/* roulang page: index */
:root{
  --primary:#1D4ED8;
  --primary-hover:#1A44BF;
  --primary-active:#163AA3;
  --primary-08:rgba(29,78,216,.08);
  --primary-06:rgba(29,78,216,.06);
  --primary-10:#E8EEFF;
  --accent:#F26522;
  --accent-10:#FEEEE7;
  --teal:#0E9F8E;
  --teal-10:#E6F6F3;
  --ink:#0B1220;
  --ink-2:#47546A;
  --ink-3:#8A94A6;
  --line:#E5E9F2;
  --bg:#F4F6FB;
  --surface:#FFFFFF;
  --r-sm:10px;
  --r-md:16px;
  --r-lg:20px;
  --r-xl:24px;
  --sh1:0 1px 2px rgba(11,18,32,.06),0 1px 3px rgba(11,18,32,.04);
  --sh2:0 12px 28px -14px rgba(11,18,32,.18);
  --sh3:0 24px 48px -20px rgba(11,18,32,.24);
  --maxw:1200px;
  --t-fast:.2s ease;
  --t-med:.24s ease-out;
  --t-slow:.6s ease-out;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--primary);text-decoration:none;transition:color var(--t-fast)}
a:hover{color:var(--primary-hover)}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
h1,h2,h3,h4,p,figure,ul,ol{margin:0;padding:0}
ul,ol{list-style:none}
table{border-collapse:collapse;width:100%}
:focus-visible{outline:3px solid rgba(29,78,216,.35);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 20px}
@media(min-width:768px){.container{padding:0 32px}}
.section{padding:56px 0}
@media(min-width:768px){.section{padding:72px 0}}
@media(min-width:1280px){.section{padding:104px 0}}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-variant-numeric:tabular-nums}

/* ---------- topbar ---------- */
.topbar{background:var(--primary-06);border-bottom:1px solid rgba(29,78,216,.08)}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:36px;font-size:13px;color:var(--ink-2)}
.topbar-note{display:flex;align-items:center;gap:8px}
.topbar-dot{width:6px;height:6px;border-radius:50%;background:var(--teal);flex:none}
.topbar-links{display:flex;align-items:center;gap:18px}
.topbar-links a{font-size:13px;color:var(--ink-2)}
.topbar-links a:hover{color:var(--primary)}
@media(max-width:640px){.topbar-links span.hide-sm{display:none}}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:120;background:#fff;transition:box-shadow var(--t-fast),border-color var(--t-fast)}
.site-header.scrolled{border-bottom:1px solid var(--line);box-shadow:var(--sh1)}
.header-inner{display:flex;align-items:center;gap:16px;height:72px}
.logo{display:inline-flex;align-items:center;gap:10px;flex:none}
.logo-mark{width:34px;height:34px;border-radius:10px;background:linear-gradient(135deg,var(--primary),#3B6DF0);color:#fff;display:grid;place-items:center;font-weight:800;font-size:17px;letter-spacing:-.02em;box-shadow:0 6px 14px -8px rgba(29,78,216,.9)}
.logo-text{font-size:18px;font-weight:700;color:var(--ink);letter-spacing:-.01em;white-space:nowrap}
.main-nav{display:none}
@media(min-width:1080px){
  .main-nav{display:flex;align-items:center;gap:2px;margin-left:14px}
}
.nav-link{position:relative;padding:10px 14px;border-radius:8px;font-size:15px;color:var(--ink-2);white-space:nowrap;transition:color var(--t-fast),background var(--t-fast)}
.nav-link:hover{color:var(--primary);background:var(--primary-06)}
.nav-link.is-active{color:var(--primary);font-weight:600}
.nav-link.is-active::after{content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;border-radius:2px;background:var(--primary)}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:10px}

/* ---------- mega ---------- */
.mega-wrap{position:relative;display:none}
@media(min-width:1080px){.mega-wrap{display:block}}
.mega-trigger{display:inline-flex;align-items:center;gap:7px;height:40px;padding:0 14px;border-radius:var(--r-sm);font-size:14px;font-weight:600;color:var(--ink-2);border:1px solid var(--line);background:#fff;transition:border-color var(--t-fast),color var(--t-fast),box-shadow var(--t-fast)}
.mega-trigger:hover{color:var(--primary);border-color:var(--primary);box-shadow:var(--sh1)}
.mega-trigger svg{transition:transform var(--t-med)}
.mega-wrap.open .mega-trigger{color:var(--primary);border-color:var(--primary)}
.mega-wrap.open .mega-trigger svg{transform:rotate(180deg)}
.mega-panel{
  position:absolute;top:calc(100% + 12px);right:0;width:760px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  box-shadow:var(--sh3);padding:24px;
  display:grid;grid-template-columns:1.05fr 1fr 1fr;gap:22px;
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity var(--t-med),transform var(--t-med),visibility var(--t-med);
}
.mega-wrap.open .mega-panel{opacity:1;visibility:visible;transform:translateY(0)}
.mega-col h4{font-size:13px;font-weight:700;letter-spacing:.06em;color:var(--ink-3);margin-bottom:12px}
.mega-col ul{display:flex;flex-direction:column;gap:2px}
.mega-col ul a{display:block;padding:7px 10px;border-radius:8px;font-size:14px;color:var(--ink-2)}
.mega-col ul a:hover{background:var(--primary-06);color:var(--primary)}
.mega-post{display:block;padding:10px 10px;border-radius:10px}
.mega-post:hover{background:var(--primary-06)}
.mega-post strong{display:block;font-size:14px;font-weight:600;color:var(--ink);line-height:1.5;overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}
.mega-post:hover strong{color:var(--primary)}
.mega-post span{display:block;margin-top:4px;font-size:12px;color:var(--ink-3)}
.mega-card{display:block;border:1px solid var(--line);border-radius:12px;overflow:hidden;background:#fff}
.mega-card img{width:100%;aspect-ratio:16/10;object-fit:cover}
.mega-card-body{padding:12px 14px 16px}
.mega-card-tag{display:inline-block;font-size:12px;font-weight:600;color:var(--accent);background:var(--accent-10);border-radius:999px;padding:2px 10px;margin-bottom:8px}
.mega-card-body strong{display:block;font-size:14px;line-height:1.5;color:var(--ink)}
.mega-card-body em{display:inline-flex;align-items:center;gap:4px;margin-top:8px;font-size:13px;font-style:normal;color:var(--primary);font-weight:600}

/* ---------- mobile drawer ---------- */
.menu-toggle{display:inline-grid;place-items:center;width:44px;height:44px;border-radius:var(--r-sm);border:1px solid var(--line);background:#fff}
.menu-toggle:hover{border-color:var(--primary)}
.menu-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--ink);position:relative}
.menu-toggle span::before,.menu-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;border-radius:2px;background:var(--ink)}
.menu-toggle span::before{top:-6px}
.menu-toggle span::after{top:6px}
@media(min-width:1080px){.menu-toggle{display:none}}
.drawer{position:fixed;inset:0;z-index:200;background:#fff;transform:translateX(100%);transition:transform var(--t-med);display:flex;flex-direction:column;overflow-y:auto}
.drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding:14px 20px;border-bottom:1px solid var(--line)}
.drawer-close{width:44px;height:44px;border-radius:var(--r-sm);border:1px solid var(--line);font-size:22px;line-height:1;display:grid;place-items:center}
.drawer-nav{display:flex;flex-direction:column;padding:8px 12px 24px}
.drawer-nav a{display:flex;align-items:center;justify-content:space-between;min-height:56px;padding:0 12px;font-size:16px;color:var(--ink);border-bottom:1px solid var(--line)}
.drawer-nav a:hover,.drawer-nav a.is-active{color:var(--primary)}
.drawer-foot{padding:20px;margin-top:auto}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:46px;padding:0 20px;border-radius:var(--r-sm);font-size:15px;font-weight:600;white-space:nowrap;transition:background var(--t-fast),color var(--t-fast),border-color var(--t-fast),box-shadow var(--t-fast),transform var(--t-fast)}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 8px 18px -12px rgba(29,78,216,.95)}
.btn-primary:hover{background:var(--primary-hover);color:#fff;box-shadow:0 12px 24px -12px rgba(29,78,216,.95)}
.btn-primary:active{background:var(--primary-active);transform:translateY(1px)}
.btn-ghost{background:#fff;color:var(--primary);border:1px solid var(--line)}
.btn-ghost:hover{border-color:var(--primary);background:var(--primary-06);color:var(--primary)}
.btn-ghost:active{transform:translateY(1px)}
.btn-sm{height:40px;padding:0 16px;font-size:14px}
.btn-block{width:100%}
.btn[disabled],.btn.is-disabled{opacity:.4;pointer-events:none}
.text-link{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--primary)}
.text-link svg{transition:transform var(--t-med)}
.text-link:hover svg{transform:translateX(4px)}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;background:linear-gradient(180deg,#FFFFFF 0%,#F7F9FF 62%,var(--bg) 100%)}
.hero::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(29,78,216,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(29,78,216,.05) 1px,transparent 1px);background-size:64px 64px;mask-image:radial-gradient(ellipse 70% 60% at 70% 10%,#000,transparent 72%);-webkit-mask-image:radial-gradient(ellipse 70% 60% at 70% 10%,#000,transparent 72%);pointer-events:none}
.hero-inner{position:relative;display:grid;gap:48px;padding:52px 0 64px}
@media(min-width:1024px){.hero-inner{grid-template-columns:1fr 1fr;align-items:center;gap:56px;padding:76px 0 96px}}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--primary);background:var(--primary-10);border-radius:999px;padding:5px 14px;margin-bottom:18px}
.eyebrow i{width:6px;height:6px;border-radius:50%;background:var(--accent)}
.hero-title{font-size:clamp(30px,5vw,52px);line-height:1.15;font-weight:700;letter-spacing:-.02em}
.hero-sub{margin-top:18px;font-size:clamp(16px,2vw,19px);line-height:1.75;color:var(--ink-2);max-width:560px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}
.hero-facts{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;margin-top:38px;padding-top:26px;border-top:1px solid var(--line)}
.hero-facts li{display:flex;flex-direction:column;gap:2px}
.hero-facts strong{font-size:24px;font-weight:700;color:var(--primary);font-family:ui-monospace,monospace;font-variant-numeric:tabular-nums;line-height:1.2}
.hero-facts span{font-size:13px;color:var(--ink-3);line-height:1.5}
.hero-media{position:relative}
.hero-media img{width:100%;aspect-ratio:3/2;object-fit:cover;border-radius:var(--r-lg);box-shadow:var(--sh2)}
.hero-datacard{position:absolute;left:18px;bottom:18px;width:196px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:14px 16px;box-shadow:var(--sh2)}
.hero-datacard .datacard-label{display:block;font-size:12px;color:var(--ink-3)}
.hero-datacard .datacard-value{display:block;font-size:26px;font-weight:700;color:var(--ink);font-family:ui-monospace,monospace;font-variant-numeric:tabular-nums;line-height:1.25;margin-top:2px}
.hero-datacard .datacard-note{display:block;font-size:12px;color:var(--teal);font-weight:600;margin-top:2px}
@media(max-width:520px){
  .hero-datacard{width:160px;left:12px;bottom:12px;padding:10px 12px}
  .hero-datacard .datacard-value{font-size:20px}
}

/* ---------- section head ---------- */
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:40px}
.section-index{display:inline-block;font-family:ui-monospace,monospace;font-size:13px;font-weight:700;letter-spacing:.14em;color:var(--accent);margin-bottom:10px}
.section-title{font-size:clamp(26px,3.4vw,34px);line-height:1.3;font-weight:700;letter-spacing:-.01em}
.section-desc{margin-top:12px;font-size:16px;color:var(--ink-2);max-width:660px}

/* ---------- value ---------- */
.value-grid{display:grid;gap:20px;grid-template-columns:1fr}
@media(min-width:768px){.value-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(min-width:1024px){.value-grid{grid-template-columns:repeat(4,minmax(0,1fr));grid-auto-rows:minmax(178px,auto)}}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--sh1);transition:transform var(--t-med),box-shadow var(--t-med),border-color var(--t-med)}
.card:hover{transform:translateY(-4px);box-shadow:var(--sh3);border-color:#D8DFEE}
.value-card{padding:24px}
.value-card--lg{padding:28px;display:flex;flex-direction:column;gap:14px;background:linear-gradient(150deg,#FFFFFF 0%,#F7F9FF 100%)}
@media(min-width:768px){
  .value-card--lg{grid-column:span 2}
}
@media(min-width:1024px){
  .value-card--lg{grid-column:span 2;grid-row:span 2}
}
.value-icon{width:44px;height:44px;border-radius:12px;background:var(--primary-10);color:var(--primary);display:grid;place-items:center;flex:none}
.value-icon.is-accent{background:var(--accent-10);color:var(--accent)}
.value-icon.is-teal{background:var(--teal-10);color:var(--teal)}
.value-card h3{font-size:19px;font-weight:600;line-height:1.45;margin-top:16px}
.value-card--lg h3{margin-top:0;font-size:23px}
.value-card p{font-size:14px;line-height:1.75;color:var(--ink-2);margin-top:10px}
.value-points{margin-top:auto;padding-top:16px;display:flex;flex-direction:column;gap:9px}
.value-points li{position:relative;padding-left:20px;font-size:14px;color:var(--ink-2)}
.value-points li::before{content:"";position:absolute;left:0;top:9px;width:8px;height:8px;border-radius:2px;background:var(--primary);opacity:.85}

/* ---------- demo ---------- */
.demo-media img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:var(--r-md);box-shadow:var(--sh1)}
.demo-steps{position:relative;display:grid;gap:22px;grid-template-columns:1fr;margin-top:36px}
@media(min-width:768px){.demo-steps{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(min-width:1024px){.demo-steps{grid-template-columns:repeat(4,minmax(0,1fr));gap:0}}
.demo-steps::before{content:"";display:none}
@media(min-width:1024px){
  .demo-steps::before{display:block;position:absolute;left:6%;right:6%;top:22px;height:1px;border-top:1px dashed #C9D3E8}
}
.step{position:relative;background:transparent;padding:0}
@media(min-width:1024px){.step{padding:0 20px}}
.step-num{width:44px;height:44px;border-radius:50%;background:#fff;border:1px solid var(--line);color:var(--primary);display:grid;place-items:center;font-family:ui-monospace,monospace;font-weight:700;font-size:15px;box-shadow:var(--sh1);position:relative;z-index:1}
.step h3{font-size:18px;font-weight:600;margin-top:16px}
.step p{font-size:14px;line-height:1.75;color:var(--ink-2);margin-top:8px;max-width:280px}

/* ---------- proof ---------- */
.stats-bar{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px 0;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);padding:26px 8px;box-shadow:var(--sh1)}
@media(min-width:900px){.stats-bar{grid-template-columns:repeat(4,minmax(0,1fr));padding:32px 0}}
.stat{text-align:center;padding:0 16px}
@media(min-width:900px){
  .stat + .stat{border-left:1px solid var(--line)}
}
.stat strong{display:block;font-size:clamp(26px,3vw,38px);line-height:1.1;font-weight:700;color:var(--primary);font-family:ui-monospace,monospace;font-variant-numeric:tabular-nums}
.stat span{display:block;margin-top:8px;font-size:13px;color:var(--ink-3)}
.proof-grid{display:grid;gap:20px;margin-top:24px}
@media(min-width:1024px){.proof-grid{grid-template-columns:1.15fr 1fr;gap:24px}}
.quote-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);padding:32px 30px;box-shadow:var(--sh1);display:flex;flex-direction:column;justify-content:center}
.quote-mark{font-size:38px;line-height:1;color:var(--accent);font-family:Georgia,serif;margin-bottom:6px}
.quote-card blockquote{border-left:3px solid var(--accent);padding-left:18px;font-size:17px;line-height:1.85;color:var(--ink)}
.quote-author{margin-top:20px;font-size:14px;color:var(--ink-3)}
.quote-author strong{display:block;color:var(--ink);font-size:15px;font-weight:600;margin-bottom:2px}
.case-list{display:grid;gap:20px}
.case-card{display:grid;grid-template-columns:112px 1fr;gap:16px;align-items:center;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);padding:14px;box-shadow:var(--sh1);transition:transform var(--t-med),box-shadow var(--t-med)}
.case-card:hover{transform:translateY(-4px);box-shadow:var(--sh3)}
.case-card img{width:112px;height:88px;object-fit:cover;border-radius:12px}
.case-card h3{font-size:16px;font-weight:600;line-height:1.5}
.case-card p{font-size:13px;color:var(--ink-2);line-height:1.7;margin-top:6px}

/* ---------- pricing ---------- */
.price-grid{display:grid;gap:20px;grid-template-columns:1fr;align-items:stretch}
@media(min-width:900px){.price-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;padding-top:14px}}
.price-card{position:relative;display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);padding:28px 24px;box-shadow:var(--sh1);transition:transform var(--t-med),box-shadow var(--t-med)}
.price-card:hover{transform:translateY(-4px);box-shadow:var(--sh3)}
.price-card--featured{border-top:3px solid var(--primary);box-shadow:var(--sh2)}
@media(min-width:900px){.price-card--featured{transform:translateY(-12px)}.price-card--featured:hover{transform:translateY(-16px)}}
.price-flag{position:absolute;top:-13px;right:22px;background:var(--accent);color:#fff;font-size:12px;font-weight:700;border-radius:999px;padding:4px 12px;box-shadow:0 8px 16px -10px rgba(242,101,34,.95)}
.price-name{font-size:18px;font-weight:700}
.price-sub{font-size:13px;color:var(--ink-3);margin-top:6px;min-height:22px}
.price-amount{display:flex;align-items:baseline;gap:8px;margin:20px 0 6px}
.price-amount strong{font-size:34px;font-weight:700;letter-spacing:-.02em;font-family:ui-monospace,monospace;font-variant-numeric:tabular-nums;color:var(--ink)}
.price-amount span{font-size:13px;color:var(--ink-3)}
.price-features{display:flex;flex-direction:column;gap:11px;padding:20px 0;margin-top:8px;border-top:1px solid var(--line);flex:1}
.price-features li{display:flex;align-items:flex-start;gap:10px;font-size:14px;color:var(--ink-2);line-height:1.6}
.price-features li svg{flex:none;margin-top:4px;color:var(--teal)}

/* ---------- news ---------- */
.news-grid{display:grid;gap:22px;grid-template-columns:1fr}
@media(min-width:768px){.news-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(min-width:1024px){.news-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
.news-card{display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;box-shadow:var(--sh1);transition:transform var(--t-med),box-shadow var(--t-med);color:inherit}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--sh3);color:inherit}
.news-cover{position:relative;aspect-ratio:16/10;background-color:#E9EEF8;background-size:cover;background-position:center;overflow:hidden}
.news-card:hover .news-cover{transform:scale(1.03)}
.news-cover{transition:transform var(--t-slow)}
.news-grid > .news-card:nth-child(6n+1) .news-cover{background-image:url('/assets/images/coverpic/cover-4.png')}
.news-grid > .news-card:nth-child(6n+2) .news-cover{background-image:url('/assets/images/coverpic/cover-5.webp')}
.news-grid > .news-card:nth-child(6n+3) .news-cover{background-image:url('/assets/images/coverpic/cover-6.webp')}
.news-grid > .news-card:nth-child(6n+4) .news-cover{background-image:url('/assets/images/coverpic/cover-7.webp')}
.news-grid > .news-card:nth-child(6n+5) .news-cover{background-image:url('/assets/images/coverpic/cover-8.png')}
.news-grid > .news-card:nth-child(6n+6) .news-cover{background-image:url('/assets/images/coverpic/cover-9.webp')}
.news-badge{position:absolute;left:14px;top:14px;background:#fff;color:var(--primary);font-size:12px;font-weight:600;border-radius:999px;padding:3px 11px;box-shadow:var(--sh1)}
.news-body{display:flex;flex-direction:column;flex:1;padding:18px 20px 20px}
.news-body h3{font-size:17px;font-weight:600;line-height:1.55;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-body p{margin-top:9px;font-size:14px;line-height:1.75;color:var(--ink-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-foot{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:auto;padding-top:14px;border-top:1px solid var(--line);font-size:13px;color:var(--ink-3);font-variant-numeric:tabular-nums}
.news-foot em{font-style:normal;color:var(--primary);font-weight:600}
.empty-state{display:flex;flex-direction:column;align-items:center;gap:14px;text-align:center;background:var(--surface);border:1px dashed var(--line);border-radius:var(--r-md);padding:56px 24px}
.empty-state svg{color:var(--ink-3)}
.empty-state p{font-size:15px;color:var(--ink-2)}

/* ---------- faq ---------- */
.faq-list{max-width:880px}
.faq-item{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);margin-bottom:12px;box-shadow:var(--sh1);transition:box-shadow var(--t-med)}
.faq-item[open]{box-shadow:var(--sh2);box-shadow:inset 3px 0 0 var(--primary),var(--sh2)}
.faq-item summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:60px;padding:16px 22px;font-size:17px;font-weight:600;line-height:1.6}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"";flex:none;width:11px;height:11px;margin-right:4px;border-right:2px solid var(--ink-3);border-bottom:2px solid var(--ink-3);transform:rotate(45deg) translate(-2px,-2px);transition:transform var(--t-med)}
.faq-item[open] summary::after{transform:rotate(-135deg) translate(-2px,-2px);border-color:var(--primary)}
.faq-item summary:hover{color:var(--primary)}
.faq-answer{padding:0 22px 20px;font-size:15px;line-height:1.85;color:var(--ink-2);max-width:760px}

/* ---------- cta ---------- */
.cta-band{background:var(--primary-10);border-radius:var(--r-lg);padding:40px 32px;display:flex;flex-direction:column;gap:24px;align-items:flex-start}
@media(min-width:900px){.cta-band{flex-direction:row;align-items:center;justify-content:space-between;padding:48px 48px}}
.cta-band h2{font-size:clamp(22px,2.6vw,30px);font-weight:700;line-height:1.35}
.cta-band p{margin-top:10px;font-size:15px;color:var(--ink-2);max-width:560px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;flex:none}
@media(max-width:520px){.cta-actions{width:100%}.cta-actions .btn{width:100%}}

/* ---------- footer ---------- */
.site-footer{background:#fff;border-top:1px solid var(--line);padding-top:56px;margin-top:56px}
.footer-grid{display:grid;gap:32px;grid-template-columns:1fr;padding-bottom:40px}
@media(min-width:640px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(min-width:1024px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px}}
.footer-brand p{margin-top:14px;font-size:14px;line-height:1.8;color:var(--ink-2);max-width:320px}
.footer-col h3{font-size:15px;font-weight:600;margin-bottom:14px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col ul a{font-size:14px;color:var(--ink-2)}
.footer-col ul a:hover{color:var(--primary)}
.footer-col .contact-line{font-size:14px;color:var(--ink-2);line-height:1.7}
.footer-bottom{border-top:1px solid var(--line);padding:20px 0;display:flex;flex-wrap:wrap;gap:10px;align-items:center;justify-content:space-between;font-size:13px;color:var(--ink-3);font-variant-numeric:tabular-nums}

/* ---------- float cta ---------- */
.float-cta{position:fixed;right:24px;bottom:24px;z-index:140;width:220px;background:#fff;border:1px solid var(--line);border-radius:var(--r-md);padding:16px;box-shadow:var(--sh3);opacity:0;visibility:hidden;transform:translateY(12px);transition:opacity var(--t-med),transform var(--t-med),visibility var(--t-med)}
.float-cta.show{opacity:1;visibility:visible;transform:translateY(0)}
.float-cta p{font-size:13px;color:var(--ink-2);line-height:1.6;margin-bottom:12px}
.back-top{position:fixed;right:24px;bottom:174px;z-index:139;width:44px;height:44px;border-radius:50%;background:#fff;border:1px solid var(--line);box-shadow:var(--sh2);display:grid;place-items:center;color:var(--ink-2);opacity:0;visibility:hidden;transform:translateY(12px);transition:opacity var(--t-med),transform var(--t-med),visibility var(--t-med),color var(--t-fast)}
.back-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.back-top:hover{color:var(--primary)}
@media(max-width:767px){
  body{padding-bottom:72px}
  .float-cta{right:0;left:0;bottom:0;width:auto;border-radius:16px 16px 0 0;border-left:0;border-right:0;border-bottom:0;padding:10px 14px calc(10px + env(safe-area-inset-bottom))}
  .float-cta p{display:none}
  .back-top{display:none}
}
@media(prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important;scroll-behavior:auto!important}
}

/* roulang page: category1 */
:root{
  --brand:#1D4ED8;
  --brand-hover:#1A44BF;
  --brand-active:#163AA3;
  --brand-soft:#E8EEFF;
  --accent:#F26522;
  --accent-soft:#FEEBE1;
  --teal:#0E9F8E;
  --teal-soft:#E2F5F1;
  --ink:#0B1220;
  --ink-2:#47546A;
  --ink-3:#8A94A6;
  --line:#E5E9F2;
  --bg:#F4F6FB;
  --surface:#FFFFFF;
  --r-btn:10px;
  --r-card:16px;
  --r-hero:22px;
  --sh-1:0 1px 2px rgba(11,18,32,.06),0 1px 3px rgba(11,18,32,.04);
  --sh-2:0 12px 28px -14px rgba(11,18,32,.18);
  --sh-3:0 24px 48px -20px rgba(11,18,32,.24);
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--ink);
  background:var(--bg);
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0}
a{color:var(--brand);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--brand-hover)}
h1,h2,h3,h4{margin:0;line-height:1.3;font-weight:700;color:var(--ink)}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit}
:focus-visible{outline:3px solid rgba(29,78,216,.35);outline-offset:2px;border-radius:8px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 32px}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-variant-numeric:tabular-nums}

/* ============ 顶部细条 ============ */
.topbar{background:rgba(29,78,216,.06);border-bottom:1px solid var(--line)}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;height:36px;font-size:13px;color:var(--ink-2)}
.topbar-links{display:flex;align-items:center;gap:18px}
.topbar-links a{color:var(--brand);font-weight:600}

/* ============ 导航 ============ */
.site-header{position:sticky;top:0;z-index:80;background:var(--surface);transition:box-shadow .24s ease,border-color .24s ease;border-bottom:1px solid transparent}
.site-header.is-scrolled{border-bottom:1px solid var(--line);box-shadow:var(--sh-1)}
.header-inner{display:flex;align-items:center;gap:28px;height:74px}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo-mark{
  width:36px;height:36px;border-radius:11px;
  background:linear-gradient(140deg,var(--brand) 0%,#3B6BE8 100%);
  color:#fff;font-weight:700;font-size:19px;line-height:36px;text-align:center;
  box-shadow:var(--sh-1);
}
.logo-text{font-size:19px;font-weight:700;color:var(--ink);letter-spacing:.5px}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:8px}
.nav-link{position:relative;display:inline-block;padding:10px 14px;border-radius:10px;font-size:15px;font-weight:500;color:var(--ink-2)}
.nav-link:hover{color:var(--brand);background:var(--brand-soft)}
.nav-link.is-active{color:var(--brand);font-weight:600}
.nav-link.is-active::after{content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;border-radius:2px;background:var(--brand)}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:12px}

/* Mega */
.mega{position:relative}
.mega-trigger{display:inline-flex;align-items:center;gap:6px;height:40px;padding:0 14px;border-radius:var(--r-btn);font-size:14px;font-weight:600;color:var(--ink-2);border:1px solid var(--line);background:#fff;transition:all .2s ease}
.mega-trigger:hover{color:var(--brand);border-color:var(--brand);background:var(--brand-soft)}
.mega-trigger .caret{width:8px;height:8px;border-right:2px solid currentColor;border-bottom:2px solid currentColor;transform:rotate(45deg) translateY(-1px);transition:transform .2s ease}
.mega.is-open .mega-trigger{color:var(--brand);border-color:var(--brand);background:var(--brand-soft)}
.mega.is-open .caret{transform:rotate(-135deg) translateY(-2px)}
.mega-panel{
  position:absolute;top:calc(100% + 12px);right:0;width:720px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-3);padding:24px;display:grid;grid-template-columns:1fr 1fr 220px;gap:24px;
  opacity:0;visibility:hidden;transform:translateY(-6px);transition:all .2s ease;
}
.mega.is-open .mega-panel{opacity:1;visibility:visible;transform:translateY(0)}
.mega-title{font-size:13px;font-weight:600;color:var(--ink-3);letter-spacing:1px;margin-bottom:12px}
.mega-list li+li{margin-top:8px}
.mega-list a{font-size:15px;color:var(--ink-2);font-weight:500}
.mega-list a:hover{color:var(--brand)}
.mega-news li+li{margin-top:12px;padding-top:12px;border-top:1px solid var(--line)}
.mega-news a{display:block;font-size:14px;color:var(--ink);font-weight:500;line-height:1.5}
.mega-news a:hover{color:var(--brand)}
.mega-news span{display:block;font-size:12px;color:var(--ink-3);margin-top:4px}
.mega-card{display:block;border:1px solid var(--line);border-radius:14px;overflow:hidden;background:#fff;transition:box-shadow .24s ease,transform .24s ease}
.mega-card:hover{box-shadow:var(--sh-2);transform:translateY(-3px)}
.mega-card img{width:100%;height:110px;object-fit:cover}
.mega-card-body{padding:12px 14px 14px}
.mega-card-body strong{display:block;font-size:14px;margin-bottom:4px}
.mega-card-body em{font-style:normal;font-size:12px;color:var(--brand);font-weight:600}

/* 移动端菜单按钮与抽屉 */
.menu-toggle{display:none;width:44px;height:44px;border-radius:var(--r-btn);border:1px solid var(--line);align-items:center;justify-content:center;background:#fff}
.menu-toggle span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;position:relative}
.menu-toggle span::before,.menu-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink);border-radius:2px}
.menu-toggle span::before{top:-6px}
.menu-toggle span::after{top:6px}
.mobile-drawer{display:none;background:#fff;border-top:1px solid var(--line);padding:8px 0 20px}
.mobile-drawer.is-open{display:block}
.mobile-drawer a{display:flex;align-items:center;height:56px;padding:0 32px;font-size:16px;color:var(--ink);border-bottom:1px solid var(--line)}
.mobile-drawer a.is-active{color:var(--brand);font-weight:600}
.mobile-drawer .drawer-cta{margin:16px 32px 0;height:48px;border-radius:var(--r-btn);background:var(--brand);color:#fff;justify-content:center;border:0;font-weight:600}

/* ============ 按钮 ============ */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:46px;padding:0 20px;border-radius:var(--r-btn);font-size:15px;font-weight:600;transition:all .2s ease;white-space:nowrap}
.btn-primary{background:var(--brand);color:#fff;box-shadow:var(--sh-1)}
.btn-primary:hover{background:var(--brand-hover);color:#fff;box-shadow:var(--sh-2)}
.btn-primary:active{background:var(--brand-active);transform:translateY(1px)}
.btn-ghost{background:#fff;color:var(--brand);border:1px solid var(--line)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand-hover);box-shadow:var(--sh-1)}
.btn-ghost:active{transform:translateY(1px)}
.btn-sm{height:40px;padding:0 16px;font-size:14px}
.btn-text{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand)}
.btn-text .arrow{transition:transform .2s ease}
.btn-text:hover .arrow{transform:translateX(4px)}

/* ============ 面包屑 ============ */
.crumb{padding:20px 0 0;font-size:13px;color:var(--ink-3)}
.crumb a{color:var(--ink-3)}
.crumb a:hover{color:var(--brand)}
.crumb .sep{margin:0 8px;color:#C4CBD9}
.crumb .current{color:var(--ink-2);font-weight:600}

/* ============ Hero ============ */
.hero{padding:36px 0 64px}
.hero-grid{display:grid;grid-template-columns:6fr 6fr;gap:48px;align-items:center}
.eyebrow{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;background:var(--brand-soft);color:var(--brand);font-size:13px;font-weight:600;margin-bottom:18px}
.eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--accent)}
.hero h1{font-size:clamp(34px,4.2vw,52px);line-height:1.15;letter-spacing:-.5px;margin-bottom:18px}
.hero .lead{font-size:17px;color:var(--ink-2);max-width:560px;margin-bottom:26px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:28px}
.hero-facts{display:flex;flex-wrap:wrap;gap:26px;padding-top:22px;border-top:1px solid var(--line)}
.hero-facts div strong{display:block;font-size:22px;color:var(--brand);font-weight:700}
.hero-facts div span{font-size:13px;color:var(--ink-3)}
.hero-media{position:relative}
.hero-media img{width:100%;height:380px;object-fit:cover;border-radius:var(--r-hero);box-shadow:var(--sh-2)}
.float-card{position:absolute;left:-18px;bottom:20px;width:210px;background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--sh-2);padding:14px 16px}
.float-card strong{display:block;font-size:13px;color:var(--ink-3);font-weight:500;margin-bottom:6px}
.float-card .value{font-size:20px;font-weight:700;color:var(--brand)}
.float-card .tip{font-size:12px;color:var(--ink-3);margin-top:4px}

/* ============ 通用板块 ============ */
.section{padding:84px 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:44px;flex-wrap:wrap}
.section-index{display:block;font-size:13px;font-weight:700;color:var(--accent);letter-spacing:2px;margin-bottom:10px}
.section-head h2{font-size:clamp(26px,3vw,34px);margin-bottom:10px}
.section-head p{color:var(--ink-2);max-width:600px}

/* ============ 交替图文 ============ */
.split{display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:center}
.split+.split{margin-top:72px;padding-top:72px;border-top:1px solid var(--line)}
.split-media{position:relative;border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1);border:1px solid var(--line);background:#fff}
.split-media img{width:100%;height:320px;object-fit:cover;transition:transform .6s ease-out}
.split-media:hover img{transform:scale(1.03)}
.split--reverse .split-media{order:2}
.split-tag{display:inline-block;padding:4px 12px;border-radius:999px;background:var(--brand-soft);color:var(--brand);font-size:12px;font-weight:600;margin-bottom:14px}
.split-tag.warm{background:var(--accent-soft);color:#B8430D}
.split-tag.cool{background:var(--teal-soft);color:#0A7A6C}
.split h3{font-size:23px;margin-bottom:14px}
.split .desc{color:var(--ink-2);margin-bottom:18px}
.point-list li{position:relative;padding-left:22px;margin-bottom:10px;color:var(--ink-2);font-size:15px}
.point-list li::before{content:"";position:absolute;left:0;top:11px;width:8px;height:8px;border-radius:3px;background:var(--brand)}
.split-foot{margin-top:20px}

/* ============ 数据条 ============ */
.stats{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:44px 0}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.stat{padding:0 24px;position:relative}
.stat+.stat{border-left:1px solid var(--line)}
.stat .num{font-size:34px;font-weight:700;color:var(--brand);line-height:1.1}
.stat .num em{font-style:normal;font-size:16px;margin-left:2px;color:var(--ink-2)}
.stat .label{font-size:13px;color:var(--ink-3);margin-top:6px}

/* ============ 流程步骤 ============ */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;position:relative}
.step{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:26px 22px;box-shadow:var(--sh-1);transition:transform .24s ease,box-shadow .24s ease}
.step:hover{transform:translateY(-4px);box-shadow:var(--sh-3)}
.step::after{content:"";position:absolute;top:44px;right:-24px;width:24px;border-top:1px dashed #C4CBD9}
.step:last-child::after{display:none}
.step .no{width:38px;height:38px;border-radius:11px;background:var(--brand-soft);color:var(--brand);font-weight:700;font-size:15px;display:flex;align-items:center;justify-content:center;margin-bottom:14px}
.step h3{font-size:18px;margin-bottom:8px}
.step p{font-size:14px;color:var(--ink-2)}

/* ============ 适用场景 ============ */
.scene-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.scene{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:26px;box-shadow:var(--sh-1);transition:transform .24s ease,box-shadow .24s ease}
.scene:hover{transform:translateY(-4px);box-shadow:var(--sh-3)}
.scene .tag{display:inline-block;padding:4px 12px;border-radius:999px;background:var(--brand-soft);color:var(--brand);font-size:12px;font-weight:600;margin-bottom:14px}
.scene h3{font-size:19px;margin-bottom:10px}
.scene p{font-size:14px;color:var(--ink-2)}

/* ============ FAQ ============ */
.faq-list{max-width:820px}
.faq-list details{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);margin-bottom:12px;overflow:hidden;transition:box-shadow .24s ease}
.faq-list details[open]{box-shadow:var(--sh-2);border-left:3px solid var(--brand)}
.faq-list summary{list-style:none;display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:58px;padding:16px 22px;font-size:17px;font-weight:600;color:var(--ink);cursor:pointer}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list summary::after{content:"+";font-size:22px;font-weight:400;color:var(--brand);line-height:1;transition:transform .2s ease}
.faq-list details[open] summary::after{content:"−";transform:rotate(0)}
.faq-list .answer{padding:0 22px 20px;font-size:15px;line-height:1.8;color:var(--ink-2);max-width:760px}

/* ============ 相关分类 ============ */
.rel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.rel-card{display:block;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1);transition:transform .24s ease,box-shadow .24s ease;color:var(--ink)}
.rel-card:hover{transform:translateY(-4px);box-shadow:var(--sh-3);color:var(--ink)}
.rel-card img{width:100%;height:170px;object-fit:cover;transition:transform .6s ease-out}
.rel-card:hover img{transform:scale(1.03)}
.rel-body{padding:20px}
.rel-body h3{font-size:18px;margin-bottom:8px}
.rel-body p{font-size:14px;color:var(--ink-2)}
.rel-more{display:inline-flex;align-items:center;gap:6px;margin-top:14px;font-size:14px;font-weight:600;color:var(--brand)}

/* ============ CTA 条 ============ */
.cta-band{background:var(--brand-soft);border-radius:var(--r-hero);padding:44px 40px;display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap}
.cta-band h2{font-size:clamp(22px,2.4vw,28px);margin-bottom:8px}
.cta-band p{color:var(--ink-2);max-width:600px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}

/* ============ 页脚 ============ */
.site-footer{background:#fff;border-top:1px solid var(--line);padding:64px 0 0;margin-top:84px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px}
.footer-brand p{font-size:14px;color:var(--ink-2);margin-top:16px;max-width:320px}
.footer-col h3{font-size:15px;font-weight:600;margin-bottom:16px}
.footer-col li{margin-bottom:10px}
.footer-col a{font-size:14px;color:var(--ink-2)}
.footer-col a:hover{color:var(--brand)}
.contact-line{font-size:14px;color:var(--ink-2)}
.footer-bottom{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-top:48px;padding:20px 0;border-top:1px solid var(--line);font-size:13px;color:var(--ink-3)}

/* ============ 浮动元素 ============ */
.float-cta{position:fixed;right:24px;bottom:24px;width:220px;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh-3);padding:18px;z-index:70;opacity:0;visibility:hidden;transform:translateY(12px);transition:all .3s ease}
.float-cta.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.float-cta p{font-size:13px;color:var(--ink-2);margin-bottom:12px}
.float-cta .btn{width:100%}
.to-top{position:fixed;right:24px;bottom:200px;width:44px;height:44px;border-radius:var(--r-btn);background:#fff;border:1px solid var(--line);box-shadow:var(--sh-2);color:var(--brand);font-size:18px;display:flex;align-items:center;justify-content:center;z-index:70;opacity:0;visibility:hidden;transition:all .3s ease}
.to-top.is-visible{opacity:1;visibility:visible}
.to-top:hover{border-color:var(--brand);background:var(--brand-soft)}

/* ============ 响应式 ============ */
@media (max-width:1100px){
  .main-nav{display:none}
  .menu-toggle{display:flex}
  .mega{display:none}
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero-media img{height:320px}
  .float-card{left:16px}
  .mega-panel{display:none}
}
@media (max-width:1024px){
  .split{grid-template-columns:1fr;gap:28px}
  .split--reverse .split-media{order:0}
  .steps{grid-template-columns:repeat(2,1fr)}
  .step::after{display:none}
  .scene-grid,.rel-grid{grid-template-columns:repeat(2,1fr)}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:24px 0}
  .stat:nth-child(3){border-left:0}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .section{padding:64px 0}
}
@media (max-width:768px){
  .container{padding:0 20px}
  .topbar-links span{display:none}
  .header-inner{height:66px;gap:14px}
  .logo-text{font-size:17px}
  .hero{padding:24px 0 48px}
  .hero-media img{height:250px}
  .float-card{width:190px;padding:12px 14px}
  .section{padding:52px 0}
  .section-head{margin-bottom:30px}
  .split+.split{margin-top:48px;padding-top:48px}
  .split-media img{height:230px}
  .stats{padding:32px 0}
  .stat{padding:0 16px}
  .stat .num{font-size:26px}
  .scene-grid,.rel-grid,.steps{grid-template-columns:1fr}
  .cta-band{padding:30px 22px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .site-footer{padding-top:48px;margin-top:60px}
  .float-cta{left:0;right:0;bottom:0;width:100%;border-radius:16px 16px 0 0;padding:10px 16px;display:flex;align-items:center;gap:14px;transform:translateY(100%)}
  .float-cta.is-visible{transform:translateY(0)}
  .float-cta p{margin:0;flex:1;font-size:12px}
  .float-cta .btn{width:auto;padding:0 18px;height:42px}
  .to-top{bottom:88px;right:16px}
  body{padding-bottom:76px}
}
@media (max-width:520px){
  .topbar{display:none}
  .hero h1{font-size:30px}
  .hero .lead{font-size:15px}
  .hero-actions .btn{width:100%}
  .hero-facts{gap:18px}
  .hero-facts div strong{font-size:19px}
  .section-head h2{font-size:23px}
  .split h3{font-size:20px}
  .faq-list summary{font-size:16px;padding:14px 16px}
  .faq-list .answer{padding:0 16px 18px}
}

/* roulang page: article */
:root{
  --primary:#1D4ED8;
  --primary-hover:#1A44BF;
  --primary-active:#163AA3;
  --primary-soft:#E8EEFF;
  --accent:#F26522;
  --accent-soft:#FDEEE7;
  --teal:#0E9F8E;
  --teal-soft:#E2F5F2;
  --text:#0B1220;
  --text-body:#2C374B;
  --text-2:#47546A;
  --text-3:#8A94A6;
  --border:#E5E9F2;
  --bg:#F4F6FB;
  --surface:#FFFFFF;
  --r-btn:10px;
  --r-card:16px;
  --r-banner:20px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(11,18,32,.06),0 1px 3px rgba(11,18,32,.04);
  --sh-2:0 12px 28px -14px rgba(11,18,32,.18);
  --sh-3:0 24px 48px -20px rgba(11,18,32,.24);
  --container:1200px;
  --focus-ring:0 0 0 3px rgba(29,78,216,.35);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--primary);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--primary-hover)}
h1,h2,h3,h4,p,figure{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
button{font:inherit;color:inherit}
table{border-collapse:collapse}
:focus-visible{outline:none;box-shadow:var(--focus-ring);border-radius:6px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 32px}
@media(max-width:767px){.container{padding:0 20px}}

/* ---------- 顶部提示条 ---------- */
.topbar{background:rgba(29,78,216,.06);font-size:13px;color:var(--text-2)}
.topbar .container{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:36px}
.topbar strong{color:var(--primary);font-weight:600}
.topbar-links{display:flex;align-items:center;gap:18px}
.topbar-links a{color:var(--text-2);font-size:13px}
.topbar-links a:hover{color:var(--primary)}
@media(max-width:600px){.topbar-links a:first-child{display:none}}

/* ---------- 站点头部 ---------- */
.site-header{position:sticky;top:0;z-index:80;background:#fff;border-bottom:1px solid transparent;transition:border-color .24s ease,box-shadow .24s ease}
.site-header.is-scrolled{border-bottom-color:var(--border);box-shadow:var(--sh-1)}
.header-inner{display:flex;align-items:center;gap:24px;min-height:72px}
.logo{display:inline-flex;align-items:center;gap:10px;font-weight:700;color:var(--text)}
.logo:hover{color:var(--text)}
.logo-mark{width:34px;height:34px;border-radius:10px;background:var(--primary);color:#fff;display:grid;place-items:center;font-size:17px;font-weight:800;box-shadow:0 8px 16px -10px rgba(29,78,216,.9)}
.logo-text{font-size:17px;letter-spacing:.01em}
.main-nav{display:flex;align-items:center;gap:2px;margin-left:auto}
.nav-link{position:relative;display:inline-flex;align-items:center;padding:10px 14px;border-radius:8px;font-size:15px;color:var(--text-2);transition:background .2s ease,color .2s ease}
.nav-link:hover{color:var(--primary);background:var(--primary-soft)}
.nav-link.is-active{color:var(--primary);font-weight:600}
.nav-link.is-active::after{content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;border-radius:2px;background:var(--primary)}
.header-actions{display:flex;align-items:center;gap:12px;margin-left:8px}
.nav-toggle{display:none;width:44px;height:44px;border:1px solid var(--border);background:#fff;border-radius:12px;flex-direction:column;align-items:center;justify-content:center;gap:4px;cursor:pointer;transition:border-color .2s ease}
.nav-toggle:hover{border-color:var(--primary)}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--text-2);transition:background .2s ease}
.nav-toggle:hover span{background:var(--primary)}
@media(max-width:1023px){
  .nav-toggle{display:flex}
  .main-nav{
    position:fixed;top:0;left:0;right:0;bottom:0;z-index:70;
    background:#fff;flex-direction:column;align-items:stretch;gap:2px;
    margin:0;padding:96px 20px 40px;overflow-y:auto;
    transform:translateX(100%);transition:transform .3s ease;box-shadow:var(--sh-3);
  }
  .main-nav.is-open{transform:translateX(0)}
  .nav-link{min-height:56px;padding:0 16px;font-size:17px;color:var(--text);border-radius:12px}
  .nav-link.is-active::after{display:none}
  .nav-link.is-active{background:var(--primary-soft);color:var(--primary)}
}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:46px;padding:0 22px;border-radius:var(--r-btn);font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;white-space:nowrap;transition:background .24s ease,color .24s ease,border-color .24s ease,box-shadow .24s ease,transform .16s ease}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 10px 20px -12px rgba(29,78,216,.85)}
.btn-primary:hover{background:var(--primary-hover);color:#fff;box-shadow:0 14px 26px -12px rgba(29,78,216,.9)}
.btn-primary:active{background:var(--primary-active);transform:translateY(1px)}
.btn-secondary{background:#fff;color:var(--primary);border-color:var(--border)}
.btn-secondary:hover{border-color:var(--primary);color:var(--primary-hover)}
.btn-secondary:active{transform:translateY(1px)}
.btn-sm{height:40px;padding:0 16px;font-size:14px}
.btn-block{width:100%}
.btn:disabled{opacity:.4;cursor:not-allowed}

/* ---------- 标签 / 徽章 ---------- */
.pill{display:inline-flex;align-items:center;gap:6px;height:28px;padding:0 12px;border-radius:var(--r-pill);font-size:13px;font-weight:600;background:var(--primary-soft);color:var(--primary)}
.pill-accent{background:var(--accent-soft);color:#C24A12}
.pill-teal{background:var(--teal-soft);color:#0A7A6C}

/* ---------- 文章头部 ---------- */
.article-head{padding:28px 0 0}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-3)}
.breadcrumb a{color:var(--text-2)}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb .sep{color:#C7CEDB}
.breadcrumb .current{color:var(--text-3);max-width:52ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.article-hero{padding:20px 0 0}
.hero-banner{border-radius:var(--r-banner);overflow:hidden;box-shadow:var(--sh-2);background:#E9EDF6}
.hero-banner img{width:100%;height:clamp(200px,30vw,340px);object-fit:cover}
.hero-text{max-width:820px;margin:32px auto 0;text-align:left}
.hero-text h1{font-size:clamp(28px,3.6vw,42px);line-height:1.28;font-weight:700;letter-spacing:-.01em;margin-top:14px}
.post-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;margin-top:20px;font-size:13px;color:var(--text-3);font-variant-numeric:tabular-nums}
.post-meta .dot{width:4px;height:4px;border-radius:50%;background:#C7CEDB}

/* ---------- 正文区 ---------- */
.article-main{padding:48px 0 0}
.article-grid{display:grid;grid-template-columns:minmax(0,1fr);gap:40px;align-items:start}
@media(min-width:1280px){.article-grid{grid-template-columns:minmax(0,1fr) 232px;gap:56px}}
.article-content{
  background:#fff;border:1px solid var(--border);border-radius:var(--r-banner);
  padding:48px 52px;box-shadow:var(--sh-1);max-width:860px;
}
.article-content.is-empty{background:transparent;border:none;box-shadow:none;padding:0;max-width:100%}
@media(max-width:767px){.article-content{padding:28px 22px;border-radius:var(--r-card)}}
.article-content > *:first-child{margin-top:0}
.article-content p{margin:0 0 1.2em;font-size:17px;line-height:1.95;color:var(--text-body)}
.article-content h2{font-size:clamp(22px,2.4vw,28px);line-height:1.38;font-weight:700;color:var(--text);margin:2.2em 0 .8em;padding-left:16px;border-left:4px solid var(--primary)}
.article-content h3{font-size:21px;line-height:1.45;font-weight:600;color:var(--text);margin:1.8em 0 .6em}
.article-content h4{font-size:18px;line-height:1.5;font-weight:600;color:var(--text);margin:1.6em 0 .5em}
.article-content ul{margin:0 0 1.3em;padding-left:4px}
.article-content ul li{position:relative;padding-left:20px;margin-bottom:10px;font-size:17px;line-height:1.9;color:var(--text-body)}
.article-content ul li::before{content:"";position:absolute;left:0;top:.72em;width:7px;height:7px;border-radius:2px;background:var(--primary)}
.article-content ol{margin:0 0 1.3em;padding-left:1.4em;list-style:decimal}
.article-content ol li{margin-bottom:10px;font-size:17px;line-height:1.9;color:var(--text-body)}
.article-content ol li::marker{color:var(--primary);font-weight:600}
.article-content blockquote{margin:1.7em 0;padding:18px 22px;background:var(--primary-soft);border-left:4px solid var(--accent);border-radius:0 var(--r-card) var(--r-card) 0;color:var(--text-2)}
.article-content blockquote p{margin:0;font-size:16px;color:var(--text-2)}
.article-content img{border-radius:12px;margin:1.7em auto;box-shadow:var(--sh-1)}
.article-content figure{margin:1.7em 0}
.article-content figcaption{text-align:center;font-size:13px;color:var(--text-3);margin-top:10px}
.article-content a{color:var(--primary);border-bottom:1px solid rgba(29,78,216,.35)}
.article-content a:hover{color:var(--primary-hover);border-bottom-color:var(--primary-hover)}
.article-content strong{font-weight:600;color:var(--text)}
.article-content hr{border:none;border-top:1px solid var(--border);margin:2.4em 0}
.article-content table{width:100%;margin:1.7em 0;font-size:15px;border:1px solid var(--border);border-radius:12px;overflow:hidden}
.article-content th{background:var(--primary-soft);color:var(--text);font-weight:600;text-align:left}
.article-content th,.article-content td{padding:12px 14px;border-bottom:1px solid var(--border);font-variant-numeric:tabular-nums}
.article-content tr:last-child td{border-bottom:none}
.article-content pre{background:#F1F3F8;border:1px solid var(--border);border-radius:var(--r-card);padding:18px;overflow-x:auto;margin:1.7em 0;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:14px;line-height:1.7;color:var(--text-2)}
.article-content code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:14px;background:#F1F3F8;border-radius:6px;padding:2px 6px}
.article-content pre code{background:none;padding:0}
@media(max-width:767px){
  .article-content p,.article-content ul li,.article-content ol li{font-size:16px}
  .article-content table{display:block;overflow-x:auto;white-space:nowrap;border-radius:0}
}

/* ---------- 目录 ---------- */
.article-toc{position:sticky;top:96px;background:#fff;border:1px solid var(--border);border-radius:var(--r-card);padding:20px 16px 16px;box-shadow:var(--sh-1)}
.article-toc h2{font-size:15px;font-weight:600;color:var(--text);margin-bottom:12px;padding-left:10px;border-left:3px solid var(--accent)}
.article-toc ul li a{display:block;font-size:14px;line-height:1.6;color:var(--text-2);padding:8px 10px 8px 12px;border-left:2px solid transparent;border-radius:0 8px 8px 0;transition:background .2s ease,color .2s ease,border-color .2s ease}
.article-toc ul li a:hover{color:var(--primary);background:var(--primary-soft)}
.article-toc ul li a.is-current{color:var(--primary);font-weight:600;background:var(--primary-soft);border-left-color:var(--primary)}
@media(max-width:1279px){.article-toc{display:none}}

/* ---------- 空态 ---------- */
.empty-state{text-align:center;padding:64px 24px;background:#fff;border:1px dashed var(--border);border-radius:var(--r-banner)}
.empty-icon{width:52px;height:52px;margin:0 auto 18px;border-radius:14px;background:var(--primary-soft);color:var(--primary);display:grid;place-items:center;font-size:24px;font-weight:700}
.empty-state h2{font-size:22px;font-weight:700;color:var(--text)}
.empty-state p{margin:10px 0 22px;font-size:15px;color:var(--text-2)}

/* ---------- 文章尾部信息 ---------- */
.article-extra{max-width:860px;margin-top:28px;background:#fff;border:1px solid var(--border);border-radius:var(--r-card);padding:24px;box-shadow:var(--sh-1);display:flex;flex-direction:column;gap:18px}
.extra-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px}
.extra-label{font-size:13px;color:var(--text-3);letter-spacing:.04em;margin-right:2px}
.tag{display:inline-flex;align-items:center;height:30px;padding:0 13px;border-radius:var(--r-pill);background:var(--primary-soft);color:var(--primary);font-size:13px;transition:background .2s ease,color .2s ease}
.tag:hover{background:var(--primary);color:#fff}
.extra-row .link-plain{font-size:13px;color:var(--text-2);border-bottom:1px solid var(--border)}
.extra-row .link-plain:hover{color:var(--primary);border-bottom-color:var(--primary)}

/* ---------- 板块与卡片 ---------- */
.section{padding:72px 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:34px}
.section-head h2{font-size:clamp(24px,2.8vw,32px);font-weight:700;line-height:1.3}
.section-head .sub{margin-top:10px;font-size:15px;color:var(--text-2);max-width:56ch}
.text-link{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--primary)}
.text-link .arrow{transition:transform .24s ease}
.text-link:hover .arrow{transform:translateX(4px)}
.card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--border);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1);color:var(--text);transition:transform .24s ease,box-shadow .24s ease}
.card:hover{color:var(--text);transform:translateY(-4px);box-shadow:var(--sh-3)}
.card-media{position:relative;aspect-ratio:16/10;overflow:hidden;background:#E9EDF6}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .6s ease}
.card:hover .card-media img{transform:scale(1.03)}
.card-badge{position:absolute;left:12px;top:12px;height:26px;padding:0 10px;border-radius:var(--r-pill);background:rgba(255,255,255,.95);color:var(--primary);font-size:12px;font-weight:600;display:inline-flex;align-items:center;box-shadow:var(--sh-1)}
.card-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1}
.card-title{font-size:18px;font-weight:600;line-height:1.45;color:var(--text);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-text{font-size:14px;line-height:1.7;color:var(--text-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-foot{margin-top:auto;padding-top:14px;border-top:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--text-3);font-variant-numeric:tabular-nums}
.card-foot .arrow{color:var(--primary);font-weight:700;transition:transform .24s ease}
.card:hover .card-foot .arrow{transform:translateX(4px)}
.related-cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
@media(max-width:1023px){.related-cards{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:640px){.related-cards{grid-template-columns:1fr}}
.back-row{margin-top:28px}

/* ---------- CTA 条 ---------- */
.cta-band{background:var(--primary-soft);border-radius:var(--r-banner);padding:36px 40px;display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap}
.cta-band h2{font-size:clamp(20px,2.4vw,26px);font-weight:700;line-height:1.35}
.cta-band p{margin-top:10px;font-size:15px;color:var(--text-2);max-width:60ch}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}
@media(max-width:767px){.cta-band{padding:26px 22px}.cta-actions{width:100%}.cta-actions .btn{flex:1}}

/* ---------- FAQ ---------- */
.faq-list{max-width:860px}
.faq-item{border-bottom:1px solid var(--border)}
.faq-item:first-child{border-top:1px solid var(--border)}
.faq-item summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:58px;padding:16px 4px;font-size:17px;font-weight:600;color:var(--text)}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";flex:none;width:26px;height:26px;border-radius:50%;background:var(--primary-soft);color:var(--primary);display:grid;place-items:center;font-size:16px;font-weight:600;transition:transform .24s ease}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item .faq-answer{padding:0 4px 20px 4px;font-size:15px;line-height:1.85;color:var(--text-2);max-width:760px;border-left:3px solid var(--primary);padding-left:16px;margin-left:4px}

/* ---------- 页脚 ---------- */
.site-footer{background:#fff;border-top:1px solid var(--border);margin-top:72px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;padding:56px 0 40px}
.footer-brand p{margin-top:16px;font-size:14px;line-height:1.8;color:var(--text-2);max-width:330px}
.footer-col h3{font-size:15px;font-weight:600;color:var(--text);margin-bottom:16px}
.footer-col ul li{margin-bottom:10px}
.footer-col ul li a{font-size:14px;color:var(--text-2)}
.footer-col ul li a:hover{color:var(--primary)}
.contact-line{font-size:14px;color:var(--text-2)}
.footer-bottom{border-top:1px solid var(--border);padding:20px 0;display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:13px;color:var(--text-3)}
@media(max-width:1023px){.footer-grid{grid-template-columns:1fr 1fr;gap:32px}}
@media(max-width:600px){.footer-grid{grid-template-columns:1fr;gap:28px;padding:40px 0 28px}}

/* ---------- 浮动组件 ---------- */
.float-cta{position:fixed;right:24px;bottom:24px;width:220px;z-index:60;background:#fff;border:1px solid var(--border);border-radius:var(--r-card);padding:16px;box-shadow:var(--sh-3);opacity:0;visibility:hidden;transform:translateY(12px);transition:opacity .3s ease,transform .3s ease,visibility .3s ease}
.float-cta.is-show{opacity:1;visibility:visible;transform:translateY(0)}
.float-cta p{font-size:13px;line-height:1.6;color:var(--text-2);margin-bottom:10px}
.to-top{position:fixed;right:24px;bottom:212px;width:44px;height:44px;z-index:55;border-radius:12px;background:#fff;border:1px solid var(--border);box-shadow:var(--sh-2);color:var(--text-2);display:grid;place-items:center;cursor:pointer;opacity:0;visibility:hidden;transition:opacity .3s ease,visibility .3s ease,color .2s ease,border-color .2s ease}
.to-top.is-show{opacity:1;visibility:visible}
.to-top:hover{color:var(--primary);border-color:var(--primary)}
@media(max-width:767px){
  body{padding-bottom:72px}
  .float-cta{left:0;right:0;bottom:0;width:auto;border-radius:16px 16px 0 0;padding:10px 16px;border-left:none;border-right:none;border-bottom:none;transform:none;opacity:1;visibility:visible}
  .float-cta p{display:none}
  .to-top{display:none}
}

/* roulang page: category2 */
:root{
  --brand:#1D4ED8;
  --brand-hover:#1A44BF;
  --brand-press:#163AA3;
  --brand-soft:#E8EEFF;
  --accent:#F26522;
  --accent-soft:#FDEEE7;
  --teal:#0E9F8E;
  --teal-soft:#E6F5F3;
  --ink:#0B1220;
  --text:#47546A;
  --muted:#8A94A6;
  --line:#E5E9F2;
  --bg:#F4F6FB;
  --surface:#FFFFFF;
  --r-sm:10px;
  --r-md:16px;
  --r-lg:20px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(11,18,32,.06),0 1px 3px rgba(11,18,32,.04);
  --sh-2:0 12px 28px -14px rgba(11,18,32,.18);
  --sh-3:0 24px 48px -20px rgba(11,18,32,.24);
  --ease:240ms ease-out;
  --font:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.8;
  color:var(--text);
  background:var(--bg);
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--brand);text-decoration:none;transition:color var(--ease)}
a:hover{color:var(--brand-hover)}
button{font-family:inherit}
h1,h2,h3,h4{color:var(--ink);margin:0;font-weight:700;line-height:1.3}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:3px solid rgba(29,78,216,.35);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px}
@media(min-width:768px){.container{padding:0 32px}}
.num{font-family:var(--mono);font-variant-numeric:tabular-nums}

/* ============ 顶部信息条 ============ */
.topbar{background:rgba(29,78,216,.06);border-bottom:1px solid var(--line);font-size:13px;color:var(--text)}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;height:36px}
.topbar-inner span{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar-links{display:flex;gap:20px}
.topbar-links a{color:var(--text)}
.topbar-links a:hover{color:var(--brand)}
@media(max-width:767px){.topbar-links{display:none}}

/* ============ 头部与导航 ============ */
.site-header{position:sticky;top:0;z-index:60;background:var(--surface);transition:box-shadow var(--ease)}
.site-header.is-stuck{box-shadow:0 1px 0 var(--line),0 8px 20px -18px rgba(11,18,32,.35)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:72px}
.logo{display:flex;align-items:center;gap:10px;color:var(--ink);font-weight:700}
.logo:hover{color:var(--ink)}
.logo-mark{width:36px;height:36px;border-radius:11px;background:linear-gradient(135deg,var(--brand),#3B72F0);color:#fff;display:grid;place-items:center;font-size:18px;font-weight:800;box-shadow:var(--sh-1);letter-spacing:-.5px}
.logo-text{font-size:19px;letter-spacing:.5px}
.main-nav{display:flex;align-items:center;gap:4px}
.nav-link{position:relative;padding:10px 14px;font-size:15px;color:var(--text);border-radius:var(--r-sm);white-space:nowrap}
.nav-link:hover{color:var(--brand);background:var(--brand-soft)}
.nav-link.is-active{color:var(--brand);font-weight:600}
.nav-link.is-active::after{content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;background:var(--brand);border-radius:2px}
.header-actions{display:flex;align-items:center;gap:10px}
.mega-trigger{display:inline-flex;align-items:center;gap:6px;height:40px;padding:0 14px;border-radius:var(--r-sm);border:1px solid var(--line);background:var(--surface);color:var(--ink);font-size:14px;font-weight:600;cursor:pointer;transition:var(--ease)}
.mega-trigger:hover{border-color:var(--brand);color:var(--brand)}
.mega-trigger .caret{width:8px;height:8px;border-right:2px solid currentColor;border-bottom:2px solid currentColor;transform:rotate(45deg) translateY(-2px);transition:transform var(--ease)}
.mega.is-open .mega-trigger .caret{transform:rotate(225deg) translateY(-1px)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:44px;padding:0 20px;border-radius:var(--r-sm);font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;transition:var(--ease);text-align:center}
.btn-primary{background:var(--brand);color:#fff;box-shadow:var(--sh-1)}
.btn-primary:hover{background:var(--brand-hover);color:#fff;box-shadow:var(--sh-2)}
.btn-primary:active{background:var(--brand-press);transform:translateY(1px)}
.btn-ghost{background:var(--surface);border-color:var(--line);color:var(--brand)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand-hover);box-shadow:var(--sh-1)}
.btn-ghost:active{transform:translateY(1px)}
.btn-text{display:inline-flex;align-items:center;gap:6px;color:var(--brand);font-weight:600;font-size:15px}
.btn-text .arrow{transition:transform var(--ease)}
.btn-text:hover .arrow{transform:translateX(4px)}
.btn-block{width:100%}
.btn-sm{height:40px;padding:0 16px;font-size:14px}

/* ============ Mega 面板 ============ */
.mega{position:relative}
.mega-panel{position:absolute;top:calc(100% + 14px);right:0;width:760px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--sh-3);padding:24px;opacity:0;visibility:hidden;transform:translateY(-8px);transition:opacity var(--ease),transform var(--ease),visibility var(--ease);z-index:70}
.mega-panel.is-open{opacity:1;visibility:visible;transform:translateY(0)}
.mega-grid{display:grid;grid-template-columns:1fr 1fr 1.15fr;gap:24px}
.mega-col h4{font-size:13px;color:var(--muted);font-weight:600;letter-spacing:.5px;margin-bottom:12px}
.mega-col li+li{margin-top:9px}
.mega-link{display:flex;align-items:baseline;gap:8px;font-size:15px;color:var(--text)}
.mega-link:hover{color:var(--brand)}
.mega-link .idx{font-family:var(--mono);font-size:12px;color:var(--muted)}
.mega-post{display:block;padding:8px 0;border-bottom:1px dashed var(--line)}
.mega-post:last-child{border-bottom:0}
.mega-post strong{display:block;font-size:14px;color:var(--ink);font-weight:600;line-height:1.5}
.mega-post span{font-size:12px;color:var(--muted);font-family:var(--mono)}
.mega-card{border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;background:var(--surface);display:block;box-shadow:var(--sh-1);transition:var(--ease)}
.mega-card:hover{transform:translateY(-4px);box-shadow:var(--sh-3);color:inherit}
.mega-card img{width:100%;aspect-ratio:16/10;object-fit:cover}
.mega-card-body{padding:14px}
.mega-card-body span{display:inline-block;font-size:12px;color:var(--brand);background:var(--brand-soft);border-radius:var(--r-pill);padding:2px 10px;margin-bottom:8px}
.mega-card-body strong{display:block;font-size:14px;color:var(--ink);line-height:1.5}
@media(max-width:1023px){.mega{display:none}}
@media(max-width:1279px) and (min-width:1024px){.mega-panel{width:640px}}

/* ============ 移动端抽屉 ============ */
.nav-toggle{display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:var(--r-sm);background:var(--surface);cursor:pointer;position:relative}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{position:absolute;left:12px;width:20px;height:2px;background:var(--ink);border-radius:2px;transition:var(--ease)}
.nav-toggle span{top:21px}
.nav-toggle span::before{content:"";top:-6px;left:0}
.nav-toggle span::after{content:"";top:6px;left:0}
.nav-toggle.is-open span{background:transparent}
.nav-toggle.is-open span::before{transform:translateY(6px) rotate(45deg)}
.nav-toggle.is-open span::after{transform:translateY(-6px) rotate(-45deg)}
.drawer{position:fixed;inset:72px 0 0;background:var(--surface);z-index:55;padding:12px 20px 40px;overflow-y:auto;transform:translateX(100%);transition:transform 260ms ease-out;visibility:hidden}
.drawer.is-open{transform:translateX(0);visibility:visible}
.drawer-link{display:block;line-height:56px;height:56px;font-size:16px;color:var(--ink);border-bottom:1px solid var(--line);font-weight:600}
.drawer-link.is-active{color:var(--brand)}
.drawer-cta{margin-top:24px}
@media(max-width:1023px){
  .main-nav{display:none}
  .nav-toggle{display:block}
  .header-actions .btn-primary{display:none}
}

/* ============ 面包屑 ============ */
.breadcrumb{padding:20px 0 0;font-size:13px;color:var(--muted)}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumb li::after{content:"/";margin-left:8px;color:#C3CAD8}
.breadcrumb li:last-child::after{content:""}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .current{color:var(--ink);font-weight:600}

/* ============ 页面 Hero ============ */
.page-hero{padding:28px 0 0}
.hero-panel{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:40px;align-items:center;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--sh-2);padding:44px;overflow:hidden}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--brand);background:var(--brand-soft);border-radius:var(--r-pill);padding:5px 14px}
.hero-title{font-size:clamp(30px,4.4vw,44px);line-height:1.15;margin:18px 0 14px;letter-spacing:-.5px}
.hero-sub{font-size:17px;color:var(--text);max-width:560px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.hero-facts{display:flex;flex-wrap:wrap;gap:28px;margin-top:30px;padding-top:24px;border-top:1px solid var(--line)}
.hero-fact strong{display:block;font-size:24px;color:var(--brand);font-family:var(--mono);font-variant-numeric:tabular-nums;line-height:1.2}
.hero-fact span{font-size:13px;color:var(--muted)}
.hero-media{position:relative}
.hero-media img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-md);box-shadow:var(--sh-2)}
.hero-float{position:absolute;left:16px;bottom:16px;width:206px;background:var(--surface);border:1px solid var(--line);border-radius:14px;box-shadow:var(--sh-3);padding:14px}
.hero-float b{display:block;font-size:13px;color:var(--muted);font-weight:600}
.hero-float strong{display:block;font-size:20px;color:var(--ink);font-family:var(--mono);margin-top:4px}
.hero-float em{display:block;font-size:12px;color:var(--teal);font-style:normal;margin-top:4px}
@media(max-width:1023px){
  .hero-panel{grid-template-columns:1fr;gap:28px;padding:28px}
  .hero-media{order:-1}
}

/* ============ 区块通用 ============ */
.section{padding:72px 0 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:32px}
.section-num{font-family:var(--mono);font-size:13px;color:var(--brand);font-weight:600;letter-spacing:1px}
.section-title{font-size:clamp(22px,3vw,30px);margin-top:8px}
.section-desc{font-size:15px;color:var(--text);max-width:620px;margin-top:10px}
@media(min-width:1280px){.section{padding:96px 0 0}}

/* ============ 筛选标签行 ============ */
.filter-bar{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);padding:16px 20px;box-shadow:var(--sh-1);display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.filter-label{font-size:13px;color:var(--muted);font-weight:600;white-space:nowrap}
.filter-tags{display:flex;flex-wrap:wrap;gap:10px}
.filter-tag{display:inline-flex;align-items:center;height:36px;padding:0 16px;border-radius:var(--r-pill);border:1px solid var(--line);background:var(--surface);color:var(--text);font-size:14px;cursor:pointer;transition:var(--ease)}
.filter-tag:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-soft)}
.filter-tag.is-on{background:var(--brand);border-color:var(--brand);color:#fff}
.filter-tag:active{transform:translateY(1px)}
.filter-count{margin-left:auto;font-size:13px;color:var(--muted);font-family:var(--mono)}

/* ============ 卡片画廊 2×3 ============ */
.gallery-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:28px}
.gallery-card{display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;box-shadow:var(--sh-1);transition:transform var(--ease),box-shadow var(--ease);color:inherit}
.gallery-card:hover{transform:translateY(-4px);box-shadow:var(--sh-3);color:inherit}
.card-media{position:relative;overflow:hidden}
.card-media img{width:100%;aspect-ratio:4/3;object-fit:cover;transition:transform 600ms ease-out}
.gallery-card:hover .card-media img{transform:scale(1.03)}
.card-badge{position:absolute;left:12px;top:12px;background:var(--surface);border-radius:var(--r-pill);padding:4px 12px;font-size:12px;font-weight:600;color:var(--brand);box-shadow:var(--sh-1)}
.card-badge.warm{color:var(--accent)}
.card-body{padding:20px;display:flex;flex-direction:column;flex:1}
.card-title{font-size:18px;line-height:1.5}
.card-text{font-size:14px;color:var(--text);margin-top:10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-meta{margin-top:auto;padding-top:16px;border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--muted);font-family:var(--mono)}
.card-meta .arrow{color:var(--brand);font-family:var(--font);transition:transform var(--ease)}
.gallery-card:hover .card-meta .arrow{transform:translateX(4px)}
@media(max-width:1023px){.gallery-grid{grid-template-columns:repeat(2,1fr);gap:16px}}
@media(max-width:559px){.gallery-grid{grid-template-columns:1fr}}

/* ============ 规格表 ============ */
.table-wrap{margin-top:28px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--sh-1);overflow-x:auto}
.spec-table{width:100%;border-collapse:collapse;min-width:760px}
.spec-table caption{text-align:left;padding:20px 24px 0;font-size:14px;color:var(--muted)}
.spec-table th,.spec-table td{padding:16px 24px;text-align:left;font-size:14px;border-bottom:1px solid var(--line)}
.spec-table thead th{background:#F8FAFF;color:var(--ink);font-size:13px;font-weight:600;letter-spacing:.3px;white-space:nowrap}
.spec-table tbody th{font-weight:600;color:var(--ink);white-space:nowrap}
.spec-table td{color:var(--text)}
.spec-table tbody tr:last-child th,.spec-table tbody tr:last-child td{border-bottom:0}
.spec-table tbody tr:hover td,.spec-table tbody tr:hover th{background:#FAFBFF}
.spec-table .num{color:var(--ink)}

/* ============ 流程 ============ */
.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:32px;position:relative}
.flow-step{position:relative;padding-top:26px}
.flow-step::before{content:"";position:absolute;top:9px;left:0;right:-24px;height:1px;border-top:1px dashed #C9D2E4}
.flow-step:last-child::before{right:0}
.flow-dot{position:absolute;top:2px;left:0;width:16px;height:16px;border-radius:50%;background:var(--surface);border:3px solid var(--brand)}
.flow-step h3{font-size:17px;margin-bottom:8px}
.flow-step p{font-size:14px;color:var(--text)}
@media(max-width:767px){
  .flow{grid-template-columns:1fr;gap:20px}
  .flow-step{padding-top:0;padding-left:28px}
  .flow-step::before{top:0;bottom:-20px;left:7px;right:auto;width:1px;height:auto;border-top:0;border-left:1px dashed #C9D2E4}
  .flow-step:last-child::before{display:none}
  .flow-dot{top:4px;left:0}
}

/* ============ 保障数据条 ============ */
.assurance{margin-top:32px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--sh-1);display:grid;grid-template-columns:repeat(4,1fr)}
.assurance-item{padding:26px 24px;border-right:1px solid var(--line)}
.assurance-item:last-child{border-right:0}
.assurance-item strong{display:block;font-size:32px;color:var(--brand);font-family:var(--mono);font-variant-numeric:tabular-nums;line-height:1.1}
.assurance-item span{display:block;font-size:13px;color:var(--muted);margin-top:6px}
.assurance-item em{display:block;font-size:14px;color:var(--text);font-style:normal;margin-top:10px}
@media(max-width:1023px){
  .assurance{grid-template-columns:repeat(2,1fr)}
  .assurance-item:nth-child(2){border-right:0}
  .assurance-item:nth-child(1),.assurance-item:nth-child(2){border-bottom:1px solid var(--line)}
}
@media(max-width:559px){
  .assurance{grid-template-columns:1fr}
  .assurance-item{border-right:0;border-bottom:1px solid var(--line)}
  .assurance-item:last-child{border-bottom:0}
}

/* ============ 服务说明图文 ============ */
.two-col{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:40px;align-items:center;margin-top:32px}
.two-col img{width:100%;aspect-ratio:3/2;object-fit:cover;border-radius:var(--r-md);box-shadow:var(--sh-2)}
.list-check li{position:relative;padding-left:24px;font-size:15px;color:var(--text);margin-bottom:12px}
.list-check li::before{content:"";position:absolute;left:0;top:11px;width:8px;height:8px;background:var(--brand);border-radius:2px}
@media(max-width:1023px){.two-col{grid-template-columns:1fr}}

/* ============ FAQ ============ */
.faq-list{margin-top:28px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--sh-1);overflow:hidden;max-width:900px}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item:last-child{border-bottom:0}
.faq-item summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:64px;padding:18px 24px;font-size:17px;font-weight:600;color:var(--ink);transition:var(--ease)}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{background:#FAFBFF;color:var(--brand)}
.faq-item summary .mark{position:relative;flex:0 0 16px;width:16px;height:16px}
.faq-item summary .mark::before,.faq-item summary .mark::after{content:"";position:absolute;background:var(--brand);border-radius:2px;transition:transform var(--ease)}
.faq-item summary .mark::before{left:0;top:7px;width:16px;height:2px}
.faq-item summary .mark::after{left:7px;top:0;width:2px;height:16px}
.faq-item[open] summary{color:var(--brand);border-left:3px solid var(--brand);padding-left:21px}
.faq-item[open] summary .mark::after{transform:rotate(180deg) scaleY(0)}
.faq-answer{padding:0 24px 22px;font-size:15px;line-height:1.8;color:var(--text);max-width:760px;border-left:3px solid transparent}

/* ============ 相关分类 ============ */
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:28px}
.related-card{display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;box-shadow:var(--sh-1);transition:var(--ease);color:inherit}
.related-card:hover{transform:translateY(-4px);box-shadow:var(--sh-3);color:inherit}
.related-card img{width:100%;aspect-ratio:16/10;object-fit:cover}
.related-body{padding:20px}
.related-body h3{font-size:18px}
.related-body p{font-size:14px;margin-top:8px}
.related-body .go{display:inline-flex;align-items:center;gap:6px;margin-top:14px;font-size:14px;font-weight:600;color:var(--brand)}
.related-card:hover .go{color:var(--brand-hover)}
@media(max-width:1023px){.related-grid{grid-template-columns:repeat(2,1fr);gap:16px}}
@media(max-width:559px){.related-grid{grid-template-columns:1fr}}

/* ============ 结尾 CTA ============ */
.cta-band{margin-top:80px;background:var(--brand-soft);border-radius:var(--r-lg);padding:40px;display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap}
.cta-band h2{font-size:clamp(22px,2.6vw,28px)}
.cta-band p{font-size:15px;color:var(--text);margin-top:10px;max-width:620px}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}
@media(min-width:1280px){.cta-band{margin-top:104px;padding:48px}}
@media(max-width:559px){.cta-band{padding:28px;margin-top:56px}}

/* ============ 页脚 ============ */
.site-footer{margin-top:88px;background:var(--surface);border-top:1px solid var(--line);padding:56px 0 0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px}
.footer-brand p{font-size:14px;color:var(--text);margin-top:14px;max-width:330px}
.footer-col h3{font-size:15px;font-weight:600;margin-bottom:14px}
.footer-col li{margin-bottom:9px}
.footer-col a{font-size:14px;color:var(--text)}
.footer-col a:hover{color:var(--brand)}
.contact-line{font-size:14px;color:var(--text)}
.footer-bottom{margin-top:44px;border-top:1px solid var(--line);padding:20px 0;display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:13px;color:var(--muted)}
@media(max-width:1023px){.footer-grid{grid-template-columns:1fr 1fr}}
@media(max-width:559px){.footer-grid{grid-template-columns:1fr}}

/* ============ 浮动组件 ============ */
.float-cta{position:fixed;right:24px;bottom:88px;width:224px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--sh-3);padding:16px;opacity:0;visibility:hidden;transform:translateY(12px);transition:var(--ease);z-index:50}
.float-cta.is-show{opacity:1;visibility:visible;transform:translateY(0)}
.float-cta p{font-size:13px;color:var(--text);margin-bottom:12px}
.to-top{position:fixed;right:24px;bottom:24px;width:48px;height:48px;border-radius:var(--r-sm);border:1px solid var(--line);background:var(--surface);color:var(--brand);cursor:pointer;box-shadow:var(--sh-2);display:grid;place-items:center;opacity:0;visibility:hidden;transition:var(--ease);z-index:50}
.to-top.is-show{opacity:1;visibility:visible}
.to-top:hover{background:var(--brand);color:#fff;border-color:var(--brand)}
.to-top .arrow{width:10px;height:10px;border-left:2px solid currentColor;border-top:2px solid currentColor;transform:rotate(45deg)}
@media(max-width:767px){
  body{padding-bottom:72px}
  .float-cta{left:0;right:0;bottom:0;width:100%;border-radius:0;padding:10px 16px;transform:translateY(100%)}
  .float-cta.is-show{transform:translateY(0)}
  .float-cta p{display:none}
  .to-top{bottom:80px;right:16px;width:44px;height:44px}
}

/* roulang page: category3 */
:root{
  --brand:#1D4ED8;
  --brand-hover:#1A44BF;
  --brand-active:#163AA3;
  --brand-soft:#E8EEFF;
  --accent:#F26522;
  --accent-soft:#FDEDE4;
  --teal:#0E9F8E;
  --teal-soft:#E2F5F2;
  --text:#0B1220;
  --text-2:#47546A;
  --text-3:#8A94A6;
  --line:#E5E9F2;
  --bg:#F4F6FB;
  --surface:#FFFFFF;
  --radius-sm:10px;
  --radius:16px;
  --radius-lg:22px;
  --shadow-1:0 1px 2px rgba(11,18,32,.06),0 1px 3px rgba(11,18,32,.04);
  --shadow-2:0 12px 28px -14px rgba(11,18,32,.18);
  --shadow-3:0 24px 48px -20px rgba(11,18,32,.24);
  --container:1200px;
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--text);
  background:var(--bg);
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:var(--brand);text-decoration:none;transition:color .2s var(--ease);}
a:hover{color:var(--brand-hover);}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding:0;list-style:none;}
button{font-family:inherit;font-size:inherit;cursor:pointer;border:none;background:none;color:inherit;}
input,select,textarea{font-family:inherit;font-size:inherit;color:inherit;}
:focus-visible{outline:3px solid rgba(29,78,216,.35);outline-offset:2px;border-radius:4px;}

.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 32px;
}
@media (max-width:767px){
  .container{padding:0 20px;}
}

/* ============ Header ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(255,255,255,.96);
  border-bottom:1px solid transparent;
  transition:box-shadow .25s var(--ease),border-color .25s var(--ease);
}
.site-header.is-scrolled{
  border-bottom-color:var(--line);
  box-shadow:0 1px 3px rgba(11,18,32,.06);
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  min-height:72px;
}
.logo{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:var(--text);
  font-weight:700;
  font-size:18px;
  letter-spacing:.02em;
  flex-shrink:0;
}
.logo:hover{color:var(--text);}
.logo-mark{
  width:34px;height:34px;
  display:grid;place-items:center;
  border-radius:11px;
  background:var(--brand);
  color:#fff;
  font-size:17px;
  font-weight:800;
  box-shadow:0 6px 14px -6px rgba(29,78,216,.7);
}
.logo-text{white-space:nowrap;}
.main-nav{
  display:flex;
  align-items:center;
  gap:4px;
  flex:1 1 auto;
  justify-content:center;
}
.nav-link{
  position:relative;
  display:inline-block;
  padding:24px 12px;
  font-size:15px;
  color:var(--text-2);
  font-weight:500;
  white-space:nowrap;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:12px;right:12px;bottom:14px;
  height:2px;
  border-radius:2px;
  background:var(--brand);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .24s var(--ease);
}
.nav-link:hover{color:var(--brand);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.is-active{color:var(--brand);font-weight:600;}
.nav-link.is-active::after{transform:scaleX(1);}
.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:46px;
  padding:0 22px;
  border-radius:var(--radius-sm);
  font-size:15px;
  font-weight:600;
  line-height:1;
  border:1px solid transparent;
  transition:background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease),transform .12s var(--ease);
}
.btn-sm{min-height:40px;padding:0 16px;font-size:14px;}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 18px -10px rgba(29,78,216,.8);}
.btn-primary:hover{background:var(--brand-hover);color:#fff;box-shadow:0 12px 24px -10px rgba(29,78,216,.85);}
.btn-primary:active{background:var(--brand-active);color:#fff;transform:translateY(1px);}
.btn-ghost{background:#fff;color:var(--brand);border-color:var(--line);box-shadow:var(--shadow-1);}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand-hover);background:#fff;}
.btn-ghost:active{transform:translateY(1px);}
.btn-link{
  display:inline-flex;
  align-items:center;
  gap:6px;
  color:var(--brand);
  font-weight:600;
  font-size:15px;
  padding:4px 0;
  border-bottom:2px solid transparent;
  transition:border-color .2s var(--ease),color .2s var(--ease);
}
.btn-link:hover{border-bottom-color:var(--brand);color:var(--brand-hover);}
.btn-link .arrow{transition:transform .24s var(--ease);}
.btn-link:hover .arrow{transform:translateX(4px);}

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

.mobile-drawer{
  display:none;
  border-top:1px solid var(--line);
  background:#fff;
  padding:8px 0 20px;
}
.mobile-drawer.is-open{display:block;}
.mobile-drawer .container{display:flex;flex-direction:column;}
.mobile-drawer a{
  display:flex;
  align-items:center;
  justify-content:space-between;
  min-height:56px;
  padding:0 4px;
  font-size:16px;
  color:var(--text);
  border-bottom:1px solid var(--line);
}
.mobile-drawer a.is-active{color:var(--brand);font-weight:600;}
.mobile-drawer .drawer-cta{margin-top:16px;}
.mobile-drawer .drawer-cta .btn{width:100%;}

@media (max-width:1023px){
  .main-nav{display:none;}
  .nav-toggle{display:inline-flex;}
  .header-actions .btn-sm{display:none;}
}
@media (max-width:520px){
  .logo-text{font-size:16px;}
  .header-inner{min-height:64px;}
}

/* ============ Breadcrumb ============ */
.breadcrumb{
  padding:20px 0 0;
  font-size:13px;
  color:var(--text-3);
}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;}
.breadcrumb li{display:flex;align-items:center;gap:8px;}
.breadcrumb li + li::before{content:"/";color:var(--text-3);}
.breadcrumb a{color:var(--text-2);}
.breadcrumb a:hover{color:var(--brand);}
.breadcrumb .current{color:var(--text);font-weight:600;}

/* ============ Hero ============ */
.page-hero{padding:28px 0 0;}
.hero-card{
  position:relative;
  display:grid;
  grid-template-columns:1.05fr .95fr;
  gap:44px;
  align-items:center;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-1);
  padding:52px;
  overflow:hidden;
}
.hero-card::before{
  content:"";
  position:absolute;
  right:-120px;top:-120px;
  width:340px;height:340px;
  border-radius:50%;
  border:1px solid rgba(29,78,216,.14);
  box-shadow:0 0 0 40px rgba(29,78,216,.05),0 0 0 88px rgba(29,78,216,.03);
  pointer-events:none;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:6px 14px;
  border-radius:999px;
  background:var(--brand-soft);
  color:var(--brand);
  font-size:13px;
  font-weight:600;
  letter-spacing:.02em;
}
.hero-copy h1{
  margin:18px 0 0;
  font-size:clamp(32px,4.2vw,50px);
  line-height:1.15;
  font-weight:700;
  letter-spacing:-.01em;
}
.hero-copy .hero-sub{
  margin-top:16px;
  font-size:17px;
  line-height:1.8;
  color:var(--text-2);
  max-width:520px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px;}
.hero-facts{
  display:flex;
  flex-wrap:wrap;
  gap:12px 32px;
  margin-top:32px;
  padding-top:24px;
  border-top:1px solid var(--line);
}
.hero-fact strong{
  display:block;
  font-size:24px;
  font-weight:700;
  color:var(--brand);
  font-variant-numeric:tabular-nums;
  line-height:1.3;
}
.hero-fact span{font-size:13px;color:var(--text-3);}

.hero-visual{position:relative;}
.hero-visual img{
  width:100%;
  aspect-ratio:4/3;
  object-fit:cover;
  border-radius:var(--radius);
  box-shadow:var(--shadow-2);
}
.float-card{
  position:absolute;
  left:-18px;
  bottom:22px;
  width:210px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:14px;
  box-shadow:var(--shadow-3);
  padding:16px 18px;
}
.float-card .fc-label{font-size:12px;color:var(--text-3);letter-spacing:.04em;}
.float-card .fc-value{
  font-size:26px;
  font-weight:700;
  color:var(--accent);
  font-variant-numeric:tabular-nums;
  line-height:1.3;
  margin-top:2px;
}
.float-card .fc-note{font-size:12px;color:var(--text-2);line-height:1.6;margin-top:4px;}

@media (max-width:1023px){
  .hero-card{grid-template-columns:1fr;gap:32px;padding:36px;}
  .hero-visual{order:-1;}
  .float-card{left:12px;}
}
@media (max-width:520px){
  .hero-card{padding:26px 20px;}
  .hero-actions .btn{width:100%;}
  .float-card{width:180px;padding:12px 14px;left:8px;bottom:12px;}
  .float-card .fc-value{font-size:22px;}
}

/* ============ Sections ============ */
.section{padding:96px 0 0;}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:28px;
  margin-bottom:40px;
}
.section-head .num{
  display:inline-block;
  font-size:13px;
  font-weight:700;
  color:var(--brand);
  letter-spacing:.16em;
  font-variant-numeric:tabular-nums;
}
.section-head h2{
  margin-top:10px;
  font-size:clamp(24px,3vw,34px);
  line-height:1.3;
  font-weight:700;
  letter-spacing:-.01em;
}
.section-head p{
  margin-top:12px;
  font-size:15px;
  color:var(--text-2);
  max-width:640px;
}

/* ============ Timeline ============ */
.timeline-wrap{
  display:grid;
  grid-template-columns:minmax(0,1.55fr) minmax(0,1fr);
  gap:48px;
  align-items:start;
}
.timeline{
  position:relative;
  padding-left:36px;
}
.timeline::before{
  content:"";
  position:absolute;
  left:9px;top:14px;bottom:14px;
  width:2px;
  background:linear-gradient(180deg,var(--brand) 0%,rgba(29,78,216,.12) 100%);
  border-radius:2px;
}
.tl-item{position:relative;padding-bottom:34px;}
.tl-item:last-child{padding-bottom:0;}
.tl-dot{
  position:absolute;
  left:-36px;top:8px;
  width:20px;height:20px;
  border-radius:50%;
  background:#fff;
  border:2px solid var(--brand);
  box-shadow:0 0 0 4px rgba(29,78,216,.10);
}
.tl-item:nth-child(2n) .tl-dot{border-color:var(--accent);box-shadow:0 0 0 4px rgba(242,101,34,.12);}
.tl-item:nth-child(3n) .tl-dot{border-color:var(--teal);box-shadow:0 0 0 4px rgba(14,159,142,.12);}
.tl-head{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:12px;
}
.tl-step{
  font-size:13px;
  font-weight:700;
  color:var(--brand);
  font-variant-numeric:tabular-nums;
  letter-spacing:.08em;
}
.tl-head h3{font-size:20px;font-weight:600;line-height:1.4;}
.tl-time{
  font-size:13px;
  color:var(--text-3);
  padding:3px 10px;
  border-radius:999px;
  background:var(--bg);
  font-variant-numeric:tabular-nums;
}
.tl-item > p{
  margin-top:8px;
  font-size:15px;
  color:var(--text-2);
  line-height:1.8;
  max-width:640px;
}
.tl-points{margin-top:10px;display:flex;flex-direction:column;gap:6px;}
.tl-points li{
  position:relative;
  padding-left:18px;
  font-size:14px;
  color:var(--text-2);
  line-height:1.75;
}
.tl-points li::before{
  content:"";
  position:absolute;
  left:0;top:.72em;
  width:6px;height:6px;
  border-radius:2px;
  background:var(--brand);
  opacity:.85;
}

/* ============ Aside panel ============ */
.aside-panel{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow-1);
  padding:28px;
  position:sticky;
  top:96px;
}
.aside-panel h3{font-size:18px;font-weight:600;line-height:1.4;}
.aside-panel > p{margin-top:10px;font-size:14px;color:var(--text-2);line-height:1.8;}
.aside-img{
  margin-top:20px;
  border-radius:14px;
  overflow:hidden;
}
.aside-img img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.aside-list{margin-top:20px;display:flex;flex-direction:column;}
.aside-list li{
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  gap:14px;
  padding:12px 0;
  border-bottom:1px solid var(--line);
  font-size:14px;
  color:var(--text-2);
}
.aside-list li:last-child{border-bottom:none;}
.aside-list strong{
  color:var(--text);
  font-weight:600;
  font-variant-numeric:tabular-nums;
}
.aside-panel .btn{width:100%;margin-top:22px;}

@media (max-width:1023px){
  .timeline-wrap{grid-template-columns:1fr;gap:32px;}
  .aside-panel{position:static;}
  .section{padding:72px 0 0;}
  .section-head{flex-direction:column;align-items:flex-start;gap:14px;margin-bottom:30px;}
}

/* ============ Cooperation grid ============ */
.coop-grid{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:20px;
}
.coop-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow-1);
  padding:26px 24px;
  transition:transform .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease);
}
.coop-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-3);border-color:rgba(29,78,216,.28);}
.coop-icon{
  width:42px;height:42px;
  border-radius:12px;
  display:grid;place-items:center;
  background:var(--brand-soft);
  color:var(--brand);
  font-size:18px;
  font-weight:700;
}
.coop-card h3{margin-top:16px;font-size:18px;font-weight:600;line-height:1.4;}
.coop-card p{margin-top:8px;font-size:14px;color:var(--text-2);line-height:1.8;}
.coop-card .tagline{
  display:inline-block;
  margin-top:14px;
  font-size:13px;
  color:var(--teal);
  background:var(--teal-soft);
  padding:3px 10px;
  border-radius:999px;
}

/* ============ Price cards ============ */
.price-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:24px;
}
.price-card{
  display:flex;
  flex-direction:column;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow-1);
  padding:32px;
  position:relative;
  transition:transform .24s var(--ease),box-shadow .24s var(--ease);
}
.price-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-3);}
.price-card.is-featured{
  border-color:rgba(29,78,216,.35);
  box-shadow:var(--shadow-2);
}
.price-card.is-featured::before{
  content:"";
  position:absolute;
  left:32px;right:32px;top:0;
  height:3px;
  border-radius:0 0 3px 3px;
  background:var(--brand);
}
.price-badge{
  position:absolute;
  top:-13px;right:28px;
  padding:4px 12px;
  border-radius:999px;
  background:var(--accent);
  color:#fff;
  font-size:12px;
  font-weight:600;
  box-shadow:0 8px 16px -10px rgba(242,101,34,.9);
}
.price-card h3{font-size:20px;font-weight:600;line-height:1.4;}
.price-card .price-desc{margin-top:8px;font-size:14px;color:var(--text-2);line-height:1.75;}
.price-figure{
  display:flex;
  align-items:baseline;
  gap:8px;
  margin:22px 0 4px;
  padding-bottom:22px;
  border-bottom:1px solid var(--line);
}
.price-figure .amount{
  font-size:38px;
  font-weight:700;
  color:var(--text);
  font-variant-numeric:tabular-nums;
  line-height:1;
  letter-spacing:-.02em;
}
.price-figure .unit{font-size:14px;color:var(--text-3);}
.price-list{margin-top:20px;display:flex;flex-direction:column;gap:10px;flex:1 1 auto;}
.price-list li{
  position:relative;
  padding-left:26px;
  font-size:14.5px;
  color:var(--text-2);
  line-height:1.7;
}
.price-list li::before{
  content:"";
  position:absolute;
  left:0;top:.55em;
  width:14px;height:8px;
  border-left:2px solid var(--brand);
  border-bottom:2px solid var(--brand);
  transform:rotate(-45deg);
  border-radius:1px;
}
.price-card .btn{width:100%;margin-top:26px;}
.price-note{
  margin-top:16px;
  font-size:13px;
  color:var(--text-3);
  text-align:center;
}

/* ============ Split feature ============ */
.split{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:48px;
  align-items:center;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-1);
  padding:40px;
}
.split img{width:100%;aspect-ratio:16/11;object-fit:cover;border-radius:var(--radius);box-shadow:var(--shadow-2);}
.split h3{font-size:24px;font-weight:700;line-height:1.4;}
.split p{margin-top:14px;font-size:15px;color:var(--text-2);line-height:1.85;}
.check-list{margin-top:22px;display:grid;grid-template-columns:1fr 1fr;gap:10px 22px;}
.check-list li{
  position:relative;
  padding-left:22px;
  font-size:14.5px;
  color:var(--text-2);
  line-height:1.75;
}
.check-list li::before{
  content:"";
  position:absolute;
  left:0;top:.6em;
  width:10px;height:10px;
  border-radius:3px;
  background:var(--accent-soft);
  border:2px solid var(--accent);
}

/* ============ FAQ ============ */
.faq-wrap{max-width:860px;}
.faq-item{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow-1);
  margin-bottom:14px;
  overflow:hidden;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.faq-item[open]{border-color:rgba(29,78,216,.3);box-shadow:var(--shadow-2);}
.faq-item summary{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  list-style:none;
  cursor:pointer;
  padding:20px 24px;
  min-height:60px;
  font-size:17px;
  font-weight:600;
  line-height:1.6;
  color:var(--text);
  transition:color .2s var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:var(--brand);}
.faq-item summary::after{
  content:"";
  flex:0 0 auto;
  width:12px;height:12px;
  border-right:2px solid var(--brand);
  border-bottom:2px solid var(--brand);
  transform:rotate(45deg);
  transition:transform .24s var(--ease);
  margin-top:-4px;
}
.faq-item[open] summary::after{transform:rotate(-135deg);margin-top:4px;}
.faq-body{
  padding:0 24px 22px 24px;
  border-left:3px solid var(--brand);
  margin-left:0;
}
.faq-body p{font-size:15px;line-height:1.85;color:var(--text-2);max-width:760px;}

/* ============ Related categories ============ */
.cat-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;
}
.cat-card{
  display:flex;
  flex-direction:column;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow-1);
  overflow:hidden;
  color:var(--text);
  transition:transform .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease);
}
.cat-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-3);border-color:rgba(29,78,216,.28);color:var(--text);}
.cat-thumb{overflow:hidden;}
.cat-thumb img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .6s var(--ease);}
.cat-card:hover .cat-thumb img{transform:scale(1.03);}
.cat-body{padding:22px;display:flex;flex-direction:column;flex:1 1 auto;}
.cat-body h3{font-size:18px;font-weight:600;line-height:1.45;}
.cat-body p{margin-top:8px;font-size:14px;color:var(--text-2);line-height:1.75;flex:1 1 auto;}
.cat-foot{
  display:flex;
  align-items:center;
  justify-content:space-between;
  margin-top:18px;
  padding-top:14px;
  border-top:1px solid var(--line);
  font-size:13px;
  color:var(--text-3);
  font-variant-numeric:tabular-nums;
}
.cat-foot .go{color:var(--brand);font-weight:600;transition:transform .24s var(--ease);}
.cat-card:hover .cat-foot .go{transform:translateX(4px);}

/* ============ CTA ============ */
.cta-band{
  margin-top:96px;
  background:var(--brand-soft);
  border:1px solid rgba(29,78,216,.16);
  border-radius:var(--radius-lg);
  padding:44px;
  display:grid;
  grid-template-columns:1.1fr .9fr;
  gap:44px;
  align-items:center;
}
.cta-band h2{font-size:clamp(24px,2.8vw,32px);font-weight:700;line-height:1.3;}
.cta-band p{margin-top:14px;font-size:15px;color:var(--text-2);line-height:1.85;max-width:560px;}
.cta-contact{
  display:flex;
  flex-wrap:wrap;
  gap:12px 28px;
  margin-top:22px;
  padding-top:20px;
  border-top:1px solid rgba(29,78,216,.18);
}
.cta-contact div{font-size:14px;color:var(--text-2);}
.cta-contact strong{color:var(--text);font-weight:600;}

.form-card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow-2);
  padding:28px;
}
.form-card h3{font-size:18px;font-weight:600;}
.form-card .form-hint{margin-top:6px;font-size:13px;color:var(--text-3);}
.field{margin-top:16px;}
.field label{display:block;font-size:13px;color:var(--text-2);margin-bottom:6px;}
.field input,
.field select{
  width:100%;
  height:46px;
  padding:0 14px;
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  background:#fff;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.field input:focus,
.field select:focus{
  outline:none;
  border-color:var(--brand);
  box-shadow:0 0 0 3px rgba(29,78,216,.16);
}
.form-card .btn{width:100%;margin-top:20px;}
.form-msg{
  margin-top:14px;
  display:none;
  padding:10px 14px;
  border-radius:var(--radius-sm);
  background:var(--teal-soft);
  border:1px solid rgba(14,159,142,.3);
  color:#0a6f63;
  font-size:13.5px;
}
.form-msg.is-visible{display:block;}

@media (max-width:1023px){
  .coop-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .split{grid-template-columns:1fr;gap:28px;padding:28px;}
  .cat-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .cta-band{grid-template-columns:1fr;gap:28px;padding:32px;margin-top:72px;}
  .price-grid{gap:20px;}
}
@media (max-width:767px){
  .price-grid{grid-template-columns:1fr;}
  .cat-grid{grid-template-columns:1fr;}
  .check-list{grid-template-columns:1fr;}
  .timeline{padding-left:30px;}
  .tl-dot{left:-30px;}
  .tl-item > p{font-size:14.5px;}
}
@media (max-width:520px){
  .coop-grid{grid-template-columns:1fr;}
  .coop-card{padding:22px 20px;}
  .price-card{padding:26px 20px;}
  .price-card.is-featured::before{left:20px;right:20px;}
  .cta-band{padding:24px 20px;}
  .form-card{padding:22px 20px;}
  .faq-item summary{padding:16px 18px;font-size:15.5px;}
  .faq-body{padding:0 18px 18px 18px;}
}

/* ============ Footer ============ */
.site-footer{
  margin-top:104px;
  background:#fff;
  border-top:1px solid var(--line);
  padding:64px 0 28px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:40px;
}
.footer-brand .logo{margin-bottom:16px;}
.footer-brand p{font-size:14px;color:var(--text-2);line-height:1.85;max-width:320px;}
.footer-col h3{
  font-size:15px;
  font-weight:600;
  color:var(--text);
  margin-bottom:16px;
}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col a{font-size:14px;color:var(--text-2);}
.footer-col a:hover{color:var(--brand);}
.footer-col .contact-line{font-size:14px;color:var(--text-2);line-height:1.7;}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  margin-top:48px;
  padding-top:22px;
  border-top:1px solid var(--line);
  font-size:13px;
  color:var(--text-3);
}
@media (max-width:1023px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .site-footer{padding:52px 0 24px;margin-top:80px;}
}
@media (max-width:520px){
  .footer-grid{grid-template-columns:1fr;gap:28px;}
}

/* ============ Back to top ============ */
.to-top{
  position:fixed;
  right:24px;
  bottom:24px;
  width:46px;height:46px;
  border-radius:14px;
  background:#fff;
  border:1px solid var(--line);
  box-shadow:var(--shadow-2);
  display:grid;
  place-items:center;
  color:var(--brand);
  opacity:0;
  visibility:hidden;
  transform:translateY(10px);
  transition:opacity .25s var(--ease),transform .25s var(--ease),visibility .25s var(--ease);
  z-index:70;
}
.to-top.is-visible{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{background:var(--brand);color:#fff;border-color:var(--brand);}
@media (max-width:520px){
  .to-top{right:16px;bottom:16px;width:42px;height:42px;}
}

/* roulang page: category4 */
:root{
  --brand:#1D4ED8;
  --brand-hover:#1A44BF;
  --brand-active:#163AA3;
  --brand-soft:#E8EEFF;
  --accent:#F26522;
  --accent-soft:#FDEEE6;
  --teal:#0E9F8E;
  --teal-soft:#E4F5F2;
  --ink:#0B1220;
  --ink-2:#47546A;
  --ink-3:#8A94A6;
  --line:#E5E9F2;
  --bg:#F4F6FB;
  --surface:#FFFFFF;
  --r-sm:10px;
  --r-md:16px;
  --r-lg:22px;
  --pill:999px;
  --sh1:0 1px 2px rgba(11,18,32,.06),0 1px 3px rgba(11,18,32,.04);
  --sh2:0 12px 28px -14px rgba(11,18,32,.18);
  --sh3:0 24px 48px -20px rgba(11,18,32,.24);
  --container:1200px;
  --sec:clamp(56px,7vw,104px);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;line-height:1.8;color:var(--ink);background:var(--bg);
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--brand);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--brand-hover)}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul{padding:0;list-style:none}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit}
:focus-visible{outline:3px solid rgba(29,78,216,.35);outline-offset:2px;border-radius:6px}
.container{max-width:var(--container);margin:0 auto;padding:0 20px;width:100%}
@media(min-width:768px){.container{padding:0 32px}}

/* ---------- 顶条 ---------- */
.topbar{background:rgba(29,78,216,.06);border-bottom:1px solid rgba(29,78,216,.08);font-size:13px;color:var(--ink-2)}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:36px}
.topbar-note{display:none}
.topbar-meta{display:flex;align-items:center;gap:10px;margin-left:auto}
.topbar-meta a{color:var(--brand);font-weight:600}
.dot{width:4px;height:4px;border-radius:50%;background:var(--ink-3);display:inline-block}
@media(min-width:768px){.topbar-note{display:block}}

/* ---------- 导航 ---------- */
.site-header{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.96);transition:box-shadow .24s ease,border-color .24s ease}
.site-header::after{content:"";display:block;height:1px;background:transparent;transition:background .24s ease}
.site-header.is-scrolled{box-shadow:var(--sh1)}
.site-header.is-scrolled::after{background:var(--line)}
.header-inner{display:flex;align-items:center;gap:24px;min-height:68px}
.logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.logo-mark{
  width:34px;height:34px;border-radius:10px;display:grid;place-items:center;
  background:linear-gradient(140deg,var(--brand),#3B6CF0);color:#fff;font-weight:800;font-size:17px;
  box-shadow:0 6px 14px -8px rgba(29,78,216,.9)
}
.logo-text{font-size:19px;font-weight:800;color:var(--ink);letter-spacing:.4px}
.logo:hover .logo-text{color:var(--brand)}
.main-nav{display:none;gap:2px;margin-left:8px;flex:1 1 auto}
.nav-link{
  position:relative;display:inline-flex;align-items:center;height:68px;padding:0 14px;
  font-size:15px;font-weight:500;color:var(--ink-2);white-space:nowrap;
}
.nav-link::after{content:"";position:absolute;left:14px;right:14px;bottom:0;height:2px;background:var(--brand);transform:scaleX(0);transform-origin:left;transition:transform .24s ease}
.nav-link:hover{color:var(--brand)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--brand);font-weight:700}
.nav-link.is-active::after{transform:scaleX(1)}
.header-actions{display:flex;align-items:center;gap:10px;margin-left:auto}
.mega-wrap{position:relative;display:none}
.mega-trigger{
  display:inline-flex;align-items:center;gap:8px;height:42px;padding:0 16px;border-radius:var(--r-sm);
  border:1px solid var(--line);background:#fff;color:var(--ink);font-size:14px;font-weight:600;
  transition:border-color .2s ease,box-shadow .2s ease,color .2s ease;
}
.mega-trigger:hover{border-color:var(--brand);color:var(--brand);box-shadow:var(--sh1)}
.mega-trigger .caret{width:7px;height:7px;border-right:2px solid currentColor;border-bottom:2px solid currentColor;transform:rotate(45deg) translate(-2px,-2px);transition:transform .24s ease}
.mega-wrap.is-open .mega-trigger{border-color:var(--brand);color:var(--brand)}
.mega-wrap.is-open .caret{transform:rotate(225deg) translate(-1px,-1px)}
.mega-panel{
  position:absolute;right:0;top:calc(100% + 12px);width:720px;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-md);box-shadow:var(--sh3);padding:24px;display:grid;grid-template-columns:1fr 1fr 220px;gap:24px;
  opacity:0;visibility:hidden;transform:translateY(-6px);transition:opacity .2s ease,transform .2s ease,visibility .2s ease;
}
.mega-wrap.is-open .mega-panel{opacity:1;visibility:visible;transform:translateY(0)}
.mega-col h4{font-size:13px;font-weight:700;color:var(--ink-3);letter-spacing:.6px;margin-bottom:12px}
.mega-links li+li{margin-top:9px}
.mega-links a{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--ink-2);font-weight:500}
.mega-links a::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--brand);opacity:.5;flex:0 0 auto}
.mega-links a:hover{color:var(--brand)}
.mega-links a:hover::before{opacity:1}
.mega-news li+li{margin-top:12px;padding-top:12px;border-top:1px solid var(--line)}
.mega-news a{font-size:14px;color:var(--ink);font-weight:600;line-height:1.5;display:block}
.mega-news a:hover{color:var(--brand)}
.mega-news span{display:block;font-size:12px;color:var(--ink-3);font-variant-numeric:tabular-nums;margin-top:4px}
.mega-card{border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;background:#fff;display:flex;flex-direction:column}
.mega-card img{width:100%;aspect-ratio:16/10;object-fit:cover}
.mega-card-body{padding:14px}
.mega-card-body .tagline{font-size:12px;color:var(--accent);font-weight:700}
.mega-card-body p{font-size:13px;color:var(--ink-2);margin-top:6px;line-height:1.6}
.mega-card-body .go{display:inline-block;margin-top:10px;font-size:13px;font-weight:700;color:var(--brand)}
.nav-toggle{
  width:46px;height:46px;border-radius:12px;border:1px solid var(--line);background:#fff;
  display:grid;place-items:center;gap:4px;padding:12px;
}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--ink);border-radius:2px;transition:transform .24s ease,opacity .24s ease}
.nav-toggle.is-open span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle.is-open span:nth-child(2){opacity:0}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
@media(min-width:1024px){
  .main-nav{display:flex}
  .mega-wrap{display:block}
  .nav-toggle{display:none}
}
@media(max-width:1279px){
  .mega-panel{width:640px;grid-template-columns:1fr 1fr 190px}
}

/* 移动抽屉 */
.mobile-drawer{
  position:fixed;inset:68px 0 0;background:#fff;z-index:55;transform:translateY(-8px);
  opacity:0;visibility:hidden;transition:opacity .24s ease,transform .24s ease,visibility .24s ease;
  overflow-y:auto;padding:20px;
}
.mobile-drawer.is-open{opacity:1;visibility:visible;transform:translateY(0)}
.mobile-drawer a.m-link{display:flex;align-items:center;justify-content:space-between;min-height:56px;padding:0 4px;border-bottom:1px solid var(--line);font-size:16px;font-weight:600;color:var(--ink)}
.mobile-drawer a.m-link.is-active{color:var(--brand)}
.mobile-drawer a.m-link span{color:var(--ink-3);font-weight:400}
.mobile-drawer .m-cta{margin-top:20px;display:flex;gap:12px;flex-wrap:wrap}
@media(min-width:1024px){.mobile-drawer{display:none}}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:0 22px;border-radius:var(--r-sm);font-size:15px;font-weight:700;
  transition:background .2s ease,border-color .2s ease,color .2s ease,box-shadow .2s ease,transform .12s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 10px 20px -14px rgba(29,78,216,.95)}
.btn-primary:hover{background:var(--brand-hover);color:#fff;box-shadow:0 14px 26px -14px rgba(29,78,216,.95)}
.btn-primary:active{background:var(--brand-active);transform:translateY(1px)}
.btn-ghost{background:#fff;color:var(--brand);border:1px solid var(--line)}
.btn-ghost:hover{border-color:var(--brand);background:#fff;color:var(--brand-hover)}
.btn-ghost:active{transform:translateY(1px)}
.btn-text{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:700;color:var(--brand)}
.btn-text .arrow{transition:transform .24s ease}
.btn-text:hover .arrow{transform:translateX(4px)}

/* ---------- 徽章 / 标签 ---------- */
.badge{display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:var(--pill);font-size:13px;font-weight:600;line-height:1.6}
.badge-brand{background:var(--brand-soft);color:var(--brand)}
.badge-accent{background:var(--accent-soft);color:#C8440D}
.badge-teal{background:var(--teal-soft);color:#0A7568}
.badge-plain{background:#fff;color:var(--ink-2);border:1px solid var(--line)}

/* ---------- 面包屑 ---------- */
.breadcrumb{padding:18px 0 0;font-size:13px;color:var(--ink-3)}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumb li{display:flex;align-items:center;gap:8px}
.breadcrumb li+li::before{content:"/";color:var(--ink-3)}
.breadcrumb a{color:var(--ink-2)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb [aria-current]{color:var(--ink);font-weight:600}

/* ---------- Hero ---------- */
.hero{position:relative;padding:34px 0 var(--sec);overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1fr;gap:36px;align-items:center}
.hero-eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;color:var(--brand);background:var(--brand-soft);padding:6px 14px;border-radius:var(--pill)}
.hero h1{font-size:clamp(30px,5vw,50px);line-height:1.18;font-weight:800;margin-top:18px;letter-spacing:-.4px}
.hero h1 em{font-style:normal;color:var(--brand)}
.hero-lead{margin-top:18px;font-size:17px;color:var(--ink-2);max-width:560px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.hero-facts{display:flex;flex-wrap:wrap;gap:24px;margin-top:30px;padding-top:22px;border-top:1px solid var(--line)}
.hero-facts div{min-width:120px}
.hero-facts strong{display:block;font-size:24px;font-weight:800;color:var(--brand);font-variant-numeric:tabular-nums;line-height:1.2}
.hero-facts span{font-size:13px;color:var(--ink-3)}
.hero-figure{position:relative;border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh2);border:1px solid var(--line)}
.hero-figure img{width:100%;aspect-ratio:4/3;object-fit:cover}
.hero-float{
  position:absolute;left:18px;bottom:18px;background:#fff;border-radius:14px;padding:14px 16px;
  box-shadow:var(--sh2);border:1px solid var(--line);min-width:190px;
}
.hero-float b{display:block;font-size:22px;font-weight:800;color:var(--ink);font-variant-numeric:tabular-nums}
.hero-float span{font-size:12px;color:var(--ink-3)}
@media(min-width:1024px){
  .hero-grid{grid-template-columns:1.05fr .95fr;gap:56px}
  .hero{padding-top:48px}
}

/* ---------- 通用区块 ---------- */
.section{padding:var(--sec) 0}
.section-alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:40px}
.section-head .num{font-size:13px;font-weight:800;color:var(--accent);letter-spacing:2px;font-variant-numeric:tabular-nums}
.section-head h2{font-size:clamp(24px,3.2vw,34px);font-weight:800;line-height:1.3;margin-top:8px}
.section-head p{margin-top:10px;color:var(--ink-2);font-size:15px;max-width:620px}

/* ---------- 案例图文流 ---------- */
.case-block{
  display:grid;grid-template-columns:1fr;gap:28px;align-items:start;
  padding:32px;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--sh1);
  transition:transform .24s ease,box-shadow .24s ease;
}
.case-block+.case-block{margin-top:32px}
.case-block:hover{transform:translateY(-4px);box-shadow:var(--sh3)}
.case-media{position:relative;border-radius:var(--r-md);overflow:hidden;border:1px solid var(--line)}
.case-media img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .6s ease-out}
.case-block:hover .case-media img{transform:scale(1.03)}
.stat-float{
  position:absolute;top:14px;right:14px;background:#fff;border-radius:12px;padding:12px 14px;
  box-shadow:var(--sh2);border:1px solid var(--line);text-align:right;
}
.stat-float b{display:block;font-size:20px;font-weight:800;color:var(--brand);font-variant-numeric:tabular-nums;line-height:1.2}
.stat-float span{font-size:12px;color:var(--ink-3)}
.case-body h3{font-size:21px;font-weight:700;line-height:1.45}
.case-body .meta{margin-top:10px;display:flex;flex-wrap:wrap;gap:10px;align-items:center;font-size:13px;color:var(--ink-3);font-variant-numeric:tabular-nums}
.case-cols{display:grid;grid-template-columns:1fr;gap:20px;margin-top:18px}
.case-cols p{font-size:15px;color:var(--ink-2)}
.case-cols h4{font-size:14px;font-weight:700;color:var(--ink);margin-bottom:6px}
.case-list{margin-top:20px;display:grid;grid-template-columns:1fr;gap:10px}
.case-list li{position:relative;padding-left:18px;font-size:14px;color:var(--ink-2)}
.case-list li::before{content:"";position:absolute;left:0;top:9px;width:7px;height:7px;border-radius:2px;background:var(--brand);opacity:.75}
.case-foot{margin-top:22px;display:flex;flex-wrap:wrap;gap:16px;align-items:center;justify-content:space-between;padding-top:18px;border-top:1px solid var(--line)}
@media(min-width:900px){
  .case-block{grid-template-columns:1.02fr .98fr;gap:36px;padding:36px}
  .case-block.is-flip .case-media{order:2}
  .case-cols{grid-template-columns:1fr 1fr;gap:24px}
}

/* ---------- 数据条 ---------- */
.metrics{display:grid;grid-template-columns:repeat(2,1fr);gap:0;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh1)}
.metric{padding:26px 22px;text-align:center;border-right:1px solid var(--line);border-bottom:1px solid var(--line)}
.metric:nth-child(2n){border-right:0}
.metric strong{display:block;font-size:34px;font-weight:800;color:var(--brand);font-variant-numeric:tabular-nums;line-height:1.1}
.metric span{display:block;margin-top:8px;font-size:13px;color:var(--ink-3)}
@media(min-width:1024px){
  .metrics{grid-template-columns:repeat(4,1fr)}
  .metric{border-bottom:0;border-right:1px solid var(--line)}
  .metric:nth-child(2n){border-right:1px solid var(--line)}
  .metric:last-child{border-right:0}
}

/* ---------- 引述 ---------- */
.quote-card{background:#fff;border:1px solid var(--line);border-left:3px solid var(--accent);border-radius:var(--r-md);padding:26px;box-shadow:var(--sh1)}
.quote-card p{font-size:17px;line-height:1.8;color:var(--ink)}
.quote-card footer{margin-top:14px;font-size:13px;color:var(--ink-3)}

/* ---------- FAQ ---------- */
.faq-list{max-width:820px;margin:0 auto;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh1)}
.faq-list details{border-bottom:1px solid var(--line)}
.faq-list details:last-child{border-bottom:0}
.faq-list summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:60px;padding:16px 22px;font-size:16px;font-weight:600;color:var(--ink);
}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list summary::after{
  content:"";width:11px;height:11px;flex:0 0 auto;border-right:2px solid var(--brand);border-bottom:2px solid var(--brand);
  transform:rotate(45deg);transition:transform .24s ease;
}
.faq-list details[open] summary{color:var(--brand);border-left:3px solid var(--brand);padding-left:19px}
.faq-list details[open] summary::after{transform:rotate(225deg)}
.faq-list .answer{padding:0 22px 20px 22px;font-size:15px;line-height:1.8;color:var(--ink-2);max-width:760px}
.faq-list details[open] .answer{padding-left:22px}

/* ---------- 相关分类 ---------- */
.rel-grid{display:grid;grid-template-columns:1fr;gap:24px}
.rel-card{
  display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  overflow:hidden;box-shadow:var(--sh1);transition:transform .24s ease,box-shadow .24s ease,border-color .24s ease;
}
.rel-card:hover{transform:translateY(-4px);box-shadow:var(--sh3);border-color:#D6DEF5}
.rel-card img{width:100%;aspect-ratio:16/10;object-fit:cover}
.rel-card-body{padding:20px;display:flex;flex-direction:column;flex:1 1 auto}
.rel-card-body h3{font-size:18px;font-weight:700}
.rel-card-body p{margin-top:8px;font-size:14px;color:var(--ink-2);flex:1 1 auto}
.rel-card-body .btn-text{margin-top:14px}
@media(min-width:768px){.rel-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.rel-grid{grid-template-columns:repeat(3,1fr)}}

/* ---------- CTA 条 ---------- */
.cta-band{
  background:var(--brand-soft);border-radius:var(--r-lg);padding:32px;
  display:flex;flex-wrap:wrap;gap:24px;align-items:center;justify-content:space-between;
}
.cta-band h2{font-size:clamp(22px,2.6vw,28px);font-weight:800;line-height:1.35}
.cta-band p{margin-top:10px;color:var(--ink-2);font-size:15px;max-width:560px}
.cta-band .cta-actions{display:flex;flex-wrap:wrap;gap:12px}
@media(min-width:768px){.cta-band{padding:44px}}

/* ---------- 表单 ---------- */
.form-grid{display:grid;grid-template-columns:1fr;gap:18px;margin-top:24px}
.field label{display:block;font-size:13px;color:var(--ink-2);margin-bottom:6px;font-weight:600}
.field input,.field select,.field textarea{
  width:100%;min-height:46px;padding:11px 14px;border-radius:var(--r-sm);border:1px solid var(--line);
  background:#fff;font-size:15px;color:var(--ink);font-family:inherit;transition:border-color .2s ease,box-shadow .2s ease;
}
.field textarea{min-height:110px;resize:vertical;line-height:1.7}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(29,78,216,.16)}
.field .hint{font-size:12px;color:var(--ink-3);margin-top:6px}
@media(min-width:768px){.form-grid{grid-template-columns:1fr 1fr}.field.full{grid-column:1/-1}}

/* ---------- 页脚 ---------- */
.site-footer{background:#fff;border-top:1px solid var(--line);margin-top:var(--sec);padding:56px 0 28px}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px}
.footer-brand p{margin-top:16px;font-size:14px;color:var(--ink-2);max-width:320px}
.footer-col h3{font-size:15px;font-weight:700;margin-bottom:16px}
.footer-col li+li{margin-top:10px}
.footer-col a{font-size:14px;color:var(--ink-2)}
.footer-col a:hover{color:var(--brand)}
.contact-line{font-size:14px;color:var(--ink-2)}
.footer-bottom{
  margin-top:40px;padding-top:20px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;font-size:13px;color:var(--ink-3);
}
@media(min-width:768px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px}}

/* ---------- 浮动 CTA / 返回顶部 ---------- */
.float-cta{
  position:fixed;right:24px;bottom:24px;width:220px;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-md);box-shadow:var(--sh3);padding:16px;z-index:50;
  opacity:0;visibility:hidden;transform:translateY(10px);transition:opacity .24s ease,transform .24s ease,visibility .24s ease;
}
.float-cta.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.float-cta p{font-size:13px;color:var(--ink-2);margin-bottom:12px;line-height:1.6}
.float-cta .btn{width:100%;min-height:42px;font-size:14px}
.to-top{
  position:fixed;right:24px;bottom:150px;width:44px;height:44px;border-radius:12px;background:#fff;
  border:1px solid var(--line);box-shadow:var(--sh1);display:grid;place-items:center;z-index:50;
  opacity:0;visibility:hidden;transition:opacity .24s ease,visibility .24s ease,transform .24s ease;
}
.to-top.is-visible{opacity:1;visibility:visible}
.to-top::before{content:"";width:10px;height:10px;border-left:2px solid var(--brand);border-top:2px solid var(--brand);transform:rotate(45deg) translate(1px,1px)}
.to-top:hover{transform:translateY(-2px);box-shadow:var(--sh2)}
@media(max-width:767px){
  .to-top{display:none}
  .float-cta{
    right:0;left:0;bottom:0;width:100%;border-radius:0;border-left:0;border-right:0;border-bottom:0;
    padding:10px 16px;display:flex;align-items:center;gap:12px;transform:translateY(0);
  }
  .float-cta p{margin:0;flex:1 1 auto;font-size:13px}
  .float-cta .btn{width:auto;flex:0 0 auto;padding:0 18px}
  body{padding-bottom:72px}
}