/* roulang page: index */
:root{
  --blue:#1146C8;--blue-d:#0D38A6;--tint:#E8EEFC;
  --orange:#FF6A1F;--orange-d:#E85A12;
  --cyan:#3DE1F0;
  --dark:#0B1220;--dark-2:#101A2B;--dark-line:#1B2740;
  --page:#F6F8FC;--card:#FFFFFF;
  --line:#E3E9F2;--divider:#EEF2F8;
  --t1:#101828;--t2:#41506B;--t3:#7A879D;
  --r-card:14px;--r-btn:10px;--r-badge:999px;
  --sh-1:0 2px 8px rgba(16,24,40,.06);
  --sh-2:0 14px 30px rgba(17,70,200,.12);
  --container:1200px;
  --sp:96px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:126px}
body{
  margin:0;padding-top:112px;
  font-family:"PingFang SC","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;line-height:1.85;color:var(--t2);background:var(--page);
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
h1,h2,h3,h4{margin:0;color:var(--t1);font-weight:700;line-height:1.25}
h1{font-size:44px;letter-spacing:-.5px}
h2{font-size:32px}
h3{font-size:22px}
h4{font-size:18px}
p{margin:0}
a{color:inherit;text-decoration:none}
ul{margin:0;padding:0;list-style:none}
img{display:block;max-width:100%;height:auto}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--blue);outline-offset:2px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}

/* ---------- header ---------- */
.site-header{position:fixed;top:0;left:0;right:0;z-index:80;background:var(--dark);border-bottom:1px solid var(--dark-line);transition:box-shadow .25s ease}
.site-header.scrolled{box-shadow:0 8px 24px rgba(11,18,32,.35)}
.header-inner{height:68px;display:flex;align-items:center;gap:20px;transition:height .25s ease}
.site-header.scrolled .header-inner{height:60px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{width:32px;height:32px;border-radius:9px;display:grid;place-items:center;color:#fff;font-weight:800;font-size:12px;letter-spacing:.5px;background:linear-gradient(135deg,#1146C8,#0D38A6);box-shadow:0 0 0 1px rgba(61,225,240,.35)}
.brand-text strong{display:block;color:#fff;font-size:16px;font-weight:700;line-height:1.2;letter-spacing:.2px}
.brand-text em{display:block;font-style:normal;font-size:11px;color:#93A3BC;line-height:1.3;letter-spacing:1px}
.main-nav{display:flex;align-items:center;gap:2px;margin-left:auto}
.main-nav a{position:relative;padding:10px 14px;font-size:15px;font-weight:500;color:#C6D2E4;border-radius:8px;transition:color .2s ease;min-height:44px;display:inline-flex;align-items:center}
.main-nav a::after{content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;background:var(--cyan);transform:scaleX(0);transform-origin:left center;transition:transform .2s ease}
.main-nav a:hover{color:#fff}
.main-nav a:hover::after{transform:scaleX(1)}
.main-nav a.active{color:#fff;text-shadow:0 0 10px rgba(61,225,240,.55)}
.main-nav a.active::after{transform:scaleX(1)}
.header-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:0 24px;border-radius:var(--r-btn);font-size:15px;font-weight:600;border:1px solid transparent;transition:background .2s ease,box-shadow .2s ease,transform .2s ease,color .2s ease,border-color .2s ease;white-space:nowrap;line-height:1.2}
.btn-primary{background:var(--orange);color:#fff;border-radius:var(--r-btn)}
.btn-primary:hover{background:var(--orange-d);box-shadow:0 10px 24px rgba(255,106,31,.28);transform:translateY(-1px)}
.btn-outline{background:transparent;border-color:var(--blue);color:var(--blue)}
.btn-outline:hover{background:var(--tint);box-shadow:0 8px 20px rgba(17,70,200,.12)}
.btn-ghost{background:transparent;border-color:rgba(255,255,255,.22);color:#E6EDF7;min-height:40px;padding:0 18px;font-size:14px;border-radius:var(--r-badge)}
.btn-ghost:hover{border-color:var(--cyan);color:#fff;box-shadow:0 0 0 3px rgba(61,225,240,.14)}
.btn-cta{background:var(--orange);color:#fff;border-radius:var(--r-badge);min-height:40px;padding:0 20px;font-size:14px;box-shadow:0 0 0 1px rgba(255,106,31,.25)}
.btn-cta:hover{background:var(--orange-d);box-shadow:0 0 0 1px rgba(255,106,31,.4),0 8px 22px rgba(255,106,31,.32);transform:translateY(-1px)}
.nav-toggle{display:none;width:44px;height:44px;border:1px solid rgba(255,255,255,.2);border-radius:10px;background:transparent;color:#fff;align-items:center;justify-content:center;margin-left:auto}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan)}

/* anchor bar */
.anchor-bar{background:var(--dark-2);border-bottom:1px solid var(--dark-line)}
.anchor-inner{height:44px;display:flex;align-items:center;gap:6px;overflow-x:auto;scrollbar-width:none}
.anchor-inner::-webkit-scrollbar{display:none}
.anchor-link{font-size:13px;color:#8FA0BA;padding:6px 14px;border-radius:999px;transition:.2s ease;white-space:nowrap;display:inline-flex;align-items:center;min-height:32px}
.anchor-link:hover{color:#fff;background:rgba(255,255,255,.06)}
.anchor-link.active{color:#fff;background:rgba(61,225,240,.14);box-shadow:inset 0 0 0 1px rgba(61,225,240,.45)}

/* ---------- hero ---------- */
.hero{position:relative;padding:72px 0 88px;background:linear-gradient(180deg,#FFFFFF 0%,var(--page) 100%);overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.kicker{display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:600;letter-spacing:1.4px;color:var(--blue);background:var(--tint);border-radius:999px;padding:6px 14px;line-height:1.5}
.kicker::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--orange)}
.hero h1{margin-top:20px;font-size:44px;line-height:1.22}
.hero h1 .hl{color:var(--blue)}
.hero-sub{margin-top:18px;font-size:18px;line-height:1.7;color:var(--t2);max-width:560px}
.hero-actions{display:flex;gap:14px;margin-top:32px;flex-wrap:wrap}
.hero-metrics{display:flex;align-items:center;margin-top:40px;flex-wrap:wrap;row-gap:18px}
.metric{padding:0 26px;border-left:1px solid var(--line)}
.metric:first-child{padding-left:0;border-left:0}
.metric strong{display:block;font-family:Inter,system-ui,sans-serif;font-size:28px;font-weight:800;color:var(--t1);line-height:1.1}
.metric strong em{font-style:normal;font-size:15px;color:var(--blue);margin-left:2px;font-weight:700}
.metric span{font-size:12px;color:var(--t3)}
.hero-media{border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);box-shadow:0 24px 60px rgba(11,18,32,.14);background:#fff}
.hero-media img{width:100%;aspect-ratio:5/4;object-fit:cover}

/* ---------- common section ---------- */
.section{padding:var(--sp) 0}
.section-head{max-width:660px}
.section-head.center{margin:0 auto;text-align:center}
.section-head h2{margin-top:14px}
.section-head h2::after{content:"";display:block;width:32px;height:3px;border-radius:2px;background:var(--blue);margin-top:14px}
.section-head.center h2::after{margin-left:auto;margin-right:auto}
.section-head p{margin-top:14px;font-size:16px;color:var(--t2)}
.section-head.row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;max-width:none}
.text-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--blue);min-height:44px;transition:color .2s ease}
.text-link:hover{color:var(--blue-d)}

/* ---------- highlights ---------- */
.highlights-grid{display:grid;grid-template-columns:340px 1fr;gap:64px;align-items:start}
.sticky-head{position:sticky;top:140px}
.highlight-list{border-top:1px solid var(--divider)}
.highlight-item{display:flex;gap:24px;align-items:flex-start;padding:26px 0;border-bottom:1px solid var(--divider);transition:background .2s ease}
.hl-no{font-family:Inter,system-ui,sans-serif;font-size:15px;font-weight:800;color:var(--orange);min-width:34px;line-height:1.6}
.hl-body{flex:1}
.hl-body h3{font-size:18px;line-height:1.4;transition:color .2s ease}
.hl-body p{margin-top:8px;font-size:15px;line-height:1.75;color:var(--t2)}
.hl-arrow{margin-left:auto;color:var(--t3);transition:transform .2s ease,color .2s ease;line-height:1.6}
.highlight-item:hover .hl-body h3{color:var(--blue)}
.highlight-item:hover .hl-arrow{transform:translateX(4px);color:var(--blue)}

/* ---------- demo ---------- */
.demo{background:#fff}
.demo-frame{max-width:960px;margin:48px auto 0}
.demo-main{border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);box-shadow:var(--sh-1);background:var(--page)}
.demo-main img{width:100%;aspect-ratio:16/10;object-fit:cover}
.demo-thumbs{display:flex;gap:14px;margin-top:16px}
.demo-thumb{flex:1;padding:0;border:1px solid var(--line);border-radius:10px;overflow:hidden;background:#F9FBFE;transition:.2s ease;cursor:pointer}
.demo-thumb img{width:100%;aspect-ratio:16/10;object-fit:cover;opacity:.72;transition:opacity .2s ease}
.demo-thumb:hover img{opacity:1}
.demo-thumb.active{border-color:var(--blue);box-shadow:0 0 0 3px rgba(17,70,200,.12)}
.demo-thumb.active img{opacity:1}
.demo-note{margin-top:16px;font-size:13px;color:var(--t3);text-align:center}

/* ---------- proof ---------- */
.proof{background:var(--page)}
.stat-bar{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:44px;padding:28px 32px;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh-1)}
.stat strong{display:block;font-family:Inter,system-ui,sans-serif;font-size:32px;font-weight:800;color:var(--blue);line-height:1.1}
.stat strong em{font-style:normal;font-size:16px;color:var(--t1);margin-left:2px;font-weight:700}
.stat span{display:block;margin-top:6px;font-size:13px;color:var(--t3)}
.quote-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:40px;align-items:start}
.quote-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:28px;box-shadow:var(--sh-1);transition:box-shadow .2s ease,transform .2s ease;margin:0}
.quote-card:nth-child(2){margin-top:24px}
.quote-card:hover{box-shadow:var(--sh-2);transform:translateY(-2px)}
.quote-card p{position:relative;padding-top:24px;font-size:15px;line-height:1.85;color:var(--t2)}
.quote-card p::before{content:"\201C";position:absolute;top:-14px;left:-2px;font-size:52px;line-height:1;color:var(--blue);opacity:.22;font-family:Georgia,serif}
.quote-foot{display:flex;align-items:center;gap:10px;margin-top:20px;padding-top:16px;border-top:1px solid var(--divider);font-size:12px;color:var(--t3)}
.quote-foot b{font-size:13px;font-weight:600;color:var(--t1)}
.quote-foot i{width:4px;height:4px;border-radius:50%;background:var(--line);font-style:normal}

/* ---------- latest(cms) ---------- */
.latest{background:#fff}
.latest-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:32px;margin-top:40px}
.latest-grid.single{grid-template-columns:1fr}
.latest-lead{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1);transition:box-shadow .2s ease,transform .2s ease}
.latest-lead:hover{box-shadow:var(--sh-2);transform:translateY(-2px)}
.latest-lead .thumb{aspect-ratio:16/10;overflow:hidden;background:var(--page)}
.latest-lead .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.latest-lead:hover .thumb img{transform:scale(1.03)}
.latest-lead .body{padding:24px 26px 26px;display:flex;flex-direction:column;gap:12px;flex:1}
.badge{display:inline-flex;align-items:center;align-self:flex-start;font-size:12px;font-weight:600;color:var(--blue);background:var(--tint);border-radius:var(--r-badge);padding:3px 11px;line-height:1.7;white-space:nowrap}
.badge-sm{font-size:11px;padding:2px 9px}
.latest-lead h3{font-size:22px;line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.latest-lead .excerpt{font-size:15px;line-height:1.75;color:var(--t2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.latest-meta{display:flex;align-items:center;gap:10px;margin-top:auto;padding-top:6px;font-size:12px;color:var(--t3)}
.latest-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--line)}
.latest-side{display:flex;flex-direction:column}
.latest-item{display:grid;grid-template-columns:96px 1fr;gap:16px;padding:16px 0;border-bottom:1px solid var(--divider);align-items:flex-start;transition:.2s ease}
.latest-item:first-child{padding-top:0}
.latest-item:last-child{border-bottom:0;padding-bottom:0}
.latest-item .thumb{width:96px;height:72px;border-radius:10px;overflow:hidden;border:1px solid var(--line);background:var(--page)}
.latest-item .thumb img{width:100%;height:100%;object-fit:cover}
.latest-item h4{font-size:15px;line-height:1.5;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden;transition:color .2s ease}
.latest-item:hover h4{color:var(--blue)}
.latest-item-meta{display:flex;align-items:center;gap:10px;margin-top:8px;font-size:12px;color:var(--t3);flex-wrap:wrap}
.empty-state{min-height:240px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;background:#F9FBFE;border:1px dashed var(--line);border-radius:var(--r-card);margin-top:40px;text-align:center;padding:36px 24px}
.empty-state svg{color:#B6C3D9}
.empty-state p{font-size:15px;color:var(--t3)}

/* ---------- plans ---------- */
.plans{background:var(--page)}
.plan-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:48px;padding-top:12px;align-items:stretch}
.plan{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:32px 28px;display:flex;flex-direction:column;box-shadow:var(--sh-1);transition:box-shadow .2s ease,transform .2s ease}
.plan:hover{box-shadow:var(--sh-2);transform:translateY(-2px)}
.plan.featured{border:2px solid var(--blue);margin-top:-12px;padding-top:44px;box-shadow:0 18px 40px rgba(17,70,200,.14)}
.plan-tag{position:absolute;top:0;left:24px;transform:translateY(-1px);background:var(--orange);color:#fff;font-size:12px;font-weight:600;padding:4px 14px;border-radius:0 0 8px 8px;line-height:1.7}
.plan h3{font-size:18px}
.plan-price{display:flex;align-items:baseline;gap:6px;margin:14px 0 2px}
.plan-price strong{font-family:Inter,system-ui,sans-serif;font-size:36px;font-weight:800;color:var(--t1);line-height:1.1}
.plan-price span{font-size:13px;color:var(--t3)}
.plan-desc{font-size:13px;color:var(--t3);line-height:1.7}
.plan ul{margin:22px 0 26px;display:flex;flex-direction:column;gap:12px}
.plan li{display:flex;gap:10px;font-size:14px;line-height:1.7;color:var(--t2);align-items:flex-start}
.plan li svg{flex:0 0 auto;margin-top:5px;color:var(--blue)}
.plan .btn{width:100%;margin-top:auto}

/* ---------- faq ---------- */
.faq{background:#fff}
.faq-grid{display:grid;grid-template-columns:340px 1fr;gap:64px;align-items:start}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:12px;margin-bottom:12px;overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease}
.faq-item.open{border-color:#CBD9F2;box-shadow:var(--sh-1)}
.faq-q{position:relative;width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 22px;background:none;border:0;text-align:left;font-size:16px;font-weight:600;color:var(--t1);line-height:1.6;transition:color .2s ease;min-height:44px;cursor:pointer}
.faq-q::before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--orange);transform:scaleY(0);transform-origin:center;transition:transform .2s ease}
.faq-item.open .faq-q{color:var(--blue)}
.faq-item.open .faq-q::before{transform:scaleY(1)}
.faq-icon{flex:0 0 auto;color:var(--t3);transition:transform .25s ease,color .25s ease}
.faq-item.open .faq-icon{transform:rotate(45deg);color:var(--blue)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-item.open .faq-a{max-height:420px}
.faq-a p{padding:0 22px 20px 22px;font-size:15px;line-height:1.85;color:var(--t2)}
.faq-more{margin-top:26px}

/* ---------- cta banner ---------- */
.cta-banner{position:relative;background:var(--dark);color:#E6EDF7;overflow:hidden}
.cta-banner::before{content:"";position:absolute;inset:0;background:url(/assets/images/backpic/back-3.webp) center/cover no-repeat;opacity:.2}
.cta-banner::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(11,18,32,.92) 0%,rgba(11,18,32,.7) 55%,rgba(11,18,32,.92) 100%)}
.cta-inner{position:relative;z-index:2;display:flex;align-items:center;justify-content:space-between;gap:32px;padding:64px 0;min-height:220px}
.cta-inner h2{color:#fff;font-size:30px}
.cta-inner p{color:#9FB0C8;margin-top:10px;max-width:560px;font-size:15px}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}

/* ---------- footer ---------- */
.site-footer{background:var(--dark);color:#93A3BC;border-top:1px solid var(--dark-line)}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;padding:64px 0 48px}
.footer-brand .brand-text strong{color:#fff}
.footer-desc{font-size:14px;margin-top:18px;line-height:1.9;color:#8294AD;max-width:340px}
.footer-col h4{color:#fff;font-size:14px;margin-bottom:14px;letter-spacing:.3px}
.footer-col a{display:block;font-size:14px;padding:6px 0;color:#93A3BC;transition:color .2s ease}
.footer-col a:hover{color:var(--cyan)}
.footer-col p{font-size:14px;line-height:1.9;color:#8294AD}
.footer-bottom{border-top:1px solid var(--dark-line);padding:20px 0 28px;display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;font-size:13px;color:#6F819C}
.footer-bottom a{color:#93A3BC}
.footer-bottom a:hover{color:var(--cyan)}

/* ---------- floating cta ---------- */
.float-cta{position:fixed;right:26px;top:50%;z-index:70;display:inline-flex;align-items:center;gap:10px;background:var(--blue);color:#fff;border-radius:var(--r-badge);padding:13px 18px;box-shadow:0 14px 32px rgba(17,70,200,.32);opacity:0;pointer-events:none;transform:translateY(-50%) translateX(16px);transition:opacity .3s ease,transform .3s ease,background .2s ease,box-shadow .2s ease}
.float-cta.show{opacity:1;pointer-events:auto;transform:translateY(-50%) translateX(0)}
.float-cta:hover{background:var(--blue-d);transform:translateY(-50%) translateX(-4px);box-shadow:0 18px 38px rgba(17,70,200,.42)}
.float-cta strong{display:block;font-size:14px;line-height:1.35;font-weight:600}
.float-cta span{display:block;font-size:11px;color:#C7D6F5;line-height:1.35}
.float-bar{display:none}

/* ---------- drawer ---------- */
.drawer{position:fixed;inset:0;z-index:95;pointer-events:none}
.drawer-mask{position:absolute;inset:0;background:rgba(11,18,32,.62);opacity:0;transition:opacity .25s ease}
.drawer-panel{position:absolute;top:0;right:0;bottom:0;width:min(84vw,340px);background:var(--dark);border-left:1px solid var(--dark-line);padding:20px;display:flex;flex-direction:column;gap:4px;transform:translateX(100%);transition:transform .3s ease}
.drawer.open{pointer-events:auto}
.drawer.open .drawer-mask{opacity:1}
.drawer.open .drawer-panel{transform:translateX(0)}
.drawer-top{display:flex;align-items:center;justify-content:space-between;padding-bottom:16px;border-bottom:1px solid var(--dark-line);margin-bottom:10px}
.drawer-close{width:44px;height:44px;border-radius:10px;border:1px solid rgba(255,255,255,.2);background:transparent;color:#fff;display:grid;place-items:center}
.drawer-close:hover{border-color:var(--cyan);color:var(--cyan)}
.drawer-panel a.drawer-link{display:flex;align-items:center;justify-content:space-between;padding:14px 12px;border-radius:10px;color:#C6D2E4;font-size:15px;font-weight:500;opacity:0;transform:translateX(14px);transition:opacity .3s ease,transform .3s ease,background .2s ease}
.drawer.open .drawer-panel a.drawer-link{opacity:1;transform:translateX(0)}
.drawer-panel a.drawer-link:nth-child(3){transition-delay:.04s}
.drawer-panel a.drawer-link:nth-child(4){transition-delay:.08s}
.drawer-panel a.drawer-link:nth-child(5){transition-delay:.12s}
.drawer-panel a.drawer-link:hover{background:rgba(255,255,255,.06);color:#fff}
.drawer-panel a.drawer-link.active{color:#fff;box-shadow:inset 2px 0 0 var(--cyan)}
.drawer-cta{margin-top:auto;padding-top:18px;border-top:1px solid var(--dark-line)}
.drawer-cta .btn{width:100%}

/* ---------- responsive ---------- */
@media (max-width:1180px){
  .highlights-grid,.faq-grid{gap:44px;grid-template-columns:300px 1fr}
  h1,.hero h1{font-size:38px}
}
@media (max-width:1024px){
  :root{--sp:72px}
  .main-nav,.header-actions{display:none}
  .nav-toggle{display:inline-flex}
  .header-inner{height:60px}
  .site-header.scrolled .header-inner{height:56px}
  .hero{padding:52px 0 64px}
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero h1{font-size:34px}
  .hero-media img{aspect-ratio:16/10}
  .highlights-grid,.faq-grid{grid-template-columns:1fr;gap:32px}
  .sticky-head{position:static}
  .latest-grid{grid-template-columns:1fr}
  .plan-grid{grid-template-columns:1fr;gap:20px}
  .plan.featured{margin-top:0;padding-top:40px}
  .stat-bar{grid-template-columns:1fr;gap:18px}
  .quote-grid{grid-template-columns:1fr;gap:20px}
  .quote-card:nth-child(2){margin-top:0}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .cta-inner{flex-direction:column;align-items:flex-start;padding:52px 0}
}
@media (max-width:900px){
  body{padding-top:60px;padding-bottom:72px}
  html{scroll-padding-top:76px}
  .anchor-bar{display:none}
  .float-cta{display:none}
  .float-bar{display:flex;position:fixed;left:0;right:0;bottom:0;z-index:75;background:#fff;border-top:1px solid var(--line);padding:8px 16px calc(8px + env(safe-area-inset-bottom));align-items:center;justify-content:space-between;gap:12px;box-shadow:0 -6px 20px rgba(16,24,40,.08)}
  .float-bar-text strong{display:block;font-size:13px;color:var(--t1);line-height:1.3}
  .float-bar-text span{display:block;font-size:11px;color:var(--t3);line-height:1.3}
  .float-bar .btn{min-height:44px;padding:0 20px;font-size:14px;border-radius:var(--r-badge)}
}
@media (max-width:768px){
  :root{--sp:56px}
  h1,.hero h1{font-size:30px}
  h2{font-size:24px}
  h3{font-size:19px}
  h4{font-size:17px}
  .container{padding:0 18px}
  .hero-sub{font-size:16px}
  .hero-metrics{gap:0}
  .metric{padding:0 18px}
  .demo-thumbs{gap:10px}
  .quote-card{padding:22px}
  .plan{padding:26px 22px}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding:48px 0 36px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:520px){
  .hero h1{font-size:27px}
  .brand-text strong{font-size:15px}
  .brand-text em{font-size:10px}
  .hero-actions .btn{width:100%}
  .hero-metrics{flex-direction:column;align-items:flex-start;gap:14px}
  .metric{border-left:0;padding:0}
  .stat-bar{padding:22px}
  .latest-lead .body{padding:20px}
  .latest-lead h3{font-size:19px}
  .latest-item{grid-template-columns:80px 1fr;gap:12px}
  .latest-item .thumb{width:80px;height:64px}
  .faq-q{padding:16px 18px;font-size:15px}
  .faq-a p{padding:0 18px 18px 18px}
  .cta-inner h2{font-size:23px}
  .cta-actions .btn{width:100%}
}

/* roulang page: article */
:root{
  --blue:#1146C8; --blue-d:#0D38A6; --blue-t:#E8EEFC;
  --orange:#FF6A1F; --orange-d:#E85A12;
  --cyan:#3DE1F0;
  --dark:#0B1220; --dark-2:#111B31; --line-dark:#1B2740;
  --bg:#F6F8FC; --card:#FFFFFF; --border:#E3E9F2; --split:#EEF2F8;
  --ink:#101828; --txt:#41506B; --muted:#7A879D;
  --r-card:14px; --r-btn:10px; --r-img:12px;
  --sh1:0 2px 8px rgba(16,24,40,.06);
  --sh2:0 14px 30px rgba(17,70,200,.12);
  --font:"PingFang SC","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,sans-serif;
  --num:"Inter","PingFang SC",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;font-family:var(--font);background:var(--bg);color:var(--txt);
  font-size:16px;line-height:1.8;letter-spacing:0;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none;}
img{max-width:100%;display:block;}
button{font-family:inherit;cursor:pointer;border:none;background:none;}
ul,ol{margin:0;padding:0;list-style:none;}
a:focus-visible,button:focus-visible{outline:2px solid var(--blue);outline-offset:3px;border-radius:6px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}

/* ============ 顶栏 ============ */
.site-header{
  position:sticky;top:0;z-index:60;background:var(--dark);
  border-bottom:1px solid var(--line-dark);transition:box-shadow .25s ease;
}
.site-header.shrink{box-shadow:0 8px 24px rgba(11,18,32,.35);}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:68px;transition:height .25s ease;}
.site-header.shrink .header-inner{height:60px;}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{
  width:34px;height:34px;border-radius:9px;display:grid;place-items:center;
  background:linear-gradient(135deg,#1146C8 0%,#1E63E9 55%,#3DE1F0 130%);
  color:#fff;font-family:var(--num);font-weight:800;font-size:14px;letter-spacing:.5px;
  box-shadow:0 0 0 1px rgba(61,225,240,.35),0 0 18px rgba(61,225,240,.22);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-text strong{color:#E6EDF7;font-size:16px;font-weight:700;letter-spacing:.02em;}
.brand-text em{color:#93A3BC;font-style:normal;font-size:11px;letter-spacing:.16em;margin-top:3px;}
.main-nav{display:flex;align-items:center;gap:4px;}
.main-nav a{
  position:relative;padding:10px 14px;font-size:15px;font-weight:500;color:#C6D2E4;
  border-radius:8px;transition:color .2s ease;
}
.main-nav a::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;
  background:var(--cyan);box-shadow:0 0 10px rgba(61,225,240,.55);
  transform:scaleX(0);transform-origin:left;transition:transform .2s ease;
}
.main-nav a:hover{color:#fff;}
.main-nav a:hover::after{transform:scaleX(1);}
.main-nav a.active{color:#fff;text-shadow:0 0 10px rgba(61,225,240,.55);}
.main-nav a.active::after{transform:scaleX(1);}
.header-actions{display:flex;align-items:center;gap:12px;flex-shrink:0;}
.btn-cta{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 24px;border-radius:999px;
  background:var(--orange);color:#fff;font-size:14px;font-weight:600;
  box-shadow:0 8px 20px rgba(255,106,31,.28);
  transition:background .2s ease,transform .2s ease,box-shadow .2s ease;
}
.btn-cta:hover{background:var(--orange-d);transform:translateY(-1px);box-shadow:0 12px 26px rgba(255,106,31,.36);}
.btn-cta:active{transform:translateY(0);}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;
  height:40px;padding:0 20px;border-radius:999px;
  border:1px solid rgba(255,255,255,.2);color:#C6D2E4;font-size:14px;font-weight:500;
  transition:border-color .2s ease,color .2s ease,background .2s ease;
}
.btn-ghost:hover{border-color:rgba(61,225,240,.6);color:#fff;background:rgba(61,225,240,.06);}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:10px;border:1px solid rgba(255,255,255,.2);
  align-items:center;justify-content:center;flex-direction:column;gap:5px;
}
.nav-toggle span{display:block;width:18px;height:2px;background:#C6D2E4;border-radius:2px;transition:.2s;}
.nav-toggle:hover span{background:var(--cyan);}

/* ============ 抽屉菜单 ============ */
.drawer-mask{
  position:fixed;inset:0;background:rgba(11,18,32,.62);z-index:70;
  opacity:0;pointer-events:none;transition:opacity .3s ease;
}
.drawer-mask.open{opacity:1;pointer-events:auto;}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(320px,86vw);z-index:80;
  background:var(--dark);border-left:1px solid var(--line-dark);
  padding:24px 20px;display:flex;flex-direction:column;gap:4px;overflow-y:auto;
  transform:translateX(100%);transition:transform .3s cubic-bezier(.22,.61,.36,1);
}
.drawer.open{transform:translateX(0);}
.drawer .drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px;}
.drawer .drawer-close{width:40px;height:40px;border-radius:50%;border:1px solid var(--line-dark);color:#93A3BC;font-size:18px;line-height:1;}
.drawer .drawer-close:hover{color:#fff;border-color:rgba(61,225,240,.5);}
.drawer a.drawer-link{
  display:block;padding:14px 10px;color:#C6D2E4;font-size:15px;
  border-bottom:1px solid var(--line-dark);border-left:3px solid transparent;
  transition:color .2s ease,border-color .2s ease,padding-left .2s ease;
}
.drawer a.drawer-link:hover,.drawer a.drawer-link.active{color:#fff;border-left-color:var(--cyan);padding-left:16px;}
.drawer .btn-cta{margin-top:22px;width:100%;}

/* ============ 页面头部 ============ */
.page-head{position:relative;background:var(--dark);padding:32px 0 108px;overflow:hidden;}
.page-head::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;opacity:.24;
}
.page-head::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(11,18,32,.66) 0%,rgba(11,18,32,.9) 68%,#0B1220 100%);
}
.page-head .container{position:relative;z-index:2;}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:#93A3BC;}
.crumb a{color:#93A3BC;transition:color .2s ease;}
.crumb a:hover{color:var(--cyan);}
.crumb .sep{color:#39465F;}
.crumb-current{color:#E6EDF7;max-width:56ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.badge{
  display:inline-flex;align-items:center;gap:6px;padding:5px 12px;border-radius:999px;
  font-size:12px;font-weight:600;background:var(--blue-t);color:var(--blue);
}
.badge-dark{
  background:rgba(61,225,240,.12);color:var(--cyan);
  border:1px solid rgba(61,225,240,.38);
}
.page-title{
  font-size:34px;line-height:1.3;font-weight:700;color:#F2F6FC;
  margin:16px 0 18px;max-width:900px;
}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:12px;font-size:13px;color:#93A3BC;}
.meta-row i{display:inline-block;width:1px;height:12px;background:#2A3854;}
.meta-row .sep-dot{color:#2A3854;}

/* ============ 正文布局 ============ */
.article-main{padding:0 0 24px;}
.article-layout{
  display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:40px;align-items:start;
  margin-top:-68px;position:relative;z-index:3;
}
.article-card{
  background:var(--card);border:1px solid var(--border);border-radius:var(--r-card);
  box-shadow:var(--sh1);padding:40px;
}
.article-body{max-width:760px;margin:0 auto;font-size:16px;line-height:1.85;color:var(--txt);}
.article-body h2{
  position:relative;font-size:24px;line-height:1.4;color:var(--ink);font-weight:700;
  margin:38px 0 14px;padding-left:14px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:2px;background:var(--blue);
}
.article-body h3{font-size:19px;line-height:1.5;color:var(--ink);font-weight:700;margin:28px 0 10px;}
.article-body h4{font-size:17px;color:var(--ink);font-weight:600;margin:22px 0 8px;}
.article-body p{margin:0 0 18px;}
.article-body ul,.article-body ol{margin:0 0 18px;padding-left:22px;list-style:disc;}
.article-body ol{list-style:decimal;}
.article-body li{margin-bottom:8px;}
.article-body ul li::marker{color:var(--blue);}
.article-body ol li::marker{color:var(--blue);font-weight:600;}
.article-body blockquote{
  margin:24px 0;padding:16px 20px;background:var(--bg);
  border-left:4px solid var(--orange);border-radius:0 10px 10px 0;color:#33415C;
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{width:100%;height:auto;border-radius:var(--r-img);margin:20px 0 8px;}
.article-body a{color:var(--blue);text-decoration:underline;text-underline-offset:3px;}
.article-body a:hover{color:var(--blue-d);}
.article-body strong{color:var(--ink);font-weight:600;}
.article-body code{background:var(--bg);border:1px solid var(--border);border-radius:6px;padding:2px 6px;font-size:14px;}
.article-body table{width:100%;border-collapse:collapse;margin:20px 0;font-size:14px;}
.article-body th,.article-body td{border:1px solid var(--border);padding:10px 12px;text-align:left;}
.article-body th{background:var(--bg);color:var(--ink);font-weight:600;}
.article-body hr{border:none;border-top:1px solid var(--split);margin:32px 0;}

.article-foot{
  max-width:760px;margin:32px auto 0;padding-top:22px;border-top:1px solid var(--split);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;
}
.back-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--blue);transition:color .2s ease;}
.back-link:hover{color:var(--orange);}
.share-group{display:flex;align-items:center;gap:10px;}
.share-btn{
  display:inline-flex;align-items:center;gap:6px;height:38px;padding:0 14px;border-radius:999px;
  border:1px solid var(--border);background:#fff;color:var(--muted);font-size:13px;
  transition:border-color .2s ease,color .2s ease,box-shadow .2s ease;
}
.share-btn:hover{border-color:var(--blue);color:var(--blue);box-shadow:0 4px 14px rgba(17,70,200,.1);}
.share-btn svg{width:15px;height:15px;}

.empty-state{max-width:560px;margin:24px auto;text-align:center;padding:32px 16px;}
.empty-state .empty-icon{
  width:64px;height:64px;margin:0 auto 18px;border-radius:18px;display:grid;place-items:center;
  background:var(--bg);border:1px solid var(--border);color:var(--muted);
}
.empty-state h2{font-size:20px;color:var(--ink);font-weight:700;margin:0 0 10px;}
.empty-state p{font-size:14px;color:var(--muted);margin:0 0 22px;}
.empty-state .btn-cta{height:44px;}

/* ============ 侧栏 ============ */
.article-aside{position:sticky;top:88px;display:flex;flex-direction:column;gap:16px;}
.aside-card{
  background:#fff;border:1px solid var(--border);border-radius:var(--r-card);
  padding:20px;box-shadow:var(--sh1);
}
.aside-title{font-size:14px;font-weight:700;color:var(--ink);margin:0 0 14px;padding-left:10px;position:relative;}
.aside-title::before{content:"";position:absolute;left:0;top:3px;bottom:3px;width:3px;border-radius:2px;background:var(--orange);}
.aside-info li{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:9px 0;border-bottom:1px dashed var(--split);font-size:13px;
}
.aside-info li:last-child{border-bottom:none;}
.aside-info span{color:var(--muted);}
.aside-info strong{color:var(--ink);font-weight:600;text-align:right;}
.aside-list{display:flex;flex-direction:column;}
.aside-list a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:10px 0;font-size:14px;color:var(--txt);border-bottom:1px dashed var(--split);
  transition:color .2s ease,padding-left .2s ease;
}
.aside-list a:last-child{border-bottom:none;}
.aside-list a:hover{color:var(--blue);padding-left:4px;}
.aside-list a em{font-style:normal;color:#B4BFD1;}
.aside-cta{background:var(--dark);border:1px solid var(--line-dark);color:#93A3BC;}
.aside-cta h3{font-size:15px;font-weight:700;color:#E6EDF7;margin:0 0 8px;}
.aside-cta p{font-size:13px;line-height:1.75;margin:0 0 16px;color:#93A3BC;}
.aside-cta .btn-cta{width:100%;height:42px;font-size:14px;}

/* ============ 延伸阅读 ============ */
.section{padding:64px 0;}
.section-related{padding-top:16px;}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:26px;}
.sec-title{position:relative;font-size:24px;font-weight:700;color:var(--ink);margin:0;padding-bottom:10px;line-height:1.35;}
.sec-title::after{content:"";position:absolute;left:0;bottom:0;width:32px;height:3px;border-radius:2px;background:var(--orange);}
.sec-more{font-size:14px;font-weight:600;color:var(--blue);transition:color .2s ease;}
.sec-more:hover{color:var(--orange);}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.rel-card{
  display:flex;flex-direction:column;background:#fff;border:1px solid var(--border);
  border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh1);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.rel-card:hover{transform:translateY(-2px);box-shadow:var(--sh2);border-color:#CFDCF7;}
.rel-thumb{aspect-ratio:4/3;overflow:hidden;background:var(--bg);}
.rel-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .45s ease;}
.rel-card:hover .rel-thumb img{transform:scale(1.04);}
.rel-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1;}
.rel-title{
  font-size:16px;font-weight:600;color:var(--ink);line-height:1.55;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.rel-desc{
  font-size:13px;color:var(--muted);line-height:1.7;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.rel-meta{margin-top:auto;font-size:12px;color:#9AA6BA;letter-spacing:.02em;}

/* ============ 页脚 ============ */
.site-footer{background:var(--dark);border-top:1px solid var(--line-dark);padding:56px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1.2fr;gap:32px;}
.footer-brand .brand{margin-bottom:14px;}
.footer-desc{font-size:14px;line-height:1.85;color:#93A3BC;margin:0;max-width:36ch;}
.footer-col h4{font-size:14px;font-weight:600;color:#E6EDF7;margin:0 0 14px;}
.footer-col a{display:block;font-size:14px;color:#93A3BC;padding:6px 0;transition:color .2s ease;}
.footer-col a:hover{color:var(--cyan);}
.footer-col p{font-size:13px;line-height:1.85;color:#93A3BC;margin:0 0 8px;}
.footer-bottom{
  margin-top:40px;border-top:1px solid var(--line-dark);padding:18px 0 22px;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px;
  font-size:13px;color:#7A879D;
}

/* ============ 响应式 ============ */
@media (max-width:1024px){
  .article-layout{grid-template-columns:1fr;gap:24px;}
  .article-aside{position:static;flex-direction:row;flex-wrap:wrap;}
  .aside-card{flex:1 1 260px;}
  .related-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:768px){
  .main-nav{display:none;}
  .header-actions{display:none;}
  .nav-toggle{display:inline-flex;}
  .header-inner{height:60px;}
  .site-header.shrink .header-inner{height:56px;}
  .page-head{padding:24px 0 88px;}
  .page-title{font-size:26px;margin:12px 0 14px;}
  .article-layout{margin-top:-56px;}
  .article-card{padding:24px 18px;}
  .article-body h2{font-size:21px;margin-top:30px;}
  .article-body h3{font-size:18px;}
  .section{padding:48px 0;}
  .section-related{padding-top:8px;}
  .sec-title{font-size:21px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:24px;}
}
@media (max-width:520px){
  .container{padding:0 16px;}
  .page-title{font-size:22px;}
  .meta-row{font-size:12px;gap:8px;}
  .crumb{font-size:12px;}
  .crumb-current{max-width:34ch;}
  .related-grid{grid-template-columns:1fr;}
  .article-aside{flex-direction:column;}
  .aside-card{flex:1 1 auto;}
  .brand-text strong{font-size:15px;}
  .brand-text em{font-size:10px;letter-spacing:.1em;}
  .article-foot{flex-direction:column;align-items:flex-start;}
  .share-group{width:100%;}
  .share-btn{flex:1;justify-content:center;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}

/* roulang page: category1 */
:root{
  --blue:#1146C8;
  --blue-hover:#0D38A6;
  --blue-tint:#E8EEFC;
  --orange:#FF6A1F;
  --orange-hover:#E85A12;
  --cyan:#3DE1F0;
  --dark:#0B1220;
  --dark-line:#1B2740;
  --ink:#101828;
  --body:#41506B;
  --muted:#7A879D;
  --bg:#F6F8FC;
  --card:#FFFFFF;
  --line:#E3E9F2;
  --line-soft:#EEF2F8;
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --r-pill:999px;
  --shadow-1:0 2px 8px rgba(16,24,40,.06);
  --shadow-2:0 14px 30px rgba(17,70,200,.12);
  --font-cn:"PingFang SC","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-num:Inter,"PingFang SC","Microsoft YaHei",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.85;
  color:var(--body);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  padding-bottom:0;
}
img{display:block;max-width:100%;height:auto;border-radius:var(--r-img)}
a{color:inherit;text-decoration:none;transition:color .2s ease}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{color:var(--ink);line-height:1.25;font-weight:700;margin:0}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--blue);outline-offset:3px;border-radius:6px}
.site-header :focus-visible,.site-footer :focus-visible,.page-hero :focus-visible,.cta-banner :focus-visible{outline-color:var(--cyan)}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section-tight{padding:64px 0}
.section-head{max-width:720px;margin-bottom:40px}
.section-head h2{font-size:32px;letter-spacing:.2px}
.section-head h2::after{content:"";display:block;width:32px;height:3px;border-radius:999px;background:var(--orange);margin-top:14px}
.section-head p{margin-top:12px;color:var(--body);font-size:16px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;letter-spacing:1px;color:var(--blue);text-transform:uppercase;margin-bottom:14px}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:var(--dark);
  border-bottom:1px solid var(--dark-line);
  transition:box-shadow .25s ease;
}
.site-header.scrolled{box-shadow:0 8px 24px rgba(11,18,32,.35)}
.header-inner{display:flex;align-items:center;gap:28px;height:68px;transition:height .25s ease}
.site-header.scrolled .header-inner{height:60px}
.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto;padding:6px;border-radius:10px;min-height:44px}
.brand-mark{
  width:32px;height:32px;flex:0 0 32px;display:grid;place-items:center;
  border-radius:9px;background:linear-gradient(135deg,#2A66F0,#1146C8);
  color:#fff;font-family:var(--font-num);font-size:13px;font-weight:700;letter-spacing:.4px;
  box-shadow:0 0 0 1px rgba(61,225,240,.28),0 0 14px rgba(61,225,240,.20);
}
.brand-text{display:flex;flex-direction:column;line-height:1.2}
.brand-text strong{color:#fff;font-size:15px;font-weight:700;letter-spacing:.2px}
.brand-text em{font-style:normal;font-size:11px;color:#93A3BC;letter-spacing:1.4px;margin-top:3px}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.main-nav a{
  position:relative;display:inline-flex;align-items:center;
  padding:10px 14px;min-height:44px;border-radius:8px;
  color:#C6D2E4;font-size:15px;font-weight:500;transition:color .2s ease;
}
.main-nav a::after{
  content:"";position:absolute;left:14px;right:14px;bottom:6px;height:2px;
  background:var(--cyan);border-radius:2px;
  transform:scaleX(0);transform-origin:left center;transition:transform .2s ease;
  box-shadow:0 0 10px rgba(61,225,240,.6);
}
.main-nav a:hover{color:#fff}
.main-nav a:hover::after{transform:scaleX(1)}
.main-nav a.active{color:#fff;text-shadow:0 0 10px rgba(61,225,240,.55)}
.main-nav a.active::after{transform:scaleX(1)}
.header-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;height:48px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;cursor:pointer;
  border:1px solid transparent;background:transparent;
  transition:background .2s ease,color .2s ease,box-shadow .2s ease,transform .2s ease,border-color .2s ease;
  white-space:nowrap;
}
.btn-sm{height:40px;min-height:40px;padding:0 16px;font-size:14px;border-radius:9px}
.btn-primary{background:var(--orange);color:#0B1220}
.btn-primary:hover{background:var(--orange-hover);color:#fff;box-shadow:0 10px 22px rgba(255,106,31,.30);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0);box-shadow:none}
.btn-outline{border-color:var(--blue);color:var(--blue);background:transparent}
.btn-outline:hover{background:var(--blue-tint);box-shadow:0 8px 18px rgba(17,70,200,.10)}
.btn-ghost-dark{border-color:rgba(255,255,255,.24);color:#E6EDF7}
.btn-ghost-dark:hover{border-color:var(--cyan);color:#fff;box-shadow:0 0 14px rgba(61,225,240,.28)}
.btn-block{width:100%}

/* ---------- mobile nav ---------- */
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:10px;
  border:1px solid rgba(255,255,255,.2);background:transparent;cursor:pointer;padding:0;
  align-items:center;justify-content:center;flex-direction:column;gap:5px;
}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:#E6EDF7;transition:transform .2s ease,opacity .2s ease}
.mobile-drawer{
  position:fixed;top:0;right:0;bottom:0;width:300px;max-width:86vw;z-index:120;
  background:#0B1220;border-left:1px solid var(--dark-line);
  transform:translateX(100%);transition:transform .28s ease;
  display:flex;flex-direction:column;padding:24px;gap:8px;
}
.mobile-drawer.open{transform:translateX(0)}
.drawer-backdrop{
  position:fixed;inset:0;background:rgba(6,11,22,.62);z-index:110;
  opacity:0;pointer-events:none;transition:opacity .28s ease;
}
.drawer-backdrop.open{opacity:1;pointer-events:auto}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:16px;border-bottom:1px solid var(--dark-line);margin-bottom:8px}
.drawer-head strong{color:#fff;font-size:15px}
.drawer-close{width:40px;height:40px;border-radius:10px;border:1px solid rgba(255,255,255,.18);background:transparent;color:#C6D2E4;font-size:20px;line-height:1;cursor:pointer}
.drawer-nav{display:flex;flex-direction:column;gap:2px;margin-top:8px}
.drawer-nav a{
  display:flex;align-items:center;min-height:48px;padding:0 12px;border-radius:10px;
  color:#C6D2E4;font-size:15px;font-weight:500;opacity:0;transform:translateX(12px);
  transition:background .2s ease,color .2s ease;
}
.mobile-drawer.open .drawer-nav a{animation:drawerIn .32s ease forwards}
.mobile-drawer.open .drawer-nav a:nth-child(1){animation-delay:.06s}
.mobile-drawer.open .drawer-nav a:nth-child(2){animation-delay:.11s}
.mobile-drawer.open .drawer-nav a:nth-child(3){animation-delay:.16s}
.mobile-drawer.open .drawer-nav a:nth-child(4){animation-delay:.21s}
@keyframes drawerIn{to{opacity:1;transform:translateX(0)}}
.drawer-nav a:hover{background:rgba(61,225,240,.08);color:#fff}
.drawer-nav a.active{color:#fff;background:rgba(61,225,240,.10);box-shadow:inset 3px 0 0 var(--cyan)}
.drawer-cta{margin-top:auto}

/* ---------- hero ---------- */
.page-hero{position:relative;overflow:hidden;background:var(--dark);color:#E6EDF7;isolation:isolate}
.page-hero::before{
  content:"";position:absolute;inset:0;z-index:-2;
  background:url(/assets/images/backpic/back-1.webp) center/cover no-repeat;
  opacity:.34;
}
.page-hero::after{
  content:"";position:absolute;inset:0;z-index:-1;
  background:linear-gradient(96deg,rgba(11,18,32,.95) 0%,rgba(11,18,32,.72) 52%,rgba(11,18,32,.88) 100%);
}
.hero-inner{position:relative;padding:56px 0 72px;display:grid;grid-template-columns:1.12fr .88fr;gap:56px;align-items:center}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:#93A3BC;margin-bottom:20px}
.crumb a{color:#93A3BC}
.crumb a:hover{color:var(--cyan)}
.crumb span.sep{color:#3A4A66}
.crumb strong{color:#E6EDF7;font-weight:500}
.hero-tagline{display:inline-flex;align-items:center;gap:10px;padding:6px 14px;border-radius:var(--r-pill);border:1px solid rgba(61,225,240,.35);background:rgba(61,225,240,.10);font-size:12px;letter-spacing:1px;color:#B9F2F9;margin-bottom:20px}
.pulse-dot{width:8px;height:8px;border-radius:50%;background:var(--cyan);box-shadow:0 0 0 0 rgba(61,225,240,.6);animation:pulse 2s infinite}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(61,225,240,.55)}70%{box-shadow:0 0 0 10px rgba(61,225,240,0)}100%{box-shadow:0 0 0 0 rgba(61,225,240,0)}}
.page-hero h1{font-size:44px;line-height:1.2;color:#fff;letter-spacing:.2px}
.page-hero h1 .hl{color:var(--cyan);text-shadow:0 0 18px rgba(61,225,240,.35)}
.hero-sub{margin-top:18px;font-size:18px;color:#B7C4D8;max-width:560px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.hero-stats{display:flex;flex-wrap:wrap;align-items:stretch;margin-top:36px;border-top:1px solid rgba(255,255,255,.12);padding-top:22px}
.hero-stat{padding-right:28px;margin-right:28px;border-right:1px solid rgba(255,255,255,.14)}
.hero-stat:last-child{border-right:0;margin-right:0;padding-right:0}
.hero-stat b{display:block;font-family:var(--font-num);font-size:28px;font-weight:700;color:#fff;line-height:1.2}
.hero-stat span{display:block;font-size:12px;color:#93A3BC;letter-spacing:.6px;margin-top:4px}
.hero-figure{position:relative;border-radius:var(--r-img);overflow:hidden;border:1px solid rgba(255,255,255,.16);box-shadow:0 24px 52px rgba(4,9,20,.55)}
.hero-figure img{width:100%;aspect-ratio:4/3;object-fit:cover}
.hero-figure figcaption{
  position:absolute;left:0;right:0;bottom:0;padding:14px 18px;font-size:12px;color:#DCE6F5;
  background:linear-gradient(180deg,rgba(11,18,32,0),rgba(11,18,32,.88));
}

/* ---------- live strip ---------- */
.live-strip{padding:0 0 8px;margin-top:-34px;position:relative;z-index:5}
.live-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--shadow-1);padding:18px 24px;
  display:flex;flex-wrap:wrap;align-items:center;gap:16px 28px;
}
.live-left{display:flex;align-items:center;gap:12px;font-size:14px;color:var(--ink);font-weight:600}
.live-meta{font-size:13px;color:var(--muted)}
.live-tags{display:flex;flex-wrap:wrap;gap:8px;margin-left:auto}
.badge{display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:var(--r-pill);background:var(--blue-tint);color:var(--blue);font-size:12px;font-weight:600;letter-spacing:.2px}
.badge-orange{background:rgba(255,106,31,.12);color:var(--orange-hover)}
.badge-plain{background:#F1F4FA;color:#6A7893}

/* ---------- split section ---------- */
.split{display:grid;grid-template-columns:300px 1fr;gap:64px;align-items:start}
.split-aside{position:sticky;top:104px}
.split-aside h2{font-size:30px}
.split-aside h2::after{content:"";display:block;width:32px;height:3px;border-radius:999px;background:var(--orange);margin-top:14px}
.split-aside p{margin-top:14px;font-size:15px;color:var(--body)}
.split-aside .btn{margin-top:24px}
.point-list{border-top:1px solid var(--line)}
.point-item{
  display:grid;grid-template-columns:64px 1fr 26px;gap:20px;align-items:start;
  padding:26px 4px;border-bottom:1px solid var(--line);
  transition:background .2s ease,padding-left .2s ease;border-radius:10px;
}
.point-item:hover{background:#fff;padding-left:16px;box-shadow:var(--shadow-1)}
.point-num{font-family:var(--font-num);font-size:26px;font-weight:700;color:var(--orange);line-height:1.2}
.point-body h3{font-size:18px;margin-bottom:8px}
.point-body p{font-size:15px;color:var(--body);max-width:620px}
.point-arrow{color:var(--blue);display:grid;place-items:center;transition:transform .2s ease}
.point-item:hover .point-arrow{transform:translateX(4px)}

/* ---------- timeline ---------- */
.timeline{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.tl-card{
  position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:26px 24px 24px;box-shadow:var(--shadow-1);
  transition:transform .2s ease,box-shadow .2s ease;
}
.tl-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2)}
.tl-card::before{content:"";position:absolute;left:24px;top:0;width:40px;height:3px;border-radius:0 0 4px 4px;background:var(--blue)}
.tl-card h3{font-size:19px;margin-bottom:10px}
.tl-card p{font-size:15px}
.tl-step{display:inline-flex;align-items:center;gap:8px;font-family:var(--font-num);font-size:12px;font-weight:600;letter-spacing:1px;color:var(--muted);margin-bottom:12px}
.tl-card ul{margin-top:16px;display:flex;flex-direction:column;gap:10px}
.tl-card li{position:relative;padding-left:18px;font-size:14px;color:var(--body)}
.tl-card li::before{content:"";position:absolute;left:0;top:10px;width:6px;height:6px;border-radius:2px;background:var(--blue)}

/* ---------- feature rows ---------- */
.feature-row{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;margin-bottom:48px}
.feature-row:last-child{margin-bottom:0}
.feature-figure{border-radius:var(--r-img);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow-1);background:#fff}
.feature-figure img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:0}
.feature-row.reverse .feature-figure{order:2}
.feature-text h3{font-size:24px;margin-bottom:12px}
.feature-text p{font-size:16px;margin-bottom:14px}
.feature-list{display:flex;flex-direction:column;gap:10px;margin-top:6px}
.feature-list li{display:flex;gap:10px;align-items:flex-start;font-size:15px;color:var(--body)}
.check-ico{flex:0 0 20px;width:20px;height:20px;border-radius:50%;background:var(--blue-tint);color:var(--blue);display:grid;place-items:center;margin-top:5px}

/* ---------- audience ---------- */
.audience-wrap{display:grid;grid-template-columns:.9fr 1.1fr;gap:56px;align-items:start}
.audience-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:32px;box-shadow:var(--shadow-1)}
.audience-list li{display:flex;gap:14px;padding:16px 0;border-bottom:1px solid var(--line-soft);font-size:15px}
.audience-list li:last-child{border-bottom:0;padding-bottom:0}
.audience-list strong{color:var(--ink);display:block;font-size:15px;margin-bottom:2px}
.audience-list span{color:var(--body);font-size:14px}
.num-chip{flex:0 0 32px;width:32px;height:32px;border-radius:9px;background:var(--blue-tint);color:var(--blue);display:grid;place-items:center;font-family:var(--font-num);font-size:13px;font-weight:700}

/* ---------- faq ---------- */
.faq-wrap{display:grid;grid-template-columns:.8fr 1.2fr;gap:56px;align-items:start}
.faq-list{display:flex;flex-direction:column;gap:12px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;transition:box-shadow .2s ease,border-color .2s ease}
.faq-item.open{border-color:#CBD8EF;box-shadow:var(--shadow-1)}
.faq-q{
  width:100%;display:flex;align-items:center;gap:16px;justify-content:space-between;
  padding:18px 22px;background:transparent;border:0;cursor:pointer;text-align:left;
  font-size:16px;font-weight:600;color:var(--ink);min-height:56px;transition:color .2s ease;
}
.faq-q:hover{color:var(--blue)}
.faq-item.open .faq-q{color:var(--blue);box-shadow:inset 4px 0 0 var(--orange)}
.faq-icon{flex:0 0 24px;width:24px;height:24px;display:grid;place-items:center;color:var(--muted);transition:transform .25s ease,color .25s ease}
.faq-item.open .faq-icon{transform:rotate(45deg);color:var(--orange)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-a p{padding:0 22px 20px 22px;font-size:15px;color:var(--body)}

/* ---------- cta banner ---------- */
.cta-banner{position:relative;overflow:hidden;background:var(--dark);color:#E6EDF7;isolation:isolate}
.cta-banner::before{
  content:"";position:absolute;inset:0;z-index:-2;
  background:url(/assets/images/backpic/back-3.webp) center/cover no-repeat;opacity:.28;
}
.cta-banner::after{
  content:"";position:absolute;inset:0;z-index:-1;
  background:linear-gradient(90deg,rgba(11,18,32,.95),rgba(11,18,32,.66));
}
.cta-inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:28px;padding:56px 0}
.cta-inner h2{color:#fff;font-size:30px}
.cta-inner p{margin-top:10px;color:#B7C4D8;font-size:15px;max-width:560px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px}

/* ---------- footer ---------- */
.site-footer{background:var(--dark);color:#93A3BC;padding:64px 0 28px;border-top:1px solid var(--dark-line)}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px}
.footer-brand .brand{padding-left:0}
.footer-desc{margin-top:16px;font-size:14px;line-height:1.85;color:#93A3BC;max-width:320px}
.footer-col h4{font-size:14px;color:#fff;margin-bottom:16px;font-weight:600}
.footer-col a{display:flex;align-items:center;min-height:32px;font-size:14px;color:#93A3BC}
.footer-col a:hover{color:var(--cyan)}
.footer-col p{font-size:13px;line-height:1.85;margin-bottom:10px;color:#93A3BC}
.footer-bottom{
  margin-top:44px;padding-top:20px;border-top:1px solid var(--dark-line);
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;font-size:13px;color:#7C8DA8;
}

/* ---------- floating cta ---------- */
.float-cta{
  position:fixed;right:24px;top:58%;transform:translateY(-50%) translateX(16px);
  z-index:70;display:flex;align-items:center;gap:12px;
  padding:14px 20px;border-radius:var(--r-pill);
  background:var(--blue);color:#fff;box-shadow:0 14px 30px rgba(17,70,200,.32);
  opacity:0;pointer-events:none;transition:opacity .3s ease,transform .3s ease,background .2s ease;
}
.float-cta.show{opacity:1;pointer-events:auto;transform:translateY(-50%) translateX(0)}
.float-cta:hover{background:var(--blue-hover);transform:translateY(-50%) translateX(-4px);box-shadow:0 18px 36px rgba(17,70,200,.42)}
.float-cta-icon{width:34px;height:34px;border-radius:50%;background:rgba(255,255,255,.16);display:grid;place-items:center;flex:0 0 34px}
.float-cta-text{display:flex;flex-direction:column;line-height:1.3}
.float-cta-text strong{font-size:14px;font-weight:700}
.float-cta-text em{font-style:normal;font-size:12px;color:#D5E2FF}
.mobile-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:75;display:none;
  align-items:center;justify-content:space-between;gap:14px;
  padding:10px 16px calc(10px + env(safe-area-inset-bottom));
  background:#fff;border-top:1px solid var(--line);box-shadow:0 -6px 20px rgba(16,24,40,.08);
}
.mobile-bar-text{font-size:13px;color:var(--body);line-height:1.4}

/* ---------- responsive ---------- */
@media (max-width:1100px){
  .split{grid-template-columns:1fr;gap:32px}
  .split-aside{position:static}
  .hero-inner{grid-template-columns:1fr;gap:36px}
  .page-hero h1{font-size:38px}
  .audience-wrap,.faq-wrap{grid-template-columns:1fr;gap:32px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:900px){
  .main-nav,.header-actions{display:none}
  .nav-toggle{display:flex;margin-left:auto}
  .timeline{grid-template-columns:1fr}
  .feature-row{grid-template-columns:1fr;gap:24px;margin-bottom:40px}
  .feature-row.reverse .feature-figure{order:0}
  .section{padding:72px 0}
  .section-head h2{font-size:28px}
  .float-cta{display:none}
  .mobile-bar{display:flex}
  body{padding-bottom:76px}
}
@media (max-width:768px){
  .page-hero h1{font-size:30px}
  .hero-sub{font-size:16px}
  .hero-inner{padding:40px 0 56px}
  .hero-stats{gap:0;flex-wrap:wrap}
  .hero-stat{padding-right:20px;margin-right:20px;margin-bottom:12px}
  .point-item{grid-template-columns:44px 1fr;gap:14px}
  .point-arrow{display:none}
  .live-card{padding:16px 18px}
  .live-tags{margin-left:0}
  .cta-inner{padding:44px 0}
  .cta-inner h2{font-size:24px}
}
@media (max-width:520px){
  .container{padding:0 16px}
  .page-hero h1{font-size:26px}
  .section{padding:56px 0}
  .section-head h2,.split-aside h2{font-size:24px}
  .hero-actions .btn,.cta-actions .btn{width:100%}
  .hero-stat b{font-size:24px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .feature-text h3{font-size:20px}
  .audience-card{padding:22px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  html{scroll-behavior:auto}
}

/* roulang page: category3 */
:root{
  --blue:#1146C8;
  --blue-hover:#0D38A6;
  --blue-tint:#E8EEFC;
  --orange:#FF6A1F;
  --orange-hover:#E85A12;
  --cyan:#3DE1F0;
  --dark:#0B1220;
  --dark-line:#1B2740;
  --page:#F6F8FC;
  --card:#FFFFFF;
  --line:#E3E9F2;
  --divider:#EEF2F8;
  --t1:#101828;
  --t2:#41506B;
  --t3:#7A879D;
  --radius-card:14px;
  --radius-btn:10px;
  --radius-img:12px;
  --shadow-sm:0 2px 8px rgba(16,24,40,.06);
  --shadow-md:0 14px 30px rgba(17,70,200,.12);
  --space-block:96px;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
.site-body{
  margin:0;
  padding:0;
  background:var(--page);
  color:var(--t2);
  font-family:"PingFang SC","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.85;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
}
.site-body img{display:block;max-width:100%;height:auto;}
.site-body a{color:inherit;text-decoration:none;}
.site-body button{font-family:inherit;}
.site-body h1,.site-body h2,.site-body h3,.site-body h4{color:var(--t1);line-height:1.25;margin:0;font-weight:700;}
.site-body p{margin:0 0 18px;}
.site-body ul,.site-body ol{margin:0 0 18px;padding-left:0;list-style:none;}
:focus-visible{outline:2px solid var(--blue);outline-offset:2px;border-radius:4px;}
.container{max-width:1200px;margin:0 auto;padding:0 24px;width:100%;}
.doc-container{max-width:1120px;margin:0 auto;padding:0 24px;width:100%;}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:var(--dark);
  border-bottom:1px solid var(--dark-line);
  transition:box-shadow .25s ease,height .25s ease;
}
.site-header.scrolled{box-shadow:0 8px 24px rgba(11,18,32,.35);}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:68px;}
.site-header.scrolled .header-inner{height:60px;}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{
  width:32px;height:32px;border-radius:8px;flex-shrink:0;
  background:linear-gradient(135deg,#1146C8 0%,#3DE1F0 100%);
  color:#fff;font-size:13px;font-weight:800;line-height:1;
  display:grid;place-items:center;letter-spacing:.4px;
  font-family:Inter,"PingFang SC",system-ui,sans-serif;
}
.brand-text strong{display:block;color:#E6EDF7;font-size:15px;font-weight:600;line-height:1.3;letter-spacing:.2px;}
.brand-text em{display:block;font-style:normal;font-size:11px;color:#93A3BC;letter-spacing:1.2px;line-height:1.4;}
.main-nav{display:flex;align-items:center;gap:28px;}
.main-nav a{
  position:relative;display:inline-block;
  color:#C6D2E4;font-size:15px;font-weight:500;line-height:1;
  padding:8px 0;transition:color .2s ease-out;
}
.main-nav a::after{
  content:"";position:absolute;left:0;bottom:0;width:0;height:2px;
  background:var(--cyan);box-shadow:0 0 10px rgba(61,225,240,.6);
  transition:width .2s ease-out;
}
.main-nav a:hover{color:#FFFFFF;}
.main-nav a:hover::after{width:100%;}
.main-nav a.active{color:#FFFFFF;text-shadow:0 0 10px rgba(61,225,240,.55);}
.main-nav a.active::after{width:100%;}
.header-actions{display:flex;align-items:center;gap:12px;flex-shrink:0;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:48px;padding:0 24px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;line-height:1;cursor:pointer;
  border:1px solid transparent;text-align:center;
  transition:background .2s ease-out,color .2s ease-out,box-shadow .2s ease-out,transform .2s ease-out,border-color .2s ease-out;
}
.btn-sm{min-height:40px;padding:0 18px;font-size:14px;}
.btn-primary{background:var(--orange);color:#FFFFFF;box-shadow:0 8px 20px rgba(255,106,31,.24);}
.btn-primary:hover{background:var(--orange-hover);transform:translateY(-2px);box-shadow:0 12px 26px rgba(255,106,31,.32);}
.btn-primary:active{transform:translateY(0);}
.btn-outline{border-color:var(--blue);color:var(--blue);background:transparent;}
.btn-outline:hover{background:rgba(17,70,200,.08);transform:translateY(-2px);}
.btn-outline:active{transform:translateY(0);}
.btn-ghost{border-color:rgba(255,255,255,.2);color:#E6EDF7;background:transparent;border-radius:999px;}
.btn-ghost:hover{border-color:rgba(61,225,240,.65);color:#FFFFFF;background:rgba(61,225,240,.08);}
.btn-pill{border-radius:999px;}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:10px;
  border:1px solid rgba(255,255,255,.18);background:transparent;color:#E6EDF7;
  cursor:pointer;place-items:center;transition:border-color .2s ease-out;
}
.nav-toggle:hover{border-color:rgba(61,225,240,.6);}
.nav-overlay{
  position:fixed;inset:0;background:rgba(11,18,32,.6);z-index:75;
  opacity:0;pointer-events:none;transition:opacity .25s ease-out;
}
.nav-overlay.open{opacity:1;pointer-events:auto;}

/* ---------- Hero ---------- */
.page-hero{position:relative;background:var(--dark);overflow:hidden;padding:64px 0 56px;}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:url(/assets/images/backpic/back-1.webp);
  background-size:cover;background-position:center;opacity:.24;
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(96deg,rgba(11,18,32,.96) 0%,rgba(11,18,32,.78) 58%,rgba(11,18,32,.55) 100%);
}
.hero-inner{position:relative;z-index:2;max-width:840px;}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:#93A3BC;margin-bottom:20px;}
.crumbs a{color:#93A3BC;transition:color .2s ease-out;}
.crumbs a:hover{color:var(--cyan);}
.crumbs span.sep{color:#445270;}
.crumbs span.now{color:#C6D2E4;}
.hero-tag{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;font-size:12px;font-weight:600;
  color:var(--cyan);background:rgba(61,225,240,.1);
  border:1px solid rgba(61,225,240,.32);margin-bottom:20px;letter-spacing:.4px;
}
.hero-tag i{width:6px;height:6px;border-radius:50%;background:var(--cyan);box-shadow:0 0 8px rgba(61,225,240,.9);display:inline-block;}
.page-hero h1{color:#FFFFFF;font-size:36px;line-height:1.28;margin-bottom:16px;letter-spacing:.2px;}
.page-hero h1 b{color:var(--cyan);font-weight:700;}
.hero-sub{color:#C6D2E4;font-size:18px;line-height:1.7;margin-bottom:10px;max-width:700px;}
.hero-note{color:#93A3BC;font-size:14px;line-height:1.8;margin:0;max-width:720px;}
.hero-meta{display:flex;flex-wrap:wrap;gap:10px 24px;margin-top:26px;font-size:13px;color:#93A3BC;}
.hero-meta span{display:inline-flex;align-items:center;gap:7px;}
.hero-meta i{width:5px;height:5px;border-radius:50%;background:#3DE1F0;opacity:.8;display:inline-block;}

/* ---------- Section basics ---------- */
.section{padding:72px 0;}
.section-tight{padding:56px 0;}
.sec-head{max-width:720px;margin-bottom:36px;}
.sec-head h2{font-size:32px;margin-bottom:12px;}
.sec-head h2::after{content:"";display:block;width:32px;height:3px;border-radius:2px;background:var(--blue);margin-top:12px;}
.sec-head p{font-size:16px;color:var(--t2);margin:0;}

/* ---------- TOC pills ---------- */
.toc-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-sm);padding:24px 28px;
  display:flex;flex-wrap:wrap;align-items:center;gap:14px;
}
.toc-label{font-size:13px;font-weight:600;color:var(--t3);letter-spacing:1px;margin-right:6px;flex-shrink:0;}
.toc-pill{
  display:inline-flex;align-items:center;gap:8px;
  min-height:40px;padding:0 18px;border-radius:999px;
  font-size:14px;font-weight:500;color:var(--t2);
  background:var(--blue-tint);border:1px solid transparent;
  transition:all .2s ease-out;
}
.toc-pill span.num{font-family:Inter,system-ui,sans-serif;font-size:12px;font-weight:700;color:var(--blue);}
.toc-pill:hover{background:#DCE6FA;border-color:rgba(17,70,200,.28);color:var(--blue);transform:translateY(-2px);}

/* ---------- Doc layout ---------- */
.doc-layout{display:grid;grid-template-columns:280px minmax(0,1fr);gap:48px;align-items:start;}
.doc-side{position:sticky;top:96px;}
.side-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-sm);padding:22px 20px;
}
.side-card h3{font-size:14px;letter-spacing:1px;color:var(--t3);font-weight:600;margin-bottom:14px;}
.side-nav{display:flex;flex-direction:column;gap:2px;}
.side-nav a{
  display:block;padding:11px 12px 11px 14px;font-size:14px;color:var(--t2);
  border-left:3px solid transparent;border-radius:0 8px 8px 0;line-height:1.55;
  transition:all .2s ease-out;
}
.side-nav a:hover{background:var(--divider);color:var(--blue);}
.side-nav a.active{color:var(--blue);font-weight:600;background:var(--blue-tint);border-left-color:var(--orange);}
.side-tip{margin-top:18px;padding-top:16px;border-top:1px solid var(--divider);font-size:13px;color:var(--t3);line-height:1.75;}
.side-cta{
  margin-top:18px;background:var(--blue);border-radius:var(--radius-card);padding:20px;
  color:#fff;position:relative;overflow:hidden;
}
.side-cta::after{
  content:"";position:absolute;right:-30px;top:-30px;width:100px;height:100px;border-radius:50%;
  background:rgba(61,225,240,.22);
}
.side-cta strong{display:block;font-size:15px;color:#fff;margin-bottom:6px;position:relative;z-index:1;}
.side-cta p{font-size:13px;color:rgba(230,237,247,.8);margin:0 0 14px;line-height:1.7;position:relative;z-index:1;}
.side-cta a{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:44px;padding:0 18px;border-radius:var(--radius-btn);
  background:#fff;color:var(--blue);font-size:14px;font-weight:600;
  position:relative;z-index:1;transition:all .2s ease-out;
}
.side-cta a:hover{background:var(--cyan);color:var(--dark);transform:translateY(-2px);}
.mobile-toc{display:none;margin-bottom:24px;}

/* ---------- Article body ---------- */
.doc-body{min-width:0;}
.doc-section{padding-bottom:44px;margin-bottom:44px;border-bottom:1px solid var(--divider);}
.doc-section:last-of-type{border-bottom:none;margin-bottom:0;padding-bottom:0;}
.doc-section h2{
  font-size:24px;margin-bottom:6px;padding-left:14px;position:relative;
}
.doc-section h2::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:2px;background:var(--blue);
}
.doc-kicker{
  display:block;font-family:Inter,system-ui,sans-serif;
  font-size:12px;font-weight:700;letter-spacing:1.6px;color:var(--orange);
  margin-bottom:10px;
}
.doc-section h3{font-size:19px;margin:26px 0 12px;}
.doc-section p{font-size:16px;line-height:1.85;color:var(--t2);}
.doc-section strong{color:var(--t1);font-weight:600;}
.doc-figure{margin:26px 0;border-radius:var(--radius-img);overflow:hidden;border:1px solid var(--line);background:var(--card);}
.doc-figure img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.doc-figure figcaption{font-size:13px;color:var(--t3);padding:12px 16px;background:var(--card);border-top:1px solid var(--divider);}
.step-list{display:flex;flex-direction:column;gap:2px;margin:22px 0;}
.step-item{
  display:flex;gap:16px;padding:16px 0;border-bottom:1px solid var(--divider);
}
.step-item:last-child{border-bottom:none;}
.step-num{
  flex-shrink:0;width:30px;height:30px;border-radius:9px;
  background:var(--blue-tint);color:var(--blue);
  font-family:Inter,system-ui,sans-serif;font-size:13px;font-weight:700;
  display:grid;place-items:center;margin-top:3px;
}
.step-item h4{font-size:16px;margin-bottom:4px;}
.step-item p{font-size:15px;margin:0;color:var(--t2);line-height:1.8;}
.check-list{display:flex;flex-direction:column;gap:12px;margin:20px 0;}
.check-list li{display:flex;gap:12px;font-size:15.5px;line-height:1.8;color:var(--t2);}
.check-list li svg{flex-shrink:0;margin-top:7px;color:var(--blue);}
.note-card{
  background:var(--card);border:1px solid var(--line);border-left:4px solid var(--orange);
  border-radius:8px;padding:18px 20px;margin:22px 0;
}
.note-card p{margin:0;font-size:15px;color:var(--t2);line-height:1.8;}
.note-card p b{color:var(--t1);}
.def-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:22px 0;}
.def-item{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:18px 20px;transition:all .2s ease-out;
}
.def-item:hover{box-shadow:var(--shadow-md);transform:translateY(-2px);border-color:#CFDBF1;}
.def-item h4{font-size:15px;margin-bottom:6px;color:var(--t1);}
.def-item p{font-size:14px;margin:0;color:var(--t2);line-height:1.75;}

/* ---------- FAQ ---------- */
.faq-wrap{background:var(--card);border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;box-shadow:var(--shadow-sm);}
.faq-item{border-bottom:1px solid var(--divider);}
.faq-item:last-child{border-bottom:none;}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 24px;background:transparent;border:none;cursor:pointer;
  text-align:left;font-size:16px;font-weight:600;color:var(--t1);line-height:1.6;
  min-height:44px;transition:color .2s ease-out,background .2s ease-out;
  position:relative;
}
.faq-q::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--orange);
  transform:scaleY(0);transform-origin:center;transition:transform .2s ease-out;
}
.faq-item.open .faq-q::before{transform:scaleY(1);}
.faq-q:hover{color:var(--blue);background:#FBFCFF;}
.faq-item.open .faq-q{color:var(--blue);}
.faq-icon{
  flex-shrink:0;width:26px;height:26px;border-radius:50%;
  border:1px solid var(--line);display:grid;place-items:center;color:var(--t3);
  transition:transform .25s ease-out,color .2s ease-out,border-color .2s ease-out;
}
.faq-item.open .faq-icon{transform:rotate(45deg);color:var(--blue);border-color:rgba(17,70,200,.4);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease-out;}
.faq-a-inner{padding:0 24px 22px;font-size:15px;color:var(--t2);line-height:1.85;}
.faq-a-inner p{margin:0;}
.faq-more{display:flex;justify-content:center;margin-top:32px;}

/* ---------- CTA banner ---------- */
.cta-banner{position:relative;background:var(--dark);overflow:hidden;padding:56px 0;}
.cta-banner::before{
  content:"";position:absolute;inset:0;
  background-image:url(/assets/images/backpic/back-2.png);
  background-size:cover;background-position:center;opacity:.18;
}
.cta-banner::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(11,18,32,.94) 0%,rgba(11,18,32,.7) 100%);
}
.cta-inner{position:relative;z-index:2;display:flex;align-items:center;justify-content:space-between;gap:36px;}
.cta-inner h2{color:#FFFFFF;font-size:28px;margin-bottom:10px;}
.cta-inner p{color:#93A3BC;font-size:15px;margin:0;max-width:620px;line-height:1.8;}
.cta-actions{display:flex;gap:12px;flex-shrink:0;}

/* ---------- Footer ---------- */
.site-footer{background:var(--dark);padding:64px 0 0;color:#93A3BC;}
.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-desc{font-size:14px;color:#93A3BC;line-height:1.85;margin:0;max-width:320px;}
.footer-col h4{font-size:14px;color:#FFFFFF;font-weight:600;margin-bottom:16px;letter-spacing:.5px;}
.footer-col a{display:block;font-size:14px;color:#93A3BC;line-height:1.6;padding:6px 0;transition:color .2s ease-out,transform .2s ease-out;}
.footer-col a:hover{color:var(--cyan);transform:translateX(3px);}
.footer-col p{font-size:14px;color:#93A3BC;line-height:1.85;margin:0 0 10px;}
.footer-bottom{
  border-top:1px solid var(--dark-line);
  padding:20px 0 24px;display:flex;flex-wrap:wrap;gap:10px 24px;
  align-items:center;justify-content:space-between;
  font-size:13px;color:#7A879D;
}

/* ---------- Floating CTA ---------- */
.float-cta{
  position:fixed;right:20px;top:56%;z-index:70;
  display:flex;flex-direction:column;align-items:center;gap:8px;
  width:98px;padding:16px 10px;border-radius:999px;
  background:var(--blue);color:#FFFFFF;text-align:center;
  box-shadow:0 14px 30px rgba(17,70,200,.3);
  opacity:0;transform:translateY(-50%) translateX(24px);pointer-events:none;
  transition:opacity .3s ease-out,transform .3s ease-out,box-shadow .2s ease-out;
}
.float-cta.show{opacity:1;transform:translateY(-50%) translateX(0);pointer-events:auto;}
.float-cta:hover{transform:translateY(-50%) translateX(-4px);box-shadow:0 18px 36px rgba(17,70,200,.4);}
.float-cta svg{color:var(--cyan);}
.float-cta span{font-size:12px;line-height:1.5;color:#E6EDF7;}
.float-cta b{display:block;font-size:13px;color:#FFFFFF;font-weight:600;}

/* ---------- Responsive ---------- */
@media (max-width:1024px){
  .doc-layout{grid-template-columns:230px minmax(0,1fr);gap:32px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .page-hero h1{font-size:30px;}
  .section{padding:64px 0;}
}
@media (max-width:900px){
  .main-nav{
    position:fixed;top:0;right:0;height:100vh;width:280px;
    background:var(--dark);border-left:1px solid var(--dark-line);
    flex-direction:column;align-items:stretch;gap:4px;
    padding:88px 20px 28px;z-index:90;
    transform:translateX(100%);transition:transform .3s ease-out;
    box-shadow:-16px 0 40px rgba(11,18,32,.45);
  }
  .main-nav.open{transform:translateX(0);}
  .main-nav a{padding:14px 12px;font-size:16px;border-radius:8px;}
  .main-nav a::after{display:none;}
  .main-nav a.active{background:rgba(61,225,240,.1);color:#FFFFFF;}
  .nav-toggle{display:grid;}
  .header-actions .btn-ghost{display:none;}
  .doc-layout{grid-template-columns:minmax(0,1fr);gap:0;}
  .doc-side{display:none;}
  .mobile-toc{display:block;}
  .cta-inner{flex-direction:column;align-items:flex-start;}
  .cta-actions{width:100%;}
  .cta-actions .btn{flex:1;}
  .float-cta{
    top:auto;bottom:0;left:0;right:0;width:100%;height:58px;
    border-radius:0;flex-direction:row;justify-content:space-between;
    padding:0 16px env(safe-area-inset-bottom,0);
    gap:12px;transform:translateY(100%);opacity:1;
    box-shadow:0 -6px 22px rgba(11,18,32,.28);
    background:var(--blue);
  }
  .float-cta.show{transform:translateY(0);pointer-events:auto;}
  .float-cta:hover{transform:translateY(0);}
  .float-cta span{font-size:13px;color:#FFFFFF;text-align:left;}
  .float-cta b{display:none;}
  .float-cta svg{display:none;}
  .site-body{padding-bottom:58px;}
}
@media (max-width:768px){
  .section{padding:56px 0;}
  .sec-head h2{font-size:24px;}
  .page-hero{padding:44px 0 40px;}
  .page-hero h1{font-size:26px;}
  .hero-sub{font-size:16px;}
  .doc-section h2{font-size:21px;}
  .def-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .toc-card{padding:18px 18px;}
  .toc-pill{font-size:13px;padding:0 14px;}
  .faq-q{padding:18px 18px;font-size:15px;}
  .faq-a-inner{padding:0 18px 20px;}
}
@media (max-width:480px){
  .container,.doc-container{padding:0 16px;}
  .page-hero h1{font-size:23px;}
  .hero-meta{font-size:12px;gap:8px 16px;}
  .btn{width:100%;}
  .header-actions .btn-sm{width:auto;}
  .toc-pill{width:100%;justify-content:flex-start;}
  .cta-actions{flex-direction:column;}
  .cta-inner h2{font-size:22px;}
  .footer-bottom{font-size:12px;}
}

/* roulang page: category2 */
:root{
  --blue:#1146C8;
  --blue-hover:#0D38A6;
  --blue-tint:#E8EEFC;
  --orange:#FF6A1F;
  --orange-hover:#E85A12;
  --cyan:#3DE1F0;
  --dark:#0B1220;
  --dark-2:#111A2C;
  --dark-line:#1B2740;
  --page:#F6F8FC;
  --card:#FFFFFF;
  --line:#E3E9F2;
  --divider:#EEF2F8;
  --text:#101828;
  --body:#41506B;
  --muted:#7A879D;
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --sh-1:0 2px 8px rgba(16,24,40,.06);
  --sh-2:0 14px 30px rgba(17,70,200,.12);
  --font-cn:"PingFang SC","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,Segoe UI,sans-serif;
  --font-num:"Inter",-apple-system,"Segoe UI",Roboto,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
html body.site-body{
  margin:0;
  font-family:var(--font-cn);
  background:var(--page);
  color:var(--body);
  font-size:16px;
  line-height:1.85;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;border:0;background:none;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
p{margin:0}
h1,h2,h3,h4{margin:0;color:var(--text);font-weight:700;line-height:1.25}
svg{display:block}
::selection{background:rgba(17,70,200,.14)}

a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible{
  outline:2px solid var(--blue);
  outline-offset:3px;
  border-radius:6px;
}
.site-header a:focus-visible,.site-footer a:focus-visible,.page-hero a:focus-visible,.cta-band a:focus-visible,.float-cta:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
}

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

/* ============ 顶栏 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:90;
  background:var(--dark);
  border-bottom:1px solid var(--dark-line);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:0 8px 24px rgba(11,18,32,.35)}
.header-inner{
  display:flex;
  align-items:center;
  gap:20px;
  height:68px;
  transition:height .25s ease;
}
.site-header.is-scrolled .header-inner{height:60px}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
}
.brand-mark{
  width:32px;height:32px;
  border-radius:9px;
  display:grid;
  place-items:center;
  font-family:var(--font-num);
  font-size:13px;
  font-weight:800;
  letter-spacing:.02em;
  color:#fff;
  background:linear-gradient(135deg,#1146C8 0%,#2C7BE5 55%,#3DE1F0 100%);
  box-shadow:0 0 0 1px rgba(61,225,240,.28),0 4px 12px rgba(17,70,200,.35);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text strong{font-size:15px;font-weight:700;color:#E6EDF7;letter-spacing:.01em}
.brand-text em{font-size:11px;font-style:normal;color:#93A3BC;letter-spacing:.06em;margin-top:2px}

.main-nav{
  display:flex;
  align-items:center;
  gap:2px;
  margin-left:10px;
}
.main-nav a{
  position:relative;
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:0 14px;
  font-size:15px;
  font-weight:500;
  color:#C6D2E4;
  border-radius:8px;
  transition:color .2s ease;
}
.main-nav a::after{
  content:"";
  position:absolute;
  left:14px;right:14px;bottom:6px;
  height:2px;
  border-radius:2px;
  background:var(--cyan);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .2s ease;
}
.main-nav a:hover{color:#fff}
.main-nav a:hover::after{transform:scaleX(1)}
.main-nav a.active{
  color:#fff;
  text-shadow:0 0 10px rgba(61,225,240,.55);
}
.main-nav a.active::after{transform:scaleX(1)}

.header-actions{
  margin-left:auto;
  display:flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
}
.btn-ghost{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:40px;
  padding:0 18px;
  font-size:14px;
  font-weight:500;
  color:#E6EDF7;
  border:1px solid rgba(255,255,255,.22);
  border-radius:999px;
  transition:border-color .2s ease,color .2s ease,background .2s ease;
}
.btn-ghost:hover{border-color:var(--cyan);color:#fff;background:rgba(61,225,240,.08)}
.btn-pill{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:42px;
  padding:0 22px;
  font-size:14px;
  font-weight:600;
  color:#fff;
  background:var(--orange);
  border-radius:999px;
  box-shadow:0 6px 18px rgba(255,106,31,.28);
  transition:background .2s ease,transform .2s ease,box-shadow .2s ease;
}
.btn-pill:hover{background:var(--orange-hover);transform:translateY(-1px);box-shadow:0 10px 24px rgba(255,106,31,.36)}

.nav-toggle{
  display:none;
  width:44px;height:44px;
  border-radius:10px;
  border:1px solid rgba(255,255,255,.18);
  align-items:center;
  justify-content:center;
  margin-left:auto;
}
.nav-toggle span{
  display:block;
  width:18px;height:2px;
  background:#E6EDF7;
  border-radius:2px;
  position:relative;
  transition:background .2s;
}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";
  position:absolute;left:0;
  width:18px;height:2px;
  background:#E6EDF7;
  border-radius:2px;
  transition:transform .2s ease;
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}

/* ============ 移动抽屉 ============ */
.drawer-mask{
  position:fixed;
  inset:0;
  background:rgba(11,18,32,.55);
  opacity:0;
  pointer-events:none;
  transition:opacity .25s ease;
  z-index:95;
}
.drawer-mask.show{opacity:1;pointer-events:auto}
.nav-drawer{
  position:fixed;
  top:0;right:0;
  width:min(320px,86vw);
  height:100%;
  background:var(--dark);
  border-left:1px solid var(--dark-line);
  z-index:96;
  transform:translateX(100%);
  transition:transform .3s cubic-bezier(.4,0,.2,1);
  display:flex;
  flex-direction:column;
  padding:20px 22px calc(24px + env(safe-area-inset-bottom));
  overflow-y:auto;
}
.nav-drawer.show{transform:translateX(0)}
.drawer-head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding-bottom:18px;
  border-bottom:1px solid var(--dark-line);
}
.drawer-close{
  width:40px;height:40px;
  border-radius:10px;
  border:1px solid rgba(255,255,255,.18);
  color:#E6EDF7;
  display:grid;
  place-items:center;
  font-size:20px;
  line-height:1;
}
.drawer-close:hover{border-color:var(--cyan);color:#fff}
.drawer-nav{display:flex;flex-direction:column;padding:16px 0 8px}
.drawer-nav a{
  display:flex;
  align-items:center;
  min-height:48px;
  padding:0 12px;
  font-size:15px;
  font-weight:500;
  color:#C6D2E4;
  border-radius:10px;
  opacity:0;
  transform:translateX(14px);
  transition:opacity .3s ease,transform .3s ease,background .2s,color .2s;
}
.nav-drawer.show .drawer-nav a{opacity:1;transform:translateX(0)}
.nav-drawer.show .drawer-nav a:nth-child(1){transition-delay:.06s}
.nav-drawer.show .drawer-nav a:nth-child(2){transition-delay:.12s}
.nav-drawer.show .drawer-nav a:nth-child(3){transition-delay:.18s}
.nav-drawer.show .drawer-nav a:nth-child(4){transition-delay:.24s}
.drawer-nav a:hover{background:rgba(61,225,240,.08);color:#fff}
.drawer-nav a.active{
  color:#fff;
  background:rgba(61,225,240,.10);
  box-shadow:inset 3px 0 0 var(--cyan);
  text-shadow:0 0 10px rgba(61,225,240,.45);
}
.drawer-cta{
  margin-top:auto;
  display:flex;
  align-items:center;
  justify-content:center;
  min-height:50px;
  border-radius:999px;
  background:var(--orange);
  color:#fff;
  font-size:15px;
  font-weight:600;
  box-shadow:0 8px 22px rgba(255,106,31,.32);
}
.drawer-cta:hover{background:var(--orange-hover)}

/* ============ 页面主视觉 ============ */
.page-hero{
  position:relative;
  overflow:hidden;
  background:var(--dark);
  padding:64px 0 60px;
}
.page-hero-bg{
  position:absolute;
  inset:0;
  background-size:cover;
  background-position:center;
  opacity:.26;
  filter:saturate(.85);
}
.page-hero::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(100deg,rgba(11,18,32,.97) 0%,rgba(11,18,32,.86) 44%,rgba(11,18,32,.56) 100%);
}
.page-hero-inner{position:relative;z-index:2}
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:6px;
  font-size:13px;
  color:#93A3BC;
  margin-bottom:22px;
}
.breadcrumb a{color:#93A3BC;transition:color .2s}
.breadcrumb a:hover{color:var(--cyan)}
.breadcrumb span{color:#4A5A75}
.breadcrumb em{font-style:normal;color:#C6D2E4}
.page-hero h1{
  color:#fff;
  font-size:44px;
  line-height:1.25;
  letter-spacing:-.01em;
  max-width:840px;
}
.page-hero h1 .hl{
  color:var(--cyan);
  text-shadow:0 0 18px rgba(61,225,240,.35);
}
.hero-sub{
  margin-top:16px;
  font-size:19px;
  line-height:1.6;
  color:#C6D2E4;
  max-width:720px;
}
.hero-lead{
  margin-top:12px;
  font-size:15px;
  line-height:1.9;
  color:#93A3BC;
  max-width:640px;
}
.chip-row{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:26px;
}
.chip{
  display:inline-flex;
  align-items:center;
  min-height:34px;
  padding:0 14px;
  font-size:13px;
  color:#C6D2E4;
  border:1px solid rgba(61,225,240,.26);
  background:rgba(61,225,240,.06);
  border-radius:999px;
  transition:border-color .2s,color .2s,background .2s;
}
.chip:hover{border-color:rgba(61,225,240,.6);color:#fff;background:rgba(61,225,240,.12)}

/* ============ 实时状态条 ============ */
.status-bar{
  background:var(--blue-tint);
  border-bottom:1px solid var(--line);
}
.status-inner{
  display:flex;
  align-items:center;
  gap:12px;
  flex-wrap:wrap;
  min-height:54px;
  padding-top:10px;
  padding-bottom:10px;
}
.status-dot{
  position:relative;
  width:8px;height:8px;
  border-radius:50%;
  background:var(--blue);
  flex:0 0 8px;
}
.status-dot::after{
  content:"";
  position:absolute;
  inset:-5px;
  border-radius:50%;
  border:1px solid rgba(17,70,200,.45);
  animation:pulse 2.2s ease-out infinite;
}
@keyframes pulse{
  0%{transform:scale(.6);opacity:.9}
  100%{transform:scale(1.5);opacity:0}
}
.status-text{font-size:14px;color:#2B3A55}
.status-link{
  margin-left:auto;
  font-size:14px;
  font-weight:600;
  color:var(--blue);
  transition:color .2s;
}
.status-link:hover{color:var(--blue-hover);text-decoration:underline;text-underline-offset:4px}

/* ============ 通用板块 ============ */
.section{padding:96px 0}
.section-alt{background:#fff}
.section-head{max-width:760px;margin-bottom:48px}
.eyebrow{
  display:inline-block;
  font-size:12px;
  font-weight:600;
  letter-spacing:.12em;
  color:var(--blue);
  background:var(--blue-tint);
  padding:4px 12px;
  border-radius:999px;
  margin-bottom:16px;
}
.section-head h2{font-size:32px}
.section-head h2::after{
  content:"";
  display:block;
  width:32px;
  height:3px;
  border-radius:2px;
  background:var(--orange);
  margin-top:14px;
}
.section-head p{margin-top:16px;font-size:16px;color:var(--body);max-width:660px}

/* ============ 功能卡 2×2 错位 ============ */
.feature-grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:28px;
}
.feature-card{
  display:flex;
  min-height:280px;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
  box-shadow:var(--sh-1);
  transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
}
.feature-card:nth-child(even){margin-top:32px}
.feature-card:hover{
  transform:translateY(-2px);
  box-shadow:var(--sh-2);
  border-color:#CBD8EE;
}
.feature-media{
  flex:0 0 40%;
  width:40%;
  position:relative;
  background:var(--page);
  border-right:1px solid var(--divider);
}
.feature-media img{
  width:100%;
  height:100%;
  object-fit:cover;
  border-radius:0;
}
.feature-card.reverse{flex-direction:row-reverse}
.feature-card.reverse .feature-media{border-right:0;border-left:1px solid var(--divider)}
.feature-body{
  flex:1 1 auto;
  min-width:0;
  padding:26px 24px;
  display:flex;
  flex-direction:column;
  gap:10px;
  justify-content:center;
}
.badge{
  align-self:flex-start;
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:12px;
  font-weight:600;
  letter-spacing:.02em;
  color:var(--blue);
  background:var(--blue-tint);
  padding:3px 10px;
  border-radius:999px;
}
.feature-body h3{font-size:21px;line-height:1.35}
.feature-body p{font-size:15px;line-height:1.85;color:var(--body)}
.mini-list{margin-top:4px;display:flex;flex-direction:column;gap:2px}
.mini-list li{
  position:relative;
  padding-left:18px;
  font-size:14px;
  line-height:1.9;
  color:var(--muted);
}
.mini-list li::before{
  content:"";
  position:absolute;
  left:0;top:.72em;
  width:6px;height:6px;
  border-radius:2px;
  background:var(--blue);
}

/* ============ 操作流程 ============ */
.flow-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:22px;
}
.flow-item{
  position:relative;
  background:#fff;
  border:1px solid var(--line);
  border-left:3px solid var(--blue);
  border-radius:var(--r-card);
  padding:24px 22px;
  box-shadow:var(--sh-1);
  transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s;
}
.flow-item:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-left-color:var(--orange)}
.flow-num{
  font-family:var(--font-num);
  font-size:26px;
  font-weight:800;
  color:var(--orange);
  line-height:1;
  letter-spacing:-.02em;
}
.flow-item h3{font-size:17px;margin-top:12px}
.flow-item p{font-size:14px;line-height:1.85;color:var(--body);margin-top:8px}

/* ============ 要点对照清单 ============ */
.check-block{
  display:grid;
  grid-template-columns:.9fr 1.4fr;
  gap:48px;
  align-items:start;
  padding:36px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--sh-1);
}
.check-block + .check-block{margin-top:24px}
.check-left h3{font-size:22px;line-height:1.4}
.check-left p{margin-top:12px;font-size:15px;line-height:1.9;color:var(--muted)}
.check-left .tag-line{
  display:inline-flex;
  align-items:center;
  margin-top:18px;
  font-size:13px;
  font-weight:600;
  color:var(--blue);
  background:var(--blue-tint);
  padding:4px 12px;
  border-radius:999px;
}
.check-list li{
  display:flex;
  align-items:flex-start;
  gap:12px;
  padding:12px 0;
  font-size:15px;
  line-height:1.8;
  color:var(--body);
  border-bottom:1px dashed var(--divider);
}
.check-list li:last-child{border-bottom:0}
.check-icon{
  flex:0 0 22px;
  width:22px;height:22px;
  margin-top:4px;
  border-radius:50%;
  background:var(--blue-tint);
  color:var(--blue);
  display:grid;
  place-items:center;
}

/* ============ 适用场景编号竖排 ============ */
.reason-wrap{display:grid;grid-template-columns:.8fr 1.6fr;gap:56px;align-items:start}
.reason-aside h2{font-size:32px}
.reason-aside h2::after{
  content:"";
  display:block;
  width:32px;height:3px;
  border-radius:2px;
  background:var(--orange);
  margin-top:14px;
}
.reason-aside p{margin-top:16px;font-size:15px;color:var(--body)}
.reason-list{border-top:1px solid var(--divider)}
.reason-item{
  display:flex;
  align-items:flex-start;
  gap:22px;
  padding:26px 4px;
  border-bottom:1px solid var(--divider);
  transition:background .2s ease,padding-left .2s ease;
}
.reason-item:hover{background:rgba(17,70,200,.03);padding-left:10px}
.reason-num{
  flex:0 0 44px;
  font-family:var(--font-num);
  font-size:16px;
  font-weight:800;
  color:var(--orange);
  line-height:1.6;
}
.reason-content h3{font-size:18px}
.reason-content p{font-size:15px;line-height:1.85;color:var(--body);margin-top:6px}

/* ============ FAQ ============ */
.faq-layout{display:grid;grid-template-columns:.8fr 1.2fr;gap:48px;align-items:start}
.faq-aside h2{font-size:32px}
.faq-aside h2::after{
  content:"";
  display:block;
  width:32px;height:3px;
  border-radius:2px;
  background:var(--orange);
  margin-top:14px;
}
.faq-aside p{margin-top:16px;font-size:15px;color:var(--body)}
.faq-aside .btn-outline{margin-top:24px}
.faq-list{display:flex;flex-direction:column;gap:12px}
.faq-item{
  position:relative;
  background:#fff;
  border:1px solid var(--line);
  border-radius:12px;
  overflow:hidden;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item::before{
  content:"";
  position:absolute;
  left:0;top:0;bottom:0;
  width:4px;
  background:var(--orange);
  transform:scaleY(0);
  transform-origin:top center;
  transition:transform .25s ease;
}
.faq-item.open{border-color:#C9D6F2;box-shadow:var(--sh-1)}
.faq-item.open::before{transform:scaleY(1)}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:18px 20px;
  text-align:left;
  font-size:16px;
  font-weight:600;
  color:var(--text);
  min-height:44px;
  transition:color .2s ease;
}
.faq-item.open .faq-q{color:var(--blue)}
.faq-icon{
  flex:0 0 20px;
  color:var(--blue);
  transition:transform .25s ease,color .25s ease;
}
.faq-item.open .faq-icon{transform:rotate(45deg);color:var(--orange)}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .3s ease;
}
.faq-a p{
  padding:0 20px 20px;
  font-size:15px;
  line-height:1.9;
  color:var(--body);
}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:48px;
  padding:0 26px;
  font-size:15px;
  font-weight:600;
  border-radius:var(--r-btn);
  border:1px solid transparent;
  transition:background .2s ease,color .2s ease,border-color .2s ease,transform .2s ease,box-shadow .2s ease;
}
.btn-primary{
  background:var(--orange);
  color:#fff;
  box-shadow:0 8px 20px rgba(255,106,31,.28);
}
.btn-primary:hover{background:var(--orange-hover);transform:translateY(-1px);box-shadow:0 12px 26px rgba(255,106,31,.36)}
.btn-outline{
  border-color:var(--blue);
  color:var(--blue);
  background:transparent;
}
.btn-outline:hover{background:rgba(17,70,200,.08);transform:translateY(-1px)}
.btn-outline-light{
  border-color:rgba(255,255,255,.28);
  color:#E6EDF7;
  background:transparent;
}
.btn-outline-light:hover{border-color:var(--cyan);color:#fff;background:rgba(61,225,240,.10)}

/* ============ 底部 CTA 横幅 ============ */
.cta-band{
  position:relative;
  overflow:hidden;
  background:var(--dark);
}
.cta-band-bg{
  position:absolute;
  inset:0;
  background-size:cover;
  background-position:center;
  opacity:.16;
}
.cta-band::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(90deg,rgba(11,18,32,.96) 0%,rgba(11,18,32,.78) 60%,rgba(11,18,32,.9) 100%);
}
.cta-band-inner{
  position:relative;
  z-index:2;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  min-height:220px;
  padding-top:44px;
  padding-bottom:44px;
}
.cta-band h2{color:#fff;font-size:30px;line-height:1.35;max-width:620px}
.cta-band p{margin-top:12px;font-size:15px;line-height:1.9;color:#93A3BC;max-width:560px}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;flex-shrink:0}
.cta-band .btn-primary{box-shadow:0 10px 26px rgba(255,106,31,.35),0 0 0 1px rgba(61,225,240,.18)}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--dark);
  color:#93A3BC;
  padding-top:56px;
  border-top:1px solid var(--dark-line);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1.1fr;
  gap:40px;
  padding-bottom:40px;
}
.footer-brand .brand{margin-bottom:0}
.footer-desc{
  margin-top:16px;
  font-size:14px;
  line-height:1.9;
  color:#93A3BC;
  max-width:320px;
}
.footer-col h4{
  color:#fff;
  font-size:14px;
  font-weight:600;
  margin-bottom:14px;
}
.footer-col a{
  display:block;
  font-size:14px;
  color:#93A3BC;
  padding:6px 0;
  transition:color .2s ease;
}
.footer-col a:hover{color:var(--cyan)}
.footer-col p{font-size:14px;line-height:1.9;color:#93A3BC;margin-bottom:8px}
.footer-bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  border-top:1px solid var(--dark-line);
  padding:20px 0;
  font-size:13px;
  color:#7A879D;
}

/* ============ 浮动 CTA ============ */
.float-cta{
  position:fixed;
  right:24px;
  top:56%;
  z-index:88;
  display:flex;
  align-items:center;
  gap:12px;
  padding:14px 20px;
  background:var(--blue);
  color:#fff;
  border-radius:999px;
  box-shadow:0 14px 30px rgba(17,70,200,.34);
  opacity:0;
  transform:translate(24px,-50%);
  pointer-events:none;
  transition:opacity .3s ease,transform .3s ease,background .2s ease,box-shadow .2s ease;
}
.float-cta.show{opacity:1;transform:translate(0,-50%);pointer-events:auto}
.float-cta:hover{background:var(--blue-hover);transform:translate(-4px,-50%);box-shadow:0 18px 36px rgba(17,70,200,.44)}
.float-cta-icon{
  flex:0 0 30px;
  width:30px;height:30px;
  border-radius:50%;
  background:rgba(255,255,255,.16);
  display:grid;
  place-items:center;
  color:#fff;
}
.float-cta-text{display:flex;flex-direction:column;line-height:1.3}
.float-cta-text strong{font-size:14px;font-weight:600}
.float-cta-text em{font-size:12px;font-style:normal;color:rgba(255,255,255,.78);margin-top:2px}

/* ============ 响应式 ============ */
@media (max-width:1180px){
  .main-nav a{padding:0 10px;font-size:14px}
  .main-nav a::after{left:10px;right:10px}
}
@media (max-width:1024px){
  .main-nav,.header-actions{display:none}
  .nav-toggle{display:inline-flex}
  .page-hero{padding:52px 0 48px}
  .page-hero h1{font-size:34px}
  .hero-sub{font-size:17px}
  .section{padding:72px 0}
  .section-head h2,.reason-aside h2,.faq-aside h2{font-size:27px}
  .feature-grid{grid-template-columns:1fr;gap:22px}
  .feature-card:nth-child(even){margin-top:0}
  .flow-grid{grid-template-columns:repeat(2,1fr)}
  .check-block{grid-template-columns:1fr;gap:24px;padding:28px}
  .reason-wrap{grid-template-columns:1fr;gap:24px}
  .faq-layout{grid-template-columns:1fr;gap:24px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .cta-band-inner{flex-direction:column;align-items:flex-start;gap:24px;min-height:0;padding-top:52px;padding-bottom:52px}
}
@media (max-width:768px){
  .container{padding-left:18px;padding-right:18px}
  .page-hero h1{font-size:28px}
  .hero-sub{font-size:16px;line-height:1.65}
  .hero-lead{font-size:14px}
  .section{padding:56px 0}
  .section-head{margin-bottom:32px}
  .feature-card{flex-direction:column;min-height:0}
  .feature-card.reverse{flex-direction:column}
  .feature-media{width:100%;flex:0 0 auto;height:190px;border-right:0;border-left:0;border-bottom:1px solid var(--divider)}
  .feature-card.reverse .feature-media{border-left:0;border-bottom:1px solid var(--divider)}
  .float-cta{
    right:0;left:0;top:auto;bottom:0;
    border-radius:0;
    justify-content:flex-start;
    padding:10px 18px calc(10px + env(safe-area-inset-bottom));
    transform:translateY(100%);
    min-height:56px;
    box-shadow:0 -8px 24px rgba(11,18,32,.28);
  }
  .float-cta.show{transform:translateY(0)}
  .float-cta:hover{transform:translateY(0)}
  .site-body{padding-bottom:72px}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px}
  .flow-grid{grid-template-columns:1fr}
}
@media (max-width:520px){
  .page-hero{padding:40px 0 38px}
  .page-hero h1{font-size:24px;line-height:1.32}
  .section-head h2,.reason-aside h2,.faq-aside h2{font-size:23px}
  .cta-band h2{font-size:22px}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
  .feature-body{padding:20px 18px}
  .flow-item{padding:20px 18px}
  .check-block{padding:22px 18px}
  .status-link{margin-left:0;width:100%}
  .faq-q{font-size:15px;padding:16px 16px}
  .faq-a p{padding:0 16px 18px;font-size:14px}
  .float-cta-text em{display:none}
}