/* roulang page: index */
:root{
  --brand:#1E5AE8;
  --brand-deep:#123A9E;
  --brand-soft:#E8EFFF;
  --ink:#0A1220;
  --ink-2:#0D1728;
  --cyan:#19D3F0;
  --green:#0FB57A;
  --orange:#FF7A2F;
  --bg:#F6F8FC;
  --card:#FFFFFF;
  --line:#E4EAF2;
  --text:#1A2433;
  --muted:#5A6B82;
  --dark-text:#E6EEF9;
  --dark-muted:#93A5BE;
  --radius-card:16px;
  --radius-btn:12px;
  --shadow-card:0 6px 20px rgba(16,38,80,.06);
  --shadow-hover:0 14px 36px rgba(16,38,80,.12);
  --shadow-dark:0 12px 32px rgba(10,18,32,.35);
  --gutter:24px;
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;scroll-padding-top:88px;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC","Inter",system-ui,sans-serif;
  font-size:16px;
  line-height:1.85;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto;}
a{color:inherit;text-decoration:none;transition:color .2s ease-out,opacity .2s ease-out;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding:0;list-style:none;}
:focus-visible{outline:none;box-shadow:0 0 0 4px rgba(30,90,232,.25);border-radius:8px;}

.container-x{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:20px;
  padding-right:20px;
}
@media (min-width:768px){
  .container-x{padding-left:32px;padding-right:32px;}
}

/* ============ 导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:50;
  background:rgba(10,18,32,.96);
  backdrop-filter:saturate(120%) blur(6px);
}
.neon-divider{
  height:1px;
  width:100%;
  background:linear-gradient(90deg,rgba(25,211,240,0) 0%,rgba(25,211,240,.85) 50%,rgba(25,211,240,0) 100%);
}
.brand-mark{
  width:40px;height:40px;border-radius:12px;
  background:linear-gradient(140deg,var(--brand) 0%,var(--brand-deep) 100%);
  border:1px solid rgba(25,211,240,.5);
  display:flex;align-items:center;justify-content:center;
  font-weight:800;font-size:15px;letter-spacing:.04em;color:#fff;
  box-shadow:0 0 18px rgba(25,211,240,.28);
  flex:none;
}
.brand-title{color:#F2F7FF;font-weight:700;font-size:16px;line-height:1.2;letter-spacing:.02em;}
.brand-sub{color:var(--dark-muted);font-size:11.5px;letter-spacing:.14em;text-transform:uppercase;line-height:1.4;}
.nav-link{
  position:relative;
  display:inline-flex;align-items:center;
  height:72px;
  padding:0 4px;
  font-size:15px;
  color:#B9C7DC;
  white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:20px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--cyan),#5CE7FF);
  transform:scaleX(0);transform-origin:left;transition:transform .22s ease-out;
  opacity:.6;
}
.nav-link:hover{color:var(--dark-text);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.active{color:#FFFFFF;text-shadow:0 0 14px rgba(25,211,240,.65);}
.nav-link.active::after{transform:scaleX(1);opacity:1;}
.btn-nav-cta{
  display:inline-flex;align-items:center;gap:8px;
  height:42px;padding:0 20px;border-radius:12px;
  background:#C8F4FB;color:#06283A;font-weight:700;font-size:14.5px;
  border:1px solid rgba(25,211,240,.6);
  transition:all .2s ease-out;
}
.btn-nav-cta:hover{background:#E4FBFF;box-shadow:0 0 22px rgba(25,211,240,.55);transform:translateY(-1px);}
.burger{
  width:44px;height:44px;border-radius:12px;
  border:1px solid rgba(25,211,240,.35);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;
}
.burger span{display:block;width:18px;height:2px;background:#C8F4FB;border-radius:2px;transition:.2s ease-out;}
.burger:hover{background:rgba(25,211,240,.12);}

.drawer{
  position:fixed;inset:0;z-index:60;pointer-events:none;
}
.drawer-overlay{
  position:absolute;inset:0;background:rgba(6,12,22,.6);opacity:0;transition:opacity .28s ease-out;
}
.drawer-panel{
  position:absolute;top:0;right:0;bottom:0;width:80vw;max-width:340px;
  background:var(--ink-2);border-left:1px solid rgba(25,211,240,.35);
  transform:translateX(100%);transition:transform .3s ease-out;
  display:flex;flex-direction:column;
  padding:20px 0 0;
}
.drawer.open{pointer-events:auto;}
.drawer.open .drawer-overlay{opacity:1;}
.drawer.open .drawer-panel{transform:translateX(0);}
.drawer-link{
  display:flex;align-items:center;height:52px;padding:0 24px;
  color:#B9C7DC;font-size:15.5px;border-left:3px solid transparent;
}
.drawer-link:hover{color:#fff;background:rgba(25,211,240,.07);}
.drawer-link.active{color:#fff;border-left-color:var(--cyan);background:rgba(25,211,240,.1);}
.drawer-foot{margin-top:auto;padding:20px 24px 28px;border-top:1px solid rgba(255,255,255,.08);}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--radius-btn);
  font-weight:700;font-size:15.5px;
  padding:14px 26px;
  transition:all .2s ease-out;
  border:1px solid transparent;
  cursor:pointer;
}
.btn:active{transform:translateY(1px);}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 10px 24px rgba(30,90,232,.24);}
.btn-primary:hover{background:#1A4FD0;box-shadow:0 14px 30px rgba(30,90,232,.32);transform:translateY(-2px) scale(1.02);}
.btn-outline{background:#fff;color:var(--brand);border-color:#BFD2F7;}
.btn-outline:hover{border-color:var(--brand);box-shadow:0 12px 26px rgba(16,38,80,.1);transform:translateY(-2px) scale(1.02);}
.btn-dark{background:#C8F4FB;color:#06283A;border-color:rgba(25,211,240,.5);}
.btn-dark:hover{background:#E4FBFF;box-shadow:0 0 24px rgba(25,211,240,.5);transform:translateY(-2px) scale(1.02);}
.btn-text{display:inline-flex;align-items:center;gap:6px;color:var(--brand);font-weight:600;font-size:15px;}
.btn-text:hover{gap:11px;color:var(--brand-deep);}
.btn-sm{padding:10px 18px;font-size:14px;border-radius:10px;}

/* ============ 通用视觉 ============ */
.section{padding-top:64px;padding-bottom:64px;}
@media (min-width:768px){.section{padding-top:96px;padding-bottom:96px;}}
.section-label{
  display:inline-flex;align-items:center;gap:10px;
  font-size:12.5px;font-weight:600;letter-spacing:.16em;text-transform:uppercase;
  color:var(--brand);margin-bottom:14px;
}
.section-label::before{content:"";display:block;width:22px;height:2px;background:var(--cyan);border-radius:2px;}
.h2{font-size:22px;line-height:1.32;font-weight:700;letter-spacing:-.01em;color:var(--text);}
@media (min-width:768px){.h2{font-size:30px;}}
@media (min-width:1024px){.h2{font-size:34px;}}
.lead{color:var(--muted);font-size:15.5px;line-height:1.9;}

.card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);
  transition:transform .24s ease-out,box-shadow .24s ease-out,border-color .24s ease-out;
}
.card-hover:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:#CFDCF2;}

.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:999px;
  font-size:12.5px;font-weight:600;line-height:1.7;
}
.badge-soft{background:var(--brand-soft);color:var(--brand-deep);}
.badge-green{background:rgba(15,181,122,.12);color:#0A7C55;}
.badge-orange{background:rgba(255,122,47,.14);color:#B44F14;}
.badge-dark{background:rgba(25,211,240,.14);color:#7BE9FB;border:1px solid rgba(25,211,240,.4);}

.tag-chip{
  display:inline-flex;align-items:center;
  padding:7px 15px;border-radius:999px;
  background:#fff;border:1px solid var(--line);
  font-size:13.5px;color:var(--muted);
  transition:all .2s ease-out;
}
.tag-chip:hover{border-color:var(--brand);color:var(--brand);}
.tag-chip.on{background:var(--brand);border-color:var(--brand);color:#fff;}

.dark-band{background:var(--ink);color:var(--dark-text);position:relative;overflow:hidden;}
.dark-band::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(25,211,240,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(25,211,240,.06) 1px,transparent 1px);
  background-size:56px 56px;
  pointer-events:none;
}
.stat-num{
  font-size:30px;font-weight:800;letter-spacing:-.02em;line-height:1.15;
  color:var(--cyan);text-shadow:0 0 20px rgba(25,211,240,.4);
}
@media (min-width:768px){.stat-num{font-size:36px;}}

.num-badge{
  width:52px;height:52px;flex:none;border-radius:14px;
  display:flex;align-items:center;justify-content:center;
  background:var(--brand-soft);color:var(--brand-deep);
  font-weight:800;font-size:18px;letter-spacing:.02em;
}

.hero-frame{
  position:relative;border-radius:20px;overflow:hidden;
  border:1px solid #D7E2F5;
  box-shadow:0 20px 48px rgba(16,38,80,.14);
  background:linear-gradient(135deg,#E8EFFF 0%,#F6F8FC 100%);
}
.hero-frame img{width:100%;height:100%;object-fit:cover;aspect-ratio:16/11;}
.hero-corner{
  position:absolute;top:14px;right:14px;
  display:inline-flex;align-items:center;gap:7px;
  padding:7px 14px;border-radius:999px;
  background:rgba(10,18,32,.85);
  border:1px solid rgba(25,211,240,.55);
  color:#B9F1FC;font-size:12.5px;font-weight:600;
  box-shadow:0 0 18px rgba(25,211,240,.35);
}

.step-line{
  position:absolute;top:26px;left:12%;right:12%;height:2px;
  background:linear-gradient(90deg,rgba(25,211,240,.15),rgba(30,90,232,.45),rgba(25,211,240,.15));
  z-index:0;
}
.step-dot{
  width:54px;height:54px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:#fff;border:2px solid var(--brand);
  color:var(--brand);font-weight:800;font-size:17px;
  position:relative;z-index:1;
  box-shadow:0 0 0 6px rgba(30,90,232,.08);
}

.review-avatar{
  width:46px;height:46px;border-radius:50%;
  object-fit:cover;border:2px solid #fff;box-shadow:0 4px 12px rgba(16,38,80,.12);
}

.price-card{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-card);transition:transform .24s ease-out,box-shadow .24s ease-out;}
.price-card.featured{
  border:1px solid rgba(25,211,240,.75);
  box-shadow:0 18px 44px rgba(30,90,232,.18),0 0 0 1px rgba(25,211,240,.35) inset;
  transform:translateY(-8px) scale(1.015);
}
.price-num{font-size:34px;font-weight:800;letter-spacing:-.02em;color:var(--text);line-height:1.1;}
.price-num small{font-size:14px;font-weight:600;color:var(--muted);margin-left:4px;letter-spacing:0;}
.price-line{display:flex;align-items:flex-start;gap:10px;font-size:14.8px;color:var(--muted);line-height:1.85;}
.price-line::before{
  content:"";flex:none;width:18px;height:18px;border-radius:50%;margin-top:5px;
  background:var(--brand-soft);
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%231E5AE8' stroke-width='3.4' stroke-linecap='round' stroke-linejoin='round'><polyline points='20 6 9 17 4 12'/></svg>");
  background-size:11px 11px;background-position:center;background-repeat:no-repeat;
}

/* ============ 资讯卡片 ============ */
.news-card{
  display:flex;flex-direction:column;overflow:hidden;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);
  position:relative;
  transition:transform .24s ease-out,box-shadow .24s ease-out;
}
.news-card::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:2px;background:var(--cyan);
  transform:scaleY(0);transform-origin:top;transition:transform .26s ease-out;
}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);}
.news-card:hover::before{transform:scaleY(1);}
.news-card:hover .news-title{color:var(--brand);}
.news-thumb{width:100%;aspect-ratio:4/3;object-fit:cover;background:linear-gradient(135deg,#E8EFFF,#F6F8FC);}
.line-clamp-2{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.line-clamp-3{display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;}

/* ============ FAQ ============ */
.faq-shell{background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-card);overflow:hidden;}
.faq-item + .faq-item{border-top:1px solid var(--line);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:22px 24px;text-align:left;
  font-size:16.5px;font-weight:600;color:var(--text);
  transition:color .2s ease-out;
}
.faq-q:hover{color:var(--brand);}
.faq-icon{
  flex:none;width:28px;height:28px;border-radius:50%;
  border:1px solid var(--line);position:relative;
  transition:transform .28s ease-out,border-color .28s ease-out,background .28s ease-out;
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--brand);border-radius:2px;
  left:50%;top:50%;transform:translate(-50%,-50%);
}
.faq-icon::before{width:12px;height:2px;}
.faq-icon::after{width:2px;height:12px;transition:opacity .2s ease-out;}
.faq-item.open .faq-icon{transform:rotate(180deg);background:var(--brand-soft);border-color:#BFD2F7;}
.faq-item.open .faq-icon::after{opacity:0;}
.faq-a{max-height:0;overflow:hidden;transition:max-height .34s ease-out;}
.faq-a p{padding:0 24px 24px;font-size:15px;line-height:1.9;color:var(--muted);}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink);color:var(--dark-muted);}
.footer-title{
  font-size:13px;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:#D7E4F5;
  display:flex;align-items:center;gap:9px;margin-bottom:18px;
}
.footer-title::before{content:"";width:16px;height:2px;background:var(--cyan);border-radius:2px;}
.footer-link{display:block;font-size:14.5px;color:#93A5BE;padding:6px 0;transition:color .2s ease-out;}
.footer-link:hover{color:var(--cyan);}
.footer-bottom{border-top:1px solid rgba(255,255,255,.09);}

/* ============ 浮动 CTA ============ */
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:45;
  display:flex;align-items:center;gap:16px;
  padding:12px 18px 12px 22px;border-radius:999px;
  background:rgba(10,18,32,.95);
  border:1px solid rgba(25,211,240,.45);
  box-shadow:var(--shadow-dark);
  opacity:0;transform:translateY(18px);pointer-events:none;
  transition:opacity .3s ease-out,transform .3s ease-out;
}
.float-cta.show{opacity:1;transform:translateY(0);pointer-events:auto;}
.float-cta .hint{color:#D7E4F5;font-size:14px;font-weight:600;white-space:nowrap;}
.float-cta .link-quiet{color:var(--cyan);font-size:14px;font-weight:600;white-space:nowrap;}
.float-cta .link-quiet:hover{color:#8CEEFF;}

/* ============ 动效 ============ */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease-out,transform .6s ease-out;}
.reveal.is-visible{opacity:1;transform:none;}

/* ============ 响应式 ============ */
@media (max-width:1023px){
  .nav-desktop{display:none;}
}
@media (min-width:1024px){
  .nav-mobile-trigger{display:none;}
}
@media (max-width:767px){
  body{padding-bottom:76px;}
  .float-cta{
    left:0;right:0;bottom:0;border-radius:0;
    padding:10px 14px;justify-content:space-between;gap:10px;
    border-left:0;border-right:0;border-bottom:0;
  }
  .float-cta .hint{display:none;}
  .float-cta .btn{padding:10px 16px;font-size:14px;}
  .section{padding-top:56px;padding-bottom:56px;}
  .price-card.featured{transform:none;}
  .hero-frame img{aspect-ratio:16/10;}
}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none;}
  html{scroll-behavior:auto;}
}

/* roulang page: article */
:root{
  --beacon:#1E5AE8;
  --beacon-deep:#123A9E;
  --beacon-soft:#E8EFFF;
  --ink:#0A1220;
  --ink-2:#0D1728;
  --cyan:#19D3F0;
  --green:#0FB57A;
  --orange:#FF7A2F;
  --bg:#F6F8FC;
  --card:#FFFFFF;
  --line:#E4EAF2;
  --text:#1A2433;
  --muted:#5A6B82;
  --on-dark:#E6EEF9;
  --on-dark-muted:#93A5BE;
  --r-card:16px;
  --r-btn:12px;
  --shadow-sm:0 6px 20px rgba(16,38,80,.06);
  --shadow-md:0 14px 36px rgba(16,38,80,.12);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  background:var(--bg);
  color:var(--text);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit}
input,textarea{font:inherit}
:focus-visible{outline:none;box-shadow:0 0 0 4px rgba(30,90,232,.25);border-radius:8px}
.container-x{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media (min-width:1024px){.container-x{padding:0 32px}}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:50;background:var(--ink)}
.neon-divider{height:1px;background:linear-gradient(90deg,transparent,var(--cyan),transparent)}
.brand-mark{
  width:40px;height:40px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  font-weight:800;font-size:15px;letter-spacing:.02em;color:#04121C;flex:0 0 auto;
  background:linear-gradient(135deg,var(--cyan),#7FE9FF);
  box-shadow:0 0 0 1px rgba(25,211,240,.5),0 0 18px rgba(25,211,240,.25);
}
.brand-title{color:#fff;font-size:15px;font-weight:700;line-height:1.25}
.brand-sub{color:var(--on-dark-muted);font-size:11px;letter-spacing:.14em;line-height:1.25;text-transform:uppercase}
.nav-desktop{display:flex}
.nav-link{position:relative;color:var(--on-dark-muted);font-size:15px;padding:6px 0;transition:color .2s ease}
.nav-link::after{content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;background:var(--cyan);opacity:0;transition:opacity .2s ease;border-radius:2px}
.nav-link:hover{color:var(--on-dark)}
.nav-link:hover::after{opacity:.6}
.nav-link.active{color:#fff;text-shadow:0 0 12px rgba(25,211,240,.55)}
.nav-link.active::after{opacity:1}
.btn-nav-cta{
  background:#CDF6FF;color:#062230;font-weight:700;font-size:14.5px;padding:9px 18px;border-radius:12px;
  transition:transform .2s ease-out,box-shadow .2s ease-out,background .2s ease-out;display:inline-block;
}
.btn-nav-cta:hover{box-shadow:0 0 18px rgba(25,211,240,.45);transform:translateY(-1px)}
.btn-nav-cta:active{transform:translateY(0)}
.burger{
  display:none;width:42px;height:42px;flex-direction:column;gap:5px;align-items:center;justify-content:center;
  border-radius:12px;border:1px solid rgba(255,255,255,.14);
}
.burger span{width:18px;height:2px;background:var(--on-dark);border-radius:2px;transition:.2s ease}
.burger:hover{border-color:rgba(25,211,240,.6)}
@media (max-width:1023px){
  header .nav-desktop{display:none}
  .burger{display:flex}
  header a.btn-nav-cta{display:none}
}

/* ---------- drawer ---------- */
.drawer-mask{position:fixed;inset:0;background:rgba(4,10,20,.62);opacity:0;pointer-events:none;transition:opacity .26s ease;z-index:55}
.drawer-mask.is-open{opacity:1;pointer-events:auto}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:80vw;max-width:340px;z-index:60;
  background:var(--ink-2);padding:20px;display:flex;flex-direction:column;
  transform:translateX(102%);transition:transform .28s ease-out;overflow-y:auto;
  border-left:1px solid rgba(25,211,240,.25);
}
.drawer.is-open{transform:none}
.drawer-close{width:36px;height:36px;border-radius:10px;border:1px solid rgba(255,255,255,.14);color:var(--on-dark);display:flex;align-items:center;justify-content:center;font-size:20px;line-height:1}
.drawer-link{
  display:block;line-height:52px;font-size:16px;color:var(--on-dark);padding-left:12px;
  border-bottom:1px solid rgba(255,255,255,.07);border-left:3px solid transparent;transition:.2s ease;
}
.drawer-link:hover,.drawer-link.active{color:#fff;border-left-color:var(--cyan);background:rgba(25,211,240,.07)}

/* ---------- article hero ---------- */
.article-hero{
  background:linear-gradient(180deg,#FFFFFF 0%,#F1F6FE 100%);
  border-bottom:1px solid var(--line);
  padding:26px 0 42px;
}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--muted);margin-bottom:22px}
.crumbs a{color:var(--muted);transition:color .2s ease}
.crumbs a:hover{color:var(--beacon)}
.crumbs .sep{color:#C3CEE0}
.crumbs .current{color:var(--text);font-weight:600;max-width:560px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.badge-cat{display:inline-block;background:var(--beacon-soft);color:var(--beacon-deep);font-size:13px;font-weight:600;padding:4px 13px;border-radius:999px;margin-bottom:16px}
.article-title{
  font-size:clamp(27px,3.6vw,42px);line-height:1.25;font-weight:700;letter-spacing:-.01em;
  margin:0 0 20px;max-width:940px;color:#101A2B;
}
.meta-row{display:flex;flex-wrap:wrap;gap:10px 24px;font-size:13.5px;color:var(--muted)}
.meta-row span{display:inline-flex;align-items:center;gap:7px}
.meta-dot{width:5px;height:5px;border-radius:50%;background:var(--cyan);flex:0 0 auto}
.meta-verified{color:var(--green);font-weight:600}

/* ---------- article body ---------- */
.article-main{padding:48px 0 8px}
.prose-wrap{max-width:820px;margin:0 auto}
.article-prose{font-size:16.5px;line-height:1.95;color:#22304A}
.article-prose>p:first-of-type{font-size:17.5px;color:#1A2433}
.article-prose p{margin:0 0 1.2em}
.article-prose h2{
  font-size:26px;line-height:1.45;font-weight:700;color:#101A2B;
  margin:2em 0 .8em;padding-left:14px;border-left:4px solid var(--beacon);
}
.article-prose h3{font-size:20px;line-height:1.5;font-weight:700;color:#101A2B;margin:1.7em 0 .7em}
.article-prose h4{font-size:17px;font-weight:700;margin:1.4em 0 .6em}
.article-prose ul,.article-prose ol{padding-left:1.35em;margin:0 0 1.4em}
.article-prose li{margin-bottom:.5em}
.article-prose blockquote{
  margin:0 0 1.4em;padding:16px 22px;background:var(--beacon-soft);
  border-left:3px solid var(--beacon);border-radius:0 12px 12px 0;color:#22304A;
}
.article-prose blockquote p:last-child{margin-bottom:0}
.article-prose img{border-radius:12px;margin:1.6em auto;height:auto}
.article-prose figure{margin:1.6em 0}
.article-prose figcaption{font-size:13px;color:var(--muted);text-align:center;margin-top:10px}
.article-prose a{color:var(--beacon);text-decoration:underline;text-underline-offset:3px}
.article-prose a:hover{color:var(--beacon-deep)}
.article-prose strong{font-weight:700;color:#101A2B}
.article-prose hr{border:0;border-top:1px solid var(--line);margin:2.2em 0}
.article-prose code{background:#F1F5FB;padding:2px 6px;border-radius:6px;font-size:.92em;color:#123A9E}
.article-prose pre{background:var(--ink);color:var(--on-dark);padding:18px 20px;border-radius:14px;overflow-x:auto;margin:0 0 1.5em}
.article-prose pre code{background:none;color:inherit;padding:0}
.article-prose table{
  width:100%;border-collapse:separate;border-spacing:0;margin:1.6em 0;font-size:15px;
  border:1px solid var(--line);border-radius:14px;overflow:hidden;background:#fff;
}
.article-prose th{background:var(--beacon-soft);color:var(--beacon-deep);text-align:left;font-weight:600}
.article-prose th,.article-prose td{padding:12px 16px;border-bottom:1px solid var(--line)}
.article-prose tbody tr:nth-child(even){background:#FAFCFF}
.article-prose tbody tr:last-child td{border-bottom:0}
@media (max-width:640px){
  .article-prose{font-size:16px;line-height:1.9}
  .article-prose h2{font-size:22px}
  .article-prose h3{font-size:18px}
  .article-prose table{display:block;overflow-x:auto;white-space:nowrap}
}

.empty-state{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--shadow-sm);
  padding:44px 24px;text-align:center;
}
.empty-icon{
  width:56px;height:56px;border-radius:16px;margin:0 auto 18px;display:flex;align-items:center;justify-content:center;
  background:var(--beacon-soft);color:var(--beacon-deep);font-weight:800;font-size:18px;
}
.empty-state h2{font-size:22px;margin:0 0 10px;color:#101A2B}
.empty-state p{color:var(--muted);font-size:15px;margin:0 0 22px}

/* ---------- tags ---------- */
.tag-row{
  max-width:820px;margin:44px auto 0;padding-top:24px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
}
.tag-title{font-size:12.5px;font-weight:600;letter-spacing:.08em;color:var(--muted)}
.tag{
  display:inline-block;background:#fff;border:1px solid var(--line);color:#33415C;font-size:13.5px;
  padding:5px 14px;border-radius:999px;transition:.2s ease-out;
}
.tag:hover{border-color:var(--beacon);color:var(--beacon);box-shadow:var(--shadow-sm);transform:translateY(-1px)}

/* ---------- generic sections & cards ---------- */
.section{padding:64px 0}
@media (min-width:1024px){.section{padding:88px 0}}
.section-white{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{margin-bottom:36px;max-width:720px}
.kicker{display:flex;align-items:center;gap:10px;font-size:12.5px;font-weight:600;letter-spacing:.14em;color:var(--beacon);text-transform:uppercase;margin-bottom:12px}
.kicker::before{content:"";width:22px;height:2px;background:var(--cyan);border-radius:2px}
.section-title{font-size:clamp(22px,2.6vw,32px);line-height:1.35;font-weight:700;margin:0 0 12px;color:#101A2B}
.section-sub{color:var(--muted);font-size:15.5px;margin:0;line-height:1.85}
.grid-3{display:grid;gap:24px;grid-template-columns:1fr}
@media (min-width:640px){.grid-3{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.grid-3{grid-template-columns:repeat(3,1fr)}}
.card{
  display:block;background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--shadow-sm);transition:transform .25s ease-out,box-shadow .25s ease-out,border-color .25s ease-out;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#D5E0F2}
.card-media{aspect-ratio:16/9;overflow:hidden;background:linear-gradient(135deg,#E8EFFF,#D7E6FF)}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease-out}
.card:hover .card-media img{transform:scale(1.04)}
.card-body{padding:20px 22px 24px}
.card-title{font-size:17px;font-weight:700;line-height:1.55;margin:0 0 8px;color:#101A2B;transition:color .2s ease}
.card:hover .card-title{color:var(--beacon)}
.card-text{
  font-size:14px;color:var(--muted);line-height:1.8;margin:0 0 14px;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.card-meta{font-size:13px;color:#8C9AB0;display:flex;gap:12px;align-items:center}

/* ---------- buttons ---------- */
.btn-primary,.btn-ghost,.btn-dark,.btn-text{display:inline-flex;align-items:center;gap:8px;border-radius:12px;font-size:15px;font-weight:600;transition:.2s ease-out}
.btn-primary{background:var(--beacon);color:#fff;padding:13px 25px}
.btn-primary:hover{background:var(--beacon-deep);transform:translateY(-2px) scale(1.02);box-shadow:var(--shadow-md)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:#fff;color:var(--beacon);border:1px solid rgba(30,90,232,.45);padding:12px 24px}
.btn-ghost:hover{border-color:var(--beacon);background:#F4F8FF;transform:translateY(-2px);box-shadow:var(--shadow-sm)}
.btn-dark{background:#CDF6FF;color:#062230;padding:13px 25px}
.btn-dark:hover{box-shadow:0 0 20px rgba(25,211,240,.5);transform:translateY(-2px)}
.btn-text{color:var(--beacon);padding:6px 0;font-size:14.5px}
.btn-text::after{content:"→";transition:transform .2s ease}
.btn-text:hover::after{transform:translateX(4px)}
.btn-row{display:flex;flex-wrap:wrap;gap:14px;align-items:center}

/* ---------- CTA banner ---------- */
.cta-wrap{padding:16px 0 72px}
.cta-banner{position:relative;overflow:hidden;background:var(--ink);border-radius:22px;padding:46px 32px}
.cta-banner::before{
  content:"";position:absolute;inset:0;
  background:repeating-linear-gradient(115deg,rgba(25,211,240,.10) 0 2px,transparent 2px 18px);
}
.cta-banner::after{
  content:"";position:absolute;right:-80px;top:-80px;width:280px;height:280px;border-radius:50%;
  background:radial-gradient(circle,rgba(25,211,240,.28),transparent 68%);
}
.cta-inner{position:relative;z-index:1;display:flex;flex-direction:column;gap:26px}
@media (min-width:900px){.cta-inner{flex-direction:row;align-items:center;justify-content:space-between}}
.cta-title{font-size:clamp(21px,2.4vw,30px);font-weight:700;color:#fff;margin:0 0 10px;line-height:1.4}
.cta-sub{color:var(--on-dark-muted);font-size:15px;margin:0;max-width:560px}
@media (min-width:1024px){.cta-banner{padding:56px 48px}}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:var(--on-dark)}
.footer-title{position:relative;color:var(--on-dark);font-size:13px;font-weight:600;letter-spacing:.12em;margin:0 0 16px;padding-bottom:10px}
.footer-title::after{content:"";position:absolute;left:0;bottom:0;width:28px;height:2px;background:var(--cyan);border-radius:2px}
.footer-link{display:block;color:var(--on-dark-muted);font-size:14.5px;line-height:2.1;transition:color .2s ease}
.footer-link:hover{color:var(--cyan)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);border-bottom:1px solid rgba(255,255,255,.08)}

/* ---------- floating CTA ---------- */
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:45;display:flex;align-items:center;gap:16px;
  padding:10px 14px 10px 20px;background:rgba(10,18,32,.96);border:1px solid rgba(25,211,240,.42);
  border-radius:999px;box-shadow:0 14px 36px rgba(6,20,45,.35);
  opacity:0;transform:translateY(14px);pointer-events:none;transition:opacity .3s ease-out,transform .3s ease-out;
}
.float-cta.is-visible{opacity:1;transform:none;pointer-events:auto}
.float-cta-btn{background:#CDF6FF;color:#062230;font-weight:700;font-size:14px;padding:9px 18px;border-radius:999px;transition:.2s ease-out}
.float-cta-btn:hover{box-shadow:0 0 18px rgba(25,211,240,.5)}
.float-cta-link{color:var(--on-dark-muted);font-size:13.5px;transition:color .2s ease}
.float-cta-link:hover{color:var(--cyan)}
@media (max-width:640px){
  body{padding-bottom:74px}
  .float-cta{
    left:0;right:0;bottom:0;border-radius:0;padding:11px 14px;justify-content:space-between;gap:10px;
    border-left:0;border-right:0;border-bottom:0;
  }
  .float-cta-btn{flex:1;text-align:center}
}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease-out,transform .6s ease-out}
.reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
}
section[id],div[id]{scroll-margin-top:88px}

/* roulang page: category1 */
:root{
  --blue:#1E5AE8;
  --blue-d:#123A9E;
  --blue-l:#E8EFFF;
  --ink:#0A1220;
  --ink-2:#0D1728;
  --cyan:#19D3F0;
  --green:#0FB57A;
  --orange:#FF7A2F;
  --bg:#F6F8FC;
  --card:#FFFFFF;
  --line:#E4EAF2;
  --text:#1A2433;
  --muted:#5A6B82;
  --ink-text:#E6EEF9;
  --ink-muted:#93A5BE;
  --r-card:16px;
  --r-btn:12px;
  --shadow:0 6px 20px rgba(16,38,80,.06);
  --shadow-hover:0 14px 36px rgba(16,38,80,.12);
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font:inherit;cursor:pointer;border:0;background:none;}
h1,h2,h3,h4,p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
section[id],div[id]{scroll-margin-top:96px;}
:focus-visible{outline:4px solid rgba(30,90,232,.25);outline-offset:2px;border-radius:6px;}

/* 容器 */
.container-x{max-width:1200px;margin:0 auto;padding:0 20px;}
@media (min-width:768px){.container-x{padding:0 32px;}}

/* 顶部导航 */
.site-header{
  position:sticky;top:0;z-index:50;
  background:var(--ink);
  box-shadow:0 8px 30px rgba(4,12,28,.28);
}
.brand-mark{
  width:42px;height:42px;flex:none;
  display:flex;align-items:center;justify-content:center;
  border-radius:12px;
  background:linear-gradient(135deg,var(--blue) 0%,#2C7BF2 100%);
  color:#fff;font-weight:800;font-size:15px;letter-spacing:.06em;
  box-shadow:0 0 0 1px rgba(25,211,240,.45),0 6px 18px rgba(30,90,232,.35);
}
.brand-title{color:var(--ink-text);font-size:16px;font-weight:700;line-height:1.2;letter-spacing:.01em;}
.brand-sub{color:var(--ink-muted);font-size:11.5px;letter-spacing:.14em;text-transform:uppercase;line-height:1.4;}
.nav-desktop{align-items:center;}
.nav-link{
  position:relative;
  color:var(--ink-text);
  font-size:15px;
  padding:6px 0;
  opacity:.86;
  transition:color .2s ease,opacity .2s ease;
}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:-6px;height:2px;width:0;
  background:var(--cyan);border-radius:2px;
  box-shadow:0 0 10px rgba(25,211,240,.85);
  transition:width .25s ease;
}
.nav-link:hover{color:#fff;opacity:1;}
.nav-link:hover::after{width:60%;}
.nav-link.active{color:#fff;opacity:1;text-shadow:0 0 14px rgba(25,211,240,.55);}
.nav-link.active::after{width:100%;}
.btn-nav-cta{
  display:inline-flex;align-items:center;justify-content:center;
  height:40px;padding:0 20px;border-radius:var(--r-btn);
  background:var(--cyan);color:#04202A;font-size:14.5px;font-weight:700;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease;
}
.btn-nav-cta:hover{background:#4BE0F7;box-shadow:0 0 20px rgba(25,211,240,.55);transform:translateY(-1px);}
.btn-nav-cta:active{transform:translateY(0);}
.burger{
  width:44px;height:44px;border-radius:12px;
  display:none;flex-direction:column;align-items:center;justify-content:center;gap:5px;
  border:1px solid rgba(25,211,240,.32);
}
.burger span{display:block;width:20px;height:2px;background:var(--ink-text);border-radius:2px;transition:.25s;}
.burger:hover span{background:var(--cyan);}
.neon-divider{height:1px;background:linear-gradient(90deg,transparent 0%,rgba(25,211,240,.85) 50%,transparent 100%);}
@media (max-width:1023px){
  .nav-desktop{display:none;}
  .burger{display:flex;}
}

/* 抽屉 */
.drawer-mask{
  position:fixed;inset:0;background:rgba(6,14,28,.55);z-index:60;
  opacity:0;pointer-events:none;transition:opacity .28s ease;
}
.drawer-mask.open{opacity:1;pointer-events:auto;}
.drawer{
  position:fixed;top:0;right:0;height:100%;width:80vw;max-width:340px;z-index:61;
  background:var(--ink);border-left:1px solid rgba(25,211,240,.28);
  transform:translateX(100%);transition:transform .3s ease;
  display:flex;flex-direction:column;
}
.drawer.open{transform:translateX(0);}
.drawer-head{padding:18px 20px;border-bottom:1px solid rgba(25,211,240,.18);}
.drawer-nav{flex:1;overflow-y:auto;padding:10px 0;}
.drawer-link{
  display:flex;align-items:center;height:52px;padding:0 20px;
  color:var(--ink-text);font-size:15.5px;border-left:3px solid transparent;
  transition:background .2s ease,color .2s ease;
}
.drawer-link:hover{background:rgba(25,211,240,.08);color:#fff;}
.drawer-link.active{border-left-color:var(--cyan);color:#fff;background:rgba(25,211,240,.1);}
.drawer-foot{padding:18px 20px;border-top:1px solid rgba(25,211,240,.18);}
.drawer-cta{
  display:flex;align-items:center;justify-content:center;height:46px;border-radius:var(--r-btn);
  background:var(--cyan);color:#04202A;font-weight:700;font-size:15px;
}

/* 按钮 */
.btn-primary{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;border-radius:var(--r-btn);
  background:var(--blue);color:#fff;font-weight:700;font-size:15.5px;
  box-shadow:0 10px 24px rgba(30,90,232,.24);
  transition:background .2s ease,transform .2s ease,box-shadow .2s ease;
}
.btn-primary:hover{background:#1a51d4;transform:translateY(-2px);box-shadow:0 16px 32px rgba(30,90,232,.3);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-btn);
  background:#fff;color:var(--blue);font-weight:700;font-size:15.5px;
  border:1px solid rgba(30,90,232,.4);
  transition:border-color .2s ease,background .2s ease,transform .2s ease;
}
.btn-ghost:hover{border-color:var(--blue);background:var(--blue-l);transform:translateY(-2px);}
.btn-dark{
  display:inline-flex;align-items:center;justify-content:center;
  height:48px;padding:0 26px;border-radius:999px;
  background:var(--cyan);color:#04202A;font-weight:700;font-size:15.5px;
  transition:box-shadow .2s ease,transform .2s ease;
}
.btn-dark:hover{box-shadow:0 0 26px rgba(25,211,240,.6);transform:translateY(-2px);}

/* 首屏 */
.page-hero{padding:44px 0 56px;}
@media (min-width:1024px){.page-hero{padding:56px 0 72px;}}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--muted);margin-bottom:26px;}
.crumb a{color:var(--muted);transition:color .2s ease;}
.crumb a:hover{color:var(--blue);}
.crumb .sep{color:#B9C5D6;}
.crumb .cur{color:var(--blue);font-weight:600;}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;font-weight:600;letter-spacing:.12em;color:var(--blue-d);
  text-transform:uppercase;margin-bottom:16px;
}
.hero-eyebrow::before{content:"";width:22px;height:2px;background:var(--cyan);border-radius:2px;}
.hero-title{
  font-size:32px;font-weight:700;line-height:1.22;letter-spacing:-.01em;color:var(--text);
}
@media (min-width:1024px){.hero-title{font-size:46px;}}
.hero-lead{margin-top:20px;font-size:16px;line-height:1.9;color:var(--muted);max-width:640px;}
.hero-actions{margin-top:28px;display:flex;flex-wrap:wrap;gap:14px;}
.hero-figure{
  position:relative;border-radius:20px;overflow:hidden;
  border:1px solid var(--line);
  background:linear-gradient(135deg,#E8EFFF 0%,#F6F8FC 100%);
  box-shadow:var(--shadow);
  aspect-ratio:16/10;
}
.hero-figure img{width:100%;height:100%;object-fit:cover;}
.hero-figure::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(10,18,32,0) 45%,rgba(10,18,32,.62) 100%);
}
.hero-corner{
  position:absolute;top:14px;right:14px;z-index:2;
  padding:6px 14px;border-radius:999px;
  background:rgba(10,18,32,.82);border:1px solid rgba(25,211,240,.55);
  color:var(--cyan);font-size:12.5px;font-weight:600;letter-spacing:.05em;
}
.hero-caption{
  position:absolute;left:20px;right:20px;bottom:18px;z-index:2;
  color:#E6EEF9;font-size:14px;line-height:1.7;
}

/* 目录 */
.toc{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:18px;box-shadow:var(--shadow);
}
.toc-title{
  font-size:12.5px;font-weight:700;letter-spacing:.12em;color:var(--blue-d);
  text-transform:uppercase;padding-bottom:12px;margin-bottom:8px;
  border-bottom:1px solid var(--line);
}
.toc-link{
  display:block;padding:10px 12px;border-radius:10px;font-size:14.5px;color:var(--muted);
  border-left:2px solid transparent;transition:all .2s ease;
}
.toc-link:hover{background:var(--blue-l);color:var(--blue-d);border-left-color:var(--cyan);}

/* 步骤 */
.step-card{
  display:grid;grid-template-columns:auto 1fr;gap:22px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:26px;box-shadow:var(--shadow);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.step-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:#D2DEEE;}
.step-num{
  width:64px;height:64px;flex:none;border-radius:16px;
  display:flex;align-items:center;justify-content:center;
  background:var(--ink);color:var(--cyan);
  font-size:23px;font-weight:800;letter-spacing:.02em;
  box-shadow:inset 0 0 22px rgba(25,211,240,.22),0 0 0 1px rgba(25,211,240,.4);
}
.step-title{font-size:20px;font-weight:700;line-height:1.4;}
.step-text{margin-top:12px;font-size:15px;line-height:1.9;color:var(--muted);}
.step-media{
  margin-top:18px;border-radius:12px;overflow:hidden;aspect-ratio:16/9;
  background:linear-gradient(135deg,#E8EFFF 0%,#F6F8FC 100%);
}
.step-media img{width:100%;height:100%;object-fit:cover;}

/* 自查清单 */
.check-grid{display:grid;gap:16px;}
@media (min-width:768px){.check-grid{grid-template-columns:1fr 1fr;}}
.check-item{
  display:flex;gap:14px;align-items:flex-start;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:18px 20px;box-shadow:var(--shadow);
  transition:transform .2s ease,box-shadow .2s ease;
}
.check-item:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);}
.check-dot{
  width:26px;height:26px;flex:none;border-radius:8px;margin-top:3px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(15,181,122,.12);color:var(--green);
  font-size:14px;font-weight:800;
}
.check-text{font-size:15px;line-height:1.8;color:var(--muted);}
.check-text b{color:var(--text);font-weight:600;}

/* 图文分栏 */
.split-card{
  background:#fff;border:1px solid var(--line);border-radius:20px;
  padding:26px;box-shadow:var(--shadow);
}
.split-media{
  border-radius:var(--r-card);overflow:hidden;aspect-ratio:4/3;
  background:linear-gradient(135deg,#E8EFFF 0%,#F6F8FC 100%);
}
.split-media img{width:100%;height:100%;object-fit:cover;}
.prep-item{
  display:flex;gap:16px;padding:18px 0;border-bottom:1px solid var(--line);
}
.prep-item:last-child{border-bottom:0;padding-bottom:0;}
.prep-idx{
  width:34px;height:34px;flex:none;border-radius:10px;
  background:var(--blue-l);color:var(--blue-d);
  display:flex;align-items:center;justify-content:center;
  font-size:14px;font-weight:800;
}
.prep-title{font-size:16.5px;font-weight:700;}
.prep-text{margin-top:6px;font-size:14.5px;line-height:1.85;color:var(--muted);}

/* 下一站卡片 */
.link-card{
  position:relative;display:block;overflow:hidden;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--shadow);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.link-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:#D2DEEE;}
.link-card::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:0;
  background:var(--cyan);transition:width .25s ease;
  box-shadow:0 0 14px rgba(25,211,240,.75);
}
.link-card:hover::before{width:2px;}
.link-card-img{aspect-ratio:16/9;overflow:hidden;background:linear-gradient(135deg,#E8EFFF 0%,#F6F8FC 100%);}
.link-card-img img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease;}
.link-card:hover .link-card-img img{transform:scale(1.04);}
.link-card-body{padding:20px 22px 24px;}
.link-card-tag{
  display:inline-block;padding:3px 10px;border-radius:999px;
  background:var(--blue-l);color:var(--blue-d);
  font-size:12px;font-weight:600;letter-spacing:.04em;
}
.link-card-title{margin-top:12px;font-size:18px;font-weight:700;line-height:1.45;}
.link-card:hover .link-card-title{color:var(--blue);}
.link-card-text{margin-top:10px;font-size:14.5px;line-height:1.85;color:var(--muted);}
.link-card-more{margin-top:16px;font-size:14px;font-weight:700;color:var(--blue);display:inline-flex;align-items:center;gap:6px;}

/* 区块标题 */
.sec-label{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;font-weight:700;letter-spacing:.12em;color:var(--blue-d);
  text-transform:uppercase;
}
.sec-label::before{content:"";width:20px;height:2px;background:var(--cyan);border-radius:2px;}
.sec-title{margin-top:14px;font-size:26px;font-weight:700;line-height:1.35;letter-spacing:-.01em;}
@media (min-width:1024px){.sec-title{font-size:32px;}}
.sec-desc{margin-top:14px;font-size:15.5px;line-height:1.9;color:var(--muted);max-width:720px;}

/* CTA 横幅 */
.cta-band{
  position:relative;overflow:hidden;
  background:var(--ink);border-radius:24px;
  padding:52px 28px;text-align:center;
}
@media (min-width:768px){.cta-band{padding:64px 48px;}}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background:repeating-linear-gradient(115deg,rgba(25,211,240,.13) 0px,rgba(25,211,240,.13) 1px,transparent 1px,transparent 22px);
  opacity:.7;pointer-events:none;
}
.cta-band-inner{position:relative;z-index:1;}
.cta-title{color:#fff;font-size:25px;font-weight:700;line-height:1.4;}
@media (min-width:1024px){.cta-title{font-size:32px;}}
.cta-sub{margin-top:16px;color:var(--ink-muted);font-size:15.5px;line-height:1.9;max-width:620px;margin-left:auto;margin-right:auto;}
.cta-actions{margin-top:30px;display:flex;flex-wrap:wrap;gap:14px;justify-content:center;}
.cta-text-link{
  display:inline-flex;align-items:center;height:48px;padding:0 6px;
  color:var(--cyan);font-size:15px;font-weight:600;
  border-bottom:1px solid rgba(25,211,240,.4);
  transition:color .2s ease,border-color .2s ease;
}
.cta-text-link:hover{color:#6FE9FB;border-color:#6FE9FB;}

/* 浮动 CTA */
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:45;
  display:flex;align-items:center;gap:14px;
  padding:10px 12px 10px 20px;border-radius:999px;
  background:rgba(10,18,32,.96);
  border:1px solid rgba(25,211,240,.42);
  box-shadow:0 14px 32px rgba(6,18,40,.3);
  opacity:0;transform:translateY(14px);pointer-events:none;
  transition:opacity .3s ease,transform .3s ease;
}
.float-cta.show{opacity:1;transform:translateY(0);pointer-events:auto;}
.float-btn{
  display:inline-flex;align-items:center;justify-content:center;
  height:38px;padding:0 18px;border-radius:999px;
  background:var(--cyan);color:#04202A;font-size:14.5px;font-weight:700;
  transition:box-shadow .2s ease;
}
.float-btn:hover{box-shadow:0 0 20px rgba(25,211,240,.6);}
.float-link{color:var(--ink-muted);font-size:14px;transition:color .2s ease;}
.float-link:hover{color:var(--cyan);}

/* 页脚 */
.site-footer{background:var(--ink);color:var(--ink-text);margin-top:88px;}
.footer-title{
  font-size:13px;font-weight:700;letter-spacing:.12em;color:#fff;
  text-transform:uppercase;margin-bottom:16px;position:relative;padding-bottom:10px;
}
.footer-title::after{
  content:"";position:absolute;left:0;bottom:0;width:22px;height:2px;
  background:var(--cyan);border-radius:2px;box-shadow:0 0 10px rgba(25,211,240,.7);
}
.footer-link{
  display:block;color:var(--ink-muted);font-size:14.5px;line-height:1.9;padding:5px 0;
  transition:color .2s ease,transform .2s ease;
}
.footer-link:hover{color:var(--cyan);transform:translateX(3px);}
.footer-bottom{border-top:1px solid rgba(25,211,240,.16);border-bottom:1px solid rgba(25,211,240,.16);}

/* 滚动淡入 */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease;}
.reveal.in{opacity:1;transform:none;}

@media (max-width:767px){
  body{padding-bottom:78px;}
  .step-card{grid-template-columns:1fr;padding:22px;}
  .step-num{width:52px;height:52px;font-size:19px;border-radius:14px;}
  .hero-title{font-size:28px;}
  .sec-title{font-size:22px;}
  .cta-title{font-size:22px;}
  .float-cta{
    left:12px;right:12px;bottom:12px;border-radius:16px;
    padding:10px;gap:10px;
  }
  .float-btn,.float-link{
    flex:1;height:44px;border-radius:12px;
    display:flex;align-items:center;justify-content:center;
  }
  .float-link{border:1px solid rgba(25,211,240,.34);border-radius:12px;}
}

/* roulang page: category2 */
:root{
  --brand:#1E5AE8;
  --brand-deep:#123A9E;
  --brand-soft:#E8EFFF;
  --ink:#0A1220;
  --ink-2:#0D1728;
  --cyan:#19D3F0;
  --green:#0FB57A;
  --orange:#FF7A2F;
  --bg:#F6F8FC;
  --card:#FFFFFF;
  --line:#E4EAF2;
  --text:#1A2433;
  --muted:#5A6B82;
  --r-card:16px;
  --r-btn:12px;
  --sh:0 6px 20px rgba(16,38,80,.06);
  --sh-h:0 14px 36px rgba(16,38,80,.12);
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  background:var(--bg);
  color:var(--text);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;cursor:pointer;}
h1,h2,h3,h4,p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:none;box-shadow:0 0 0 4px rgba(30,90,232,.25);border-radius:8px;}
section[id],[id]{scroll-margin-top:84px;}

.container-x{width:100%;max-width:1200px;margin:0 auto;padding-left:20px;padding-right:20px;}
@media (min-width:1024px){.container-x{padding-left:32px;padding-right:32px;}}

/* ============ 顶部导航 ============ */
.site-header{position:sticky;top:0;z-index:50;background:var(--ink);}
.neon-divider{height:1px;background:linear-gradient(90deg,transparent,rgba(25,211,240,.9),transparent);}
.brand-mark{
  width:40px;height:40px;border-radius:12px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--brand),var(--cyan));
  color:#fff;font-weight:800;font-size:14px;letter-spacing:.08em;
  box-shadow:0 0 0 1px rgba(25,211,240,.45),0 6px 18px rgba(25,211,240,.18);
  flex:0 0 auto;
}
.brand-title{color:#E6EEF9;font-size:15px;font-weight:700;line-height:1.15;letter-spacing:.02em;}
.brand-sub{color:#7E90A8;font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;line-height:1.4;}
.nav-desktop .nav-link{
  position:relative;color:#C3D2E6;font-size:15px;font-weight:500;padding:6px 2px;
  transition:color .2s ease-out;
}
.nav-desktop .nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:-8px;height:2px;border-radius:2px;
  background:var(--cyan);transform:scaleX(0);transition:transform .2s ease-out;
}
.nav-desktop .nav-link:hover{color:#E6EEF9;}
.nav-desktop .nav-link:hover::after{transform:scaleX(.6);}
.nav-desktop .nav-link.active{color:#fff;text-shadow:0 0 12px rgba(25,211,240,.75);}
.nav-desktop .nav-link.active::after{transform:scaleX(1);}
.btn-nav-cta{
  display:inline-flex;align-items:center;gap:8px;padding:9px 18px;border-radius:var(--r-btn);
  background:#9EEBFF;color:#062335;font-weight:700;font-size:14.5px;
  box-shadow:0 0 0 1px rgba(25,211,240,.5);
  transition:background .2s ease-out,box-shadow .2s ease-out,transform .2s ease-out;
}
.btn-nav-cta:hover{background:#C9F5FF;box-shadow:0 0 18px rgba(25,211,240,.55);transform:translateY(-1px);}
.btn-nav-cta:active{transform:translateY(1px);}
.burger{
  display:none;width:42px;height:42px;border-radius:12px;
  border:1px solid rgba(25,211,240,.35);background:rgba(255,255,255,.04);
  flex-direction:column;align-items:center;justify-content:center;gap:4px;
}
.burger span{display:block;width:18px;height:2px;background:#E6EEF9;border-radius:2px;}
@media (max-width:1023px){
  .nav-desktop{display:none;}
  .burger{display:flex;}
}

/* ============ 移动抽屉 ============ */
.drawer-overlay{
  position:fixed;inset:0;background:rgba(6,12,24,.55);opacity:0;visibility:hidden;
  transition:opacity .25s ease-out,visibility .25s ease-out;z-index:60;
}
.drawer-overlay.open{opacity:1;visibility:visible;}
.drawer{
  position:fixed;top:0;right:0;height:100%;width:80vw;max-width:360px;
  background:var(--ink-2);z-index:61;transform:translateX(100%);
  transition:transform .28s ease-out;display:flex;flex-direction:column;
  border-left:1px solid rgba(25,211,240,.25);
}
.drawer.open{transform:translateX(0);}
.drawer-head{padding:20px;border-bottom:1px solid rgba(255,255,255,.08);}
.drawer-nav{padding:12px 0;flex:1;overflow-y:auto;}
.drawer-nav a{
  display:flex;align-items:center;min-height:52px;padding:0 22px;
  color:#C3D2E6;font-size:15.5px;border-left:3px solid transparent;
}
.drawer-nav a:hover{color:#E6EEF9;background:rgba(25,211,240,.06);}
.drawer-nav a.active{color:#fff;border-left-color:var(--cyan);background:rgba(25,211,240,.1);}
.drawer-foot{padding:16px 20px 24px;border-top:1px solid rgba(255,255,255,.08);}
.drawer-foot .btn-nav-cta{width:100%;justify-content:center;}
body.drawer-lock{overflow:hidden;}

/* ============ 通用组件 ============ */
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:12.5px;font-weight:600;letter-spacing:.08em;color:var(--brand);
  text-transform:uppercase;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--cyan);border-radius:2px;}
.h1-page{font-size:32px;line-height:1.2;font-weight:700;letter-spacing:-.01em;}
@media (min-width:1024px){.h1-page{font-size:46px;}}
.h2-sec{font-size:23px;line-height:1.3;font-weight:700;letter-spacing:-.01em;}
@media (min-width:1024px){.h2-sec{font-size:32px;}}
.lead{font-size:16px;line-height:1.9;color:var(--muted);}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:var(--r-btn);font-size:15px;font-weight:600;
  transition:background .2s ease-out,color .2s ease-out,box-shadow .2s ease-out,transform .2s ease-out,border-color .2s ease-out;
  border:1px solid transparent;
}
.btn:active{transform:translateY(1px);}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 20px rgba(30,90,232,.22);}
.btn-primary:hover{background:var(--brand-deep);box-shadow:0 14px 32px rgba(30,90,232,.28);transform:translateY(-2px);}
.btn-secondary{background:#fff;color:var(--brand);border-color:rgba(30,90,232,.35);}
.btn-secondary:hover{background:var(--brand-soft);border-color:var(--brand);transform:translateY(-2px);}
.btn-dark-cyan{background:#9EEBFF;color:#062335;box-shadow:0 0 0 1px rgba(25,211,240,.45);}
.btn-dark-cyan:hover{background:#C9F5FF;box-shadow:0 0 22px rgba(25,211,240,.5);transform:translateY(-2px);}
.btn-text{color:var(--brand);font-weight:600;font-size:15px;display:inline-flex;align-items:center;gap:6px;}
.btn-text:hover{color:var(--brand-deep);}
.btn-text i{transition:transform .2s ease-out;}
.btn-text:hover i{transform:translateX(4px);}
.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh);transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--sh-h);border-color:#D6E2F5;}
.badge{
  display:inline-flex;align-items:center;gap:6px;padding:4px 11px;border-radius:999px;
  background:var(--brand-soft);color:var(--brand-deep);font-size:12.5px;font-weight:600;
}
.badge-green{background:rgba(15,181,122,.12);color:#0A7C55;}
.badge-orange{background:rgba(255,122,47,.13);color:#B44A0F;}
.badge-cyan{background:rgba(25,211,240,.15);color:#0B6B7E;}
.media-img{
  width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:12px;
  border:1px solid var(--line);
  background:linear-gradient(135deg,var(--brand-soft),#F6F8FC);
}
.section{padding-top:64px;padding-bottom:64px;}
@media (min-width:1024px){.section{padding-top:96px;padding-bottom:96px;}}
.section-tight{padding-top:48px;padding-bottom:48px;}
@media (min-width:1024px){.section-tight{padding-top:64px;padding-bottom:64px;}}
.divider-line{height:1px;background:var(--line);}

/* ============ 面包屑与页头 ============ */
.crumb{display:flex;align-items:center;gap:10px;font-size:13.5px;color:var(--muted);flex-wrap:wrap;}
.crumb a{color:var(--muted);transition:color .2s ease-out;}
.crumb a:hover{color:var(--brand);}
.crumb .sep{color:#B7C3D6;}
.crumb .now{color:var(--text);font-weight:600;}
.page-head{
  background:
    radial-gradient(900px 320px at 12% 0%,rgba(25,211,240,.16),transparent 60%),
    linear-gradient(180deg,#FFFFFF 0%,var(--bg) 100%);
  border-bottom:1px solid var(--line);
}
.head-media{
  border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);
  box-shadow:var(--sh);background:#fff;position:relative;
}
.head-media img{width:100%;height:100%;object-fit:cover;aspect-ratio:4/3;}
@media (min-width:1024px){.head-media img{aspect-ratio:16/11;}}
.head-media .corner{
  position:absolute;top:14px;right:14px;width:44px;height:2px;background:var(--cyan);
  box-shadow:0 0 12px rgba(25,211,240,.9);
}

/* ============ 保障卡 ============ */
.assure-card{padding:26px 24px;text-align:left;display:flex;flex-direction:column;gap:12px;}
.assure-ico{
  width:46px;height:46px;border-radius:14px;display:grid;place-items:center;
  background:var(--brand-soft);color:var(--brand);font-size:18px;
}
.assure-card h3{font-size:18px;font-weight:700;}
.assure-card p{font-size:14.5px;line-height:1.85;color:var(--muted);}

/* ============ 暗色指标条 ============ */
.metric-band{background:var(--ink);position:relative;overflow:hidden;}
.metric-band::before{
  content:"";position:absolute;inset:0;
  background:repeating-linear-gradient(115deg,rgba(25,211,240,.08) 0 1px,transparent 1px 90px);
  pointer-events:none;
}
.metric-num{font-size:30px;font-weight:800;color:var(--cyan);line-height:1.1;letter-spacing:.01em;}
.metric-label{font-size:13.5px;color:#93A5BE;margin-top:6px;}
@media (min-width:1024px){.metric-num{font-size:36px;}}

/* ============ 图文交错 ============ */
.zig{display:grid;gap:32px;align-items:center;}
@media (min-width:1024px){
  .zig{grid-template-columns:1fr 1fr;gap:64px;}
  .zig.rev .zig-media{order:2;}
}
.zig-body h3{font-size:20px;font-weight:700;margin-bottom:14px;}
@media (min-width:1024px){.zig-body h3{font-size:22px;}}
.zig-body p{font-size:15.5px;line-height:1.9;color:var(--muted);}
.zig-list{margin-top:18px;display:flex;flex-direction:column;gap:10px;}
.zig-list li{display:flex;gap:10px;font-size:15px;color:var(--text);line-height:1.8;}
.zig-list i{color:var(--green);margin-top:6px;font-size:13px;}
.zig-index{
  font-size:13px;font-weight:700;letter-spacing:.14em;color:var(--brand);
  display:inline-block;margin-bottom:10px;
}
.zig-media{position:relative;}
.zig-media .float-tag{
  position:absolute;left:16px;bottom:16px;background:rgba(10,18,32,.86);
  color:#E6EEF9;font-size:12.5px;padding:6px 12px;border-radius:999px;
  border:1px solid rgba(25,211,240,.4);backdrop-filter:blur(2px);
}

/* ============ 自查清单 ============ */
.check-panel{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh);padding:28px 24px;
}
@media (min-width:1024px){.check-panel{padding:36px 32px;}}
.check-grid{display:grid;gap:14px;}
@media (min-width:768px){.check-grid{grid-template-columns:1fr 1fr;gap:16px 28px;}}
.check-item{display:flex;gap:12px;align-items:flex-start;font-size:15px;line-height:1.8;}
.check-item i{
  flex:0 0 auto;width:22px;height:22px;border-radius:50%;display:grid;place-items:center;
  background:rgba(15,181,122,.12);color:#0A7C55;font-size:11px;margin-top:5px;
}
.risk-item i{background:rgba(255,122,47,.14);color:#B44A0F;}

/* ============ FAQ ============ */
.faq-wrap{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh);overflow:hidden;}
.faq-item + .faq-item{border-top:1px solid var(--line);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 22px;background:transparent;border:0;text-align:left;
  font-size:17px;font-weight:600;color:var(--text);transition:color .2s ease-out;
}
.faq-q:hover{color:var(--brand);}
.faq-icon{
  flex:0 0 auto;width:26px;height:26px;border-radius:50%;border:1px solid var(--line);
  display:grid;place-items:center;color:var(--brand);font-size:12px;
  transition:transform .25s ease-out,background .2s ease-out,border-color .2s ease-out;
}
.faq-item.open .faq-icon{transform:rotate(180deg);background:var(--brand-soft);border-color:rgba(30,90,232,.3);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease-out;}
.faq-a-inner{padding:0 22px 22px;font-size:15px;line-height:1.9;color:var(--muted);}

/* ============ CTA 横幅 ============ */
.cta-band{
  background:var(--ink);border-radius:20px;position:relative;overflow:hidden;
  padding:44px 24px;
}
@media (min-width:1024px){.cta-band{padding:60px 56px;}}
.cta-band::after{
  content:"";position:absolute;top:-40%;right:-10%;width:520px;height:520px;
  background:repeating-linear-gradient(115deg,rgba(25,211,240,.18) 0 2px,transparent 2px 26px);
  transform:rotate(8deg);pointer-events:none;
}
.cta-band h2{color:#fff;font-size:24px;font-weight:700;line-height:1.35;position:relative;z-index:1;}
@media (min-width:1024px){.cta-band h2{font-size:32px;}}
.cta-band p{color:#93A5BE;font-size:15px;line-height:1.85;position:relative;z-index:1;}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink);color:#93A5BE;margin-top:0;}
.footer-title{
  color:#E6EEF9;font-size:13px;font-weight:700;letter-spacing:.14em;
  margin-bottom:16px;position:relative;padding-bottom:12px;
}
.footer-title::after{
  content:"";position:absolute;left:0;bottom:0;width:26px;height:2px;
  background:var(--cyan);border-radius:2px;box-shadow:0 0 10px rgba(25,211,240,.7);
}
.footer-link{display:block;color:#93A5BE;font-size:14.5px;padding:6px 0;transition:color .2s ease-out,transform .2s ease-out;}
.footer-link:hover{color:var(--cyan);transform:translateX(3px);}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);}

/* ============ 浮动 CTA ============ */
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:45;
  display:flex;align-items:center;gap:14px;padding:10px 12px 10px 20px;
  background:rgba(10,18,32,.94);border:1px solid rgba(25,211,240,.55);
  border-radius:999px;box-shadow:0 18px 40px rgba(6,16,34,.35);
  opacity:0;visibility:hidden;transform:translateY(14px);
  transition:opacity .3s ease-out,transform .3s ease-out,visibility .3s ease-out;
}
.float-cta.show{opacity:1;visibility:visible;transform:translateY(0);}
.float-cta .float-link{color:#C3D2E6;font-size:13.5px;font-weight:600;transition:color .2s ease-out;}
.float-cta .float-link:hover{color:var(--cyan);}
@media (max-width:767px){
  .float-cta{
    left:0;right:0;bottom:0;border-radius:0;padding:10px 16px;gap:10px;
    justify-content:space-between;border-left:0;border-right:0;border-bottom:0;
  }
  .float-cta .btn-dark-cyan{flex:1 1 0;padding:11px 14px;}
  .float-cta .float-link{flex:1 1 0;text-align:center;padding:11px 8px;border:1px solid rgba(25,211,240,.35);border-radius:12px;}
  body{padding-bottom:72px;}
}

/* ============ 滚动淡入 ============ */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease-out,transform .6s ease-out;}
.reveal.is-visible{opacity:1;transform:translateY(0);}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none;}
  html{scroll-behavior:auto;}
}

/* roulang page: category3 */
:root{
  --blue:#1E5AE8;
  --blue-dark:#123A9E;
  --blue-light:#E8EFFF;
  --ink:#0A1220;
  --ink-2:#0D1728;
  --cyan:#19D3F0;
  --green:#0FB57A;
  --orange:#FF7A2F;
  --bg:#F6F8FC;
  --card:#FFFFFF;
  --line:#E4EAF2;
  --text:#1A2433;
  --muted:#5A6B82;
  --dark-text:#E6EEF9;
  --dark-muted:#93A5BE;
  --radius:16px;
  --radius-btn:12px;
  --shadow:0 6px 20px rgba(16,38,80,.06);
  --shadow-hover:0 14px 36px rgba(16,38,80,.12);
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font:inherit;border:0;background:none;cursor:pointer;color:inherit;}
h1,h2,h3,h4,p,ul,ol{margin:0;}
ul,ol{padding:0;list-style:none;}
:focus-visible{outline:4px solid rgba(30,90,232,.25);outline-offset:2px;border-radius:6px;}

.container-x{width:100%;max-width:1200px;margin:0 auto;padding:0 20px;}
@media(min-width:1024px){.container-x{padding:0 32px;}}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:50;
  background:var(--ink);
  box-shadow:0 10px 30px rgba(6,14,28,.35);
}
.brand-mark{
  width:42px;height:42px;flex:0 0 42px;
  display:flex;align-items:center;justify-content:center;
  border-radius:12px;
  background:linear-gradient(135deg,var(--blue) 0%,#2C7BF0 55%,var(--cyan) 100%);
  color:#fff;font-size:14px;font-weight:800;letter-spacing:.06em;
  box-shadow:0 0 0 1px rgba(25,211,240,.35),0 8px 22px rgba(25,211,240,.22);
}
.brand-title{color:#fff;font-size:15px;font-weight:700;letter-spacing:.01em;line-height:1.3;}
.brand-sub{color:rgba(25,211,240,.78);font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;line-height:1.3;}
.nav-link{
  position:relative;color:var(--dark-muted);font-size:15px;font-weight:500;
  padding:6px 0;transition:color .2s ease-out;
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--cyan),rgba(25,211,240,0));
  transform:scaleX(0);transform-origin:left;transition:transform .2s ease-out;
}
.nav-link:hover{color:var(--dark-text);}
.nav-link:hover::after{transform:scaleX(.6);}
.nav-link.active{color:#fff;text-shadow:0 0 12px rgba(25,211,240,.55);}
.nav-link.active::after{transform:scaleX(1);}
.btn-nav-cta{
  display:inline-flex;align-items:center;gap:8px;
  background:linear-gradient(180deg,#9FF0FE,#6FE3F7);
  color:#06131F;font-size:14.5px;font-weight:700;
  padding:10px 20px;border-radius:10px;
  transition:box-shadow .2s ease-out,transform .2s ease-out,filter .2s ease-out;
}
.btn-nav-cta:hover{filter:brightness(1.05);transform:translateY(-1px);box-shadow:0 0 0 1px rgba(25,211,240,.6),0 10px 26px rgba(25,211,240,.35);}
.btn-nav-cta:active{transform:translateY(1px);}
.neon-divider{height:1px;background:linear-gradient(90deg,transparent,var(--cyan),transparent);opacity:.85;}
.burger{
  width:42px;height:42px;border-radius:11px;display:none;
  flex-direction:column;align-items:center;justify-content:center;gap:5px;
  border:1px solid rgba(25,211,240,.35);
}
.burger span{display:block;width:18px;height:2px;border-radius:2px;background:var(--dark-text);}
@media(max-width:1023px){
  .nav-desktop{display:none;}
  .btn-nav-cta{display:none;}
  .burger{display:flex;}
}

/* 抽屉 */
.drawer-mask{
  position:fixed;inset:0;background:rgba(6,14,28,.6);
  opacity:0;visibility:hidden;transition:opacity .25s ease-out,visibility .25s;z-index:60;
}
.drawer-mask.open{opacity:1;visibility:visible;}
.drawer{
  position:fixed;top:0;right:0;height:100%;width:80vw;max-width:340px;z-index:61;
  background:var(--ink-2);border-left:1px solid rgba(25,211,240,.28);
  transform:translateX(102%);transition:transform .28s ease-out;
  display:flex;flex-direction:column;
}
.drawer.open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding:18px 20px;border-bottom:1px solid rgba(25,211,240,.18);}
.drawer-close{width:38px;height:38px;border-radius:10px;border:1px solid rgba(25,211,240,.3);color:var(--dark-text);display:flex;align-items:center;justify-content:center;}
.drawer-nav{padding:10px 0;flex:1;overflow-y:auto;}
.drawer-nav a{
  display:flex;align-items:center;height:52px;padding:0 22px;
  color:var(--dark-muted);font-size:15.5px;border-left:3px solid transparent;
}
.drawer-nav a:hover{color:var(--dark-text);background:rgba(25,211,240,.06);}
.drawer-nav a.active{color:#fff;border-left-color:var(--cyan);background:rgba(25,211,240,.09);text-shadow:0 0 10px rgba(25,211,240,.5);}
.drawer-foot{padding:16px 20px 22px;border-top:1px solid rgba(25,211,240,.18);}

/* ============ 通用组件 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 24px;border-radius:var(--radius-btn);font-size:15.5px;font-weight:600;
  transition:transform .2s ease-out,box-shadow .2s ease-out,background .2s ease-out,color .2s ease-out;
}
.btn-primary{background:var(--blue);color:#fff;box-shadow:0 8px 22px rgba(30,90,232,.25);}
.btn-primary:hover{background:#1A4FD0;transform:translateY(-2px) scale(1.02);box-shadow:0 14px 32px rgba(30,90,232,.32);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{background:#fff;color:var(--blue);border:1px solid var(--blue);}
.btn-ghost:hover{background:var(--blue-light);transform:translateY(-2px);box-shadow:var(--shadow-hover);}
.btn-cyan{display:inline-flex;align-items:center;justify-content:center;gap:8px;background:linear-gradient(180deg,#9FF0FE,#6FE3F7);color:#06131F;font-weight:700;font-size:15px;padding:12px 22px;border-radius:999px;transition:box-shadow .2s,transform .2s;}
.btn-cyan:hover{transform:translateY(-2px);box-shadow:0 0 0 1px rgba(25,211,240,.55),0 12px 28px rgba(25,211,240,.3);}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:12.5px;font-weight:600;letter-spacing:.08em;color:var(--blue);
  text-transform:uppercase;
}
.eyebrow::before{content:"";width:22px;height:2px;border-radius:2px;background:var(--cyan);}
.section{padding:64px 0;}
@media(min-width:1024px){.section{padding:104px 0;}}
.section-title{font-size:26px;line-height:1.3;font-weight:700;letter-spacing:-.01em;color:var(--text);}
@media(min-width:768px){.section-title{font-size:32px;}}
.section-lead{margin-top:16px;color:var(--muted);font-size:16px;max-width:760px;}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:999px;font-size:12.5px;font-weight:600;
  background:var(--blue-light);color:var(--blue-dark);
}
.badge-green{background:rgba(15,181,122,.12);color:#0A8A5E;}
.badge-orange{background:rgba(255,122,47,.13);color:#C75513;}

/* ============ 页头 Hero ============ */
.page-hero{
  background:
    radial-gradient(900px 380px at 88% -10%,rgba(25,211,240,.14),transparent 60%),
    linear-gradient(180deg,#FFFFFF 0%,#F2F6FD 100%);
  border-bottom:1px solid var(--line);
  padding:44px 0 56px;
}
@media(min-width:1024px){.page-hero{padding:56px 0 80px;}}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--muted);}
.crumb a{color:var(--blue);}
.crumb a:hover{text-decoration:underline;}
.crumb span.sep{color:#B9C6D8;}
.page-hero h1{
  margin-top:20px;
  font-size:28px;line-height:1.25;font-weight:700;letter-spacing:-.01em;
}
@media(min-width:768px){.page-hero h1{font-size:42px;}}
@media(min-width:1024px){.page-hero h1{font-size:48px;}}
.hero-lead{margin-top:20px;color:#43566E;font-size:16.5px;line-height:1.9;max-width:620px;}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}
.hero-badges{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px;}
.hero-badges .chip{
  display:inline-flex;align-items:center;gap:8px;
  background:#fff;border:1px solid var(--line);border-radius:999px;
  padding:7px 14px;font-size:13.5px;color:#43566E;box-shadow:var(--shadow);
}
.hero-badges .chip i{color:var(--green);font-size:12px;}
.hero-figure{position:relative;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow-hover);}
.hero-figure img{width:100%;height:100%;object-fit:cover;aspect-ratio:16/10;}
.hero-figure .corner{
  position:absolute;top:14px;right:14px;
  background:rgba(10,18,32,.82);color:#B9F3FD;
  border:1px solid rgba(25,211,240,.5);
  font-size:12.5px;letter-spacing:.06em;font-weight:600;
  padding:6px 12px;border-radius:999px;
}

/* ============ 速览暗色带 ============ */
.stat-band{background:var(--ink);color:var(--dark-text);}
.stat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:rgba(25,211,240,.16);}
@media(min-width:1024px){.stat-grid{grid-template-columns:repeat(4,1fr);}}
.stat-cell{background:var(--ink);padding:26px 22px;}
.stat-num{font-size:30px;font-weight:800;color:var(--cyan);letter-spacing:-.02em;line-height:1.1;}
.stat-label{margin-top:8px;font-size:13.5px;color:var(--dark-muted);}

/* ============ 定义列表 ============ */
.deflist{
  margin-top:40px;border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;background:var(--card);box-shadow:var(--shadow);
}
.def-row{display:grid;grid-template-columns:1fr;gap:6px;padding:20px 22px;border-bottom:1px solid var(--line);transition:background .2s ease-out;}
.def-row:last-child{border-bottom:0;}
.def-row:hover{background:#FAFCFF;}
@media(min-width:768px){
  .def-row{grid-template-columns:230px 1fr;gap:24px;padding:22px 26px;}
}
.def-key{font-weight:600;color:var(--blue-dark);font-size:15.5px;display:flex;align-items:flex-start;gap:10px;}
.def-key i{color:var(--cyan);font-size:12px;margin-top:7px;}
.def-val{color:#41556D;font-size:15.5px;line-height:1.85;}

/* ============ 折叠分组 ============ */
.config-group{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  margin-top:16px;overflow:hidden;box-shadow:var(--shadow);transition:box-shadow .2s ease-out;
}
.config-group:hover{box-shadow:var(--shadow-hover);}
.config-group summary{
  list-style:none;cursor:pointer;padding:20px 24px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  font-size:17px;font-weight:600;color:var(--text);
}
.config-group summary::-webkit-details-marker{display:none;}
.config-group summary:hover{color:var(--blue);}
.config-group summary .sign{
  width:30px;height:30px;flex:0 0 30px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:var(--blue-light);color:var(--blue);font-size:16px;font-weight:700;
  transition:transform .2s ease-out,background .2s;
}
.config-group[open] summary .sign{transform:rotate(180deg);background:var(--blue);color:#fff;}
.config-body{padding:0 24px 24px;border-top:1px solid var(--line);}
.config-body ul{margin-top:16px;display:grid;gap:12px;}
.config-body li{position:relative;padding-left:22px;color:#41556D;font-size:15.5px;line-height:1.85;}
.config-body li::before{content:"";position:absolute;left:0;top:11px;width:8px;height:8px;border-radius:2px;background:var(--cyan);}
.config-body .note{
  margin-top:18px;padding:14px 16px;border-radius:12px;
  background:var(--blue-light);color:var(--blue-dark);font-size:14.5px;line-height:1.8;
}

/* ============ 对比卡 ============ */
.fit-grid{display:grid;gap:24px;margin-top:40px;}
@media(min-width:768px){.fit-grid{grid-template-columns:1fr 1fr;}}
.fit-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px 24px;box-shadow:var(--shadow);transition:transform .2s ease-out,box-shadow .2s ease-out;}
.fit-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);}
.fit-card.yes{border-top:3px solid var(--green);}
.fit-card.no{border-top:3px solid var(--orange);}
.fit-head{display:flex;align-items:center;gap:12px;font-size:19px;font-weight:700;}
.fit-card.yes .fit-head i{color:var(--green);}
.fit-card.no .fit-head i{color:var(--orange);}
.fit-card ul{margin-top:20px;display:grid;gap:14px;}
.fit-card li{display:flex;gap:12px;color:#41556D;font-size:15.5px;line-height:1.8;}
.fit-card li i{margin-top:6px;font-size:12px;}
.fit-card.yes li i{color:var(--green);}
.fit-card.no li i{color:var(--orange);}

/* ============ 检查清单进度 ============ */
.meter-wrap{margin-top:40px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow);}
.meter-row{display:grid;grid-template-columns:1fr auto;gap:8px 16px;align-items:center;padding:16px 0;border-bottom:1px dashed var(--line);}
.meter-row:last-child{border-bottom:0;}
.meter-name{font-size:15.5px;font-weight:600;color:var(--text);}
.meter-val{font-size:14px;font-weight:700;color:var(--blue);}
.meter-track{grid-column:1 / -1;height:8px;border-radius:999px;background:var(--blue-light);overflow:hidden;}
.meter-fill{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,var(--blue),var(--cyan));}

/* ============ FAQ ============ */
.faq-box{margin-top:40px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;}
.faq-item + .faq-item{border-top:1px solid var(--line);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  text-align:left;padding:22px 24px;font-size:17px;font-weight:600;color:var(--text);
  transition:color .2s ease-out,background .2s ease-out;
}
.faq-q:hover{color:var(--blue);background:#FAFCFF;}
.faq-icon{
  width:30px;height:30px;flex:0 0 30px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:var(--blue-light);color:var(--blue);font-size:17px;font-weight:700;
  transition:transform .25s ease-out,background .2s;
}
.faq-item.open .faq-icon{transform:rotate(180deg);background:var(--blue);color:#fff;}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease-out;}
.faq-a p{padding:0 24px 22px;color:var(--muted);font-size:15px;line-height:1.9;}

/* ============ CTA 横幅 ============ */
.cta-band{
  position:relative;overflow:hidden;background:var(--ink);color:var(--dark-text);
  border-radius:20px;padding:44px 26px;
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background:repeating-linear-gradient(115deg,rgba(25,211,240,.14) 0 2px,transparent 2px 46px);
  opacity:.7;pointer-events:none;
}
.cta-band > *{position:relative;z-index:1;}
.cta-band h2{font-size:26px;font-weight:700;line-height:1.3;}
@media(min-width:768px){.cta-band h2{font-size:32px;}}
.cta-band p{margin-top:14px;color:var(--dark-muted);font-size:15.5px;max-width:620px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px;}
.btn-outline-cyan{display:inline-flex;align-items:center;gap:8px;padding:13px 24px;border-radius:var(--radius-btn);border:1px solid rgba(25,211,240,.55);color:#B9F3FD;font-size:15.5px;font-weight:600;transition:background .2s,transform .2s;}
.btn-outline-cyan:hover{background:rgba(25,211,240,.12);transform:translateY(-2px);}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink);color:var(--dark-muted);margin-top:0;}
.site-footer .brand-title{color:#fff;}
.footer-title{font-size:13px;letter-spacing:.12em;font-weight:600;color:#fff;text-transform:uppercase;margin-bottom:16px;position:relative;padding-bottom:12px;}
.footer-title::after{content:"";position:absolute;left:0;bottom:0;width:26px;height:2px;background:var(--cyan);border-radius:2px;}
.footer-link{display:block;font-size:14.5px;color:var(--dark-muted);padding:6px 0;transition:color .2s ease-out;}
.footer-link:hover{color:var(--cyan);}
.footer-bottom{border-top:1px solid rgba(25,211,240,.16);background:#08101D;}

/* ============ 浮动 CTA ============ */
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:45;
  display:flex;align-items:center;gap:14px;
  background:rgba(10,18,32,.94);
  border:1px solid rgba(25,211,240,.45);
  border-radius:999px;padding:10px 12px 10px 20px;
  box-shadow:0 18px 40px rgba(6,14,28,.4);
  opacity:0;transform:translateY(14px);pointer-events:none;
  transition:opacity .3s ease-out,transform .3s ease-out;
}
.float-cta.show{opacity:1;transform:translateY(0);pointer-events:auto;}
.float-cta .float-text{color:var(--dark-text);font-size:14px;white-space:nowrap;}
.float-cta .float-link{color:var(--cyan);font-size:13.5px;white-space:nowrap;}
.float-cta .float-link:hover{text-decoration:underline;}
@media(max-width:767px){
  body{padding-bottom:82px;}
  .float-cta{
    left:12px;right:12px;bottom:12px;border-radius:14px;
    padding:10px 12px;justify-content:space-between;gap:10px;
  }
  .float-cta .float-text{display:none;}
  .float-cta .btn-cyan{flex:1;}
  .float-cta .float-link{flex:0 0 auto;}
}

/* ============ 动效 ============ */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .5s ease-out,transform .5s ease-out;}
.reveal.in{opacity:1;transform:none;}
section[id],div[id]{scroll-margin-top:88px;}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  .reveal{opacity:1;transform:none;transition:none;}
}

/* roulang page: category4 */
:root{
  --blue:#1E5AE8; --blue-deep:#123A9E; --blue-soft:#E8EFFF;
  --ink:#0A1220; --ink-2:#0D1728;
  --cyan:#19D3F0; --green:#0FB57A; --orange:#FF7A2F;
  --bg:#F6F8FC; --card:#FFFFFF; --line:#E4EAF2;
  --text:#1A2433; --muted:#5A6B82; --muted-2:#93A5BE;
  --r:16px; --r-btn:12px;
  --shadow:0 6px 20px rgba(16,38,80,.06);
  --shadow-h:0 14px 36px rgba(16,38,80,.12);
  --t:200ms ease-out;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  font-size:16px;line-height:1.85;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
h1,h2,h3,h4{margin:0;line-height:1.25;font-weight:700;letter-spacing:-.01em}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
section{scroll-margin-top:88px}
:focus-visible{box-shadow:0 0 0 4px rgba(30,90,232,.25);border-radius:8px;outline:none}

/* 容器 */
.container-x{max-width:1200px;margin:0 auto;padding:0 20px}
@media (min-width:1024px){.container-x{padding:0 32px}}

/* 头部导航 */
.site-header{position:sticky;top:0;z-index:50;background:var(--ink)}
.neon-divider{height:1px;background:linear-gradient(90deg,transparent,rgba(25,211,240,.85),transparent)}
.brand-mark{width:42px;height:42px;border-radius:12px;display:inline-flex;align-items:center;justify-content:center;
  font-size:15px;font-weight:800;letter-spacing:.06em;color:#fff;
  background:linear-gradient(135deg,#1E5AE8,#0D1728);border:1px solid rgba(25,211,240,.45)}
.brand-title{color:#E6EEF9;font-size:15px;font-weight:700;line-height:1.3}
.brand-sub{color:#7E90A8;font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;line-height:1.3}
.nav-desktop{display:none}
@media (min-width:1024px){.nav-desktop{display:flex}}
.nav-link{position:relative;color:#93A5BE;font-size:15px;font-weight:500;padding:6px 2px;transition:color var(--t)}
.nav-link::after{content:"";position:absolute;left:0;right:0;bottom:-6px;height:2px;border-radius:2px;
  background:var(--cyan);opacity:0;transform:scaleX(.6);transition:opacity var(--t),transform var(--t)}
.nav-link:hover{color:#E6EEF9}
.nav-link:hover::after{opacity:.6;transform:scaleX(1)}
.nav-link.active{color:#fff;text-shadow:0 0 12px rgba(25,211,240,.6)}
.nav-link.active::after{opacity:1;transform:scaleX(1)}
.btn-nav-cta{display:inline-flex;align-items:center;justify-content:center;
  background:#CFF6FF;color:#062033;font-weight:700;font-size:14.5px;
  padding:10px 20px;border-radius:var(--r-btn);transition:box-shadow var(--t),transform var(--t),background var(--t)}
.btn-nav-cta:hover{background:#B6EEFF;box-shadow:0 0 0 1px rgba(25,211,240,.7),0 10px 24px rgba(25,211,240,.28);transform:translateY(-1px)}
.btn-nav-cta:active{transform:translateY(0)}
.burger{width:42px;height:42px;border-radius:12px;border:1px solid rgba(25,211,240,.35);
  display:none;flex-direction:column;gap:5px;align-items:center;justify-content:center;background:rgba(255,255,255,.03)}
.burger span{width:18px;height:2px;border-radius:2px;background:#E6EEF9;display:block;transition:background var(--t)}
.burger:hover span{background:var(--cyan)}
@media (max-width:1023px){.nav-mobile-trigger{display:flex}}

/* 抽屉 */
.scrim{position:fixed;inset:0;background:rgba(6,12,24,.6);opacity:0;pointer-events:none;transition:opacity .3s ease-out;z-index:55}
.scrim.show{opacity:1;pointer-events:auto}
.drawer{position:fixed;top:0;right:0;height:100%;width:80vw;max-width:340px;background:var(--ink-2);
  z-index:60;transform:translateX(100%);transition:transform .3s ease-out;
  display:flex;flex-direction:column;padding:22px 22px 28px;overflow-y:auto}
.drawer.open{transform:none}
.drawer-close{width:38px;height:38px;border-radius:10px;border:1px solid rgba(25,211,240,.3);color:#E6EEF9;font-size:20px;line-height:1}
.drawer-close:hover{border-color:var(--cyan);color:var(--cyan)}
.drawer-link{display:block;line-height:52px;padding-left:14px;color:#93A5BE;font-size:15.5px;font-weight:500;
  border-left:3px solid transparent;transition:color var(--t),border-color var(--t),background var(--t)}
.drawer-link:hover{color:#E6EEF9;background:rgba(25,211,240,.06)}
.drawer-link.active{color:#fff;border-left-color:var(--cyan);background:rgba(25,211,240,.08)}
.drawer-foot{margin-top:auto;padding-top:20px;border-top:1px solid rgba(147,165,190,.18)}

/* 通用按钮 */
.btn-primary{display:inline-flex;align-items:center;justify-content:center;gap:8px;
  background:var(--blue);color:#fff;font-weight:600;font-size:15.5px;padding:13px 26px;border-radius:var(--r-btn);
  box-shadow:0 8px 20px rgba(30,90,232,.22);transition:background var(--t),box-shadow var(--t),transform var(--t)}
.btn-primary:hover{background:#1a4fcd;transform:translateY(-2px) scale(1.02);box-shadow:0 14px 30px rgba(30,90,232,.3)}
.btn-primary:active{transform:translateY(0) scale(1)}
.btn-secondary{display:inline-flex;align-items:center;justify-content:center;gap:8px;
  background:#fff;color:var(--blue);font-weight:600;font-size:15.5px;padding:12px 24px;border-radius:var(--r-btn);
  border:1px solid var(--blue);transition:background var(--t),box-shadow var(--t),transform var(--t)}
.btn-secondary:hover{background:var(--blue-soft);transform:translateY(-2px);box-shadow:var(--shadow-h)}
.btn-dark{display:inline-flex;align-items:center;justify-content:center;gap:8px;
  background:#CFF6FF;color:#062033;font-weight:700;font-size:15px;padding:12px 24px;border-radius:var(--r-btn);
  transition:box-shadow var(--t),transform var(--t)}
.btn-dark:hover{box-shadow:0 0 0 1px rgba(25,211,240,.8),0 12px 26px rgba(25,211,240,.25);transform:translateY(-2px)}
.btn-text{display:inline-flex;align-items:center;gap:6px;color:var(--blue);font-weight:600;font-size:15px;transition:gap var(--t),color var(--t)}
.btn-text:hover{gap:11px;color:var(--blue-deep)}
.btn-text-light{display:inline-flex;align-items:center;gap:6px;color:#CFF6FF;font-weight:600;font-size:15px;transition:gap var(--t)}
.btn-text-light:hover{gap:11px;color:var(--cyan)}

/* 标签与徽章 */
.badge{display:inline-flex;align-items:center;gap:6px;padding:5px 12px;border-radius:999px;
  background:var(--blue-soft);color:var(--blue-deep);font-size:12.5px;font-weight:600;line-height:1.6}
.badge-green{background:rgba(15,181,122,.12);color:#0B8A5D}
.badge-dark{background:rgba(25,211,240,.12);color:#19D3F0;border:1px solid rgba(25,211,240,.35)}
.sec-label{display:inline-flex;align-items:center;gap:10px;font-size:12.5px;font-weight:600;letter-spacing:.08em;color:var(--blue);text-transform:uppercase}
.sec-label::before{content:"";width:22px;height:2px;background:var(--cyan);border-radius:2px}
.sec-title{font-size:24px}
@media (min-width:768px){.sec-title{font-size:30px}}
.sec-desc{color:var(--muted);font-size:15.5px;margin-top:12px;max-width:640px}

/* 页头 */
.page-hero{padding:36px 0 10px}
@media (min-width:1024px){.page-hero{padding:52px 0 22px}}
.crumb{display:flex;align-items:center;gap:8px;flex-wrap:wrap;font-size:13.5px;color:var(--muted);margin-bottom:20px}
.crumb a:hover{color:var(--blue)}
.crumb .sep{color:#C3CEDD}
.crumb .cur{color:var(--text);font-weight:600}
.hero-title{font-size:29px;line-height:1.22}
@media (min-width:768px){.hero-title{font-size:40px}}
@media (min-width:1024px){.hero-title{font-size:46px}}
.hero-lead{color:var(--muted);font-size:15.8px;line-height:1.95;margin-top:18px;max-width:640px}
.img-frame{position:relative;border-radius:var(--r);overflow:hidden;border:1px solid var(--line);background:linear-gradient(135deg,#E8EFFF,#F6F8FC);box-shadow:var(--shadow)}
.img-frame img{width:100%;height:100%;object-fit:cover;aspect-ratio:16/10}
.neon-corner{position:absolute;top:12px;right:12px;width:44px;height:44px;border-top:2px solid var(--cyan);border-right:2px solid var(--cyan);border-radius:0 12px 0 0;pointer-events:none}

/* 搜索框 */
.search-box{background:var(--card);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow);padding:14px;
  display:flex;gap:12px;align-items:center;flex-wrap:wrap}
.search-input{flex:1 1 240px;min-width:0;border:1px solid var(--line);border-radius:var(--r-btn);padding:11px 16px;font-size:15px;
  background:#fff;color:var(--text);transition:border-color var(--t),box-shadow var(--t);height:46px}
.search-input::placeholder{color:#9AAABF}
.search-input:focus{border-color:var(--blue);box-shadow:0 0 0 4px rgba(30,90,232,.14);outline:none}
.search-btn{height:46px;padding:0 24px;border-radius:var(--r-btn);background:var(--blue);color:#fff;font-weight:600;font-size:15px;
  transition:background var(--t),transform var(--t),box-shadow var(--t)}
.search-btn:hover{background:#1a4fcd;transform:translateY(-1px);box-shadow:0 10px 22px rgba(30,90,232,.25)}
.search-btn:active{transform:translateY(0)}
.filter-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
.filter-tag{display:inline-flex;align-items:center;gap:7px;padding:8px 16px;border-radius:999px;background:#fff;
  border:1px solid var(--line);color:var(--muted);font-size:14px;font-weight:600;transition:all var(--t)}
.filter-tag:hover{border-color:var(--blue);color:var(--blue);transform:translateY(-1px)}
.filter-tag.active{background:var(--blue);border-color:var(--blue);color:#fff;box-shadow:0 8px 18px rgba(30,90,232,.22)}
.filter-tag .dot{width:6px;height:6px;border-radius:50%;background:var(--cyan)}

/* 卡片 */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow);
  padding:22px;transition:box-shadow var(--t),transform var(--t),border-color var(--t)}
.card:hover{box-shadow:var(--shadow-h);transform:translateY(-4px);border-color:#D6E2F5}
.card-title{font-size:17px;font-weight:700;margin-bottom:8px}
.card-text{color:var(--muted);font-size:14.6px;line-height:1.9}
.icon-chip{width:40px;height:40px;border-radius:12px;display:inline-flex;align-items:center;justify-content:center;
  background:var(--blue-soft);color:var(--blue);font-weight:800;font-size:14px}
.card:hover .icon-chip{background:var(--blue);color:#fff}

/* FAQ 手风琴 */
.faq-card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow);overflow:hidden}
.faq-item + .faq-item{border-top:1px solid var(--line)}
.faq-q{width:100%;display:flex;align-items:flex-start;justify-content:space-between;gap:18px;text-align:left;
  padding:20px 22px;font-size:16.5px;font-weight:600;color:var(--text);line-height:1.6;transition:color var(--t),background var(--t)}
.faq-q:hover{color:var(--blue);background:#FBFCFE}
.faq-icon{flex:0 0 auto;width:26px;height:26px;border-radius:50%;border:1px solid var(--line);position:relative;
  transition:transform .3s ease-out,border-color var(--t),background var(--t);margin-top:2px}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--blue);border-radius:2px;top:50%;left:50%;
  transform:translate(-50%,-50%)}
.faq-icon::before{width:11px;height:2px}
.faq-icon::after{width:2px;height:11px;transition:opacity .3s ease-out}
.faq-item.open .faq-icon{transform:rotate(180deg);background:var(--blue-soft);border-color:rgba(30,90,232,.35)}
.faq-item.open .faq-icon::after{opacity:0}
.faq-item.open .faq-q{color:var(--blue)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease-out}
.faq-a-inner{padding:0 22px 22px;color:var(--muted);font-size:15px;line-height:1.9}

/* 暗色区 */
.dark-band{background:var(--ink);position:relative;overflow:hidden}
.dark-band::after{content:"";position:absolute;inset:0;pointer-events:none;
  background:repeating-linear-gradient(115deg,rgba(25,211,240,.10) 0 1px,transparent 1px 46px);opacity:.7}
.dark-band .inner{position:relative;z-index:1}
.dark-card{border:1px solid rgba(25,211,240,.4);border-radius:var(--r);background:rgba(13,23,40,.7);padding:22px;
  box-shadow:inset 0 0 24px rgba(25,211,240,.07);transition:border-color var(--t),transform var(--t)}
.dark-card:hover{border-color:rgba(25,211,240,.85);transform:translateY(-4px)}
.dark-num{font-size:30px;font-weight:800;color:var(--cyan);line-height:1;letter-spacing:.02em}
.dark-title{color:#E6EEF9;font-size:16.5px;font-weight:700;margin:12px 0 8px}
.dark-text{color:#93A5BE;font-size:14.6px;line-height:1.9}

/* 联系卡 */
.contact-card{background:linear-gradient(135deg,#FFFFFF 0%,#F1F6FF 100%);border:1px solid var(--line);border-radius:var(--r);
  box-shadow:var(--shadow);overflow:hidden}
.contact-row{display:flex;flex-wrap:wrap;gap:10px 28px;margin-top:14px;font-size:15px;color:var(--muted)}
.contact-row strong{color:var(--text);font-weight:600}

/* CTA 横幅 */
.cta-banner{background:var(--ink);border-radius:var(--r);position:relative;overflow:hidden;padding:34px 24px}
@media (min-width:768px){.cta-banner{padding:46px 44px}}
.cta-banner::before{content:"";position:absolute;inset:0;
  background:repeating-linear-gradient(115deg,rgba(25,211,240,.12) 0 1px,transparent 1px 52px);pointer-events:none}
.cta-banner .inner{position:relative;z-index:1}
.cta-title{color:#fff;font-size:24px}
@media (min-width:768px){.cta-title{font-size:30px}}
.cta-text{color:#93A5BE;font-size:15px;margin-top:12px;max-width:560px}

/* 页脚 */
.site-footer{background:var(--ink);margin-top:72px}
@media (min-width:1024px){.site-footer{margin-top:104px}}
.footer-title{color:#E6EEF9;font-size:13px;font-weight:700;letter-spacing:.1em;margin-bottom:16px;position:relative;padding-bottom:10px}
.footer-title::after{content:"";position:absolute;left:0;bottom:0;width:24px;height:2px;background:var(--cyan);border-radius:2px}
.footer-link{display:block;color:#93A5BE;font-size:14.5px;line-height:2.2;transition:color var(--t),padding-left var(--t)}
.footer-link:hover{color:var(--cyan);padding-left:4px}
.footer-bottom{border-top:1px solid rgba(147,165,190,.16);border-bottom:1px solid rgba(147,165,190,.16)}

/* 浮动 CTA */
.float-cta{position:fixed;right:24px;bottom:24px;z-index:45;display:flex;align-items:center;gap:16px;
  background:rgba(10,18,32,.97);border:1px solid rgba(25,211,240,.45);border-radius:999px;
  padding:10px 12px 10px 22px;box-shadow:0 18px 40px rgba(6,16,32,.35);
  opacity:0;transform:translateY(14px);pointer-events:none;transition:opacity .35s ease-out,transform .35s ease-out}
.float-cta.show{opacity:1;transform:none;pointer-events:auto}
.float-cta .tip{color:#93A5BE;font-size:13.5px;white-space:nowrap}
@media (max-width:767px){
  body{padding-bottom:76px}
  .float-cta{left:0;right:0;bottom:0;border-radius:0;border-left:0;border-right:0;border-bottom:0;
    padding:10px 16px;gap:10px;justify-content:space-between}
  .float-cta .tip{display:none}
  .float-cta .btn-dark,.float-cta .btn-text-light{flex:1 1 0;height:46px;padding:0 12px;font-size:15px}
  .float-cta .btn-text-light{justify-content:center;border:1px solid rgba(25,211,240,.4);border-radius:var(--r-btn)}
}

/* 淡入 */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease-out,transform .6s ease-out}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
}