-radius:2px;background:var(--accent)}
.info-row{display:flex;justify-content:space-between;gap:14px;padding:11px 0;border-bottom:1px dashed var(--line);font-size:14px}
.info-row:last-child{border-bottom:0;padding-bottom:0}
.info-row span:first-child{color:var(--ink-3)}
.info-row span:last-child{color:var(--ink);font-weight:600}
.side-note{font-size:13px;color:var(--ink-3);line-height:1.7;margin:14px 0 0}

/* ---------- 时段卡 ---------- */
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.slot-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:28px 24px;box-shadow:var(--sh-2);height:100%;
  transition:box-shadow .24s var(--ease),transform .24s var(--ease);
}
.slot-card:hover{box-shadow:var(--sh-3);transform:translateY(-4px)}
.slot-num{
  font-size:13px;font-weight:700;color:var(--accent);letter-spacing:.08em;
  font-variant-numeric:tabular-nums;margin-bottom:12px;display:block;
}
.slot-card h3{font-size:18px;margin-bottom:10px}
.slot-card p{font-size:14.5px;color:var(--ink-2);margin:0 0 16px}
.mini-list li{
  display:flex;gap:8px;align-items:flex-start;font-size:14px;color:var(--ink-2);
  padding:7px 0;border-top:1px solid var(--line);
}
.mini-list li i{color:var(--teal);font-size:14px;margin-top:4px}

/* ---------- 保障区 ---------- */
.guarantee{
  background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.g-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:0}
.g-item{padding:32px 26px;border-right:1px solid var(--line)}
.g-item:last-child{border-right:0}
.g-item i{font-size:22px;color:var(--brand);display:block;margin-bottom:12px}
.g-item h3{font-size:16.5px;margin-bottom:8px}
.g-item p{font-size:13.5px;color:var(--ink-2);margin:0;line-height:1.75}

/* ---------- FAQ ---------- */
.faq{max-width:860px}
.accordion-item{
  background:transparent;border:0;border-bottom:1px solid var(--line);border-radius:0;
}
.accordion-button{
  background:transparent;padding:20px 40px 20px 0;font-size:16.5px;font-weight:600;color:var(--ink);
  box-shadow:none;position:relative;
}
.accordion-button:not(.collapsed){background:transparent;color:var(--brand)}
.accordion-button:focus{box-shadow:none;border-color:transparent}
.accordion-button::after{
  background-image:none;content:"\F282";font-family:"bootstrap-icons";
  position:absolute;right:8px;top:50%;transform:translateY(-50%);
  width:auto;height:auto;font-size:15px;color:var(--ink-3);transition:transform .24s var(--ease),color .24s var(--ease);
}
.accordion-button:not(.collapsed)::after{transform:translateY(-50%) rotate(180deg);color:var(--brand)}
.accordion-body{padding:0 40px 22px 0;font-size:14.5px;color:var(--ink-2);line-height:1.85}

/* ---------- CTA ---------- */
.cta-band{background:linear-gradient(120deg,var(--brand-deep),var(--brand) 70%);position:relative;overflow:hidden}
.cta-band::after{
  content:"";position:absolute;right:-120px;top:-120px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(217,143,43,.22),transparent 65%);
}
.cta-inner{position:relative;z-index:1;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:28px;padding:64px 24px}
.cta-inner h2{color:#fff;font-size:clamp(22px,2.3vw,30px);line-height:1.3;margin-bottom:10px}
.cta-inner p{color:rgba(255,255,255,.82);font-size:15px;margin:0;max-width:560px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--surface);border-top:1px solid var(--line);padding:64px 0 0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:44px}
.footer-brand .brand{margin-bottom:16px}
.footer-brand p{font-size:13.5px;color:var(--ink-2);line-height:1.85;margin:0;max-width:360px}
.footer-col h4{font-size:15px;margin-bottom:16px}
.footer-col ul li{margin-bottom:10px}
.footer-col ul li a{font-size:13.5px;color:var(--ink-2)}
.footer-col ul li a:hover{color:var(--brand)}
.contact-line{display:flex;align-items:center;gap:9px;font-size:13.5px;color:var(--ink-2);margin-bottom:11px}
.contact-line i{color:var(--brand);font-size:14px}
.footer-bottom{
  border-top:1px solid var(--line);padding:18px 0;display:flex;flex-wrap:wrap;gap:10px;
  justify-content:space-between;font-size:12.5px;color:var(--ink-3);
}

/* ---------- 响应式 ---------- */
@media (max-width:1399px){
  .timeline-wrap{grid-template-columns:minmax(0,1fr) 300px;gap:40px}
}
@media (max-width:1199px){
  :root{--sidebar-w:76px}
  .sidebar{padding:20px 10px;align-items:center}
  .brand-text,.brand-sub,.side-cta,.side-foot,.side-divider{display:none}
  .brand{justify-content:center}
  .side-nav{width:100%}
  .side-link{justify-content:center;padding:0}
  .side-link span{display:none}
  .side-link.active::before{left:-2px}
  .timeline-wrap{grid-template-columns:1fr;gap:36px}
  .g-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .g-item:nth-child(2){border-right:0}
  .g-item:nth-child(1),.g-item:nth-child(2){border-bottom:1px solid var(--line)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:991px){
  :root{--sidebar-w:0px}
  .topbar{display:flex}
  .sidebar{
    transform:translateX(-100%);width:82vw;max-width:320px;padding:22px 16px;
    box-shadow:var(--sh-3);transition:transform .28s var(--ease);
  }
  .sidebar.open{transform:translateX(0)}
  .sidebar .brand-text,.sidebar .brand-sub,.sidebar .side-cta,.sidebar .side-foot,.sidebar .side-divider{display:block}
  .sidebar .brand{justify-content:flex-start}
  .sidebar .side-link{justify-content:flex-start;padding:0 12px}
  .sidebar .side-link span{display:block}
  .sidebar .side-cta{display:block}
  .page{margin-left:0;padding-top:60px}
  .section{padding:64px 0}
  .page-hero-inner{padding:52px 24px 44px}
  .grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:767px){
  .container{padding:0 16px}
  .section{padding:52px 0}
  .grid-3,.grid-2{grid-template-columns:1fr}
  .tl-inner{flex-direction:column}
  .tl-pic{width:100%;flex:none;aspect-ratio:16/9}
  .timeline{padding-left:52px}
  .timeline::before{left:17px}
  .tl-no{left:-52px;width:36px;height:36px;font-size:13.5px}
  .g-grid{grid-template-columns:1fr}
  .g-item{border-right:0;border-bottom:1px solid var(--line)}
  .g-item:last-child{border-bottom:0}
  .cta-inner{padding:52px 16px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column}
  .page-hero h1{margin-top:14px}
}
@media (max-width:575px){
  .btn-x{width:100%}
  .hero-actions{flex-direction:column}
  .cta-actions{flex-direction:column;width:100%}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important}
}

/* roulang page: category4 */
:root{
  --bg:#F5F7FA;
  --surface:#FFFFFF;
  --ink:#0F1E2E;
  --ink-2:#47586C;
  --ink-3:#8593A5;
  --line:#E4EAF1;
  --brand:#14476B;
  --brand-deep:#0C3150;
  --brand-soft:#E8F0F6;
  --accent:#D98F2B;
  --accent-soft:#FBF1E1;
  --teal:#1F8A8A;
  --teal-soft:#E4F2F2;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:18px;
  --sh-1:0 1px 2px rgba(15,30,46,.05);
  --sh-2:0 4px 12px -6px rgba(15,30,46,.12);
  --sh-3:0 18px 40px -24px rgba(15,30,46,.28);
  --ease:cubic-bezier(.2,.6,.3,1);
  --sidebar-w:248px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  background:var(--bg);
  color:var(--ink);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--brand);text-decoration:none;transition:color .2s var(--ease)}
a:hover{color:var(--brand-deep)}
button{font-family:inherit}
h1,h2,h3,h4{margin:0;line-height:1.35;font-weight:600;letter-spacing:-.01em}
p{margin:0 0 .9em}
p:last-child{margin-bottom:0}
ul,ol{margin:0;padding:0;list-style:none}
.container{width:100%;max-width:1180px;margin:0 auto;padding-left:24px;padding-right:24px}
.num{font-variant-numeric:tabular-nums}

/* ============ 侧栏 App Shell ============ */
.app-sidebar{
  position:fixed;left:0;top:0;bottom:0;width:var(--sidebar-w);
  background:var(--surface);border-right:1px solid var(--line);
  display:flex;flex-direction:column;gap:18px;
  padding:26px 18px 20px;z-index:1050;overflow-y:auto;
  transition:transform .28s var(--ease);
}
.brand{display:flex;align-items:center;gap:11px;color:var(--ink)}
.brand:hover{color:var(--ink)}
.brand-mark{
  width:40px;height:40px;flex:0 0 40px;border-radius:12px;
  background:linear-gradient(135deg,var(--brand),#1D6390);
  color:#fff;display:flex;align-items:center;justify-content:center;font-size:19px;
  box-shadow:var(--sh-2);
}
.brand-text{display:block;font-size:17px;font-weight:700;letter-spacing:-.02em;line-height:1.2}
.brand-sub{display:block;font-size:11.5px;color:var(--ink-3);letter-spacing:.04em}
.side-nav{display:flex;flex-direction:column;gap:6px;padding-top:6px;border-top:1px solid var(--line)}
.side-link{
  position:relative;display:flex;align-items:center;gap:11px;
  height:44px;padding:0 12px;border-radius:10px;
  font-size:14.5px;color:var(--ink-2);transition:all .2s var(--ease);
}
.side-link i{font-size:17px;color:var(--ink-3);transition:color .2s var(--ease)}
.side-link:hover{background:var(--brand-soft);color:var(--brand)}
.side-link:hover i{color:var(--brand)}
.side-link.active{background:var(--brand-soft);color:var(--brand);font-weight:600}
.side-link.active i{color:var(--brand)}
.side-link.active::before{
  content:"";position:absolute;left:0;top:9px;bottom:9px;width:3px;
  border-radius:0 3px 3px 0;background:var(--accent);
}
.side-cta{
  margin-top:auto;background:var(--brand-soft);border-radius:var(--r-md);
  padding:16px;border:1px solid #D8E5EF;
}
.side-cta-title{font-size:14.5px;font-weight:600;color:var(--brand-deep);margin-bottom:6px}
.side-cta-text{font-size:12.5px;color:var(--ink-2);line-height:1.7;margin-bottom:12px}
.side-cta .btn{width:100%;height:42px;font-size:14px}
.side-cta-tel{
  display:flex;align-items:center;justify-content:center;gap:6px;
  margin-top:10px;font-size:13px;color:var(--brand);font-variant-numeric:tabular-nums;
}
.side-foot{font-size:11.5px;color:var(--ink-3);line-height:1.7;border-top:1px solid var(--line);padding-top:12px}
.sidebar-mask{
  position:fixed;inset:0;background:rgba(15,30,46,.5);
  opacity:0;pointer-events:none;transition:opacity .28s var(--ease);z-index:1040;
}
.page-shell{margin-left:var(--sidebar-w)}
.mobile-bar{display:none}
body.nav-open .app-sidebar{transform:translateX(0)}
body.nav-open .sidebar-mask{opacity:1;pointer-events:auto}

/* ============ 按钮 ============ */
.btn{
  --bs-btn-padding-y:0;--bs-btn-padding-x:22px;--bs-btn-font-size:15px;
  --bs-btn-border-radius:10px;--bs-btn-focus-box-shadow:none;
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 22px;border-radius:10px;border:1px solid transparent;
  font-size:15px;font-weight:600;line-height:1;cursor:pointer;
  transition:all .24s var(--ease);
}
.btn:focus-visible,.side-link:focus-visible,.footer-col a:focus-visible{
  outline:2px solid rgba(217,143,43,.55);outline-offset:2px;
}
.btn-brand{background:var(--brand);color:#fff}
.btn-brand:hover{background:var(--brand-deep);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-accent{background:var(--accent);color:#241704}
.btn-accent:hover{background:#E8A03C;color:#241704;transform:translateY(-1px);box-shadow:0 10px 22px -14px rgba(217,143,43,.9)}
.btn-outline{background:var(--surface);border-color:var(--line);color:var(--ink-2)}
.btn-outline:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-1px)}
.btn-ghost-light{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.5);color:#fff}
.btn-ghost-light:hover{background:rgba(255,255,255,.18);color:#fff;border-color:#fff}
.btn-lg-x{height:52px;padding:0 28px;font-size:16px}

/* ============ 内页横幅 ============ */
.page-banner{
  position:relative;overflow:hidden;background:var(--brand-deep);color:#fff;
  padding:64px 0 58px;
}
.page-banner::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(12,49,80,.78),rgba(12,49,80,.5)),url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
}
.page-banner .container{position:relative;z-index:1}
.breadcrumb-x{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.72);margin-bottom:18px}
.breadcrumb-x a{color:rgba(255,255,255,.78)}
.breadcrumb-x a:hover{color:#fff}
.breadcrumb-x em{font-style:normal;color:#fff}
.badge-soft{
  display:inline-flex;align-items:center;gap:6px;
  background:rgba(217,143,43,.18);border:1px solid rgba(232,160,60,.5);
  color:#F6D29A;font-size:12.5px;padding:4px 12px;border-radius:999px;margin-bottom:16px;
}
.page-banner h1{
  font-size:clamp(30px,3.6vw,46px);line-height:1.18;font-weight:700;
  letter-spacing:-.02em;margin-bottom:16px;
}
.banner-lead{font-size:16.5px;color:rgba(255,255,255,.86);max-width:640px;margin-bottom:26px}
.banner-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:30px}
.banner-facts{display:flex;flex-wrap:wrap;gap:10px 26px;font-size:13.5px;color:rgba(255,255,255,.8)}
.banner-facts li{display:flex;align-items:center;gap:7px}
.banner-facts i{color:var(--accent)}

/* ============ 通用板块 ============ */
.section{padding:88px 0}
.section-alt{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-head{max-width:720px;margin-bottom:44px}
.sec-head h2{
  position:relative;padding-left:16px;font-size:clamp(24px,2.4vw,32px);
  line-height:1.3;margin-bottom:14px;
}
.sec-head h2::before{
  content:"";position:absolute;left:0;top:.32em;width:3px;height:22px;
  border-radius:2px;background:var(--accent);
}
.sec-head p{font-size:15.5px;color:var(--ink-2);line-height:1.85}

/* ============ 数据条 ============ */
.factbar{background:var(--surface);border-bottom:1px solid var(--line)}
.fact-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.fact{padding:32px 24px;border-right:1px solid var(--line);text-align:left}
.fact:first-child{padding-left:0}
.fact:last-child{border-right:0}
.fact-num{display:block;font-size:30px;font-weight:700;color:var(--brand);letter-spacing:-.02em;font-variant-numeric:tabular-nums;line-height:1.2}
.fact-num small{font-size:15px;font-weight:600;color:var(--ink-2);margin-left:3px}
.fact-label{display:block;font-size:13.5px;color:var(--ink-3);margin-top:6px}

/* ============ 规格清单（左标签右内容） ============ */
.spec-list{border-top:1px solid var(--line)}
.spec-row{
  display:grid;grid-template-columns:216px 1fr;gap:28px;
  padding:26px 12px;border-bottom:1px solid var(--line);
  transition:background .24s var(--ease);
}
.spec-row:hover{background:var(--brand-soft)}
.spec-key{display:flex;align-items:flex-start;gap:9px;font-size:16px;font-weight:600;color:var(--brand)}
.spec-key i{font-size:17px;color:var(--accent);margin-top:3px}
.spec-val{font-size:15.5px;color:var(--ink-2);line-height:1.85}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
.tag{
  display:inline-flex;align-items:center;gap:5px;font-size:12.5px;
  padding:3px 11px;border-radius:999px;background:var(--brand-soft);
  color:var(--brand);border:1px solid #D8E5EF;
}
.tag-teal{background:var(--teal-soft);color:var(--teal);border-color:#CCE5E5}
.tag-accent{background:var(--accent-soft);color:#9A6412;border-color:#EFDCBE}

/* ============ 对比表 ============ */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r-md);background:var(--surface);box-shadow:var(--sh-1)}
.compare-table{width:100%;min-width:720px;border-collapse:collapse;font-size:15px}
.compare-table th,.compare-table td{padding:16px 20px;text-align:left;border-bottom:1px solid var(--line)}
.compare-table thead th{
  background:var(--brand-soft);color:var(--brand-deep);font-weight:600;
  font-size:14.5px;white-space:nowrap;border-bottom:1px solid #D8E5EF;
}
.compare-table tbody tr:nth-child(even){background:#FAFCFE}
.compare-table tbody tr:hover{background:var(--accent-soft)}
.compare-table tbody tr:last-child td{border-bottom:0}
.compare-table td:first-child{color:var(--ink);font-weight:600}
.compare-table td{color:var(--ink-2)}
.compare-table .yes{color:var(--teal);font-weight:600}
.table-note{margin-top:14px;font-size:13px;color:var(--ink-3)}

/* ============ 环节清单 ============ */
.step-list{display:flex;flex-direction:column}
.step-item{
  display:grid;grid-template-columns:78px 1fr;gap:22px;align-items:flex-start;
  padding:24px 12px;border-bottom:1px dashed var(--line);
  transition:transform .24s var(--ease),background .24s var(--ease);
}
.step-item:first-child{border-top:1px dashed var(--line)}
.step-item:hover{background:var(--surface);transform:translateX(4px)}
.step-no{
  font-size:22px;font-weight:700;color:var(--accent);
  font-variant-numeric:tabular-nums;letter-spacing:-.02em;line-height:1.4;
}
.step-body h3{font-size:18px;margin-bottom:8px}
.step-body p{font-size:15px;color:var(--ink-2);line-height:1.85}
.step-body .tag-row{margin-top:10px}

/* ============ FAQ ============ */
.accordion-item{background:transparent;border:0;border-bottom:1px solid var(--line)}
.accordion-item:first-of-type{border-top:1px solid var(--line)}
.accordion-button{
  background:transparent;box-shadow:none;padding:24px 48px 24px 0;
  font-size:17px;font-weight:600;color:var(--ink);line-height:1.6;
}
.accordion-button:not(.collapsed){color:var(--brand);background:transparent;box-shadow:none}
.accordion-button:focus{box-shadow:none;border-color:transparent}
.accordion-button:focus-visible{outline:2px solid rgba(217,143,43,.55);outline-offset:2px}
.accordion-button::after{
  background-image:none;content:"\F282";font-family:"bootstrap-icons";
  width:24px;height:24px;line-height:24px;text-align:center;font-size:14px;
  color:var(--brand);transition:transform .24s var(--ease);
}
.accordion-button:not(.collapsed)::after{transform:rotate(180deg);background-image:none}
.accordion-body{padding:0 0 26px;font-size:15.5px;color:var(--ink-2);line-height:1.85;max-width:860px}

/* ============ CTA ============ */
.cta-band{background:var(--brand-deep);color:#fff;padding:64px 0}
.cta-inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:28px}
.cta-band h2{font-size:clamp(24px,2.2vw,30px);margin-bottom:10px;color:#fff}
.cta-band p{font-size:15.5px;color:rgba(255,255,255,.82);max-width:640px;margin:0}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}

/* ============ 页脚 ============ */
.site-footer{background:var(--surface);border-top:1px solid var(--line);padding:64px 0 0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:44px}
.footer-brand p{font-size:14px;color:var(--ink-2);line-height:1.85;margin-top:16px;max-width:340px}
.footer-col h4{font-size:14.5px;color:var(--ink);margin-bottom:16px;font-weight:600}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{font-size:14px;color:var(--ink-2)}
.footer-col a:hover{color:var(--brand)}
.contact-line{display:flex;align-items:center;gap:9px;font-size:14px;color:var(--ink-2);margin-bottom:12px}
.contact-line i{color:var(--brand);font-size:15px}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  border-top:1px solid var(--line);padding:20px 0 26px;
  font-size:12.5px;color:var(--ink-3);
}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  :root{--sidebar-w:76px}
  .app-sidebar{padding:22px 12px 18px;align-items:center}
  .brand-text,.brand-sub,.side-cta,.side-foot{display:none}
  .side-nav{width:100%;border-top:0}
  .side-link{justify-content:center;padding:0;height:46px}
  .side-link span{display:none}
  .side-link:hover span{
    display:block;position:absolute;left:62px;top:50%;transform:translateY(-50%);
    background:var(--brand-deep);color:#fff;font-size:13px;padding:6px 12px;
    border-radius:8px;white-space:nowrap;z-index:60;box-shadow:var(--sh-2);
  }
  .side-link:hover{background:var(--brand-soft)}
  .fact-grid{grid-template-columns:repeat(2,1fr)}
  .fact{padding:26px 20px}
  .fact:first-child{padding-left:20px}
  .fact:nth-child(2){border-right:0}
  .fact:nth-child(1),.fact:nth-child(2){border-bottom:1px solid var(--line)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px}
}
@media (max-width:991px){
  :root{--sidebar-w:0px}
  .mobile-bar{
    display:flex;align-items:center;justify-content:space-between;
    position:fixed;left:0;right:0;top:0;height:60px;padding:0 16px;
    background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);
    z-index:1030;
  }
  .mobile-bar .brand-mark{width:34px;height:34px;flex:0 0 34px;border-radius:10px;font-size:16px}
  .mobile-bar .brand-text{font-size:16px}
  .mobile-bar-right{display:flex;align-items:center;gap:10px}
  .mobile-bar .btn{height:38px;padding:0 14px;font-size:13.5px;border-radius:9px}
  .menu-toggle{
    width:38px;height:38px;border-radius:9px;border:1px solid var(--line);
    background:var(--surface);color:var(--brand);font-size:19px;
    display:inline-flex;align-items:center;justify-content:center;
  }
  .app-sidebar{
    width:82vw;max-width:320px;padding:24px 18px 20px;
    align-items:stretch;box-shadow:var(--sh-3);transform:translateX(-100%);
  }
  .brand-text,.brand-sub,.side-cta,.side-foot{display:block}
  .side-nav{width:100%;border-top:1px solid var(--line)}
  .side-link{justify-content:flex-start;padding:0 12px;height:46px}
  .side-link span{display:inline}
  .side-link:hover span{position:static;transform:none;background:transparent;color:var(--brand);padding:0;box-shadow:none}
  .page-shell{margin-left:0;padding-top:60px}
  .section{padding:64px 0}
  .sec-head{margin-bottom:34px}
  .spec-row{grid-template-columns:1fr;gap:12px;padding:22px 4px}
  .step-item{grid-template-columns:60px 1fr;gap:16px;padding:22px 4px}
  .cta-band{padding:52px 0}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
}
@media (max-width:767px){
  body{font-size:15.5px}
  .container{padding-left:16px;padding-right:16px}
  .page-banner{padding:44px 0 42px}
  .banner-lead{font-size:15.5px}
  .banner-actions .btn{flex:1 1 auto}
  .fact{padding:22px 16px}
  .fact-num{font-size:25px}
  .fact-grid{grid-template-columns:1fr 1fr}
  .section{padding:52px 0}
  .spec-key{font-size:15.5px}
  .spec-val{font-size:15px}
  .accordion-button{font-size:15.8px;padding:20px 42px 20px 0}
  .cta-inner{flex-direction:column;align-items:flex-start}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1 1 auto}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column}
}
@media (max-width:520px){
  .fact-grid{grid-template-columns:1fr}
  .fact{border-right:0;border-bottom:1px solid var(--line);padding-left:0}
  .fact:last-child{border-bottom:0}
  .step-item{grid-template-columns:1fr;gap:6px}
  .step-no{font-size:19px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important}
}