/* roulang page: index */
:root{
  --brand:#1358C4;
  --brand-deep:#0B3E92;
  --accent:#FF6A2B;
  --neon:#2FE0D0;
  --bg:#F4F7FC;
  --surface:#FFFFFF;
  --line:#E3E9F2;
  --ink:#16202E;
  --muted:#5A6B82;
  --inverse:#F8FAFF;
  --dark:#0A1424;
  --r-lg:20px;
  --r-md:16px;
  --r-sm:10px;
  --r-img:14px;
  --sh-idle:0 6px 20px rgba(13,42,86,.07);
  --sh-hover:0 14px 34px rgba(13,42,86,.14);
  --sec-gap:88px;
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.8;
  font-variant-numeric:tabular-nums;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button,input,textarea{font:inherit;color:inherit;}
button{cursor:pointer;border:0;background:none;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
:focus-visible{outline:2px solid var(--neon);outline-offset:2px;border-radius:6px;}
::selection{background:rgba(47,224,208,.35);}

.container-x{max-width:1200px;margin:0 auto;padding:0 32px;width:100%;}
.sec{padding:var(--sec-gap) 0;}
.sec-tight{padding:56px 0;}

/* ---------- 公告条 ---------- */
.notice-bar{
  background:linear-gradient(90deg,var(--brand-deep),var(--brand));
  color:#fff;font-size:13px;line-height:1.6;
  padding:8px 0;
}
.notice-inner{display:flex;align-items:center;gap:12px;justify-content:center;text-align:center;}
.notice-inner i{color:var(--neon);}
.notice-inner strong{color:#fff;font-weight:700;}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--dark);
  border-bottom:1px solid rgba(47,224,208,.14);
}
.site-header::before{
  content:"";display:block;height:2px;
  background:linear-gradient(90deg,var(--neon),var(--brand) 55%,transparent);
}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;height:64px;gap:20px;}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.logo-mark{
  width:34px;height:34px;border-radius:10px;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--brand),var(--neon));
  color:#04121F;font-size:15px;
  box-shadow:0 0 0 1px rgba(47,224,208,.5),0 0 16px rgba(47,224,208,.28);
}
.logo-text{color:var(--inverse);font-weight:800;font-size:18px;letter-spacing:.5px;display:flex;align-items:center;gap:6px;}
.logo-sub{
  font-size:11px;font-weight:600;line-height:1;padding:4px 7px;border-radius:999px;
  color:var(--neon);border:1px solid rgba(47,224,208,.45);
  background:rgba(47,224,208,.08);letter-spacing:0;
}
.nav-desktop{display:flex;align-items:center;gap:6px;}
.nav-link{
  position:relative;display:block;padding:10px 12px;
  color:rgba(248,250,255,.78);font-size:15px;font-weight:500;
  border-radius:8px;transition:color .2s ease,background .2s ease;
}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:4px;height:2px;
  background:var(--neon);border-radius:2px;transform:scaleX(0);transform-origin:left;
  transition:transform .22s ease;
}
.nav-link:hover{color:#fff;background:rgba(47,224,208,.08);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.active{
  color:#fff;text-shadow:0 0 12px rgba(47,224,208,.75);
}
.nav-link.active::after{transform:scaleX(1);}
.nav-right{display:flex;align-items:center;gap:12px;}
.btn-nav{
  display:inline-flex;align-items:center;gap:7px;
  background:var(--brand);color:#fff;font-size:14px;font-weight:600;
  padding:9px 16px;border-radius:var(--r-sm);
  transition:background .2s ease,box-shadow .2s ease,transform .2s ease;
}
.btn-nav:hover{background:#1a68e0;box-shadow:0 0 0 1px rgba(47,224,208,.6),0 0 18px rgba(47,224,208,.35);transform:translateY(-1px);}
.burger{
  display:none;width:42px;height:42px;border-radius:10px;
  border:1px solid rgba(47,224,208,.35);color:var(--inverse);font-size:17px;
  align-items:center;justify-content:center;
}
.burger:hover{background:rgba(47,224,208,.12);}
.mobile-drawer{
  display:none;background:var(--dark);border-top:1px solid rgba(47,224,208,.16);
  padding:8px 0 18px;
}
.mobile-drawer.open{display:block;animation:drawerIn .22s ease;}
@keyframes drawerIn{from{opacity:0;transform:translateY(-8px);}to{opacity:1;transform:translateY(0);}}
.mobile-drawer a{
  display:flex;align-items:center;justify-content:space-between;
  height:48px;padding:0 32px;color:rgba(248,250,255,.85);font-size:15px;
  border-bottom:1px solid rgba(255,255,255,.05);
}
.mobile-drawer a.active{color:#fff;text-shadow:0 0 12px rgba(47,224,208,.7);}
.mobile-drawer a:hover{background:rgba(47,224,208,.08);}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:var(--r-sm);font-size:15px;font-weight:700;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease,border-color .2s ease;
  border:1px solid transparent;white-space:nowrap;
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 6px 18px rgba(19,88,196,.28);}
.btn-primary:hover{background:#1a68e0;transform:translateY(-2px);box-shadow:0 12px 26px rgba(19,88,196,.34);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{border-color:var(--brand);color:var(--brand);background:transparent;}
.btn-ghost:hover{background:rgba(19,88,196,.08);transform:translateY(-2px);}
.btn-accent{background:var(--accent);color:#fff;box-shadow:0 6px 18px rgba(255,106,43,.3);}
.btn-accent:hover{background:#ff7d45;transform:translateY(-2px);box-shadow:0 12px 26px rgba(255,106,43,.36);}
.btn-neon{
  border-color:rgba(47,224,208,.6);color:var(--neon);background:rgba(47,224,208,.06);
}
.btn-neon:hover{background:rgba(47,224,208,.14);transform:translateY(-2px);box-shadow:0 0 20px rgba(47,224,208,.28);}
.btn-sm{padding:9px 18px;font-size:14px;}

/* ---------- 标签 / 徽章 ---------- */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  font-size:13px;line-height:1;padding:7px 12px;border-radius:999px;
  background:rgba(19,88,196,.09);color:var(--brand-deep);font-weight:600;
}
.tag-accent{background:var(--accent);color:#fff;}
.tag-neon{background:rgba(47,224,208,.12);color:#0d7a72;border:1px solid rgba(47,224,208,.4);}
.badge{
  display:inline-flex;align-items:center;gap:5px;
  font-size:12px;font-weight:700;line-height:1;padding:6px 11px;border-radius:999px;
  background:rgba(19,88,196,.1);color:var(--brand-deep);
}
.badge-dark{background:rgba(10,20,36,.85);color:#fff;}

/* ---------- Hero ---------- */
.hero{
  position:relative;overflow:hidden;
  background:linear-gradient(180deg,#FFFFFF 0%,#EAF1FC 100%);
  padding:64px 0 0;
}
.hero::after{
  content:"";position:absolute;right:-120px;top:-120px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(47,224,208,.20),transparent 68%);
  pointer-events:none;
}
.hero-grid{display:grid;grid-template-columns:6fr 6fr;gap:48px;align-items:center;position:relative;z-index:2;}
.hero-brandline{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;letter-spacing:1px;
  color:var(--brand-deep);background:#fff;border:1px solid var(--line);
  padding:7px 14px;border-radius:999px;box-shadow:var(--sh-idle);
}
.hero-brandline i{color:var(--accent);}
.hero h1{
  font-size:40px;line-height:1.28;font-weight:800;letter-spacing:-.4px;
  margin:20px 0 16px;color:var(--ink);
}
.hero h1 em{font-style:normal;color:var(--brand);background:linear-gradient(180deg,transparent 62%,rgba(47,224,208,.45) 62%);}
.hero-sub{font-size:18px;font-weight:500;color:var(--muted);max-width:520px;}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin:22px 0 28px;}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;}
.hero-figure{position:relative;}
.hero-frame{
  position:relative;border-radius:var(--r-lg);overflow:hidden;
  background:#DCE6F6;box-shadow:0 22px 50px rgba(11,62,146,.18);
  border:1px solid rgba(255,255,255,.7);
}
.hero-frame img{width:100%;height:100%;object-fit:cover;aspect-ratio:4/3;}
.hero-float{
  position:absolute;background:#fff;border-radius:var(--r-sm);
  box-shadow:var(--sh-hover);border:1px solid var(--line);
  padding:10px 14px;font-size:13px;line-height:1.5;
}
.hero-float b{display:block;font-size:16px;color:var(--brand-deep);}
.hero-float span{color:var(--muted);font-size:12px;}
.float-a{left:-18px;top:32px;}
.float-b{right:-14px;top:45%;}
.float-c{left:24px;bottom:-18px;display:flex;align-items:center;gap:12px;}
.float-c .price{color:var(--accent);font-weight:800;font-size:18px;}
.hero-stats{
  margin-top:56px;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--sh-idle);display:grid;grid-template-columns:repeat(4,1fr);
  padding:26px 12px;position:relative;z-index:2;
}
.hero-stats .st{display:flex;align-items:center;gap:12px;justify-content:center;border-right:1px solid var(--line);}
.hero-stats .st:last-child{border-right:0;}
.st-ico{
  width:42px;height:42px;border-radius:50%;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;
  color:var(--brand);border:1px solid rgba(19,88,196,.25);background:rgba(19,88,196,.06);
}
.st-txt b{display:block;font-size:18px;font-weight:800;line-height:1.3;}
.st-txt span{font-size:13px;color:var(--muted);}

/* ---------- 板块标题 ---------- */
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:34px;}
.sec-head h2{font-size:26px;line-height:1.4;font-weight:800;}
.sec-head p{color:var(--muted);font-size:15px;margin-top:8px;}
.sec-more{color:var(--brand);font-weight:700;font-size:14px;display:inline-flex;align-items:center;gap:6px;white-space:nowrap;}
.sec-more:hover{color:var(--brand-deep);gap:10px;transition:gap .2s ease;}

/* ---------- 分类入口 ---------- */
.cat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.cat-card{
  display:block;background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  padding:24px 22px;box-shadow:var(--sh-idle);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.cat-card:hover{transform:translateY(-4px);box-shadow:var(--sh-hover);border-color:rgba(19,88,196,.35);}
.cat-ico{
  width:46px;height:46px;border-radius:14px;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,rgba(19,88,196,.12),rgba(47,224,208,.22));
  color:var(--brand-deep);font-size:18px;margin-bottom:16px;
}
.cat-card h3{font-size:17px;font-weight:700;margin-bottom:8px;}
.cat-card p{font-size:14px;color:var(--muted);line-height:1.7;min-height:48px;}
.cat-go{display:flex;align-items:center;gap:6px;color:var(--brand);font-size:14px;font-weight:700;margin-top:16px;}
.cat-card:hover .cat-go i{transform:translateX(4px);transition:transform .2s ease;}

/* ---------- 产品网格 ---------- */
.prod-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  box-shadow:var(--sh-idle);overflow:hidden;display:flex;flex-direction:column;
  transition:transform .2s ease,box-shadow .2s ease;
}
.card:hover{transform:translateY(-3px);box-shadow:var(--sh-hover);}
.card-media{position:relative;background:#E8EEF9;overflow:hidden;}
.card-media img{width:100%;height:100%;object-fit:cover;aspect-ratio:4/3;transition:transform .35s ease;}
.card:hover .card-media img{transform:scale-105;}
.card-media .badge{position:absolute;left:12px;top:12px;}
.card-body{padding:18px 20px 20px;display:flex;flex-direction:column;flex:1;}
.card-body h3{font-size:17px;font-weight:700;line-height:1.5;}
.card-body .desc{font-size:14px;color:var(--muted);margin-top:8px;}
.spec-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px;}
.spec-row span{font-size:12px;padding:5px 10px;border-radius:999px;background:#F1F5FC;color:var(--muted);border:1px solid var(--line);}
.price-row{display:flex;align-items:baseline;gap:10px;margin-top:16px;}
.price-row .now{font-size:20px;font-weight:800;color:var(--accent);}
.price-row .old{font-size:13px;color:#98A6B8;text-decoration:line-through;}
.card-foot{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:auto;padding-top:18px;}
.link-more{font-size:14px;font-weight:700;color:var(--brand);display:inline-flex;align-items:center;gap:5px;}
.link-more:hover{color:var(--brand-deep);}
.prod-lg{grid-column:span 2;grid-row:span 2;}
.prod-lg .card-media img{aspect-ratio:16/10;}
.prod-lg .card-body h3{font-size:22px;}
.prod-lg .card-body .desc{font-size:15px;}

/* ---------- CMS 最新信息 ---------- */
.news-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;
  box-shadow:var(--sh-idle);display:flex;flex-direction:column;
  transition:transform .2s ease,box-shadow .2s ease;
}
.news-card:hover{transform:translateY(-3px);box-shadow:var(--sh-hover);}
.news-media{background:#E8EEF9;overflow:hidden;}
.news-media img{width:100%;height:100%;object-fit:cover;aspect-ratio:4/3;transition:transform .35s ease;}
.news-card:hover .news-media img{transform:scale-105;}
.news-body{padding:16px 18px 20px;display:flex;flex-direction:column;flex:1;gap:10px;}
.clamp-2{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.clamp-3{display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;}
.news-body h3{font-size:17px;font-weight:700;line-height:1.55;}
.news-body h3 a:hover{color:var(--brand);}
.news-body .sum{font-size:14px;color:var(--muted);line-height:1.7;}
.news-meta{display:flex;align-items:center;justify-content:space-between;font-size:13px;color:#8695A8;margin-top:auto;padding-top:8px;border-top:1px dashed var(--line);}
.empty-state{
  min-height:180px;border:1px dashed #C9D6E8;border-radius:var(--r-md);background:#fff;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;
  color:var(--muted);font-size:14px;text-align:center;padding:32px;
}
.empty-state i{font-size:26px;color:#B6C5DA;}

/* ---------- 评价轮播 ---------- */
.snap-row{
  display:flex;gap:24px;overflow-x:auto;padding:6px 4px 22px;
  scroll-snap-type:x mandatory;-webkit-overflow-scrolling:touch;
}
.snap-row::-webkit-scrollbar{height:8px;}
.snap-row::-webkit-scrollbar-thumb{background:#C6D4E8;border-radius:999px;}
.snap-row::-webkit-scrollbar-track{background:transparent;}
.review-card{
  flex:0 0 calc((100% - 48px)/3);scroll-snap-align:start;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  padding:24px;box-shadow:var(--sh-idle);
}
.review-top{display:flex;align-items:center;gap:12px;margin-bottom:14px;}
.avatar{
  width:44px;height:44px;border-radius:50%;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;font-weight:800;font-size:16px;
  background:linear-gradient(135deg,rgba(19,88,196,.16),rgba(47,224,208,.28));color:var(--brand-deep);
}
.review-top .name{font-weight:700;font-size:15px;}
.review-top .role{font-size:12px;color:var(--muted);}
.stars{color:var(--accent);font-size:12px;letter-spacing:2px;}
.review-card blockquote{font-size:14px;color:#3C4A5E;line-height:1.8;}
.review-link{margin-top:16px;font-size:13px;color:var(--brand);font-weight:700;display:inline-flex;gap:6px;align-items:center;}
.carousel-ctrl{display:flex;gap:10px;}
.carousel-ctrl button{
  width:40px;height:40px;border-radius:50%;border:1px solid var(--line);background:#fff;color:var(--brand);
  display:flex;align-items:center;justify-content:center;transition:all .2s ease;
}
.carousel-ctrl button:hover{background:var(--brand);color:#fff;border-color:var(--brand);}

/* ---------- 保障条 ---------- */
.guard-strip{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--sh-idle);display:grid;grid-template-columns:repeat(4,1fr);
  padding:30px 20px;
}
.guard-item{display:flex;gap:14px;align-items:flex-start;padding:0 18px;border-right:1px solid var(--line);}
.guard-item:last-child{border-right:0;}
.guard-ico{
  width:44px;height:44px;border-radius:50%;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;
  background:rgba(47,224,208,.12);border:1px solid rgba(47,224,208,.45);color:#0d7a72;
}
.guard-item b{display:block;font-size:15px;font-weight:800;margin-bottom:2px;}
.guard-item span{font-size:13px;color:var(--muted);line-height:1.6;}

/* ---------- FAQ ---------- */
.faq-list{display:flex;flex-direction:column;gap:12px;}
details.faq{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  box-shadow:var(--sh-idle);overflow:hidden;transition:border-color .2s ease;
}
details.faq[open]{border-color:rgba(19,88,196,.35);}
details.faq summary{
  list-style:none;cursor:pointer;padding:18px 22px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  font-size:18px;font-weight:700;line-height:1.5;
}
details.faq summary::-webkit-details-marker{display:none;}
details.faq summary .plus{
  width:28px;height:28px;border-radius:50%;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;
  border:1px solid var(--line);color:var(--brand);font-size:13px;
  transition:transform .2s ease,background .2s ease,color .2s ease;
}
details.faq[open] summary .plus{transform:rotate(135deg);background:var(--brand);color:#fff;border-color:var(--brand);}
details.faq .faq-body{
  padding:16px 22px 20px;background:#F7FAFF;border-top:1px solid var(--line);
  font-size:15px;color:#3C4A5E;line-height:1.85;
}

/* ---------- CTA 暗色 ---------- */
.cta-dark{
  position:relative;overflow:hidden;border-radius:var(--r-lg);
  background:linear-gradient(135deg,#0A1424 0%,#0B2A55 100%);
  border:1px solid rgba(47,224,208,.4);
  box-shadow:0 0 32px rgba(47,224,208,.14);
  padding:44px 46px;display:grid;grid-template-columns:1.2fr 1fr auto;gap:32px;align-items:center;
}
.cta-dark::before{
  content:"";position:absolute;inset:0;
  background:url('/assets/images/backpic/back-3.webp') center/cover no-repeat;
  opacity:.16;
}
.cta-dark>*{position:relative;z-index:2;}
.cta-dark h2{color:#fff;font-size:26px;font-weight:800;line-height:1.4;}
.cta-dark p{color:rgba(248,250,255,.72);font-size:14px;margin-top:10px;line-height:1.75;}
.cta-dark .cta-btns{display:flex;gap:12px;flex-wrap:wrap;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--dark);color:rgba(248,250,255,.72);margin-top:var(--sec-gap);position:relative;}
.site-footer::before{content:"";display:block;height:1px;background:linear-gradient(90deg,transparent,rgba(47,224,208,.7),transparent);}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:36px;padding:56px 0 40px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-brand .logo-text{font-size:17px;}
.footer-about{font-size:14px;line-height:1.85;color:rgba(248,250,255,.6);}
.footer-col h4{color:#fff;font-size:15px;font-weight:700;margin-bottom:16px;}
.footer-col li{margin-bottom:10px;font-size:14px;}
.footer-col a{color:rgba(248,250,255,.68);transition:color .2s ease;}
.footer-col a:hover{color:var(--neon);}
.footer-col .plain{color:rgba(248,250,255,.6);}
.footer-contact li{display:flex;gap:10px;align-items:flex-start;font-size:14px;color:rgba(248,250,255,.68);}
.footer-contact i{color:var(--neon);margin-top:5px;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.08);padding:20px 0 26px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:rgba(248,250,255,.5);
}
.footer-bottom a{color:rgba(248,250,255,.6);}
.footer-bottom a:hover{color:var(--neon);}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  :root{--sec-gap:64px;}
  .nav-desktop{display:none;}
  .btn-nav{display:none;}
  .burger{display:flex;}
  .hero-grid{grid-template-columns:1fr;gap:36px;}
  .hero h1{font-size:32px;}
  .hero-stats{grid-template-columns:repeat(2,1fr);gap:20px 0;}
  .hero-stats .st:nth-child(2){border-right:0;}
  .hero-stats .st:nth-child(1),.hero-stats .st:nth-child(2){padding-bottom:8px;}
  .cat-grid{grid-template-columns:repeat(2,1fr);}
  .prod-grid{grid-template-columns:repeat(2,1fr);}
  .prod-lg{grid-column:span 2;grid-row:auto;}
  .review-card{flex:0 0 calc((100% - 24px)/2);}
  .guard-strip{grid-template-columns:repeat(2,1fr);gap:24px 0;}
  .guard-item:nth-child(2){border-right:0;}
  .cta-dark{grid-template-columns:1fr;padding:34px 28px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .carousel-ctrl{display:none;}
}
@media (max-width:640px){
  :root{--sec-gap:48px;}
  .container-x{padding:0 20px;}
  .notice-inner{justify-content:flex-start;text-align:left;font-size:12px;}
  .hero{padding-top:40px;}
  .hero h1{font-size:26px;line-height:1.35;}
  .hero-sub{font-size:16px;}
  .hero-stats{grid-template-columns:1fr;padding:20px;}
  .hero-stats .st{border-right:0;justify-content:flex-start;padding:10px 0;border-bottom:1px dashed var(--line);}
  .hero-stats .st:last-child{border-bottom:0;}
  .cat-grid{grid-template-columns:1fr;}
  .prod-grid{grid-template-columns:1fr;}
  .prod-lg{grid-column:span 1;}
  .review-card{flex:0 0 88%;}
  .guard-strip{grid-template-columns:1fr;padding:24px 20px;}
  .guard-item{border-right:0;padding:0;}
  .sec-head{flex-direction:column;align-items:flex-start;gap:12px;}
  .cta-dark{padding:28px 20px;}
  .footer-grid{grid-template-columns:1fr;padding:40px 0 28px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .float-a{left:6px;top:12px;}
  .float-b{right:8px;}
  .float-c{left:12px;bottom:-14px;}
}

/* roulang page: article */
:root{
    --brand:#1358C4;
    --brand-deep:#0B3E92;
    --accent:#FF6A2B;
    --neon:#2FE0D0;
    --bg:#F4F7FC;
    --surface:#FFFFFF;
    --line:#E3E9F2;
    --text:#16202E;
    --muted:#5A6B82;
    --invert:#F8FAFF;
    --r-lg:20px;
    --r-md:16px;
    --r-sm:10px;
    --r-img:14px;
    --shadow-1:0 6px 20px rgba(13,42,86,.07);
    --shadow-2:0 14px 34px rgba(13,42,86,.14);
    --font:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Noto Sans SC",sans-serif;
  }
  *,*::before,*::after{box-sizing:border-box;}
  html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
  body{
    margin:0;
    font-family:var(--font);
    font-size:16px;
    line-height:1.8;
    color:var(--text);
    background:var(--bg);
    font-variant-numeric:tabular-nums;
    -webkit-font-smoothing:antialiased;
  }
  a{color:inherit;text-decoration:none;}
  img{display:block;max-width:100%;height:auto;}
  button{font-family:inherit;font-size:inherit;cursor:pointer;border:0;background:none;color:inherit;}
  input,textarea{font-family:inherit;}
  ul,ol{margin:0;padding:0;list-style:none;}
  h1,h2,h3,h4,p{margin:0;}
  ::selection{background:rgba(47,224,208,.35);}

  .container-x{max-width:1200px;margin:0 auto;padding:0 32px;}

  /* ============ 顶部导航 ============ */
  .site-header{
    position:sticky;top:0;z-index:80;
    background:#0A1424;
    box-shadow:0 6px 24px rgba(6,18,36,.35);
  }
  .site-header::before{
    content:"";display:block;height:2px;width:100%;
    background:linear-gradient(90deg,var(--neon),var(--brand) 55%,var(--brand-deep));
  }
  .nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:24px;height:64px;}
  .logo{display:flex;align-items:center;gap:10px;color:var(--invert);font-weight:800;}
  .logo-mark{
    width:36px;height:36px;border-radius:10px;display:grid;place-items:center;
    background:linear-gradient(135deg,var(--brand),var(--neon));
    color:#04101f;font-size:16px;
    box-shadow:0 0 0 1px rgba(47,224,208,.35);
  }
  .logo-text{font-size:18px;letter-spacing:.4px;white-space:nowrap;}
  .logo-sub{
    display:inline-block;margin-left:6px;padding:1px 7px;border-radius:999px;
    font-size:11px;font-weight:600;color:var(--neon);
    border:1px solid rgba(47,224,208,.6);vertical-align:middle;
  }
  .nav-desktop{display:flex;align-items:center;gap:4px;}
  .nav-link{
    position:relative;padding:9px 13px;border-radius:8px;
    font-size:15px;color:#C9D6E8;transition:color .2s,background .2s;
  }
  .nav-link::after{
    content:"";position:absolute;left:13px;right:13px;bottom:3px;height:2px;
    border-radius:2px;background:var(--neon);opacity:0;transition:opacity .2s;
  }
  .nav-link:hover{color:#fff;background:rgba(47,224,208,.08);}
  .nav-link:hover::after{opacity:.55;}
  .nav-link.active{color:#fff;text-shadow:0 0 12px rgba(47,224,208,.6);}
  .nav-link.active::after{opacity:1;box-shadow:0 0 10px rgba(47,224,208,.85);}
  .nav-link:focus-visible,.logo:focus-visible,.btn-nav:focus-visible,.burger:focus-visible{
    outline:2px solid var(--neon);outline-offset:2px;
  }
  .nav-right{display:flex;align-items:center;gap:12px;}
  .btn-nav{
    display:inline-flex;align-items:center;gap:8px;
    padding:10px 16px;border-radius:var(--r-sm);
    background:var(--brand);color:#fff;font-size:14px;font-weight:600;
    transition:background .2s,box-shadow .2s,transform .2s;
  }
  .btn-nav:hover{background:#1a6ae0;box-shadow:0 0 0 3px rgba(47,224,208,.25);transform:translateY(-1px);}
  .burger{
    display:none;width:40px;height:40px;border-radius:10px;
    place-items:center;color:var(--invert);background:rgba(255,255,255,.06);
    border:1px solid rgba(47,224,208,.25);
  }
  .burger:hover{background:rgba(47,224,208,.14);}
  .mobile-drawer{
    display:none;flex-direction:column;background:#0A1424;
    border-top:1px solid rgba(47,224,208,.22);
  }
  .mobile-drawer.open{display:flex;animation:drawerIn .22s ease;}
  @keyframes drawerIn{from{opacity:0;transform:translateY(-6px);}to{opacity:1;transform:none;}}
  .mobile-drawer a{
    height:48px;display:flex;align-items:center;justify-content:space-between;
    padding:0 32px;color:#C9D6E8;font-size:15px;
    border-bottom:1px solid rgba(255,255,255,.06);
  }
  .mobile-drawer a:hover{color:#fff;background:rgba(47,224,208,.08);}
  .mobile-drawer a.active{color:var(--neon);}

  /* ============ 面包屑 ============ */
  .crumb-bar{background:#fff;border-bottom:1px solid var(--line);}
  .crumb-inner{display:flex;align-items:center;flex-wrap:wrap;gap:8px;padding:16px 0;font-size:13px;color:var(--muted);}
  .crumb-inner a{color:var(--muted);transition:color .2s;}
  .crumb-inner a:hover{color:var(--brand);}
  .crumb-sep{color:#B9C6D8;}
  .crumb-current{color:#8A99AE;}

  /* ============ 文章布局 ============ */
  .article-wrap{padding:40px 0 8px;}
  .article-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:36px;align-items:start;}
  .article-main{min-width:0;}

  .article-card{
    background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
    box-shadow:var(--shadow-1);padding:40px;
  }
  .badge-cat{
    display:inline-flex;align-items:center;gap:6px;
    padding:5px 13px;border-radius:999px;
    background:#E8F0FE;color:var(--brand);font-size:12px;font-weight:700;
  }
  .article-title{
    font-size:32px;line-height:1.38;font-weight:800;color:var(--text);
    margin:16px 0 16px;letter-spacing:-.2px;
  }
  .article-meta{
    display:flex;flex-wrap:wrap;gap:20px;
    padding-bottom:20px;border-bottom:1px solid var(--line);
    font-size:13px;color:var(--muted);
  }
  .article-meta span{display:inline-flex;align-items:center;gap:6px;}
  .article-meta i{color:#9FB0C6;}

  .article-body{margin-top:28px;font-size:16px;line-height:1.9;color:#22303F;word-break:break-word;}
  .article-body p{margin:0 0 1.2em;}
  .article-body h2{
    font-size:22px;font-weight:700;line-height:1.5;
    margin:40px 0 14px;padding-left:14px;border-left:4px solid var(--brand);
  }
  .article-body h3{font-size:18px;font-weight:700;margin:28px 0 10px;color:#1B2A3D;}
  .article-body h4{font-size:16px;font-weight:700;margin:22px 0 8px;}
  .article-body ul,.article-body ol{padding-left:22px;margin:0 0 1.2em;}
  .article-body ul{list-style:disc;}
  .article-body ol{list-style:decimal;}
  .article-body li{margin-bottom:8px;}
  .article-body ul>li::marker{color:var(--brand);}
  .article-body ol>li::marker{color:var(--brand);font-weight:700;}
  .article-body blockquote{
    background:#EFF5FF;border-left:4px solid var(--brand);
    border-radius:0 12px 12px 0;padding:16px 20px;margin:20px 0;color:#33475F;
  }
  .article-body img{border-radius:12px;margin:20px auto;box-shadow:var(--shadow-1);}
  .article-body figure{margin:20px 0;}
  .article-body figcaption{
    text-align:center;font-size:13px;color:#8A99AE;margin-top:10px;
  }
  .article-body table{width:100%;border-collapse:collapse;margin:20px 0;font-size:15px;}
  .article-body th{background:#EAF1FC;border:1px solid var(--line);padding:10px 12px;text-align:left;font-weight:700;}
  .article-body td{border:1px solid var(--line);padding:10px 12px;}
  .article-body a{color:var(--brand);text-decoration:underline;text-underline-offset:3px;}
  .article-body a:hover{color:var(--brand-deep);}
  .article-body hr{border:0;border-top:1px solid var(--line);margin:32px 0;}

  .empty-state{
    text-align:center;padding:64px 20px;border-radius:var(--r-md);
    background:#F8FAFE;border:1px dashed #CFDCEC;
  }
  .empty-state i{font-size:34px;color:#9FB0C6;}
  .empty-title{font-size:20px;font-weight:800;margin:16px 0 8px;}
  .empty-desc{color:var(--muted);font-size:15px;max-width:520px;margin:0 auto 22px;}

  .tag-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:34px;padding-top:24px;border-top:1px solid var(--line);}
  .tag-row .tag-label{font-size:13px;color:var(--muted);margin-right:2px;}
  .tag{
    display:inline-flex;align-items:center;padding:6px 13px;border-radius:999px;
    background:#F1F5FC;border:1px solid var(--line);color:#41546C;font-size:13px;
    transition:background .2s,color .2s,border-color .2s;
  }
  .tag:hover{background:#E8F0FE;color:var(--brand);border-color:#C6DBF8;}

  .post-nav{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:32px;}
  .post-nav-card{
    display:block;background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
    padding:20px 22px;box-shadow:var(--shadow-1);
    transition:box-shadow .25s,transform .25s,border-color .25s;
  }
  .post-nav-card:hover{box-shadow:var(--shadow-2);transform:translateY(-3px);border-color:#C6DBF8;}
  .post-nav-card .pn-label{font-size:12px;color:var(--muted);display:flex;align-items:center;gap:6px;}
  .post-nav-card .pn-title{display:block;font-size:16px;font-weight:700;margin-top:8px;line-height:1.5;}
  .post-nav-card .pn-desc{display:block;font-size:13px;color:var(--muted);margin-top:6px;}
  .post-nav-card.next{text-align:right;}
  .post-nav-card.next .pn-label{justify-content:flex-end;}

  .back-row{margin-top:26px;display:flex;}

  /* ============ 相关推荐 ============ */
  .section-block{margin-top:52px;}
  .section-head{display:flex;align-items:baseline;justify-content:space-between;gap:16px;margin-bottom:20px;}
  .section-title{font-size:22px;font-weight:800;position:relative;padding-left:14px;}
  .section-title::before{
    content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;
    border-radius:4px;background:linear-gradient(180deg,var(--brand),var(--neon));
  }
  .section-more{font-size:14px;color:var(--brand);font-weight:600;}
  .section-more:hover{color:var(--brand-deep);}

  .card-grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
  .info-card{
    display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);
    border-radius:var(--r-md);overflow:hidden;box-shadow:var(--shadow-1);
    transition:box-shadow .25s,transform .25s;
  }
  .info-card:hover{box-shadow:var(--shadow-2);transform:translateY(-3px);}
  .card-media{
    position:relative;aspect-ratio:4/3;background:#EAF1FC;overflow:hidden;
  }
  .card-media img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease;}
  .info-card:hover .card-media img{transform:scale-105;}
  .card-media .card-badge{
    position:absolute;left:12px;top:12px;padding:4px 10px;border-radius:999px;
    background:rgba(10,20,36,.78);color:var(--neon);font-size:12px;font-weight:600;
    backdrop-filter:blur(2px);
  }
  .card-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1;}
  .card-title{font-size:17px;font-weight:700;line-height:1.5;}
  .card-text{font-size:14px;color:var(--muted);line-height:1.75;}
  .card-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--muted);}
  .card-foot .link-more{color:var(--brand);font-weight:600;}

  /* ============ 侧栏 ============ */
  .sidebar{display:flex;flex-direction:column;gap:20px;}
  .side-card{
    background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
    padding:20px;box-shadow:var(--shadow-1);
  }
  .side-card h3{
    font-size:16px;font-weight:800;margin-bottom:14px;padding-left:10px;
    border-left:3px solid var(--brand);line-height:1.4;
  }
  .rank-list li{border-bottom:1px dashed var(--line);}
  .rank-list li:last-child{border-bottom:0;}
  .rank-list a{display:flex;gap:10px;align-items:flex-start;padding:10px 0;font-size:14px;line-height:1.6;transition:color .2s;}
  .rank-list a:hover{color:var(--brand);}
  .rank-num{
    flex:0 0 22px;width:22px;height:22px;border-radius:6px;display:grid;place-items:center;
    background:#EAF1FC;color:var(--brand);font-size:12px;font-weight:700;margin-top:2px;
  }
  .rank-list li:nth-child(-n+3) .rank-num{background:var(--brand);color:#fff;}
  .side-links li a{
    display:flex;align-items:center;justify-content:space-between;
    padding:11px 14px;border-radius:var(--r-sm);background:#F7FAFF;
    border:1px solid var(--line);font-size:14px;margin-bottom:10px;
    transition:background .2s,border-color .2s,color .2s,transform .2s;
  }
  .side-links li:last-child a{margin-bottom:0;}
  .side-links li a:hover{background:#EAF1FC;border-color:#C6DBF8;color:var(--brand);transform:translateX(3px);}
  .side-cta{
    background:#0A1424;border:1px solid rgba(47,224,208,.35);border-radius:var(--r-md);
    padding:22px;color:var(--invert);
  }
  .side-cta h3{font-size:16px;font-weight:800;margin-bottom:8px;}
  .side-cta p{font-size:13.5px;color:#B7C6DA;line-height:1.7;margin-bottom:16px;}

  /* ============ 按钮 ============ */
  .btn-primary{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    padding:12px 22px;border-radius:var(--r-sm);
    background:var(--brand);color:#fff;font-size:15px;font-weight:600;
    transition:background .2s,transform .2s,box-shadow .2s;
  }
  .btn-primary:hover{background:#1a6ae0;transform:translateY(-1px);box-shadow:0 0 0 3px rgba(47,224,208,.22);}
  .btn-ghost{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    padding:11px 21px;border-radius:var(--r-sm);
    border:1px solid var(--brand);color:var(--brand);font-size:15px;font-weight:600;
    transition:background .2s,transform .2s;
    background:transparent;
  }
  .btn-ghost:hover{background:rgba(19,88,196,.08);transform:translateY(-1px);}
  .btn-neon{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    padding:12px 22px;border-radius:var(--r-sm);
    border:1px solid rgba(47,224,208,.7);color:var(--neon);font-weight:600;font-size:15px;
    background:rgba(47,224,208,.06);
    transition:background .2s,box-shadow .2s,transform .2s;
  }
  .btn-neon:hover{background:rgba(47,224,208,.16);box-shadow:0 0 18px rgba(47,224,208,.3);transform:translateY(-1px);}
  .btn-primary:focus-visible,.btn-ghost:focus-visible,.btn-neon:focus-visible{outline:2px solid var(--neon);outline-offset:2px;}

  /* ============ 深色 CTA ============ */
  .cta-band{
    margin-top:64px;background:#0A1424;
    border:1px solid rgba(47,224,208,.35);border-radius:var(--r-lg);
    padding:40px;display:grid;grid-template-columns:1.3fr 1fr auto;gap:28px;align-items:center;
    color:var(--invert);box-shadow:0 18px 40px rgba(9,20,38,.28);
  }
  .cta-band h2{font-size:24px;font-weight:800;line-height:1.5;}
  .cta-band p{font-size:14.5px;color:#B7C6DA;margin-top:10px;line-height:1.8;}
  .cta-band .cta-actions{display:flex;gap:12px;flex-wrap:wrap;}

  /* ============ 页脚 ============ */
  .site-footer{
    margin-top:72px;background:#0A1424;color:var(--invert);
    border-top:1px solid rgba(47,224,208,.45);
  }
  .footer-grid{
    display:grid;grid-template-columns:1.7fr 1fr 1fr 1.3fr;gap:32px;
    padding:56px 0 34px;
  }
  .footer-brand{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:800;margin-bottom:14px;}
  .footer-about{font-size:14px;color:#A9B8CC;line-height:1.85;max-width:420px;}
  .footer-col h4{font-size:15px;font-weight:700;margin-bottom:16px;color:#fff;}
  .footer-col ul li{margin-bottom:11px;}
  .footer-col ul li a{font-size:14px;color:#A9B8CC;transition:color .2s;display:inline-flex;align-items:center;gap:6px;}
  .footer-col ul li a:hover{color:var(--neon);}
  .footer-contact li{display:flex;gap:10px;font-size:14px;color:#A9B8CC;line-height:1.7;margin-bottom:12px;}
  .footer-contact i{color:var(--neon);margin-top:5px;}
  .footer-bottom{
    display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
    border-top:1px solid rgba(255,255,255,.08);
    padding:20px 0 28px;font-size:13px;color:#8FA0B7;
  }

  /* ============ 响应式 ============ */
  @media (max-width:1100px){
    .article-layout{grid-template-columns:minmax(0,1fr) 280px;gap:26px;}
    .cta-band{grid-template-columns:1fr;gap:20px;}
  }
  @media (max-width:1023px){
    .nav-desktop{display:none;}
    .burger{display:grid;}
    .article-layout{grid-template-columns:1fr;}
    .sidebar{margin-top:8px;}
    .card-grid-3{grid-template-columns:repeat(2,minmax(0,1fr));}
    .footer-grid{grid-template-columns:1fr 1fr;}
  }
  @media (max-width:767px){
    .container-x{padding:0 20px;}
    .article-wrap{padding:28px 0 8px;}
    .article-card{padding:26px 20px;border-radius:var(--r-md);}
    .article-title{font-size:26px;line-height:1.42;}
    .article-body h2{font-size:20px;margin-top:32px;}
    .section-block{margin-top:40px;}
    .post-nav{grid-template-columns:1fr;}
    .post-nav-card.next{text-align:left;}
    .post-nav-card.next .pn-label{justify-content:flex-start;}
    .card-grid-3{grid-template-columns:1fr;}
    .cta-band{padding:28px 22px;border-radius:var(--r-md);}
    .cta-band h2{font-size:20px;}
    .footer-grid{grid-template-columns:1fr;gap:26px;padding:40px 0 24px;}
    .footer-bottom{flex-direction:column;gap:6px;}
    .mobile-drawer a{padding:0 20px;}
  }
  @media (max-width:560px){
    .btn-nav{display:none;}
    .logo-text{font-size:16px;}
    .article-meta{gap:12px 16px;}
  }

/* roulang page: category1 */
:root{
  --brand:#1358C4;
  --brand-deep:#0B3E92;
  --accent:#FF6A2B;
  --neon:#2FE0D0;
  --bg:#F4F7FC;
  --surface:#FFFFFF;
  --line:#E3E9F2;
  --ink:#16202E;
  --ink-2:#5A6B82;
  --ink-3:#8C9BB2;
  --dark:#0A1424;
  --radius-lg:20px;
  --radius-md:16px;
  --radius-sm:10px;
  --shadow-1:0 6px 20px rgba(13,42,86,.07);
  --shadow-2:0 14px 34px rgba(13,42,86,.14);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Noto Sans SC",sans-serif;
  background:var(--bg);
  color:var(--ink);
  font-size:16px;
  line-height:1.8;
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit}
ul,ol{margin:0;padding:0;list-style:none}
p{margin:0}
:focus-visible{outline:2px solid var(--neon);outline-offset:2px}
.container-x{max-width:1200px;margin:0 auto;padding:0 32px;width:100%}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:60;background:var(--dark)}
.site-header::before{content:"";display:block;height:2px;background:linear-gradient(90deg,var(--neon),var(--brand) 70%,transparent)}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:24px;height:64px}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo-mark{width:34px;height:34px;border-radius:10px;display:grid;place-items:center;background:linear-gradient(135deg,var(--brand),var(--neon));color:#04121F;font-size:15px}
.logo-text{display:flex;align-items:center;gap:6px;color:#F8FAFF;font-size:17px;font-weight:800;letter-spacing:.2px}
.logo-sub{font-size:11px;font-weight:600;padding:2px 7px;border-radius:999px;background:rgba(47,224,208,.14);color:var(--neon);border:1px solid rgba(47,224,208,.35)}
.nav-desktop{display:flex;align-items:center;gap:2px}
.nav-link{position:relative;padding:10px 12px;font-size:15px;font-weight:500;color:#C7D3E6;transition:color .2s ease}
.nav-link::after{content:"";position:absolute;left:12px;right:12px;bottom:4px;height:2px;border-radius:2px;background:var(--neon);transform:scaleX(0);transform-origin:left;transition:transform .25s ease}
.nav-link:hover{color:#FFFFFF}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.active{color:#FFFFFF;text-shadow:0 0 10px rgba(47,224,208,.55)}
.nav-link.active::after{transform:scaleX(1)}
.nav-right{display:flex;align-items:center;gap:12px}
.btn-nav{display:inline-flex;align-items:center;gap:8px;background:var(--brand);color:#FFFFFF;padding:10px 16px;border-radius:var(--radius-sm);font-size:14px;font-weight:600;transition:all .2s ease}
.btn-nav:hover{background:#1a6ae0;transform:translateY(-1px);box-shadow:0 0 0 3px rgba(47,224,208,.18)}
.burger{display:none;width:40px;height:40px;border-radius:var(--radius-sm);border:1px solid rgba(255,255,255,.18);background:rgba(255,255,255,.06);color:#FFFFFF;cursor:pointer;align-items:center;justify-content:center;transition:background .2s ease}
.burger:hover{background:rgba(47,224,208,.14)}
.mobile-drawer{display:none;flex-direction:column;background:var(--dark);border-top:1px solid rgba(255,255,255,.08);padding-bottom:12px}
.mobile-drawer.open{display:flex}
.mobile-drawer a{display:flex;align-items:center;justify-content:space-between;height:48px;padding:0 32px;color:#C7D3E6;font-size:15px;border-bottom:1px solid rgba(255,255,255,.05);transition:all .2s ease}
.mobile-drawer a:hover{color:#FFFFFF;background:rgba(47,224,208,.06)}
.mobile-drawer a.active{color:var(--neon)}
.mobile-drawer a i{font-size:12px;opacity:.6}

/* ---------- hero ---------- */
.page-hero{padding:32px 0 0}
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:rgba(248,250,255,.62);margin-bottom:18px;flex-wrap:wrap}
.crumb a{color:rgba(248,250,255,.62);transition:color .2s ease}
.crumb a:hover{color:var(--neon)}
.crumb span.sep{opacity:.45}
.crumb .current{color:#FFFFFF}
.hero-panel{position:relative;overflow:hidden;border-radius:var(--radius-lg);background:var(--dark);box-shadow:var(--shadow-1)}
.hero-panel-bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:.36}
.hero-panel::after{content:"";position:absolute;inset:0;background:linear-gradient(100deg,rgba(10,20,36,.95) 0%,rgba(10,20,36,.78) 48%,rgba(10,20,36,.34) 100%)}
.hero-panel-inner{position:relative;z-index:2;padding:56px 48px 48px;max-width:800px}
.hero-panel h1{font-size:34px;line-height:1.4;font-weight:800;color:#FFFFFF;margin:16px 0 16px}
.hero-desc{font-size:16px;line-height:1.9;color:#B7C4D8;max-width:680px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin:22px 0 26px}
.tag-neon{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:600;color:#CFFAF3;background:rgba(47,224,208,.10);border:1px solid rgba(47,224,208,.4);padding:6px 12px;border-radius:999px}
.badge-soft{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:600;color:var(--brand-deep);background:#E7F0FE;border:1px solid #D3E3FB;padding:5px 12px;border-radius:999px}
.badge-accent{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:700;color:#FFFFFF;background:var(--accent);padding:4px 10px;border-radius:999px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px}
.hero-stats{position:relative;z-index:2;display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:rgba(255,255,255,.1);border-top:1px solid rgba(255,255,255,.1)}
.hero-stats>div{background:rgba(9,18,32,.7);padding:18px 24px}
.hero-stats strong{display:block;font-size:22px;font-weight:800;color:#FFFFFF;line-height:1.4}
.hero-stats span{font-size:13px;color:#9FB0C8}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-size:15px;font-weight:600;padding:12px 22px;border-radius:var(--radius-sm);border:1px solid transparent;cursor:pointer;transition:all .2s ease}
.btn-primary{background:var(--brand);color:#FFFFFF}
.btn-primary:hover{background:#1a6ae0;transform:translateY(-1px);box-shadow:0 10px 24px rgba(19,88,196,.32)}
.btn-accent{background:var(--accent);color:#FFFFFF}
.btn-accent:hover{background:#ef5a19;transform:translateY(-1px);box-shadow:0 10px 24px rgba(255,106,43,.3)}
.btn-outline{background:#FFFFFF;border-color:var(--brand);color:var(--brand)}
.btn-outline:hover{background:rgba(19,88,196,.08)}
.btn-ghost-light{background:rgba(255,255,255,.07);border-color:rgba(255,255,255,.4);color:#FFFFFF}
.btn-ghost-light:hover{background:rgba(255,255,255,.16)}
.btn-neon{background:rgba(47,224,208,.12);border-color:rgba(47,224,208,.55);color:#D6FBF5}
.btn-neon:hover{background:rgba(47,224,208,.22);transform:translateY(-1px)}
.btn:active{transform:translateY(0)}

/* ---------- sections ---------- */
.section{padding:88px 0}
.section-tight{padding:64px 0}
.section-alt{background:#FFFFFF}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:36px}
.section-title{font-size:26px;line-height:1.4;font-weight:800;color:var(--ink);margin:0 0 8px}
.section-sub{font-size:15px;color:var(--ink-2);max-width:720px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;color:var(--brand);margin-bottom:10px}
.eyebrow::before{content:"";width:18px;height:3px;border-radius:2px;background:var(--accent)}
.link-more{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand);transition:all .2s ease}
.link-more:hover{color:var(--accent);gap:10px}

/* ---------- cards ---------- */
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-md);box-shadow:var(--shadow-1);transition:all .25s ease;overflow:hidden}
.card:hover{box-shadow:var(--shadow-2);transform:translateY(-3px)}
.card-media{aspect-ratio:4/3;background:#EEF3FA;border-radius:14px;overflow:hidden;margin:14px 14px 0}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.card:hover .card-media img{transform:scale(1.05)}
.card-body{padding:18px 20px 22px}
.card-title{font-size:17px;font-weight:700;color:var(--ink);line-height:1.5;margin:0 0 8px}
.card-desc{font-size:14px;color:var(--ink-2);line-height:1.8}
.card-tags{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0 0}
.chip{font-size:12px;font-weight:600;color:var(--brand-deep);background:#EAF1FE;border-radius:999px;padding:4px 10px}
.card-foot{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:18px}
.card-link{font-size:14px;font-weight:600;color:var(--brand);display:inline-flex;align-items:center;gap:6px;transition:all .2s ease}
.card-link:hover{color:var(--accent);gap:10px}

/* ---------- intro split ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.split-media{border-radius:var(--radius-lg);overflow:hidden;background:#EEF3FA;border:1px solid var(--line);box-shadow:var(--shadow-1)}
.split-media img{width:100%;height:100%;object-fit:cover;aspect-ratio:4/3}
.check-list{display:grid;gap:14px;margin-top:24px}
.check-list li{display:flex;gap:12px;align-items:flex-start;font-size:15px;color:var(--ink-2)}
.check-list i{color:var(--brand);margin-top:7px;font-size:13px;flex-shrink:0}
.check-list strong{color:var(--ink);font-weight:700}

/* ---------- spec grid ---------- */
.spec-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.spec-card{display:flex;gap:16px;padding:24px;background:#FFFFFF;border:1px solid var(--line);border-radius:var(--radius-md);box-shadow:var(--shadow-1);transition:all .25s ease}
.spec-card:hover{box-shadow:var(--shadow-2);transform:translateY(-3px)}
.spec-icon{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;background:#EAF1FE;color:var(--brand);font-size:17px;flex-shrink:0}
.spec-card h3{font-size:17px;font-weight:700;margin:0 0 6px;color:var(--ink)}
.spec-card p{font-size:14px;color:var(--ink-2);line-height:1.85}

/* ---------- feature strip ---------- */
.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.feature-item{background:#FFFFFF;border:1px solid var(--line);border-radius:var(--radius-md);padding:24px;box-shadow:var(--shadow-1);transition:all .25s ease}
.feature-item:hover{transform:translateY(-3px);box-shadow:var(--shadow-2)}
.feature-item h3{font-size:16px;font-weight:700;margin:14px 0 6px}
.feature-item p{font-size:14px;color:var(--ink-2);line-height:1.8}
.feature-icon{width:42px;height:42px;border-radius:12px;display:grid;place-items:center;background:linear-gradient(135deg,rgba(19,88,196,.12),rgba(47,224,208,.2));color:var(--brand);font-size:16px}

/* ---------- flow ---------- */
.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.flow-step{position:relative;background:#FFFFFF;border:1px solid var(--line);border-radius:var(--radius-md);padding:26px 22px;box-shadow:var(--shadow-1);transition:all .25s ease}
.flow-step:hover{transform:translateY(-3px);box-shadow:var(--shadow-2)}
.flow-num{width:34px;height:34px;border-radius:999px;background:var(--brand);color:#FFFFFF;display:grid;place-items:center;font-weight:800;font-size:14px;margin-bottom:14px}
.flow-step h3{font-size:16px;font-weight:700;margin:0 0 8px}
.flow-step p{font-size:14px;color:var(--ink-2);line-height:1.8}

/* ---------- FAQ ---------- */
.faq-list{display:grid;gap:12px;max-width:900px}
.faq-item{border:1px solid var(--line);border-radius:14px;background:#FFFFFF;overflow:hidden;box-shadow:var(--shadow-1)}
.faq-item summary{list-style:none;cursor:pointer;padding:18px 22px;font-size:17px;font-weight:700;color:var(--ink);display:flex;align-items:center;justify-content:space-between;gap:16px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";font-size:22px;font-weight:600;color:var(--brand);transition:transform .2s ease;line-height:1}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-body{padding:0 22px 20px;font-size:15px;color:var(--ink-2);line-height:1.9;background:#F7FAFF;transition:background .2s ease}
.faq-body p{padding-top:4px}

/* ---------- CTA ---------- */
.cta-band{position:relative;overflow:hidden;background:var(--dark);border:1px solid rgba(47,224,208,.35);border-radius:var(--radius-lg);box-shadow:0 18px 40px rgba(10,20,36,.28)}
.cta-band::before{content:"";position:absolute;top:0;left:0;right:0;height:2px;background:linear-gradient(90deg,transparent,var(--neon),transparent)}
.cta-inner{position:relative;z-index:2;padding:48px;display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}
.cta-inner h2{font-size:26px;font-weight:800;color:#FFFFFF;margin:0 0 10px;line-height:1.4}
.cta-inner p{font-size:15px;color:#A9B9CF;max-width:620px;line-height:1.9}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}

/* ---------- footer ---------- */
.site-footer{position:relative;background:var(--dark);color:#C7D3E6;margin-top:0}
.site-footer::before{content:"";position:absolute;top:0;left:0;right:0;height:1px;background:var(--neon);opacity:.7}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:40px;padding:64px 0 40px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .logo-text{font-size:16px}
.footer-about{font-size:14px;line-height:1.9;color:#94A5BD;margin:0}
.footer-col h4{color:#FFFFFF;font-size:15px;font-weight:700;margin:0 0 16px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{font-size:14px;color:#94A5BD;transition:color .2s ease}
.footer-col a:hover{color:var(--neon)}
.footer-contact li{display:flex;gap:10px;font-size:14px;color:#94A5BD;line-height:1.7}
.footer-contact i{margin-top:6px;color:var(--neon);flex-shrink:0}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding:20px 0 28px;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:13px;color:#7C8CA6}

/* ---------- responsive ---------- */
@media (max-width:1023px){
  .nav-desktop{display:none}
  .burger{display:flex}
  .btn-nav{display:none}
  .split{grid-template-columns:1fr;gap:32px}
  .feature-grid{grid-template-columns:repeat(2,1fr)}
  .flow{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .hero-panel-inner{padding:44px 32px 36px}
}
@media (max-width:767px){
  .section{padding:56px 0}
  .section-tight{padding:44px 0}
  .spec-grid{grid-template-columns:1fr}
  .hero-panel h1{font-size:26px}
  .section-title{font-size:22px}
  .cta-inner{padding:32px 24px}
  .cta-inner h2{font-size:22px}
}
@media (max-width:640px){
  .container-x{padding:0 20px}
  .mobile-drawer a{padding:0 20px}
  .hero-stats{grid-template-columns:repeat(2,1fr)}
  .hero-panel-inner{padding:32px 22px 28px}
  .feature-grid{grid-template-columns:1fr}
  .flow{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .hero-actions .btn{width:100%}
}

/* roulang page: category2 */
:root{
  --brand:#1358C4;
  --brand-deep:#0B3E92;
  --accent:#FF6A2B;
  --neon:#2FE0D0;
  --bg:#F4F7FC;
  --surface:#FFFFFF;
  --line:#E3E9F2;
  --text:#16202E;
  --muted:#5A6B82;
  --invert:#F8FAFF;
  --dark:#0A1424;
  --r-lg:20px;
  --r-md:16px;
  --r-sm:10px;
  --r-img:14px;
  --shadow:0 6px 20px rgba(13,42,86,.07);
  --shadow-hover:0 14px 34px rgba(13,42,86,.14);
  --nav-h:64px;
  --sec-y:88px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Noto Sans SC",sans-serif;
  background:var(--bg);
  color:var(--text);
  font-size:16px;
  line-height:1.8;
  font-variant-numeric:tabular-nums;
}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;transition:color .2s ease,background-color .2s ease,border-color .2s ease,opacity .2s ease;}
button,input,select,textarea{font:inherit;color:inherit;}
button{cursor:pointer;border:0;background:none;}
h1,h2,h3,h4{margin:0;font-weight:800;line-height:1.35;letter-spacing:0;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--neon);outline-offset:2px;}

.container-x{max-width:1200px;margin:0 auto;padding:0 32px;}
.section{padding:var(--sec-y) 0;}
.section-tight{padding:56px 0;}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:60;background:var(--dark);color:var(--invert);}
.site-header::before{content:"";display:block;height:2px;width:100%;background:linear-gradient(90deg,var(--neon),var(--brand) 55%,#7C4DFF);}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:24px;height:var(--nav-h);}
.logo{display:flex;align-items:center;gap:10px;color:var(--invert);font-weight:800;font-size:18px;white-space:nowrap;}
.logo-mark{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:10px;background:linear-gradient(135deg,var(--brand),var(--neon));color:#04121f;font-size:15px;box-shadow:0 0 14px rgba(47,224,208,.35);}
.logo-text{display:inline-flex;align-items:baseline;gap:6px;}
.logo-sub{font-size:12px;font-weight:600;color:var(--neon);letter-spacing:1px;}
.nav-desktop{display:flex;align-items:center;gap:4px;}
.nav-link{position:relative;display:inline-block;padding:8px 14px;border-radius:8px;font-size:15px;color:#C7D3E6;}
.nav-link::after{content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;border-radius:2px;background:var(--neon);transform:scaleX(0);transform-origin:left;transition:transform .22s ease;}
.nav-link:hover{color:#fff;background:rgba(47,224,208,.08);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.active{color:#fff;text-shadow:0 0 10px rgba(47,224,208,.55);}
.nav-link.active::after{transform:scaleX(1);}
.nav-right{display:flex;align-items:center;gap:12px;}
.btn-nav{display:inline-flex;align-items:center;gap:7px;height:40px;padding:0 18px;border-radius:var(--r-sm);background:var(--brand);color:#fff;font-size:14px;font-weight:700;transition:background-color .2s ease,box-shadow .2s ease,transform .2s ease;}
.btn-nav:hover{background:#1C6AD8;box-shadow:0 0 0 1px rgba(47,224,208,.6),0 0 18px rgba(47,224,208,.35);transform:translateY(-1px);}
.burger{display:none;width:42px;height:42px;border-radius:10px;border:1px solid rgba(47,224,208,.35);color:var(--invert);font-size:17px;}
.burger:hover{background:rgba(47,224,208,.12);}
.mobile-drawer{display:none;overflow:hidden;border-top:1px solid rgba(255,255,255,.08);background:var(--dark);}
.mobile-drawer.open{display:block;}
.mobile-drawer a{display:flex;align-items:center;justify-content:space-between;height:48px;padding:0 32px;font-size:15px;color:#C7D3E6;border-bottom:1px solid rgba(255,255,255,.06);}
.mobile-drawer a.active,.mobile-drawer a:hover{color:var(--neon);background:rgba(47,224,208,.07);}

/* ---------- breadcrumb & page hero ---------- */
.page-hero{position:relative;background:var(--dark);color:var(--invert);overflow:hidden;}
.page-hero .hero-bg{position:absolute;inset:0;background-image:url('/assets/images/backpic/back-2.png');background-size:cover;background-position:center;opacity:.34;}
.page-hero .hero-mask{position:absolute;inset:0;background:linear-gradient(100deg,rgba(10,20,36,.96) 0%,rgba(10,20,36,.82) 52%,rgba(11,62,146,.7) 100%);}
.hero-inner{position:relative;display:grid;grid-template-columns:1.25fr .75fr;gap:48px;align-items:center;padding:64px 0 72px;}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:#93A4BE;margin-bottom:18px;}
.breadcrumb a:hover{color:var(--neon);}
.breadcrumb .sep{opacity:.55;}
.breadcrumb .current{color:#C7D3E6;}
.hero-tagline{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;border:1px solid rgba(47,224,208,.45);background:rgba(47,224,208,.1);color:var(--neon);font-size:13px;font-weight:600;margin-bottom:18px;}
.page-hero h1{font-size:34px;line-height:1.3;font-weight:800;color:#fff;max-width:760px;}
.page-hero h1 em{font-style:normal;color:var(--neon);}
.hero-lead{margin-top:16px;font-size:16px;line-height:1.9;color:#BFCCE0;max-width:680px;}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px;}
.hero-tag{padding:6px 13px;border-radius:999px;background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.14);font-size:13px;color:#DCE6F5;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px;}
.hero-media{position:relative;border-radius:var(--r-lg);overflow:hidden;border:1px solid rgba(47,224,208,.3);box-shadow:0 18px 42px rgba(0,0,0,.4);background:#0E1B2E;aspect-ratio:4/3;}
.hero-media img{width:100%;height:100%;object-fit:cover;}
.hero-media .media-caption{position:absolute;left:14px;right:14px;bottom:14px;padding:12px 14px;border-radius:12px;background:rgba(6,14,26,.78);border:1px solid rgba(47,224,208,.28);font-size:13px;color:#D7E3F4;backdrop-filter:blur(4px);}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:46px;padding:0 24px;border-radius:var(--r-sm);font-size:15px;font-weight:700;transition:all .2s ease;}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 6px 18px rgba(19,88,196,.28);}
.btn-primary:hover{background:#1C6AD8;transform:translateY(-1px);box-shadow:0 12px 26px rgba(19,88,196,.34);}
.btn-ghost{border:1px solid rgba(47,224,208,.55);color:var(--neon);background:rgba(47,224,208,.06);}
.btn-ghost:hover{background:rgba(47,224,208,.16);}
.btn-outline-light{border:1px solid rgba(255,255,255,.4);color:#fff;}
.btn-outline-light:hover{border-color:var(--neon);color:var(--neon);}
.btn-outline{border:1px solid var(--brand);color:var(--brand);background:#fff;}
.btn-outline:hover{background:rgba(19,88,196,.08);}
.btn-sm{height:38px;padding:0 16px;font-size:14px;}

/* ---------- section heads ---------- */
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:32px;}
.sec-eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;color:var(--brand);margin-bottom:10px;}
.sec-eyebrow::before{content:"";width:22px;height:2px;border-radius:2px;background:var(--accent);}
.sec-title{font-size:26px;color:var(--text);}
.sec-sub{margin-top:10px;font-size:15px;color:var(--muted);max-width:720px;}
.link-more{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:700;color:var(--brand);}
.link-more:hover{color:var(--brand-deep);gap:10px;}

/* ---------- filter chips ---------- */
.filter-bar{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:24px;}
.filter-chip{display:inline-flex;align-items:center;gap:8px;height:40px;padding:0 18px;border-radius:999px;border:1px solid var(--line);background:#fff;color:var(--muted);font-size:14px;font-weight:600;box-shadow:var(--shadow);transition:all .2s ease;}
.filter-chip:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-1px);}
.filter-chip.active{background:var(--brand);border-color:var(--brand);color:#fff;box-shadow:0 8px 20px rgba(19,88,196,.26);}
.filter-chip i{font-size:13px;}
.filter-note{font-size:13px;color:var(--muted);margin-bottom:20px;}

/* ---------- spec table ---------- */
.table-shell{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--shadow);overflow:hidden;}
.table-scroll{overflow-x:auto;}
.spec-table{width:100%;border-collapse:collapse;min-width:920px;}
.spec-table thead th{background:#EAF2FE;color:var(--brand-deep);font-size:14px;font-weight:800;text-align:left;padding:16px 18px;white-space:nowrap;border-bottom:1px solid var(--line);}
.spec-table tbody td{padding:16px 18px;font-size:14.5px;color:var(--text);border-bottom:1px solid var(--line);vertical-align:middle;}
.spec-table tbody tr{transition:background-color .18s ease;}
.spec-table tbody tr:hover{background:#F7FAFF;}
.spec-table tbody tr.is-hidden{display:none;}
.spec-name{font-weight:700;color:var(--text);}
.spec-code{font-size:12.5px;color:var(--muted);margin-top:2px;}
.cell-strong{color:var(--accent);font-weight:800;}
.tag{display:inline-flex;align-items:center;padding:4px 11px;border-radius:999px;font-size:12px;font-weight:700;line-height:1.6;}
.tag-blue{background:#E6EFFC;color:var(--brand-deep);}
.tag-accent{background:var(--accent);color:#fff;}
.tag-soft{background:#EAF9F7;color:#0E7A70;}
.table-foot{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;padding:16px 18px;background:#FBFCFF;font-size:13px;color:var(--muted);border-top:1px solid var(--line);}

/* ---------- cards ---------- */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.card{display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--shadow);overflow:hidden;transition:transform .24s ease,box-shadow .24s ease;}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);}
.card-media{position:relative;aspect-ratio:4/3;background:#E9EFF8;overflow:hidden;}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease;}
.card:hover .card-media img{transform:scale-1.05;}
.card-media .badge-float{position:absolute;top:12px;left:12px;}
.card-body{padding:20px 20px 22px;display:flex;flex-direction:column;gap:12px;flex:1;}
.card-title{font-size:17px;font-weight:800;color:var(--text);}
.card-desc{font-size:14px;color:var(--muted);line-height:1.75;}
.card-meta{display:flex;flex-wrap:wrap;gap:8px;}
.card-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;padding-top:10px;border-top:1px solid var(--line);}
.price{color:var(--accent);font-weight:800;font-size:17px;}
.price small{font-size:12px;color:var(--muted);font-weight:600;margin-left:4px;}

/* ---------- feature list ---------- */
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center;}
.split-media{position:relative;border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow);aspect-ratio:4/3;background:#E9EFF8;}
.split-media img{width:100%;height:100%;object-fit:cover;}
.check-list{display:grid;gap:14px;margin-top:22px;}
.check-item{display:flex;gap:12px;align-items:flex-start;background:#fff;border:1px solid var(--line);border-radius:var(--r-md);padding:16px 18px;box-shadow:var(--shadow);}
.check-item i{color:var(--brand);font-size:16px;margin-top:4px;}
.check-item h3{font-size:16px;font-weight:800;margin-bottom:4px;}
.check-item p{font-size:14px;color:var(--muted);}

/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.step{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--r-md);padding:24px 22px;box-shadow:var(--shadow);transition:transform .24s ease,box-shadow .24s ease;}
.step:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);}
.step-num{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:999px;background:#E6EFFC;color:var(--brand-deep);font-weight:800;font-size:15px;margin-bottom:14px;}
.step h3{font-size:16.5px;font-weight:800;margin-bottom:8px;}
.step p{font-size:14px;color:var(--muted);}

/* ---------- faq ---------- */
.faq-list{display:grid;gap:12px;}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--shadow);overflow:hidden;transition:box-shadow .2s ease;}
.faq-item[open]{box-shadow:var(--shadow-hover);}
.faq-item summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 22px;font-size:17px;font-weight:800;color:var(--text);}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary .faq-icon{flex:none;display:inline-flex;align-items:center;justify-content:center;width:28px;height:28px;border-radius:999px;border:1px solid var(--line);color:var(--brand);transition:transform .22s ease,background-color .22s ease;font-size:12px;}
.faq-item[open] summary .faq-icon{transform:rotate(45deg);background:#E6EFFC;}
.faq-answer{padding:0 22px 20px;font-size:14.5px;color:var(--muted);background:#F9FBFF;line-height:1.9;border-top:1px solid var(--line);padding-top:16px;}

/* ---------- cta ---------- */
.cta-band{background:var(--dark);color:var(--invert);border-radius:var(--r-lg);border:1px solid rgba(47,224,208,.35);box-shadow:0 20px 46px rgba(10,20,36,.36);padding:40px 40px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:26px;position:relative;overflow:hidden;}
.cta-band::after{content:"";position:absolute;right:-80px;top:-80px;width:260px;height:260px;border-radius:50%;background:radial-gradient(circle,rgba(47,224,208,.24),transparent 70%);}
.cta-band h2{font-size:24px;color:#fff;margin-bottom:10px;}
.cta-band p{font-size:14.5px;color:#B9C7DC;max-width:620px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;position:relative;z-index:2;}

/* ---------- footer ---------- */
.site-footer{background:var(--dark);color:#C7D3E6;margin-top:96px;border-top:1px solid rgba(47,224,208,.35);}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:36px;padding:64px 0 40px;}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:800;font-size:17px;margin-bottom:16px;}
.footer-about{font-size:14px;line-height:1.9;color:#93A4BE;}
.footer-col h4{font-size:15px;color:#fff;font-weight:800;margin-bottom:16px;}
.footer-col ul{display:grid;gap:10px;}
.footer-col a{font-size:14px;color:#A9B8CE;}
.footer-col a:hover{color:var(--neon);}
.footer-contact li{display:flex;gap:10px;font-size:14px;color:#A9B8CE;align-items:flex-start;}
.footer-contact i{color:var(--neon);margin-top:5px;}
.footer-bottom{display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;padding:18px 0 28px;border-top:1px solid rgba(255,255,255,.08);font-size:13px;color:#8497B1;}

/* ---------- responsive ---------- */
@media (max-width:1023px){
  :root{--sec-y:64px;}
  .nav-desktop{display:none;}
  .burger{display:inline-flex;align-items:center;justify-content:center;}
  .btn-nav{display:none;}
  .hero-inner{grid-template-columns:1fr;gap:32px;padding:48px 0 56px;}
  .page-hero h1{font-size:28px;}
  .card-grid{grid-template-columns:repeat(2,1fr);}
  .split{grid-template-columns:1fr;gap:30px;}
  .steps{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:28px;}
}
@media (max-width:640px){
  :root{--sec-y:48px;--nav-h:56px;}
  .container-x{padding:0 20px;}
  .logo{font-size:16px;}
  .page-hero h1{font-size:23px;line-height:1.4;}
  .hero-lead{font-size:15px;}
  .sec-title{font-size:21px;}
  .card-grid{grid-template-columns:1fr;}
  .steps{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;padding:44px 0 28px;}
  .cta-band{padding:28px 22px;}
  .cta-band h2{font-size:20px;}
  .hero-actions .btn{width:100%;}
  .faq-item summary{font-size:15.5px;padding:16px 18px;}
  .footer-bottom{font-size:12.5px;}
}

/* roulang page: category3 */
:root{
  --brand:#1358C4;
  --brand-deep:#0B3E92;
  --accent:#FF6A2B;
  --neon:#2FE0D0;
  --bg:#F4F7FC;
  --card:#FFFFFF;
  --line:#E3E9F2;
  --ink:#16202E;
  --muted:#5A6B82;
  --dark:#0A1424;
  --inv:#F8FAFF;
  --r-lg:20px;
  --r-md:16px;
  --r-sm:10px;
  --sh-1:0 6px 20px rgba(13,42,86,.07);
  --sh-2:0 14px 34px rgba(13,42,86,.14);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Noto Sans SC",sans-serif;
  background:var(--bg);
  color:var(--ink);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .2s ease}
button{font:inherit;cursor:pointer;border:0;background:none}
h1,h2,h3,h4{margin:0;font-weight:800;line-height:1.35;letter-spacing:0}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--neon);outline-offset:2px}

.container-x{max-width:1200px;margin:0 auto;padding:0 32px}
.section{padding:88px 0}
.section-sm{padding:56px 0}
.num{font-variant-numeric:tabular-nums}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:var(--dark);
  color:var(--inv);
  border-bottom:1px solid rgba(255,255,255,.06);
}
.site-header::before{
  content:"";display:block;height:2px;width:100%;
  background:linear-gradient(90deg,var(--neon),var(--brand) 55%,var(--brand-deep));
}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:24px;height:64px}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo-mark{
  width:34px;height:34px;border-radius:10px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--brand),var(--neon));
  color:#fff;font-size:15px;
}
.logo-text{display:flex;align-items:baseline;gap:6px;font-size:18px;font-weight:800;color:var(--inv);letter-spacing:.4px}
.logo-sub{font-size:12px;font-weight:500;color:var(--neon);border:1px solid rgba(47,224,208,.45);border-radius:999px;padding:1px 7px;line-height:1.6}
.nav-desktop{display:flex;align-items:center;gap:4px}
.nav-link{position:relative;padding:8px 12px;border-radius:8px;font-size:15px;color:#C7D3E6;transition:all .2s ease}
.nav-link:hover{color:#fff;background:rgba(47,224,208,.08)}
.nav-link.active{color:#fff;text-shadow:0 0 10px rgba(47,224,208,.65)}
.nav-link.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:var(--neon);border-radius:2px;box-shadow:0 0 10px var(--neon);
}
.nav-right{display:flex;align-items:center;gap:12px}
.btn-nav{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--brand);color:#fff;font-size:14px;font-weight:600;
  padding:9px 16px;border-radius:var(--r-sm);transition:all .2s ease;
}
.btn-nav:hover{background:#1a6ae0;box-shadow:0 0 0 3px rgba(47,224,208,.18),0 8px 20px rgba(19,88,196,.35)}
.burger{
  display:none;width:40px;height:40px;border-radius:10px;
  color:var(--inv);font-size:18px;background:rgba(255,255,255,.06);
}
.burger:hover{background:rgba(47,224,208,.14)}
.mobile-drawer{
  max-height:0;overflow:hidden;background:var(--dark);
  border-top:1px solid rgba(47,224,208,.16);
  transition:max-height .3s ease;
}
.mobile-drawer.open{max-height:460px}
.mobile-drawer a{
  display:flex;align-items:center;justify-content:space-between;
  height:48px;padding:0 22px;font-size:15px;color:#C7D3E6;
  border-bottom:1px solid rgba(255,255,255,.05);
}
.mobile-drawer a:hover{background:rgba(47,224,208,.08);color:#fff}
.mobile-drawer a.active{color:var(--neon)}

/* ---------- 通用组件 ---------- */
.badge-tag{
  display:inline-flex;align-items:center;gap:6px;
  background:#E7F0FF;color:var(--brand-deep);
  font-size:12px;font-weight:600;border-radius:999px;padding:5px 12px;
}
.badge-accent{
  display:inline-flex;align-items:center;gap:6px;
  background:var(--accent);color:#fff;
  font-size:12px;font-weight:600;border-radius:999px;padding:5px 12px;
}
.badge-dark{
  display:inline-flex;align-items:center;gap:6px;
  background:rgba(47,224,208,.16);color:var(--neon);
  border:1px solid rgba(47,224,208,.4);
  font-size:12px;font-weight:600;border-radius:999px;padding:5px 12px;
}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:600;padding:12px 22px;border-radius:var(--r-sm);
  transition:all .2s ease;white-space:nowrap;
}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:#1a6ae0;transform:translateY(-1px);box-shadow:0 10px 24px rgba(19,88,196,.32)}
.btn-ghost{background:transparent;color:var(--brand);border:1px solid var(--brand)}
.btn-ghost:hover{background:rgba(19,88,196,.08)}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:#ff7d43;transform:translateY(-1px);box-shadow:0 10px 24px rgba(255,106,43,.32)}
.btn-neon{background:rgba(47,224,208,.08);color:var(--neon);border:1px solid var(--neon)}
.btn-neon:hover{background:rgba(47,224,208,.18);box-shadow:0 0 18px rgba(47,224,208,.28)}
.btn-text{color:var(--brand);font-weight:600;font-size:14px;display:inline-flex;align-items:center;gap:6px}
.btn-text:hover{color:var(--brand-deep);gap:10px}

.section-head{max-width:760px;margin-bottom:40px}
.section-head h2{font-size:26px;margin-bottom:12px}
.section-head p{color:var(--muted);font-size:16px}

/* ---------- 面包屑 ---------- */
.breadcrumb{font-size:13px;color:var(--muted);display:flex;flex-wrap:wrap;gap:8px;align-items:center;padding:20px 0 4px}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .sep{color:#B7C3D6}
.breadcrumb .now{color:var(--ink);font-weight:600}

/* ---------- 页头区 ---------- */
.page-hero{padding:12px 0 64px;background:linear-gradient(180deg,#EEF4FD 0%,var(--bg) 100%)}
.hero-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;margin-top:26px}
.page-hero h1{font-size:32px;line-height:1.4;margin:16px 0 14px}
.hero-lead{font-size:17px;color:var(--muted);max-width:56ch}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin:22px 0 26px}
.tag-pill{
  display:inline-flex;align-items:center;gap:6px;
  font-size:13px;color:var(--brand-deep);background:#fff;
  border:1px solid var(--line);border-radius:999px;padding:6px 14px;
}
.tag-pill i{color:var(--accent);font-size:12px}
.btn-row{display:flex;flex-wrap:wrap;gap:14px}
.hero-media{
  position:relative;margin:0;border-radius:var(--r-lg);overflow:hidden;
  background:#E8EEF8;box-shadow:var(--sh-1);aspect-ratio:4/3;
}
.hero-media img{width:100%;height:100%;object-fit:cover}
.hero-media figcaption{
  position:absolute;left:16px;bottom:16px;right:16px;
  background:rgba(10,20,36,.78);color:var(--inv);
  font-size:13px;line-height:1.7;border-radius:12px;padding:10px 14px;
  backdrop-filter:blur(3px);
}
.hero-float{
  position:absolute;top:18px;right:18px;background:#fff;
  border-radius:14px;box-shadow:var(--sh-2);padding:12px 16px;font-size:13px;color:var(--muted);
}
.hero-float strong{display:block;font-size:22px;color:var(--ink);font-weight:800}

/* ---------- 信任数据条 ---------- */
.trust-bar{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  box-shadow:var(--sh-1);display:grid;grid-template-columns:repeat(4,1fr);
  margin-top:44px;overflow:hidden;
}
.trust-item{padding:22px 20px;border-right:1px solid var(--line);display:flex;gap:12px;align-items:flex-start}
.trust-item:last-child{border-right:0}
.trust-item i{
  width:38px;height:38px;flex-shrink:0;border-radius:999px;display:grid;place-items:center;
  border:1px solid rgba(47,224,208,.55);color:var(--brand);background:#F2F7FF;font-size:15px;
}
.trust-item h4{font-size:15px;margin-bottom:2px}
.trust-item p{font-size:13px;color:var(--muted);line-height:1.6}

/* ---------- Bento 网格 ---------- */
.bento{display:grid;grid-template-columns:repeat(4,1fr);grid-auto-rows:minmax(168px,auto);gap:20px}
.bento-item{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-md);
  padding:24px;box-shadow:var(--sh-1);transition:all .25s ease;position:relative;
}
.bento-item:hover{box-shadow:var(--sh-2);transform:translateY(-3px)}
.bento-item h3{font-size:17px;margin-bottom:8px}
.bento-item p{font-size:14px;color:var(--muted);line-height:1.75}
.bento-item .bi-icon{
  width:42px;height:42px;border-radius:12px;display:grid;place-items:center;
  background:#EAF2FF;color:var(--brand);font-size:17px;margin-bottom:14px;
}
.bento-large{
  grid-column:span 2;grid-row:span 2;padding:0;overflow:hidden;border:0;
  min-height:360px;background:#DDE6F4;
}
.bento-large img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.bento-overlay{
  position:relative;z-index:2;height:100%;display:flex;flex-direction:column;justify-content:flex-end;
  gap:12px;padding:30px;color:#fff;
  background:linear-gradient(180deg,rgba(10,20,36,.05) 20%,rgba(10,20,36,.86) 100%);
}
.bento-overlay h3{font-size:24px;line-height:1.45;color:#fff}
.bento-overlay p{color:rgba(248,250,255,.82);font-size:14.5px;line-height:1.8}
.bento-num{
  font-size:13px;font-weight:700;color:var(--brand);
  background:#EAF2FF;border-radius:999px;padding:2px 10px;display:inline-block;
}

/* ---------- 设备卡片 ---------- */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-md);
  overflow:hidden;box-shadow:var(--sh-1);transition:all .25s ease;display:flex;flex-direction:column;
}
.card:hover{box-shadow:var(--sh-2);transform:translateY(-3px)}
.card-media{aspect-ratio:4/3;background:#E8EEF8;overflow:hidden;position:relative}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease}
.card:hover .card-media img{transform:scale-105}
.card-body{padding:20px 20px 22px;display:flex;flex-direction:column;flex:1}
.card-body h3{font-size:17px;margin:10px 0 8px}
.card-body p{font-size:14px;color:var(--muted);line-height:1.75;flex:1}
.card-foot{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:16px;padding-top:14px;border-top:1px solid var(--line)}
.card-price{color:var(--accent);font-weight:800;font-size:16px}

/* ---------- 参数区 ---------- */
.spec-wrap{display:grid;grid-template-columns:0.9fr 1.1fr;gap:40px;align-items:start}
.spec-list{background:#fff;border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--sh-1);overflow:hidden}
.spec-row{display:grid;grid-template-columns:150px 1fr;gap:16px;padding:15px 22px;border-bottom:1px solid var(--line);font-size:14.5px;transition:background .2s ease}
.spec-row:last-child{border-bottom:0}
.spec-row:hover{background:#F5F9FF}
.spec-row dt{color:var(--muted)}
.spec-row dd{margin:0;font-weight:600;color:var(--ink)}
.dot-list li{position:relative;padding-left:20px;margin-bottom:12px;font-size:15px;color:var(--muted)}
.dot-list li::before{
  content:"";position:absolute;left:0;top:11px;width:7px;height:7px;border-radius:999px;background:var(--brand);
}
.dot-list li strong{color:var(--ink)}

/* ---------- 场景条 ---------- */
.scene-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.scene-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  padding:22px;box-shadow:var(--sh-1);transition:all .25s ease;
}
.scene-card:hover{box-shadow:var(--sh-2);transform:translateY(-3px)}
.scene-card span{font-size:13px;font-weight:700;color:var(--neon);background:var(--dark);border-radius:999px;padding:3px 10px}
.scene-card h3{font-size:17px;margin:12px 0 8px}
.scene-card p{font-size:14px;color:var(--muted);line-height:1.75}

/* ---------- FAQ ---------- */
.faq-list{display:grid;gap:12px;max-width:900px}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  overflow:hidden;transition:box-shadow .2s ease;
}
.faq-item[open]{box-shadow:var(--sh-1)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;
  gap:16px;padding:18px 22px;font-size:17px;font-weight:700;color:var(--ink);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary .plus{
  width:26px;height:26px;flex-shrink:0;border-radius:999px;display:grid;place-items:center;
  background:#EAF2FF;color:var(--brand);font-size:13px;transition:transform .2s ease;
}
.faq-item[open] summary .plus{transform:rotate(45deg)}
.faq-body{padding:0 22px 20px;color:var(--muted);font-size:15px;line-height:1.85;background:#F8FAFF;border-top:1px solid var(--line);padding-top:16px}

/* ---------- 底部 CTA ---------- */
.cta-band{
  background:var(--dark);border-radius:var(--r-lg);border:1px solid rgba(47,224,208,.35);
  padding:40px;display:grid;grid-template-columns:1.2fr .8fr;gap:32px;align-items:center;
  color:var(--inv);box-shadow:0 18px 40px rgba(10,20,36,.25);
}
.cta-band h2{font-size:24px;color:#fff;margin-bottom:12px}
.cta-band p{color:rgba(248,250,255,.75);font-size:15px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:flex-end}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--dark);color:var(--inv);margin-top:88px;border-top:1px solid var(--neon)}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:36px;padding:56px 0 36px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;font-size:17px;font-weight:800}
.footer-about{font-size:13.5px;color:rgba(248,250,255,.68);line-height:1.85;max-width:42ch}
.footer-col h4{font-size:15px;margin-bottom:16px;color:#fff}
.footer-col ul li{margin-bottom:11px}
.footer-col ul li a{font-size:14px;color:rgba(248,250,255,.68)}
.footer-col ul li a:hover{color:var(--neon)}
.footer-contact li{display:flex;gap:10px;align-items:flex-start;font-size:14px;color:rgba(248,250,255,.68);margin-bottom:11px}
.footer-contact i{color:var(--neon);margin-top:5px}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.08);padding:18px 0 26px;
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:rgba(248,250,255,.55);
}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  .nav-desktop,.btn-nav{display:none}
  .burger{display:grid;place-items:center}
  .hero-grid{grid-template-columns:1fr;gap:32px}
  .bento{grid-template-columns:repeat(2,1fr)}
  .bento-large{grid-column:span 2;grid-row:span 2;min-height:320px}
  .card-grid{grid-template-columns:repeat(2,1fr)}
  .spec-wrap{grid-template-columns:1fr;gap:28px}
  .scene-grid{grid-template-columns:repeat(2,1fr)}
  .cta-band{grid-template-columns:1fr;padding:32px}
  .cta-actions{justify-content:flex-start}
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:28px}
  .trust-bar{grid-template-columns:repeat(2,1fr)}
  .trust-item:nth-child(2){border-right:0}
  .trust-item:nth-child(1),.trust-item:nth-child(2){border-bottom:1px solid var(--line)}
}
@media (max-width:767px){
  .container-x{padding:0 20px}
  .section{padding:52px 0}
  .page-hero{padding:8px 0 44px}
  .page-hero h1{font-size:26px;line-height:1.45}
  .hero-lead{font-size:16px}
  .section-head h2{font-size:22px}
  .bento{grid-template-columns:1fr;grid-auto-rows:auto}
  .bento-large{grid-column:span 1;grid-row:span 1;min-height:300px}
  .bento-overlay h3{font-size:20px}
  .card-grid{grid-template-columns:1fr}
  .scene-grid{grid-template-columns:1fr}
  .trust-bar{grid-template-columns:1fr}
  .trust-item{border-right:0;border-bottom:1px solid var(--line)}
  .trust-item:last-child{border-bottom:0}
  .spec-row{grid-template-columns:1fr;gap:4px}
  .footer-grid{grid-template-columns:1fr;padding:40px 0 28px}
  .footer-bottom{flex-direction:column;gap:8px}
  .btn{width:100%}
  .cta-actions{width:100%}
  .faq-item summary{font-size:16px;padding:16px 18px}
}
@media (max-width:519px){
  .logo-text{font-size:16px}
  .logo-sub{display:none}
  .hero-float{position:static;margin-top:14px}
}

/* roulang page: category4 */
:root{
  --brand:#1358C4;
  --brand-deep:#0B3E92;
  --accent:#FF6A2B;
  --neon:#2FE0D0;
  --bg:#F4F7FC;
  --card:#FFFFFF;
  --line:#E3E9F2;
  --text:#16202E;
  --muted:#5A6B82;
  --dark:#0A1424;
  --r-lg:20px;
  --r-md:16px;
  --r-sm:10px;
  --sh-1:0 6px 20px rgba(13,42,86,.07);
  --sh-2:0 14px 34px rgba(13,42,86,.14);
  --maxw:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer;border:none;background:none}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
.num{font-variant-numeric:tabular-nums}

.container-x{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 32px}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--dark);
  border-bottom:1px solid rgba(47,224,208,.12);
}
.site-header::before{
  content:"";display:block;height:2px;
  background:linear-gradient(90deg,var(--neon),var(--brand) 55%,var(--brand-deep));
}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:20px;height:64px}
.logo{display:flex;align-items:center;gap:10px;color:#F8FAFF;font-weight:800;font-size:18px;white-space:nowrap}
.logo-mark{
  width:34px;height:34px;border-radius:10px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--neon),var(--brand));
  color:#06121F;font-size:15px;flex:0 0 auto;
}
.logo-sub{
  font-size:12px;font-weight:600;color:var(--neon);
  margin-left:6px;padding:2px 8px;border:1px solid rgba(47,224,208,.5);
  border-radius:999px;vertical-align:middle;
}
.nav-desktop{display:flex;align-items:center;gap:4px}
.nav-link{
  position:relative;padding:8px 12px;font-size:15px;color:#B9C6DA;
  border-radius:8px;transition:color .2s ease;
}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:var(--neon);transform:scaleX(0);transition:transform .2s ease;
}
.nav-link:hover{color:#FFFFFF}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.active{color:#FFFFFF;text-shadow:0 0 12px rgba(47,224,208,.6)}
.nav-link.active::after{transform:scaleX(1)}
.nav-right{display:flex;align-items:center;gap:12px}
.btn-nav{
  display:inline-flex;align-items:center;gap:8px;height:40px;padding:0 18px;
  border-radius:var(--r-sm);background:var(--brand);color:#FFFFFF;
  font-size:15px;font-weight:600;transition:all .2s ease;
}
.btn-nav:hover{background:#1A6AE0;box-shadow:0 0 0 4px rgba(47,224,208,.18)}
.burger{
  display:none;width:42px;height:42px;border-radius:10px;
  color:#F8FAFF;font-size:18px;border:1px solid rgba(255,255,255,.16);
}
.burger:hover{border-color:rgba(47,224,208,.6);color:var(--neon)}
.mobile-drawer{
  display:none;position:fixed;left:0;right:0;top:66px;bottom:0;
  background:var(--dark);padding:8px 20px 28px;overflow-y:auto;z-index:55;
}
.mobile-drawer.is-open{display:block;animation:drawerIn .24s ease}
@keyframes drawerIn{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:none}}
.mobile-drawer a{
  display:flex;align-items:center;justify-content:space-between;
  height:48px;color:#C7D3E4;font-size:15px;
  border-bottom:1px solid rgba(255,255,255,.07);
}
.mobile-drawer a.active{color:var(--neon);text-shadow:0 0 10px rgba(47,224,208,.5)}

/* ============ 通用组件 ============ */
.section{padding:88px 0}
.section-tight{padding:64px 0}
.sec-head{max-width:720px;margin-bottom:44px}
.sec-eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;
  color:var(--brand);background:#E8F0FE;border-radius:999px;padding:5px 14px;margin-bottom:14px;
}
.h1{font-size:40px;line-height:1.28;font-weight:800;letter-spacing:-.5px}
.h2{font-size:28px;line-height:1.36;font-weight:800;letter-spacing:-.3px}
.h3{font-size:19px;line-height:1.5;font-weight:700}
.lead{font-size:17px;color:var(--muted);line-height:1.85}
.tiny{font-size:13px;color:var(--muted);line-height:1.7}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border-radius:var(--r-sm);
  font-size:15px;font-weight:600;border:1px solid transparent;
  transition:all .2s ease;white-space:nowrap;
}
.btn:focus-visible{outline:2px solid var(--neon);outline-offset:2px}
.btn-primary{background:var(--brand);color:#FFFFFF}
.btn-primary:hover{background:#1A6AE0;transform:translateY(-1px);box-shadow:0 10px 24px rgba(19,88,196,.28)}
.btn-outline{background:#FFFFFF;color:var(--brand);border-color:var(--brand)}
.btn-outline:hover{background:rgba(19,88,196,.08)}
.btn-neon{background:rgba(47,224,208,.08);color:var(--neon);border-color:rgba(47,224,208,.55)}
.btn-neon:hover{background:rgba(47,224,208,.18);box-shadow:0 0 0 4px rgba(47,224,208,.12)}
.btn-sm{height:40px;padding:0 18px;font-size:14px}

.badge{display:inline-flex;align-items:center;gap:6px;border-radius:999px;font-size:12px;font-weight:600;padding:4px 12px}
.badge-blue{background:#E8F0FE;color:var(--brand-deep)}
.badge-accent{background:var(--accent);color:#FFFFFF}
.badge-neon{background:rgba(47,224,208,.14);color:#0B6A62;border:1px solid rgba(47,224,208,.45)}
.badge-soft{background:#EFF4FB;color:var(--muted);border:1px solid var(--line)}

.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-md);
  box-shadow:var(--sh-1);transition:transform .25s ease,box-shadow .25s ease;
}
.card-hover:hover{transform:translateY(-3px);box-shadow:var(--sh-2)}
.card-body{padding:20px 22px 22px}
.card-media{aspect-ratio:4/3;border-radius:14px;overflow:hidden;background:#EDF2FA;margin:14px 14px 0}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease}
.card-hover:hover .card-media img{transform:scale(1.05)}
.tag-row{display:flex;flex-wrap:wrap;gap:10px}
.tag{
  display:inline-flex;align-items:center;gap:6px;font-size:13px;color:var(--brand-deep);
  background:#FFFFFF;border:1px solid var(--line);border-radius:999px;padding:6px 14px;
}
.tag i{color:var(--neon)}

/* ============ 面包屑 & 内页头 ============ */
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted);padding-top:26px}
.crumb a{color:var(--muted)}
.crumb a:hover{color:var(--brand)}
.crumb-current{color:#8C9CB2}
.page-hero{
  position:relative;overflow:hidden;
  background:linear-gradient(180deg,#FFFFFF 0%,var(--bg) 100%);
  padding-bottom:72px;border-bottom:1px solid var(--line);
}
.page-hero::after{
  content:"";position:absolute;right:-160px;top:-120px;width:460px;height:460px;
  background:radial-gradient(circle,rgba(19,88,196,.12),transparent 70%);pointer-events:none;
}
.hero-media{position:relative;border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh-2);background:#DCE6F5}
.hero-media img{width:100%;aspect-ratio:16/11;object-fit:cover}
.hero-media::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(10,20,36,0) 40%,rgba(10,20,36,.55));
}
.float-card{
  position:absolute;left:18px;right:18px;bottom:18px;
  background:rgba(255,255,255,.96);border-radius:14px;padding:14px 18px;
  display:flex;flex-wrap:wrap;gap:10px 24px;align-items:center;backdrop-filter:blur(4px);
}
.float-item{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text);font-weight:600}
.float-item i{color:var(--brand)}

/* ============ 能力格子 ============ */
.ability{
  background:#FFFFFF;border:1px solid var(--line);border-radius:var(--r-md);
  padding:26px 24px;box-shadow:var(--sh-1);transition:all .25s ease;
}
.ability:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:#CFDDF3}
.ability-no{
  font-size:26px;font-weight:800;color:var(--brand);opacity:.22;
  line-height:1;margin-bottom:12px;font-variant-numeric:tabular-nums;
}

/* ============ 时间轴 ============ */
.tl-item{display:grid;grid-template-columns:56px 1fr;gap:20px;position:relative;padding-bottom:30px}
.tl-item::before{
  content:"";position:absolute;left:27px;top:56px;bottom:6px;width:2px;
  background:linear-gradient(180deg,var(--brand),rgba(19,88,196,.12));
}
.tl-item:last-child{padding-bottom:0}
.tl-item:last-child::before{display:none}
.tl-dot{
  width:56px;height:56px;border-radius:50%;background:#FFFFFF;border:2px solid var(--brand);
  color:var(--brand);display:grid;place-items:center;font-weight:800;font-size:17px;
  box-shadow:0 6px 16px rgba(19,88,196,.16);font-variant-numeric:tabular-nums;
}
.tl-title{font-size:18px;font-weight:700;margin-bottom:6px}
.tl-text{font-size:15px;color:var(--muted);line-height:1.85}

.mini-card{
  display:grid;grid-template-columns:96px 1fr;gap:14px;align-items:center;
  background:#FFFFFF;border:1px solid var(--line);border-radius:var(--r-md);
  padding:12px;box-shadow:var(--sh-1);transition:all .25s ease;
}
.mini-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#CFDDF3}
.mini-thumb{aspect-ratio:4/3;border-radius:10px;overflow:hidden;background:#EDF2FA}
.mini-thumb img{width:100%;height:100%;object-fit:cover}
.mini-link{font-size:13px;font-weight:600;color:var(--brand);display:inline-flex;align-items:center;gap:5px}
.mini-link:hover{color:var(--accent)}

/* ============ 参数列表 ============ */
.spec-box{
  background:#FFFFFF;border:1px solid var(--line);border-radius:var(--r-md);
  padding:28px 26px;box-shadow:var(--sh-1);height:100%;
}
.spec-box h3{font-size:19px;font-weight:800;margin-bottom:6px}
.spec-box .spec-sub{font-size:13px;color:var(--muted);margin-bottom:18px}
.spec-list li{
  display:flex;gap:10px;align-items:flex-start;
  font-size:15px;color:#33455C;line-height:1.8;padding:9px 0;border-bottom:1px dashed var(--line);
}
.spec-list li:last-child{border-bottom:none}
.spec-list i{color:var(--neon);font-size:13px;margin-top:8px;flex:0 0 auto}
.spec-key{color:var(--text);font-weight:700}

/* ============ 场景卡 ============ */
.scene-card{overflow:hidden;border-radius:var(--r-md);background:#FFFFFF;border:1px solid var(--line);box-shadow:var(--sh-1);transition:all .25s ease}
.scene-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2)}
.scene-card img{width:100%;aspect-ratio:4/3;object-fit:cover}

/* ============ 保障条 ============ */
.guarantee{background:#FFFFFF;border:1px solid var(--line);border-radius:var(--r-lg);padding:34px 28px;box-shadow:var(--sh-1)}
.g-item{display:flex;gap:14px;align-items:flex-start}
.g-icon{
  width:44px;height:44px;border-radius:50%;flex:0 0 auto;display:grid;place-items:center;
  border:1px solid rgba(47,224,208,.55);color:var(--brand);background:#F2F8FF;font-size:17px;
}
.g-title{font-size:16px;font-weight:700;margin-bottom:2px}

/* ============ FAQ ============ */
.faq-list{display:grid;gap:12px}
.faq-item{
  background:#FFFFFF;border:1px solid var(--line);border-radius:var(--r-md);
  box-shadow:var(--sh-1);overflow:hidden;transition:border-color .2s ease;
}
.faq-item[open]{border-color:#CFDDF3}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;
  gap:16px;padding:18px 22px;font-size:17px;font-weight:700;color:var(--text);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary .fa-plus{
  color:var(--brand);font-size:14px;transition:transform .2s ease;flex:0 0 auto;
}
.faq-item[open] summary .fa-plus{transform:rotate(45deg)}
.faq-body{
  padding:0 22px 20px;color:var(--muted);font-size:15px;line-height:1.9;
  background:#F7FAFF;border-top:1px solid var(--line);
}
.faq-body p{padding-top:14px}

/* ============ 深色 CTA ============ */
.cta-dark{
  position:relative;overflow:hidden;background:var(--dark);
  border:1px solid rgba(47,224,208,.35);border-radius:var(--r-lg);
  padding:52px 44px;color:#E8EEF8;
}
.cta-dark::before{
  content:"";position:absolute;left:-120px;bottom:-160px;width:420px;height:420px;
  background:radial-gradient(circle,rgba(47,224,208,.18),transparent 70%);
}
.cta-dark::after{
  content:"";position:absolute;right:-80px;top:-120px;width:340px;height:340px;
  background:radial-gradient(circle,rgba(19,88,196,.32),transparent 70%);
}
.cta-inner{position:relative;z-index:2}
.field label{display:block;font-size:13px;color:#9FB0C6;margin-bottom:6px}
.field input,.field select{
  width:100%;height:44px;border-radius:var(--r-sm);
  border:1px solid rgba(255,255,255,.18);background:rgba(255,255,255,.06);
  color:#F8FAFF;padding:0 14px;font-size:15px;transition:all .2s ease;
}
.field input::placeholder{color:#7E8FA6}
.field input:focus,.field select:focus{
  outline:none;border-color:var(--neon);box-shadow:0 0 0 3px rgba(47,224,208,.18);
}
.form-ok{
  display:none;align-items:center;gap:8px;margin-top:14px;font-size:14px;color:var(--neon);
}

/* ============ 页脚 ============ */
.site-footer{
  position:relative;background:var(--dark);color:#B9C6DA;
  padding-top:64px;margin-top:0;
}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,var(--neon),transparent);
}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:36px;padding-bottom:42px;
}
.footer-brand{display:flex;align-items:center;gap:10px;color:#F8FAFF;font-weight:800;font-size:17px;margin-bottom:14px}
.footer-about{font-size:14px;line-height:1.9;color:#93A4BB;max-width:340px}
.footer-col h4{color:#FFFFFF;font-size:16px;font-weight:700;margin-bottom:14px}
.footer-col ul li a{display:inline-block;font-size:14px;color:#9FB0C6;line-height:2.1;transition:color .2s ease}
.footer-col ul li a:hover{color:var(--neon)}
.footer-contact li{display:flex;gap:10px;align-items:flex-start;font-size:14px;color:#9FB0C6;line-height:2.1}
.footer-contact i{color:var(--neon);margin-top:9px;font-size:13px}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.08);display:flex;flex-wrap:wrap;
  justify-content:space-between;gap:10px;padding:18px 0 22px;
  font-size:13px;color:#7E8FA6;
}

/* ============ 响应式 ============ */
@media (max-width:1024px){
  .nav-desktop{display:none}
  .burger{display:grid;place-items:center}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
  .section{padding:64px 0}
  .h1{font-size:32px}
  .h2{font-size:24px}
}
@media (max-width:640px){
  .container-x{padding:0 20px}
  .site-header::before{height:2px}
  .nav-wrap{height:56px}
  .logo{font-size:16px}
  .logo-sub{display:none}
  .btn-nav{display:none}
  .mobile-drawer{top:58px}
  .section{padding:48px 0}
  .page-hero{padding-bottom:48px}
  .h1{font-size:26px;line-height:1.34}
  .h2{font-size:22px}
  .lead{font-size:15.5px}
  .cta-dark{padding:34px 22px}
  .float-card{position:static;margin-top:12px;left:auto;right:auto;bottom:auto}
  .hero-media::before{display:none}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .tl-item{grid-template-columns:44px 1fr;gap:14px}
  .tl-dot{width:44px;height:44px;font-size:15px}
  .tl-item::before{left:21px;top:44px}
  .mini-card{grid-template-columns:80px 1fr}
}