/* roulang page: index */
:root{
  --bg-0:#070C18; --bg-1:#0C1424; --bg-2:#121C30;
  --line:rgba(120,200,255,0.14);
  --primary:#2FD8C6; --primary-2:#35B8FF; --accent:#FF7A45; --accent-2:#FFB020;
  --text-1:#E8F1FA; --text-2:#9FB3C8; --text-3:#64798F;
  --glow:rgba(47,216,198,0.45);
  --glass:rgba(18,28,48,0.55);
  --radius-s:10px; --radius-m:16px; --radius-l:24px;
  --shadow-card:0 12px 32px -12px rgba(0,0,0,.7);
  --shadow-glow:0 0 0 1px rgba(47,216,198,.35), 0 8px 28px -6px var(--glow);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--text-1);
  font-family:'PingFang SC','HarmonyOS Sans','Microsoft YaHei','Noto Sans SC',system-ui,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
::selection{background:rgba(47,216,198,.3);color:#fff;}
::-webkit-scrollbar{width:10px;height:10px;}
::-webkit-scrollbar-track{background:var(--bg-1);}
::-webkit-scrollbar-thumb{background:rgba(120,200,255,.18);border-radius:999px;}
::-webkit-scrollbar-thumb:hover{background:rgba(47,216,198,.4);}

.site-container{width:100%;max-width:1240px;margin:0 auto;padding-left:20px;padding-right:20px;}
@media (max-width:640px){.site-container{padding-left:16px;padding-right:16px;}}

.section{padding-top:88px;padding-bottom:88px;position:relative;}
.section-tight{padding-top:64px;padding-bottom:64px;}
@media (max-width:768px){.section{padding-top:52px;padding-bottom:52px;}.section-tight{padding-top:44px;padding-bottom:44px;}}
.hairline{height:1px;border:0;background:linear-gradient(90deg,transparent,rgba(120,200,255,.22),transparent);}

.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.08em;color:var(--primary);
  padding:6px 12px;border:1px solid var(--line);border-radius:999px;
  background:var(--glass);backdrop-filter:blur(12px);
}
.sec-title{font-size:32px;line-height:1.25;font-weight:700;color:var(--text-1);}
.sec-sub{font-size:15px;color:var(--text-2);line-height:1.85;max-width:720px;margin-top:12px;}
@media (max-width:768px){.sec-title{font-size:24px;}.sec-sub{font-size:14px;}}

/* ---------- header / nav ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background 260ms ease-out,border-color 260ms ease-out,backdrop-filter 260ms ease-out;
}
.site-header.is-scrolled{
  background:rgba(7,12,24,.85);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:24px;height:74px;}
.brand{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:700;color:var(--text-1);white-space:nowrap;}
.brand-mark{
  width:30px;height:30px;flex:0 0 30px;border-radius:9px;
  border:1.5px solid var(--primary);position:relative;
  background:linear-gradient(135deg,rgba(47,216,198,.16),rgba(53,184,255,.05));
}
.brand-mark::after{
  content:"";position:absolute;left:7px;top:11px;width:14px;height:7px;
  border:1.5px solid var(--primary);border-top:0;border-radius:0 0 12px 12px;
}
.nav-list{display:flex;align-items:center;gap:4px;}
.nav-item{position:relative;}
.nav-link{
  display:inline-flex;align-items:center;gap:3px;
  padding:9px 14px;font-size:14px;font-weight:500;color:var(--text-2);
  border-radius:var(--radius-s);transition:color 180ms ease-out,background 180ms ease-out;
}
.nav-link:hover{color:var(--text-1);background:rgba(120,200,255,.07);}
.nav-link:focus-visible{outline:2px solid var(--primary);outline-offset:2px;}
.nav-link.is-active{color:var(--text-1);}
.nav-link.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;
  border-radius:2px;background:var(--primary);box-shadow:0 0 10px var(--glow);
}
.nav-actions{display:flex;align-items:center;gap:10px;}
.icon-btn{
  width:38px;height:38px;display:inline-flex;align-items:center;justify-content:center;
  border-radius:var(--radius-s);border:1px solid var(--line);background:var(--glass);
  color:var(--text-2);transition:all 180ms ease-out;
}
.icon-btn:hover{color:var(--primary);border-color:rgba(47,216,198,.4);}
.icon-btn:focus-visible{outline:2px solid var(--primary);outline-offset:2px;}

.mega{
  position:absolute;top:calc(100% + 14px);left:50%;transform:translate(-50%,8px);
  width:760px;padding:22px;border-radius:var(--radius-l);
  background:rgba(12,20,36,.94);backdrop-filter:blur(18px);
  border:1px solid var(--line);box-shadow:var(--shadow-card);
  opacity:0;visibility:hidden;transition:opacity 200ms ease-out,transform 200ms ease-out;
  display:grid;grid-template-columns:1.05fr 1.15fr .95fr;gap:20px;
}
.mega::before{
  content:"";position:absolute;left:22px;right:22px;top:0;height:3px;border-radius:3px;
  background:linear-gradient(90deg,var(--primary),var(--primary-2));
}
.nav-item.has-mega:hover .mega,.nav-item.has-mega:focus-within .mega{opacity:1;visibility:visible;transform:translate(-50%,0);}
.mega-col-title{font-size:12px;color:var(--primary);letter-spacing:.06em;margin-bottom:12px;}
.mega-link{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--text-2);padding:7px 0;transition:color 160ms ease-out,transform 160ms ease-out;}
.mega-link:hover{color:var(--primary);transform:translateX(3px);}
.mega-dot{width:6px;height:6px;border-radius:999px;background:var(--primary);flex:0 0 6px;}
.mega-post{display:block;padding:9px 0;border-bottom:1px dashed rgba(120,200,255,.12);}
.mega-post:last-child{border-bottom:0;}
.mega-post b{display:block;font-size:14px;font-weight:500;color:var(--text-1);line-height:1.5;
  overflow:hidden;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;}
.mega-post span{font-size:12px;color:var(--text-3);}
.mega-post:hover b{color:var(--primary);}
.mega-card{display:block;border:1px solid var(--line);border-radius:var(--radius-m);overflow:hidden;background:rgba(18,28,48,.6);}
.mega-card .thumb{aspect-ratio:16/10;border-radius:0;}
.mega-card div{padding:10px 12px 12px;}
.mega-card strong{display:block;font-size:14px;font-weight:600;color:var(--text-1);}
.mega-card em{display:block;font-size:12px;font-style:normal;color:var(--text-2);margin-top:4px;}
.mega-card:hover{border-color:rgba(47,216,198,.4);}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 20px;font-size:14px;font-weight:600;border-radius:var(--radius-s);
  border:1px solid transparent;cursor:pointer;white-space:nowrap;
  transition:transform 200ms ease-out,box-shadow 200ms ease-out,background 200ms ease-out,color 200ms ease-out,border-color 200ms ease-out;
}
.btn:focus-visible{outline:2px solid var(--primary);outline-offset:2px;}
.btn-primary{background:var(--accent);color:#1A0A02;box-shadow:0 8px 26px -8px rgba(255,122,69,.65);}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 30px -8px rgba(255,122,69,.8);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{background:var(--glass);color:var(--text-1);border-color:var(--line);backdrop-filter:blur(12px);}
.btn-ghost:hover{border-color:rgba(47,216,198,.5);color:var(--primary);transform:translateY(-2px);}
.btn-brand{background:var(--primary);color:#05201E;box-shadow:0 8px 26px -10px var(--glow);}
.btn-brand:hover{transform:translateY(-2px);}
.btn-sm{padding:8px 14px;font-size:13px;}
.btn-block{width:100%;}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;padding-top:56px;padding-bottom:72px;}
.hero-bg{
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
  opacity:.34;
}
.hero-mask{position:absolute;inset:0;background:linear-gradient(180deg,rgba(7,12,24,.86) 0%,rgba(7,12,24,.94) 55%,var(--bg-0) 100%);}
.hero-glow{
  position:absolute;top:-180px;left:-120px;width:640px;height:640px;border-radius:50%;
  background:radial-gradient(circle,rgba(47,216,198,.22),transparent 66%);
  filter:blur(10px);pointer-events:none;
}
.hero-grid-tex{
  position:absolute;inset:0;pointer-events:none;opacity:.35;
  background-image:linear-gradient(rgba(120,200,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(120,200,255,.05) 1px,transparent 1px);
  background-size:56px 56px;
  -webkit-mask-image:radial-gradient(circle at 30% 30%,#000,transparent 72%);
  mask-image:radial-gradient(circle at 30% 30%,#000,transparent 72%);
}
.hero-inner{position:relative;z-index:2;display:grid;grid-template-columns:1.05fr .95fr;gap:52px;align-items:center;}
.hero h1{font-size:44px;line-height:1.25;font-weight:700;margin-top:20px;color:#fff;}
.hero h1 .hl{color:var(--primary);}
.hero-sub{font-size:16px;color:var(--text-2);margin-top:18px;line-height:1.9;max-width:560px;}
.hero-btns{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px;}
.hero-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:36px;}
.hero-stat{
  padding:16px 14px;border:1px solid var(--line);border-radius:var(--radius-m);
  background:var(--glass);backdrop-filter:blur(12px);
}
.hero-stat b{display:block;font-size:26px;font-weight:700;color:var(--accent-2);line-height:1.2;}
.hero-stat span{display:block;font-size:13px;color:var(--text-2);margin-top:6px;}
.hero-visual{position:relative;}
.hero-visual .thumb{aspect-ratio:4/3;border-radius:var(--radius-l);border:1px solid var(--line);box-shadow:var(--shadow-card);}
.hero-float{
  position:absolute;left:-18px;bottom:-22px;width:262px;padding:16px;
  border-radius:var(--radius-m);border:1px solid var(--line);
  background:rgba(12,20,36,.86);backdrop-filter:blur(16px);box-shadow:var(--shadow-card);
}
.hero-float .row{display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--text-2);padding:5px 0;}
.hero-float .row b{color:var(--text-1);font-weight:600;}
.hero-float .price{font-size:22px;font-weight:700;color:var(--accent-2);}
@media (max-width:1024px){
  .hero-inner{grid-template-columns:1fr;gap:40px;}
  .hero h1{font-size:34px;}
  .hero-float{position:static;width:100%;margin-top:16px;left:auto;bottom:auto;}
}
@media (max-width:640px){
  .hero{padding-top:32px;padding-bottom:52px;}
  .hero h1{font-size:30px;}
  .hero-stats{grid-template-columns:1fr 1fr;}
}

/* ---------- thumb ---------- */
.thumb{
  position:relative;overflow:hidden;border-radius:var(--radius-m);
  aspect-ratio:16/10;
  background:linear-gradient(140deg,#132038 0%,#0B1322 60%,#16273F 100%);
}
.thumb img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform 400ms ease-out;}
.thumb-fallback{
  position:absolute;inset:0;display:flex;align-items:center;justify-content:center;
  font-size:34px;font-weight:700;color:rgba(47,216,198,.4);letter-spacing:.1em;
}
.thumb-4x3{aspect-ratio:4/3;}

/* ---------- cards ---------- */
.card{
  background:var(--glass);border:1px solid var(--line);border-radius:var(--radius-m);
  backdrop-filter:blur(12px);box-shadow:var(--shadow-card);
  transition:transform 220ms ease-out,border-color 220ms ease-out,box-shadow 220ms ease-out;
}
.card:hover{transform:translateY(-4px);border-color:rgba(47,216,198,.4);box-shadow:0 18px 40px -18px rgba(47,216,198,.4);}
.badge{
  display:inline-flex;align-items:center;gap:5px;
  padding:3px 10px;font-size:12px;border-radius:999px;
  border:1px solid rgba(47,216,198,.4);color:var(--primary);
  background:rgba(47,216,198,.08);white-space:nowrap;
}
.badge-warm{border-color:rgba(255,122,69,.45);color:var(--accent);background:rgba(255,122,69,.1);}
.badge-muted{border-color:var(--line);color:var(--text-3);background:rgba(120,200,255,.05);}

/* 主推爆款非对称网格 */
.promo-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;grid-auto-rows:1fr;}
.promo-hero{grid-column:span 2;grid-row:span 2;display:flex;flex-direction:column;overflow:hidden;}
.promo-hero .thumb{aspect-ratio:auto;height:260px;border-radius:var(--radius-m) var(--radius-m) 0 0;flex:0 0 auto;}
.promo-hero .body{padding:22px;display:flex;flex-direction:column;gap:12px;flex:1;}
.promo-small{display:flex;flex-direction:column;overflow:hidden;}
.promo-small .thumb{aspect-ratio:16/10;border-radius:var(--radius-m) var(--radius-m) 0 0;}
.promo-small .body{padding:14px;display:flex;flex-direction:column;gap:8px;flex:1;}
.card-title{font-size:17px;font-weight:600;color:var(--text-1);line-height:1.5;}
.promo-hero .card-title{font-size:22px;}
.card-desc{font-size:13px;color:var(--text-2);line-height:1.7;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.price-line{display:flex;align-items:baseline;gap:6px;font-size:13px;color:var(--text-3);margin-top:auto;}
.price-line b{font-size:19px;font-weight:700;color:var(--accent-2);}
.promo-hero .price-line b{font-size:26px;}
@media (max-width:1024px){
  .promo-grid{grid-template-columns:repeat(2,1fr);}
  .promo-hero{grid-column:span 2;grid-row:auto;}
  .promo-hero .thumb{height:220px;}
}
@media (max-width:520px){
  .promo-grid{grid-template-columns:repeat(2,1fr);gap:12px;}
  .promo-hero{grid-column:span 2;}
  .promo-small .body{padding:11px;}
  .card-title{font-size:15px;}
}

/* ---------- reviews ---------- */
.review-track{
  display:flex;gap:18px;overflow-x:auto;padding:6px 2px 18px;
  scroll-snap-type:x mandatory;scrollbar-width:none;
}
.review-track::-webkit-scrollbar{display:none;}
.review-card{
  flex:0 0 350px;scroll-snap-align:start;padding:20px;
  background:var(--glass);border:1px solid var(--line);border-radius:var(--radius-m);
  backdrop-filter:blur(12px);
}
.review-card p{font-size:14px;color:var(--text-2);line-height:1.8;margin-top:10px;}
.stars{color:var(--accent-2);font-size:14px;letter-spacing:2px;}
.avatar{
  width:38px;height:38px;border-radius:999px;display:flex;align-items:center;justify-content:center;
  font-size:14px;font-weight:700;color:#05201E;background:linear-gradient(135deg,var(--primary),var(--primary-2));
}
.carousel-btn{
  width:40px;height:40px;border-radius:999px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);background:var(--glass);color:var(--text-2);cursor:pointer;
  transition:all 180ms ease-out;
}
.carousel-btn:hover{color:var(--primary);border-color:rgba(47,216,198,.45);box-shadow:0 0 0 1px rgba(47,216,198,.25);}
.carousel-btn:focus-visible{outline:2px solid var(--primary);outline-offset:2px;}
@media (max-width:640px){.review-card{flex:0 0 278px;}}

/* ---------- 保障条 ---------- */
.guard-bar{
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  background:rgba(18,28,48,.42);backdrop-filter:blur(10px);
}
.guard-grid{display:grid;grid-template-columns:repeat(4,1fr);}
.guard-item{padding:26px 22px;border-right:1px solid var(--line);}
.guard-item:last-child{border-right:0;}
.guard-item h3{font-size:15px;font-weight:600;margin-top:12px;color:var(--text-1);}
.guard-item p{font-size:13px;color:var(--text-2);margin-top:6px;line-height:1.7;}
@media (max-width:768px){
  .guard-grid{grid-template-columns:1fr 1fr;}
  .guard-item{border-right:0;border-bottom:1px solid var(--line);padding:20px 16px;}
  .guard-item:nth-child(odd){border-right:1px solid var(--line);}
}

/* ---------- 资讯列表 ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
.news-card{display:flex;flex-direction:column;padding:20px;gap:12px;}
.news-date{display:flex;align-items:center;gap:10px;font-size:12px;color:var(--text-3);}
.news-card h3{font-size:16px;font-weight:600;color:var(--text-1);line-height:1.55;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-card:hover h3{color:var(--primary);}
.news-card p{font-size:13px;color:var(--text-2);line-height:1.75;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-more{display:inline-flex;align-items:center;gap:6px;font-size:13px;color:var(--primary);margin-top:auto;}
.skeleton{
  height:190px;border-radius:var(--radius-m);border:1px solid var(--line);
  background:linear-gradient(90deg,#101A2C 0%,#182742 50%,#101A2C 100%);
  background-size:200% 100%;animation:shimmer 1.6s infinite linear;
}
@keyframes shimmer{0%{background-position:200% 0;}100%{background-position:-200% 0;}}
.empty-state{
  grid-column:1/-1;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:10px;padding:52px 20px;border:1px dashed var(--line);border-radius:var(--radius-m);
  color:var(--text-2);font-size:14px;text-align:center;background:rgba(18,28,48,.32);
}
@media (max-width:1024px){.news-grid{grid-template-columns:1fr 1fr;}}
@media (max-width:640px){.news-grid{grid-template-columns:1fr;}}

/* ---------- 分类入口 ---------- */
.cat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;}
.cat-card{display:block;padding:22px;border-radius:var(--radius-m);
  background:var(--glass);border:1px solid var(--line);backdrop-filter:blur(12px);
  transition:transform 220ms ease-out,border-color 220ms ease-out,box-shadow 220ms ease-out;}
.cat-card:hover{transform:translateY(-4px);border-color:rgba(47,216,198,.45);box-shadow:0 16px 36px -18px rgba(47,216,198,.45);}
.cat-card h3{font-size:17px;font-weight:600;margin-top:14px;color:var(--text-1);}
.cat-card p{font-size:13px;color:var(--text-2);margin-top:8px;line-height:1.75;}
.cat-card .arrow{display:inline-flex;align-items:center;gap:6px;font-size:13px;color:var(--primary);margin-top:14px;}
@media (max-width:1024px){.cat-grid{grid-template-columns:1fr 1fr;}}
@media (max-width:520px){.cat-grid{grid-template-columns:1fr;}}

/* ---------- CTA ---------- */
.cta-band{
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
  padding:34px 32px;border-radius:var(--radius-l);
  border:1px solid var(--line);background:linear-gradient(120deg,rgba(18,28,48,.9),rgba(12,20,36,.75));
  backdrop-filter:blur(14px);position:relative;overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;right:-80px;top:-90px;width:320px;height:320px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,122,69,.22),transparent 68%);
}
.cta-band h2{font-size:26px;font-weight:700;line-height:1.35;}
.cta-band p{font-size:14px;color:var(--text-2);margin-top:10px;max-width:600px;}
@media (max-width:768px){.cta-band{padding:26px 20px;}.cta-band h2{font-size:21px;}}

/* ---------- FAQ ---------- */
.faq-list{display:grid;grid-template-columns:1fr 1fr;gap:14px;}
.faq-item{border:1px solid var(--line);border-radius:var(--radius-m);background:var(--glass);overflow:hidden;transition:border-color 200ms ease-out;}
.faq-item[open]{border-color:rgba(47,216,198,.42);}
.faq-item summary{
  list-style:none;cursor:pointer;padding:18px 20px;font-size:15px;font-weight:600;color:var(--text-1);
  display:flex;align-items:center;justify-content:space-between;gap:14px;transition:color 180ms ease-out;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:var(--primary);}
.faq-item summary:focus-visible{outline:2px solid var(--primary);outline-offset:-2px;}
.faq-item summary::after{content:"+";font-size:19px;color:var(--primary);flex:0 0 auto;transition:transform 200ms ease-out;}
.faq-item[open] summary::after{transform:rotate(45deg);}
.faq-item p{padding:0 20px 20px;font-size:14px;color:var(--text-2);line-height:1.85;}
@media (max-width:1024px){.faq-list{grid-template-columns:1fr;}}

/* ---------- footer ---------- */
.site-footer{background:var(--bg-1);border-top:1px solid var(--line);margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.3fr;gap:36px;padding-top:64px;padding-bottom:44px;}
.footer-title{font-size:14px;font-weight:600;color:var(--primary);margin-bottom:16px;}
.footer-link{display:block;font-size:14px;color:var(--text-2);padding:5px 0;transition:color 160ms ease-out,transform 160ms ease-out;}
.footer-link:hover{color:var(--primary);transform:translateX(2px);}
.footer-note{font-size:13px;color:var(--text-2);line-height:1.85;margin-top:14px;}
.footer-contact{font-size:13px;color:var(--text-3);margin-top:10px;line-height:1.9;}
.subscribe{display:flex;gap:8px;margin-top:16px;}
.field{
  width:100%;padding:11px 14px;font-size:14px;border-radius:var(--radius-s);
  background:var(--bg-2);border:1px solid var(--line);color:var(--text-1);outline:none;
  transition:border-color 180ms ease-out,box-shadow 180ms ease-out;
}
.field::placeholder{color:var(--text-3);}
.field:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(47,216,198,.18);}
.field:disabled{opacity:.5;cursor:not-allowed;}
.footer-bottom{
  border-top:1px solid var(--line);padding-top:20px;padding-bottom:26px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--text-3);
}
.footer-bottom a{color:var(--text-3);}
.footer-bottom a:hover{color:var(--primary);}
@media (max-width:1024px){.footer-grid{grid-template-columns:1fr 1fr;gap:28px;}}
@media (max-width:520px){.footer-grid{grid-template-columns:1fr;padding-top:44px;}}

/* ---------- 返回顶部 ---------- */
.to-top{
  position:fixed;right:20px;bottom:24px;z-index:70;
  width:46px;height:46px;border-radius:999px;display:flex;align-items:center;justify-content:center;
  background:var(--glass);border:1px solid var(--line);color:var(--text-2);
  backdrop-filter:blur(12px);cursor:pointer;opacity:0;visibility:hidden;transform:translateY(10px);
  transition:all 240ms ease-out;
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{color:var(--primary);border-color:rgba(47,216,198,.5);box-shadow:0 0 0 1px rgba(47,216,198,.3),0 8px 24px -8px var(--glow);}

/* ---------- 移动抽屉 ---------- */
.drawer-mask{
  position:fixed;inset:0;background:rgba(4,8,16,.66);backdrop-filter:blur(3px);
  opacity:0;visibility:hidden;transition:opacity 240ms ease-out;z-index:80;
}
.drawer-mask.show{opacity:1;visibility:visible;}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:312px;max-width:86vw;z-index:90;
  background:var(--bg-1);border-left:1px solid var(--line);
  transform:translateX(102%);transition:transform 260ms ease-out;
  padding:20px;overflow-y:auto;
}
.drawer.show{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px;}
.drawer-group-title{font-size:12px;color:var(--text-3);letter-spacing:.08em;margin:18px 0 8px;}
.drawer-link{display:flex;align-items:center;justify-content:space-between;padding:12px 12px;font-size:15px;color:var(--text-2);border-radius:var(--radius-s);}
.drawer-link:hover,.drawer-link.active{color:var(--primary);background:rgba(47,216,198,.08);}
.menu-btn{display:none;}
@media (max-width:1024px){
  .nav-list,.nav-actions .icon-btn.desk-only{display:none;}
  .menu-btn{display:inline-flex;}
}

/* roulang page: article */
:root{
  --bg-0:#070C18; --bg-1:#0C1424; --bg-2:#121C30;
  --line:rgba(120,200,255,0.14);
  --primary:#2FD8C6; --primary-2:#35B8FF;
  --accent:#FF7A45; --accent-2:#FFB020;
  --text-1:#E8F1FA; --text-2:#9FB3C8; --text-3:#64798F;
  --glow:rgba(47,216,198,0.45);
  --glass:rgba(18,28,48,0.55);
  --radius-s:10px; --radius-m:16px; --radius-l:24px;
  --shadow-card:0 12px 32px -12px rgba(0,0,0,.7);
  --shadow-glow:0 0 0 1px rgba(47,216,198,.35), 0 8px 28px -6px var(--glow);
  --ease:220ms ease-out;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Noto Sans SC","Inter",system-ui,sans-serif;
  font-size:16px;line-height:1.85;font-weight:400;
  color:var(--text-1);
  background-color:var(--bg-0);
  background-image:
    radial-gradient(900px 480px at 10% -10%, rgba(47,216,198,.16), transparent 70%),
    radial-gradient(760px 420px at 96% 4%, rgba(53,184,255,.10), transparent 72%),
    linear-gradient(180deg,#070C18 0%,#08101F 55%,#070C18 100%);
  background-attachment:fixed;
  overflow-x:hidden;
}
body::before{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:0;opacity:.35;
  background-image:linear-gradient(rgba(120,200,255,.05) 1px, transparent 1px),
                   linear-gradient(90deg, rgba(120,200,255,.05) 1px, transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(circle at 30% 0%, #000 0%, transparent 70%);
  -webkit-mask-image:radial-gradient(circle at 30% 0%, #000 0%, transparent 70%);
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button,input,textarea,select{font:inherit;color:inherit;}
h1,h2,h3,h4,p,ul,ol{margin:0;}
ul,ol{padding:0;}
:focus-visible{outline:2px solid var(--primary);outline-offset:3px;border-radius:6px;}
::selection{background:rgba(47,216,198,.3);}
::-webkit-scrollbar{width:10px;height:10px;}
::-webkit-scrollbar-track{background:var(--bg-0);}
::-webkit-scrollbar-thumb{background:rgba(47,216,198,.25);border-radius:999px;border:2px solid var(--bg-0);}
::-webkit-scrollbar-thumb:hover{background:rgba(47,216,198,.45);}

.site-container{max-width:1240px;margin:0 auto;padding:0 20px;position:relative;z-index:1;}

/* ---------- header / nav ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(7,12,24,0);
  border-bottom:1px solid transparent;
  transition:background .3s ease,backdrop-filter .3s ease,border-color .3s ease;
}
.site-header.is-stuck{
  background:rgba(7,12,24,.85);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom-color:var(--line);
}
.nav-wrap{display:flex;align-items:center;gap:24px;height:74px;position:relative;}
.brand{display:inline-flex;align-items:center;gap:11px;font-size:17px;font-weight:700;color:var(--text-1);white-space:nowrap;}
.brand-mark{
  width:24px;height:24px;border-radius:7px;border:1.6px solid var(--primary);
  transform:rotate(45deg);position:relative;flex:none;
  box-shadow:0 0 14px -2px rgba(47,216,198,.6);
}
.brand-mark::after{
  content:"";position:absolute;inset:5px;border-radius:3px;
  background:linear-gradient(135deg,var(--primary),var(--primary-2));opacity:.9;
}
.nav-list{display:flex;align-items:center;gap:2px;margin-left:auto;}
.nav-item{position:relative;}
.nav-link{
  display:inline-flex;align-items:center;gap:6px;
  padding:9px 13px;border-radius:var(--radius-s);
  font-size:15px;font-weight:500;color:var(--text-2);
  transition:color var(--ease),background var(--ease);
}
.nav-link:hover{color:var(--text-1);background:rgba(47,216,198,.08);}
.nav-link.is-active{color:var(--primary);box-shadow:inset 0 -2px 0 var(--primary);}
.nav-link svg{opacity:.7;transition:transform var(--ease);}
.has-mega:hover .nav-link svg,.has-mega:focus-within .nav-link svg{transform:rotate(180deg);}

.mega{
  position:absolute;left:50%;top:calc(100% + 12px);width:min(820px,88vw);
  transform:translateX(-50%) translateY(8px);
  display:grid;grid-template-columns:1fr 1fr 1.15fr;gap:22px;
  padding:24px;border-radius:var(--radius-l);
  background:var(--glass);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border:1px solid var(--line);box-shadow:var(--shadow-card);
  opacity:0;visibility:hidden;pointer-events:none;
  transition:opacity .2s ease-out,transform .2s ease-out,visibility .2s;
}
.mega::before{
  content:"";position:absolute;left:0;right:0;top:0;height:3px;border-radius:var(--radius-l) var(--radius-l) 0 0;
  background:linear-gradient(90deg,var(--primary),var(--primary-2) 45%,transparent);
}
.has-mega:hover .mega,.has-mega:focus-within .mega{
  opacity:1;visibility:visible;pointer-events:auto;transform:translateX(-50%) translateY(0);
}
.mega-col-title{font-size:12px;font-weight:600;color:var(--primary);letter-spacing:.06em;margin-bottom:12px;}
.mega-link{
  display:flex;align-items:center;gap:9px;padding:7px 8px;border-radius:var(--radius-s);
  font-size:14px;color:var(--text-2);transition:var(--ease);
}
.mega-link:hover{color:var(--primary);background:rgba(47,216,198,.08);transform:translateX(2px);}
.mega-dot{width:6px;height:6px;border-radius:50%;background:var(--primary);opacity:.75;flex:none;}
.mega-post{display:block;padding:8px 8px;border-radius:var(--radius-s);transition:var(--ease);}
.mega-post:hover{background:rgba(47,216,198,.08);transform:translateX(2px);}
.mega-post b{display:block;font-size:14px;font-weight:500;color:var(--text-1);line-height:1.5;
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.mega-post span{font-size:12px;color:var(--text-3);}
.mega-card{
  display:block;border-radius:var(--radius-m);overflow:hidden;border:1px solid var(--line);
  background:rgba(12,20,36,.6);transition:var(--ease);
}
.mega-card:hover{border-color:rgba(47,216,198,.4);transform:translateY(-3px);}
.mega-card img{aspect-ratio:16/9;object-fit:cover;width:100%;}
.mega-card-body{padding:12px 14px 14px;}
.mega-card-body b{display:block;font-size:14px;font-weight:600;margin-bottom:4px;}
.mega-card-body span{font-size:12px;color:var(--text-3);line-height:1.7;}
.mega-card-body em{font-style:normal;display:inline-block;margin-top:8px;font-size:12px;color:var(--primary);}

.nav-actions{display:flex;align-items:center;gap:10px;}
.nav-search{
  display:flex;align-items:center;gap:8px;height:38px;padding:0 14px;border-radius:999px;
  background:rgba(18,28,48,.6);border:1px solid var(--line);color:var(--text-3);font-size:13px;
  transition:var(--ease);
}
.nav-search:hover{border-color:rgba(47,216,198,.4);color:var(--text-2);}
.nav-search svg{flex:none;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 20px;border-radius:999px;border:1px solid transparent;
  font-size:14px;font-weight:600;line-height:1;cursor:pointer;
  transition:transform var(--ease),background var(--ease),border-color var(--ease),color var(--ease),box-shadow var(--ease);
}
.btn-sm{padding:9px 16px;font-size:13px;}
.btn-primary{background:var(--accent);color:#1E0E05;box-shadow:0 10px 26px -10px rgba(255,122,69,.8);}
.btn-primary:hover{background:#FF8D5C;transform:translateY(-2px);box-shadow:0 14px 30px -10px rgba(255,122,69,.9);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{background:var(--glass);border-color:var(--line);color:var(--text-1);}
.btn-ghost:hover{border-color:rgba(47,216,198,.5);color:var(--primary);transform:translateY(-2px);}
.btn:disabled,.btn.is-disabled{opacity:.5;cursor:not-allowed;transform:none;}

.nav-toggle-input{position:absolute;opacity:0;width:1px;height:1px;pointer-events:none;}
.nav-toggle{display:none;}
.nav-drawer-close{display:none;}

/* ---------- breadcrumb ---------- */
.breadcrumb{
  display:flex;align-items:center;gap:8px;flex-wrap:wrap;
  padding:22px 0 0;font-size:13px;color:var(--text-3);
}
.breadcrumb a{color:var(--text-2);transition:color var(--ease);}
.breadcrumb a:hover{color:var(--primary);}
.breadcrumb .sep{color:var(--text-3);opacity:.6;}
.breadcrumb .cur{color:var(--primary);max-width:320px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}

/* ---------- article head ---------- */
.article-head{padding:26px 0 34px;border-bottom:1px solid var(--line);margin-bottom:36px;}
.head-badge{
  display:inline-flex;align-items:center;gap:7px;padding:5px 13px;border-radius:999px;
  font-size:12px;font-weight:600;color:var(--primary);
  background:rgba(47,216,198,.08);border:1px solid rgba(47,216,198,.3);margin-bottom:16px;
}
.article-title{
  font-size:44px;line-height:1.25;font-weight:700;letter-spacing:0;
  max-width:900px;overflow-wrap:anywhere;
}
.article-meta{
  display:flex;align-items:center;gap:18px;flex-wrap:wrap;
  margin-top:18px;font-size:13px;color:var(--text-3);
}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--text-3);opacity:.6;}
.article-lead{
  margin-top:20px;max-width:820px;font-size:17px;line-height:1.9;color:var(--text-2);
  padding-left:18px;border-left:3px solid var(--primary);
}

/* ---------- layout ---------- */
.article-shell{display:grid;grid-template-columns:minmax(0,1fr);gap:44px;align-items:start;}
.article-main{min-width:0;max-width:820px;}

/* ---------- article body ---------- */
.article-body{font-size:16.5px;line-height:1.9;color:#D6E4F0;overflow-wrap:anywhere;}
.article-body p{margin:0 0 1.3em;}
.article-body h2{
  position:relative;font-size:26px;line-height:1.4;font-weight:700;color:var(--text-1);
  margin:44px 0 18px;padding-left:16px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.28em;bottom:.28em;width:3px;border-radius:2px;
  background:linear-gradient(180deg,var(--primary),var(--primary-2));
}
.article-body h3{
  position:relative;font-size:20px;line-height:1.5;font-weight:600;color:var(--text-1);
  margin:30px 0 14px;padding-left:14px;
}
.article-body h3::before{
  content:"";position:absolute;left:0;top:.32em;bottom:.32em;width:3px;border-radius:2px;
  background:rgba(47,216,198,.55);
}
.article-body ul,.article-body ol{margin:0 0 1.3em;padding-left:22px;}
.article-body li{margin-bottom:10px;line-height:1.8;}
.article-body ul{list-style:none;padding-left:6px;}
.article-body ul>li{position:relative;padding-left:20px;}
.article-body ul>li::before{
  content:"";position:absolute;left:2px;top:.72em;width:7px;height:7px;border-radius:50%;
  background:var(--primary);box-shadow:0 0 0 4px rgba(47,216,198,.14);
}
.article-body ol{list-style:decimal;color:var(--primary);}
.article-body ol>li::marker{font-weight:600;color:var(--primary);}
.article-body ol>li>span,.article-body ol>li{color:#D6E4F0;}
.article-body a{color:var(--primary);border-bottom:1px dashed rgba(47,216,198,.5);transition:var(--ease);}
.article-body a:hover{color:var(--primary-2);border-bottom-color:var(--primary-2);}
.article-body strong{color:#F3F8FD;font-weight:600;}
.article-body blockquote{
  margin:26px 0;padding:20px 22px;border-radius:var(--radius-m);
  background:var(--glass);border-left:3px solid var(--primary);
  color:var(--text-2);font-size:15.5px;line-height:1.9;
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{border-radius:8px;margin:22px auto;height:auto;}
.article-body figure{margin:26px 0;}
.article-body figcaption{font-size:13px;color:var(--text-3);text-align:center;margin-top:10px;}
.article-body table{
  width:100%;border-collapse:collapse;margin:26px 0;font-size:14.5px;
  background:var(--bg-2);border-radius:var(--radius-m);overflow:hidden;
  display:block;overflow-x:auto;white-space:nowrap;
}
.article-body thead th{
  background:rgba(47,216,198,.10);color:var(--primary);font-weight:600;
  text-align:left;padding:13px 16px;border-bottom:1px solid var(--line);
}
.article-body tbody td{padding:12px 16px;border-bottom:1px solid rgba(120,200,255,.08);color:var(--text-2);}
.article-body tbody tr:nth-child(even){background:rgba(120,200,255,.03);}
.article-body pre{
  margin:24px 0;padding:18px 20px;border-radius:var(--radius-m);
  background:#0A1120;border:1px solid var(--line);overflow-x:auto;font-size:13.5px;line-height:1.75;
}
.article-body code{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  background:rgba(47,216,198,.10);color:var(--primary);
  padding:2px 6px;border-radius:6px;font-size:.9em;
}
.article-body pre code{background:none;color:#B9D6E8;padding:0;}
.article-body hr{border:none;height:1px;background:linear-gradient(90deg,transparent,var(--line),transparent);margin:38px 0;}

.empty-state{
  padding:64px 26px;text-align:center;border-radius:var(--radius-l);
  background:var(--glass);border:1px solid var(--line);
}
.empty-state svg{margin:0 auto 16px;color:var(--primary);opacity:.8;}
.empty-state h3{font-size:20px;font-weight:600;margin-bottom:10px;}
.empty-state p{color:var(--text-2);font-size:14px;margin-bottom:22px;}

/* ---------- aside ---------- */
.article-aside{display:none;}
.aside-card{
  padding:20px;border-radius:var(--radius-m);
  background:var(--glass);border:1px solid var(--line);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  box-shadow:var(--shadow-card);margin-bottom:18px;
}
.aside-title{font-size:14px;font-weight:600;color:var(--primary);margin-bottom:14px;}
.toc-link{
  display:flex;align-items:center;gap:8px;padding:7px 6px;border-radius:8px;
  font-size:13.5px;color:var(--text-2);transition:var(--ease);
}
.toc-link:hover{color:var(--primary);background:rgba(47,216,198,.08);transform:translateX(2px);}
.toc-link i{width:3px;height:14px;border-radius:2px;background:rgba(47,216,198,.4);font-style:normal;flex:none;}
.aside-post{display:block;padding:9px 6px;border-radius:8px;transition:var(--ease);}
.aside-post:hover{background:rgba(47,216,198,.08);transform:translateX(2px);}
.aside-post b{display:block;font-size:13.5px;font-weight:500;color:var(--text-1);line-height:1.6;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.aside-post span{font-size:12px;color:var(--text-3);}
.tag-cloud{display:flex;flex-wrap:wrap;gap:8px;}
.tag{
  display:inline-flex;align-items:center;padding:5px 12px;border-radius:999px;
  font-size:12px;color:var(--text-2);background:rgba(18,28,48,.7);
  border:1px solid var(--line);transition:var(--ease);
}
.tag:hover{color:var(--primary);border-color:rgba(47,216,198,.45);transform:translateY(-2px);}
.tag.is-accent{color:var(--accent-2);border-color:rgba(255,176,32,.35);}
.aside-sticky{position:sticky;top:96px;}

/* ---------- footer blocks ---------- */
.post-tags{margin:44px 0 0;padding-top:26px;border-top:1px solid var(--line);}
.post-tags p{font-size:13px;color:var(--text-3);margin-bottom:12px;}
.pager{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:26px;}
.pager-card{
  display:block;padding:18px 20px;border-radius:var(--radius-m);
  background:var(--glass);border:1px solid var(--line);transition:var(--ease);
}
.pager-card:hover{transform:translateY(-4px);border-color:rgba(47,216,198,.4);box-shadow:var(--shadow-glow);}
.pager-card span{display:block;font-size:12px;color:var(--text-3);margin-bottom:6px;}
.pager-card b{display:block;font-size:15px;font-weight:600;line-height:1.6;}
.pager-card.is-next{text-align:right;}

.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:24px;flex-wrap:wrap;}
.section-title{font-size:24px;font-weight:700;line-height:1.35;}
.section-desc{font-size:14px;color:var(--text-2);margin-top:8px;}
.link-more{font-size:14px;font-weight:500;color:var(--primary);display:inline-flex;align-items:center;gap:6px;transition:var(--ease);}
.link-more:hover{gap:10px;color:var(--primary-2);}

.related{margin-top:56px;}
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;}
.card{
  display:block;border-radius:var(--radius-m);overflow:hidden;
  background:var(--glass);border:1px solid var(--line);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease);
}
.card:hover{transform:translateY(-4px);border-color:rgba(47,216,198,.35);box-shadow:var(--shadow-glow);}
.card-media{position:relative;aspect-ratio:16/10;overflow:hidden;background:linear-gradient(140deg,#101B2E,#0A1220);}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease;}
.card:hover .card-media img{transform:scale(1.05);}
.card-media .ph{
  position:absolute;inset:0;display:flex;align-items:center;justify-content:center;
  font-size:34px;font-weight:700;color:rgba(47,216,198,.35);
}
.badge{
  position:absolute;left:12px;top:12px;padding:4px 11px;border-radius:999px;
  font-size:11.5px;font-weight:600;color:var(--primary);
  background:rgba(7,12,24,.75);border:1px solid rgba(47,216,198,.4);backdrop-filter:blur(6px);
}
.card-body{padding:16px 18px 20px;}
.card-body h3{font-size:16px;font-weight:600;line-height:1.55;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.card-body p{margin-top:8px;font-size:13.5px;color:var(--text-2);line-height:1.75;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.card-foot{display:flex;align-items:center;justify-content:space-between;margin-top:14px;font-size:12px;color:var(--text-3);}
.card-foot em{font-style:normal;color:var(--primary);}

.back-entry{display:flex;gap:14px;flex-wrap:wrap;margin-top:34px;}

.cta-band{
  margin-top:64px;padding:34px 32px;border-radius:var(--radius-l);
  background:linear-gradient(120deg, rgba(47,216,198,.10), rgba(18,28,48,.6) 55%);
  border:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;
  gap:24px;flex-wrap:wrap;
}
.cta-band h3{font-size:22px;font-weight:700;line-height:1.4;}
.cta-band p{font-size:14px;color:var(--text-2);margin-top:8px;}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;}

/* ---------- footer ---------- */
.site-footer{margin-top:96px;background:var(--bg-1);border-top:1px solid var(--line);position:relative;z-index:1;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:36px;padding:56px 0 40px;}
.footer-note{font-size:13.5px;color:var(--text-2);line-height:1.85;margin-top:16px;max-width:360px;}
.footer-contact{font-size:13px;color:var(--text-3);line-height:1.9;margin-top:16px;}
.footer-title{font-size:14px;font-weight:600;color:var(--primary);margin-bottom:16px;}
.footer-link{display:block;font-size:14px;color:var(--text-2);padding:5px 0;transition:var(--ease);}
.footer-link:hover{color:var(--primary);transform:translateX(2px);}
.subscribe{display:flex;gap:10px;margin-top:14px;flex-wrap:wrap;}
.field{
  flex:1;min-width:150px;height:42px;padding:0 14px;border-radius:var(--radius-s);
  background:var(--bg-2);border:1px solid var(--line);color:var(--text-1);font-size:14px;
  transition:border-color var(--ease),box-shadow var(--ease);
}
.field::placeholder{color:var(--text-3);}
.field:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(47,216,198,.22);}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:20px 0 34px;border-top:1px solid var(--line);font-size:13px;color:var(--text-3);
}
.footer-bottom a{color:var(--text-3);transition:color var(--ease);}
.footer-bottom a:hover{color:var(--primary);}

.to-top{
  position:fixed;right:22px;bottom:26px;width:46px;height:46px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;z-index:70;
  background:rgba(18,28,48,.72);border:1px solid var(--line);color:var(--primary);
  backdrop-filter:blur(10px);cursor:pointer;opacity:0;visibility:hidden;
  transition:var(--ease);
}
.to-top.is-show{opacity:1;visibility:visible;}
.to-top:hover{box-shadow:var(--shadow-glow);transform:translateY(-3px);}

@media (min-width:1024px){
  .article-shell{grid-template-columns:minmax(0,1fr) 306px;}
  .article-aside{display:block;}
}
.mobile-toc-fold{display:block;margin-top:44px;}
@media (min-width:1024px){ .mobile-toc-fold{display:none;} }

@media (max-width:1024px){
  .nav-list{display:none;}
  .nav-search{display:none;}
  .nav-toggle{
    display:inline-flex;flex-direction:column;justify-content:center;gap:5px;
    width:42px;height:42px;border-radius:12px;cursor:pointer;
    background:rgba(18,28,48,.7);border:1px solid var(--line);padding:0 11px;
  }
  .nav-toggle span{display:block;height:2px;border-radius:2px;background:var(--text-1);transition:var(--ease);}
  .nav-wrap{gap:12px;}
  .nav-list{
    position:fixed;top:0;right:0;bottom:0;width:min(340px,86vw);z-index:90;
    display:flex;flex-direction:column;align-items:stretch;gap:4px;
    padding:80px 20px 28px;margin:0;overflow-y:auto;
    background:rgba(9,15,28,.97);backdrop-filter:blur(18px);
    border-left:1px solid var(--line);
    transform:translateX(105%);transition:transform .3s ease-out;
  }
  .nav-toggle-input:checked ~ .nav-list{transform:translateX(0);}
  .nav-drawer-close{
    display:flex;align-items:center;justify-content:center;
    position:absolute;top:20px;right:20px;width:38px;height:38px;border-radius:10px;
    border:1px solid var(--line);color:var(--text-2);font-size:18px;cursor:pointer;
  }
  .nav-item{width:100%;}
  .nav-link{width:100%;justify-content:space-between;padding:13px 12px;font-size:15px;}
  .mega{
    position:static;width:100%;transform:none;opacity:1;visibility:visible;pointer-events:auto;
    display:none;grid-template-columns:1fr;gap:16px;padding:14px;margin-top:6px;box-shadow:none;
  }
  .has-mega:hover .mega,.has-mega:focus-within .mega{display:grid;}
  .mega-card{display:none;}
  .article-title{font-size:30px;}
  .article-body h2{font-size:22px;}
  .article-body h3{font-size:18px;}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;padding:44px 0 30px;}
}
@media (max-width:640px){
  body{font-size:15px;}
  .site-container{padding:0 16px;}
  .article-title{font-size:26px;}
  .article-lead{font-size:15.5px;}
  .article-body{font-size:15.5px;}
  .article-body h2{font-size:20px;}
  .related-grid{grid-template-columns:1fr;}
  .pager{grid-template-columns:1fr;}
  .pager-card.is-next{text-align:left;}
  .footer-grid{grid-template-columns:1fr;}
  .cta-band{padding:26px 20px;}
  .cta-band h3{font-size:19px;}
  .breadcrumb .cur{max-width:180px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}

/* roulang page: category1 */
:root{
  --bg-0:#070C18;
  --bg-1:#0C1424;
  --bg-2:#121C30;
  --line:rgba(120,200,255,0.14);
  --primary:#2FD8C6;
  --primary-2:#35B8FF;
  --accent:#FF7A45;
  --accent-2:#FFB020;
  --text-1:#E8F1FA;
  --text-2:#9FB3C8;
  --text-3:#64798F;
  --glow:rgba(47,216,198,0.45);
  --glass:rgba(18,28,48,0.55);
  --radius-s:10px;
  --radius-m:16px;
  --radius-l:24px;
  --shadow-card:0 12px 32px -12px rgba(0,0,0,.7);
  --shadow-glow:0 0 0 1px rgba(47,216,198,.35),0 8px 28px -6px var(--glow);
  --ease:220ms ease-out;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background-color:var(--bg-0);
  background-image:
    radial-gradient(900px 520px at 12% -6%, rgba(47,216,198,.16), transparent 62%),
    radial-gradient(760px 460px at 92% 4%, rgba(53,184,255,.12), transparent 66%),
    linear-gradient(180deg, rgba(255,255,255,.02) 0 1px, transparent 1px 100%);
  background-size:auto,auto,100% 44px;
  color:var(--text-1);
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Noto Sans SC",Inter,system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;}
button,input{font:inherit;color:inherit;}
button{background:none;border:0;}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.25;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
::selection{background:rgba(47,216,198,.3);color:#fff;}
::-webkit-scrollbar{height:8px;width:8px;}
::-webkit-scrollbar-track{background:rgba(255,255,255,.03);}
::-webkit-scrollbar-thumb{background:rgba(47,216,198,.35);border-radius:999px;}
::-webkit-scrollbar-thumb:hover{background:rgba(47,216,198,.6);}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:4px;}

.site-container{width:100%;max-width:1240px;margin:0 auto;padding:0 20px;}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  border-bottom:1px solid transparent;
  transition:background var(--ease),border-color var(--ease),backdrop-filter var(--ease);
}
.site-header.is-stuck{
  background:rgba(7,12,24,.85);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border-bottom-color:var(--line);
}
.nav-wrap{display:flex;align-items:center;gap:16px;height:76px;}
.brand{display:inline-flex;align-items:center;gap:10px;font-size:18px;font-weight:700;color:var(--text-1);white-space:nowrap;transition:color var(--ease);}
.brand:hover{color:var(--primary);}
.brand-mark{
  position:relative;width:22px;height:22px;border-radius:7px;
  border:2px solid var(--primary);
  background:linear-gradient(135deg,rgba(47,216,198,.3),rgba(53,184,255,.06));
  box-shadow:0 0 18px -4px var(--glow);
  flex:0 0 auto;
}
.brand-mark::after{content:"";position:absolute;inset:6px;border-radius:3px;background:var(--primary);opacity:.85;}
.nav-list{display:flex;align-items:center;gap:2px;margin-left:auto;}
.nav-item{position:relative;}
.nav-link{
  display:inline-flex;align-items:center;gap:6px;
  padding:10px 14px;border-radius:var(--radius-s);
  font-size:15px;font-weight:500;color:var(--text-2);
  transition:color var(--ease),background var(--ease);
}
.nav-link:hover{color:var(--text-1);background:rgba(120,200,255,.07);}
.nav-link.is-active{color:var(--primary);}
.nav-link.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;border-radius:2px;
  background:var(--primary);box-shadow:0 0 10px var(--glow);
}
.nav-link svg{transition:transform var(--ease);}
.has-mega:hover .nav-link svg{transform:rotate(180deg);}

.mega{
  position:absolute;top:calc(100% + 10px);left:50%;
  transform:translate(-50%,8px);
  width:min(880px,86vw);
  display:grid;grid-template-columns:1fr 1fr 1.25fr;gap:24px;
  padding:24px;
  background:var(--glass);
  -webkit-backdrop-filter:blur(16px);
  backdrop-filter:blur(16px);
  border:1px solid var(--line);
  border-radius:var(--radius-l);
  box-shadow:var(--shadow-card);
  opacity:0;visibility:hidden;pointer-events:none;
  transition:opacity .2s ease,transform .2s ease,visibility .2s ease;
}
.mega::before{
  content:"";position:absolute;top:-1px;left:24px;right:24px;height:3px;border-radius:3px;
  background:linear-gradient(90deg,var(--primary),var(--primary-2),transparent);
}
.has-mega:hover .mega,.has-mega:focus-within .mega{opacity:1;visibility:visible;pointer-events:auto;transform:translate(-50%,0);}
.mega-col-title{font-size:14px;font-weight:600;color:var(--primary);margin-bottom:14px;}
.mega-link{display:flex;align-items:center;gap:9px;padding:8px 10px;border-radius:var(--radius-s);font-size:14px;color:var(--text-2);transition:all var(--ease);}
.mega-link:hover{color:var(--text-1);background:rgba(120,200,255,.08);transform:translateX(2px);}
.mega-dot{width:6px;height:6px;border-radius:999px;background:var(--primary);opacity:.7;flex:0 0 auto;}
.mega-post{display:block;padding:9px 10px;border-radius:var(--radius-s);transition:background var(--ease);}
.mega-post:hover{background:rgba(120,200,255,.08);}
.mega-post b{display:block;font-size:14px;font-weight:500;color:var(--text-1);line-height:1.55;}
.mega-post span{display:block;font-size:12px;color:var(--text-3);margin-top:3px;}
.mega-card{
  display:block;overflow:hidden;border-radius:var(--radius-m);
  border:1px solid var(--line);background:rgba(9,16,30,.7);
  transition:transform var(--ease),border-color var(--ease);
}
.mega-card:hover{transform:translateY(-3px);border-color:rgba(47,216,198,.35);}
.mega-card img{width:100%;aspect-ratio:16/9;object-fit:cover;background:linear-gradient(135deg,#16233c,#0a1120);}
.mega-card b{display:block;font-size:15px;font-weight:600;padding:12px 14px 0;}
.mega-card span{display:block;font-size:13px;color:var(--text-2);padding:6px 14px 0;line-height:1.6;}
.mega-card em{display:block;font-style:normal;font-size:13px;color:var(--primary);padding:10px 14px 14px;}

.nav-actions{display:flex;align-items:center;gap:10px;margin-left:6px;}
.icon-btn{
  width:38px;height:38px;display:inline-flex;align-items:center;justify-content:center;
  border-radius:999px;border:1px solid var(--line);background:rgba(18,28,48,.55);
  color:var(--text-2);cursor:pointer;transition:all var(--ease);
}
.icon-btn:hover{color:var(--primary);border-color:rgba(47,216,198,.4);transform:translateY(-1px);}
.icon-btn:active{transform:translateY(0);}
.nav-toggle{display:none;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:999px;border:1px solid transparent;
  font-size:15px;font-weight:600;line-height:1.2;cursor:pointer;white-space:nowrap;
  transition:transform var(--ease),box-shadow var(--ease),background var(--ease),border-color var(--ease),color var(--ease);
}
.btn-primary{
  background:linear-gradient(135deg,var(--accent),#ff9569);
  color:#1A0C04;
  box-shadow:0 8px 26px -12px rgba(255,122,69,.95),0 0 0 1px rgba(255,122,69,.35);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 32px -10px rgba(255,122,69,1),0 0 0 1px rgba(255,122,69,.55);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{background:rgba(18,28,48,.6);border-color:var(--line);color:var(--text-1);}
.btn-ghost:hover{border-color:rgba(47,216,198,.45);color:var(--primary);transform:translateY(-2px);}
.btn-s{padding:9px 18px;font-size:14px;}
.btn-block{width:100%;}
.btn[disabled]{opacity:.5;cursor:not-allowed;transform:none;}

/* ---------- hero ---------- */
.hero-lite{
  position:relative;overflow:hidden;
  padding:44px 0 60px;
  background-image:linear-gradient(180deg,rgba(7,12,24,.86),rgba(7,12,24,.96)),url(/assets/images/backpic/back-1.webp);
  background-size:cover;background-position:center;
  border-bottom:1px solid var(--line);
}
.hero-lite::before{
  content:"";position:absolute;top:-200px;left:-140px;width:560px;height:560px;
  background:radial-gradient(circle,rgba(47,216,198,.22),transparent 65%);
  pointer-events:none;
}
.hero-grid{position:relative;display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center;}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-3);margin-bottom:20px;}
.crumb a{color:var(--text-2);transition:color var(--ease);}
.crumb a:hover{color:var(--primary);}
.crumb .current{color:var(--primary);}
.hero-badges{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:18px;}
.hero-title{font-size:44px;font-weight:700;line-height:1.25;}
.hero-title span{background:linear-gradient(100deg,var(--primary),var(--primary-2));-webkit-background-clip:text;background-clip:text;color:transparent;}
.hero-sub{font-size:17px;color:var(--text-2);margin-top:16px;max-width:560px;line-height:1.8;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px;}
.hero-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:32px;}
.stat{
  padding:14px 16px;border-radius:var(--radius-m);
  border:1px solid var(--line);background:rgba(18,28,48,.5);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
}
.stat b{display:block;font-size:22px;font-weight:700;color:var(--primary);line-height:1.3;}
.stat span{display:block;font-size:13px;color:var(--text-2);margin-top:4px;}
.hero-visual{position:relative;}
.hero-visual img{width:100%;aspect-ratio:16/11;object-fit:cover;border-radius:var(--radius-l);border:1px solid var(--line);box-shadow:var(--shadow-card);background:linear-gradient(135deg,#16233c,#0a1120);}
.float-card{
  position:absolute;left:-18px;bottom:-22px;width:min(280px,84%);
  padding:16px 18px;border-radius:var(--radius-m);
  border:1px solid var(--line);background:rgba(12,20,36,.88);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  box-shadow:var(--shadow-card);
}
.float-card .fc-label{font-size:12px;color:var(--text-3);}
.float-card .fc-title{font-size:16px;font-weight:600;margin-top:6px;}
.float-card .fc-price{font-size:19px;font-weight:700;color:var(--accent-2);margin-top:8px;}
.float-card .fc-price small{font-size:12px;color:var(--text-3);font-weight:400;}

/* ---------- sections ---------- */
.section{padding:82px 0;}
.section-tight{padding:56px 0 82px;}
.hairline{height:1px;background:linear-gradient(90deg,transparent,var(--line) 18%,var(--line) 82%,transparent);}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:26px;margin-bottom:34px;flex-wrap:wrap;}
.sec-title{font-size:32px;font-weight:700;}
.sec-desc{font-size:15px;color:var(--text-2);margin-top:12px;max-width:660px;line-height:1.8;}
.sec-link{font-size:14px;color:var(--primary);display:inline-flex;align-items:center;gap:6px;transition:gap var(--ease);}
.sec-link:hover{gap:10px;}

/* ---------- filter ---------- */
.filter-bar{
  display:flex;flex-wrap:wrap;gap:10px;padding:14px;
  border-radius:var(--radius-l);border:1px solid var(--line);
  background:var(--glass);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  margin-bottom:30px;
}
.chip{
  padding:8px 17px;border-radius:999px;font-size:14px;color:var(--text-2);
  border:1px solid transparent;background:rgba(255,255,255,.03);
  transition:all var(--ease);cursor:pointer;
}
.chip:hover{color:var(--text-1);border-color:var(--line);}
.chip.is-on{background:var(--primary);color:#04211E;font-weight:600;box-shadow:0 6px 20px -8px var(--glow);}

/* ---------- cards / grid ---------- */
.card{
  display:flex;flex-direction:column;height:100%;overflow:hidden;
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--radius-m);
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  box-shadow:var(--shadow-card);
  transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease);
}
.card:hover{
  transform:translateY(-4px);
  border-color:rgba(47,216,198,.3);
  box-shadow:0 18px 40px -20px rgba(0,0,0,.95),0 0 0 1px rgba(47,216,198,.18);
}
.card-media{position:relative;aspect-ratio:16/10;overflow:hidden;background:linear-gradient(135deg,#16233c,#0a1120 70%);}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform 420ms ease-out;}
.card:hover .card-media img{transform:scale(1.05);}
.card-body{padding:18px;display:flex;flex-direction:column;gap:10px;flex:1;}
.card-top{display:flex;align-items:center;justify-content:space-between;gap:10px;}
.card-title{font-size:19px;font-weight:600;line-height:1.45;}
.card-text{font-size:14px;color:var(--text-2);line-height:1.75;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.price{display:flex;align-items:baseline;gap:6px;color:var(--accent-2);font-weight:700;font-size:19px;}
.price small{font-size:12px;color:var(--text-3);font-weight:400;}
.card-foot{margin-top:auto;padding-top:6px;}

.svc-grid{display:grid;grid-template-columns:1.25fr 1fr 1fr;gap:20px;}
.card-feature{grid-column:1;grid-row:span 3;}
.card-feature .card-media{aspect-ratio:auto;flex:1;min-height:280px;}
.card-feature .card-title{font-size:24px;}
.card-feature .card-text{-webkit-line-clamp:3;font-size:15px;}
.feature-list{display:flex;flex-direction:column;gap:8px;margin-top:4px;}
.feature-list li{display:flex;gap:9px;align-items:flex-start;font-size:14px;color:var(--text-2);line-height:1.7;}
.feature-list li::before{content:"";width:6px;height:6px;border-radius:999px;background:var(--primary);margin-top:9px;flex:0 0 auto;}

.badge{
  display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:999px;
  font-size:12px;font-weight:500;color:var(--text-2);
  border:1px solid var(--line);background:rgba(18,28,48,.6);
}
.badge-primary{border-color:rgba(47,216,198,.4);color:var(--primary);}
.badge-accent{border-color:rgba(255,122,69,.4);color:var(--accent-2);}

/* ---------- split ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;}
.split + .split{margin-top:72px;}
.split.reverse .split-media{order:2;}
.split-media img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--radius-l);border:1px solid var(--line);background:linear-gradient(135deg,#16233c,#0a1120);}
.split-body h3{font-size:26px;font-weight:700;line-height:1.35;}
.split-body p{font-size:15px;color:var(--text-2);margin-top:14px;line-height:1.9;}
.split-points{margin-top:18px;display:flex;flex-direction:column;gap:12px;}
.split-points li{display:flex;gap:10px;align-items:flex-start;font-size:15px;color:var(--text-1);}
.split-points li::before{content:"";width:7px;height:7px;border-radius:999px;background:var(--primary);box-shadow:0 0 10px var(--glow);margin-top:10px;flex:0 0 auto;}

/* ---------- reviews ---------- */
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.review-card{
  padding:22px;border-radius:var(--radius-m);border:1px solid var(--line);
  background:var(--glass);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  display:flex;flex-direction:column;gap:12px;height:100%;
  transition:transform var(--ease),border-color var(--ease);
}
.review-card:hover{transform:translateY(-4px);border-color:rgba(47,216,198,.3);}
.review-head{display:flex;align-items:center;gap:12px;}
.avatar{
  width:42px;height:42px;border-radius:999px;flex:0 0 auto;
  display:flex;align-items:center;justify-content:center;
  font-size:15px;font-weight:600;color:#04211E;
  background:linear-gradient(135deg,var(--primary),var(--primary-2));
}
.review-name{font-size:15px;font-weight:600;}
.review-role{font-size:12px;color:var(--text-3);}
.stars{color:var(--accent-2);font-size:14px;letter-spacing:2px;}
.review-text{font-size:14px;color:var(--text-2);line-height:1.85;}

/* ---------- guarantee ---------- */
.guard{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:rgba(12,20,36,.6);}
.guard-item{padding:28px 24px;border-right:1px solid var(--line);}
.guard-item:last-child{border-right:0;}
.guard-icon{width:34px;height:34px;color:var(--primary);margin-bottom:12px;}
.guard-item h4{font-size:16px;font-weight:600;}
.guard-item p{font-size:13px;color:var(--text-2);margin-top:8px;line-height:1.7;}

/* ---------- rail / news ---------- */
.rail{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
.news-card{
  display:flex;gap:16px;padding:18px;border-radius:var(--radius-m);
  border:1px solid var(--line);background:var(--glass);
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  transition:transform var(--ease),border-color var(--ease);
}
.news-card:hover{transform:translateY(-4px);border-color:rgba(47,216,198,.3);}
.date-block{
  flex:0 0 auto;width:56px;text-align:center;padding:8px 0;border-radius:var(--radius-s);
  border:1px solid var(--line);background:rgba(9,16,30,.75);
}
.date-block b{display:block;font-size:20px;font-weight:700;color:var(--primary);line-height:1.2;}
.date-block span{display:block;font-size:11px;color:var(--text-3);}
.news-body{display:flex;flex-direction:column;gap:7px;}
.news-title{font-size:15px;font-weight:600;line-height:1.5;transition:color var(--ease);}
.news-card:hover .news-title{color:var(--primary);}
.news-text{font-size:13px;color:var(--text-2);line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}

/* ---------- cta ---------- */
.cta-band{
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
  padding:34px 36px;border-radius:var(--radius-l);border:1px solid var(--line);
  background:linear-gradient(120deg,rgba(47,216,198,.12),rgba(255,122,69,.12)),var(--glass);
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  box-shadow:var(--shadow-card);
}
.cta-band h3{font-size:26px;font-weight:700;}
.cta-band p{font-size:14px;color:var(--text-2);margin-top:10px;max-width:620px;line-height:1.8;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;}

/* ---------- footer ---------- */
.site-footer{background:var(--bg-1);border-top:1px solid var(--line);margin-top:20px;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:36px;padding:56px 0 36px;}
.footer-note{font-size:13px;color:var(--text-2);line-height:1.9;margin-top:14px;max-width:330px;}
.footer-contact{font-size:13px;color:var(--text-3);margin-top:14px;line-height:1.9;}
.footer-title{font-size:14px;font-weight:600;color:var(--primary);margin-bottom:16px;}
.footer-link{display:block;font-size:14px;color:var(--text-2);padding:5px 0;transition:color var(--ease),transform var(--ease);}
.footer-link:hover{color:var(--primary);transform:translateX(2px);}
.subscribe{display:flex;gap:8px;margin-top:12px;flex-wrap:wrap;}
.field{
  flex:1 1 150px;min-width:0;padding:10px 14px;border-radius:var(--radius-s);
  background:var(--bg-2);border:1px solid var(--line);color:var(--text-1);
  font-size:14px;transition:border-color var(--ease),box-shadow var(--ease);
}
.field::placeholder{color:var(--text-3);}
.field:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(47,216,198,.18);}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:20px 0 28px;border-top:1px solid var(--line);font-size:13px;color:var(--text-3);
}
.footer-bottom a{color:var(--text-3);transition:color var(--ease);}
.footer-bottom a:hover{color:var(--primary);}

/* ---------- to top / drawer ---------- */
.to-top{
  position:fixed;right:22px;bottom:26px;z-index:70;
  width:44px;height:44px;border-radius:999px;
  display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);background:rgba(12,20,36,.85);color:var(--text-2);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  cursor:pointer;opacity:0;visibility:hidden;transform:translateY(10px);
  transition:all var(--ease);
}
.to-top.is-on{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{color:var(--primary);border-color:rgba(47,216,198,.5);box-shadow:0 0 0 1px rgba(47,216,198,.35),0 8px 28px -6px var(--glow);}
.drawer-mask{position:fixed;inset:0;background:rgba(4,8,16,.62);opacity:0;visibility:hidden;transition:opacity .25s ease,visibility .25s ease;z-index:80;}
.drawer-mask.is-open{opacity:1;visibility:visible;}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(330px,86vw);z-index:90;
  background:rgba(9,15,28,.98);border-left:1px solid var(--line);
  -webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);
  transform:translateX(100%);transition:transform .25s ease;
  padding:22px;overflow-y:auto;
}
.drawer.is-open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px;}
.drawer-link{display:block;padding:13px 12px;border-radius:var(--radius-s);font-size:15px;color:var(--text-2);border-bottom:1px solid rgba(120,200,255,.08);transition:all var(--ease);}
.drawer-link:hover,.drawer-link.is-active{color:var(--primary);background:rgba(120,200,255,.07);}
.drawer .btn{margin-top:22px;}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .nav-list{display:none;}
  .nav-toggle{display:inline-flex;}
  .nav-actions .btn-primary{display:none;}
  .hero-grid{grid-template-columns:1fr;gap:34px;}
  .hero-title{font-size:34px;}
  .svc-grid{grid-template-columns:1fr 1fr;}
  .card-feature{grid-column:span 2;grid-row:auto;}
  .card-feature .card-media{aspect-ratio:16/10;min-height:0;}
  .review-grid{grid-template-columns:1fr 1fr;}
  .guard{grid-template-columns:1fr 1fr;}
  .guard-item:nth-child(2){border-right:0;}
  .guard-item:nth-child(1),.guard-item:nth-child(2){border-bottom:1px solid var(--line);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px;}
  .rail{grid-template-columns:1fr 1fr;}
  .float-card{left:0;}
}
@media (max-width:768px){
  body{font-size:15px;}
  .site-container{padding:0 16px;}
  .section{padding:56px 0;}
  .section-tight{padding:40px 0 56px;}
  .hero-lite{padding:26px 0 46px;}
  .hero-title{font-size:30px;}
  .hero-sub{font-size:15px;}
  .sec-title{font-size:24px;}
  .split{grid-template-columns:1fr;gap:26px;}
  .split.reverse .split-media{order:0;}
  .split + .split{margin-top:52px;}
  .split-body h3{font-size:21px;}
  .svc-grid{grid-template-columns:1fr;}
  .card-feature{grid-column:span 1;}
  .review-grid{grid-template-columns:1fr;}
  .rail{display:flex;overflow-x:auto;scroll-snap-type:x mandatory;gap:14px;padding-bottom:10px;}
  .rail .news-card{flex:0 0 84%;scroll-snap-align:start;}
  .cta-band{padding:26px 22px;}
  .cta-band h3{font-size:21px;}
  .footer-grid{grid-template-columns:1fr;padding:40px 0 26px;}
  .hero-stats{grid-template-columns:1fr 1fr;gap:10px;}
  .float-card{position:static;width:100%;margin-top:14px;left:auto;bottom:auto;}
}
@media (max-width:520px){
  .hero-title{font-size:26px;}
  .hero-stats{grid-template-columns:1fr;}
  .guard{grid-template-columns:1fr;}
  .guard-item{border-right:0;border-bottom:1px solid var(--line);}
  .guard-item:last-child{border-bottom:0;}
  .btn{width:100%;}
  .hero-actions .btn,.cta-actions .btn{width:100%;}
  .card-title{font-size:18px;}
}

/* roulang page: category2 */
:root{
  --bg-0:#070C18; --bg-1:#0C1424; --bg-2:#121C30;
  --line:rgba(120,200,255,0.14);
  --primary:#2FD8C6; --primary-2:#35B8FF; --accent:#FF7A45; --accent-2:#FFB020;
  --text-1:#E8F1FA; --text-2:#9FB3C8; --text-3:#64798F;
  --glow:rgba(47,216,198,0.45);
  --glass:rgba(18,28,48,0.55);
  --radius-s:10px; --radius-m:16px; --radius-l:24px;
  --shadow-card:0 12px 32px -12px rgba(0,0,0,.7);
  --shadow-glow:0 0 0 1px rgba(47,216,198,.35), 0 8px 28px -6px var(--glow);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg-0);color:var(--text-1);
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Noto Sans SC",Inter,system-ui,sans-serif;
  font-size:16px;line-height:1.85;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none;transition:color .22s ease,background-color .22s ease,border-color .22s ease}
button,input{font:inherit}
button{border:0;background:none;color:inherit;cursor:pointer}
h1,h2,h3,h4,p{margin:0}
ul{margin:0}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:4px}
::selection{background:rgba(47,216,198,.32);color:#fff}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:var(--bg-1)}
::-webkit-scrollbar-thumb{background:#22304a;border-radius:10px}
::-webkit-scrollbar-thumb:hover{background:#2c3d5c}

.site-container{max-width:1240px;margin:0 auto;padding:0 20px;position:relative;z-index:2}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:60;
  background:linear-gradient(180deg,rgba(7,12,24,.85),rgba(7,12,24,0));
  transition:background .25s ease,border-color .25s ease,box-shadow .25s ease;
  border-bottom:1px solid transparent;
}
.site-header.is-scrolled{
  background:rgba(7,12,24,.85);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom-color:var(--line);
  box-shadow:0 10px 30px -18px rgba(0,0,0,.9);
}
.nav-wrap{display:flex;align-items:center;gap:26px;height:72px}
.brand{display:inline-flex;align-items:center;gap:10px;font-size:17px;font-weight:700;color:var(--text-1);letter-spacing:0;white-space:nowrap}
.brand-mark{
  width:26px;height:26px;border-radius:9px;position:relative;flex:0 0 auto;
  border:1.5px solid rgba(47,216,198,.85);
  background:radial-gradient(circle at 30% 25%,rgba(47,216,198,.35),rgba(53,184,255,.06) 70%);
}
.brand-mark::after{content:"";position:absolute;inset:7px;border-radius:3px;background:linear-gradient(135deg,var(--primary),var(--primary-2))}
.nav-list{display:flex;align-items:center;gap:2px;margin-left:auto}
.nav-item{position:relative}
.nav-link{
  display:inline-flex;align-items:center;gap:6px;padding:10px 14px;border-radius:10px;
  font-size:15px;font-weight:500;color:var(--text-2);position:relative;white-space:nowrap;
}
.nav-link:hover{color:var(--text-1);background:rgba(47,216,198,.07)}
.nav-link.is-active{color:var(--text-1)}
.nav-link.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:3px;height:2px;border-radius:2px;
  background:var(--primary);box-shadow:0 0 10px var(--glow);
}
.nav-actions{display:flex;align-items:center;gap:10px}
.icon-btn{
  width:40px;height:40px;border-radius:12px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);background:var(--glass);color:var(--text-2);transition:.22s ease;
}
.icon-btn:hover{color:var(--primary);border-color:rgba(47,216,198,.45)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 22px;border-radius:12px;font-size:15px;font-weight:600;line-height:1.2;
  transition:transform .22s ease,box-shadow .22s ease,background-color .22s ease,color .22s ease,border-color .22s ease;
  white-space:nowrap;
}
.btn-primary{
  background:linear-gradient(135deg,var(--accent),#ff9a67);color:#1a0d06;font-weight:700;
  box-shadow:0 10px 26px -10px rgba(255,122,69,.85);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 30px -10px rgba(255,122,69,.95)}
.btn-primary:disabled{opacity:.5;cursor:not-allowed;transform:none}
.btn-ghost{background:var(--glass);border:1px solid var(--line);color:var(--text-1);backdrop-filter:blur(12px)}
.btn-ghost:hover{border-color:rgba(47,216,198,.5);color:var(--primary);transform:translateY(-2px)}
.btn-sm{padding:9px 16px;font-size:14px;border-radius:10px}

.mega{
  position:absolute;top:calc(100% + 14px);left:50%;
  transform:translate(-50%,8px);
  width:780px;display:grid;grid-template-columns:1fr 1fr 1.15fr;gap:22px;
  padding:24px;border-radius:var(--radius-l);
  background:rgba(12,20,36,.94);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border:1px solid var(--line);box-shadow:var(--shadow-card);
  opacity:0;visibility:hidden;pointer-events:none;
  transition:opacity .2s ease,transform .2s ease,visibility .2s ease;
  overflow:hidden;
}
.mega::before{
  content:"";position:absolute;top:0;left:0;right:0;height:3px;
  background:linear-gradient(90deg,var(--primary),var(--primary-2),transparent);
}
.nav-item.has-mega:hover .mega,
.nav-item.has-mega:focus-within .mega{opacity:1;visibility:visible;pointer-events:auto;transform:translate(-50%,0)}
.mega-col-title{font-size:13px;font-weight:600;color:var(--primary);margin-bottom:12px}
.mega-link{
  display:flex;align-items:center;gap:9px;padding:8px 10px;border-radius:10px;
  font-size:14px;color:var(--text-2);
}
.mega-link:hover{color:var(--text-1);background:rgba(47,216,198,.09);transform:translateX(2px)}
.mega-dot{width:6px;height:6px;border-radius:50%;background:var(--primary);box-shadow:0 0 8px rgba(47,216,198,.7);flex:0 0 auto}
.mega-post{display:block;padding:9px 10px;border-radius:10px;transition:.22s ease}
.mega-post:hover{background:rgba(47,216,198,.09)}
.mega-post b{display:block;font-size:14px;font-weight:500;color:var(--text-1);line-height:1.5}
.mega-post span{display:block;font-size:12px;color:var(--text-3);margin-top:3px}
.mega-card{
  display:flex;align-items:center;gap:12px;padding:12px;border-radius:var(--radius-m);
  border:1px solid var(--line);background:rgba(18,28,48,.7);transition:.22s ease;
}
.mega-card:hover{border-color:rgba(47,216,198,.45);transform:translateY(-3px);box-shadow:var(--shadow-glow)}
.mega-card img{width:64px;height:48px;object-fit:cover;border-radius:10px;flex:0 0 auto}
.mega-card b{display:block;font-size:14px;color:var(--text-1)}
.mega-card small{display:block;font-size:12px;color:var(--text-3);line-height:1.6}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:12px;border:1px solid var(--line);
  background:var(--glass);align-items:center;justify-content:center;color:var(--text-1);
}
.nav-toggle:hover{border-color:rgba(47,216,198,.45);color:var(--primary)}

/* 移动抽屉 */
.drawer-mask{
  position:fixed;inset:0;background:rgba(4,8,16,.66);backdrop-filter:blur(2px);
  opacity:0;visibility:hidden;transition:.24s ease;z-index:70;
}
.drawer-mask.is-open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(86vw,344px);z-index:80;
  background:var(--bg-1);border-left:1px solid var(--line);
  transform:translateX(100%);transition:transform .28s ease;
  padding:22px 20px 40px;overflow-y:auto;
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}
.drawer-title{font-size:13px;font-weight:600;color:var(--primary)}
.drawer-link{
  display:block;padding:13px 12px;border-radius:12px;font-size:15px;color:var(--text-1);
  border:1px solid transparent;
}
.drawer-link:hover{background:rgba(47,216,198,.08);border-color:var(--line)}
.drawer-link.is-active{color:var(--primary);background:rgba(47,216,198,.1);border-color:rgba(47,216,198,.3)}
.drawer-sep{height:1px;background:var(--line);margin:16px 0}

/* ---------- 页头 ---------- */
.page-head{
  position:relative;padding:130px 0 54px;overflow:hidden;
  background:
    radial-gradient(720px 340px at 10% 0%,rgba(47,216,198,.14),transparent 70%),
    linear-gradient(180deg,var(--bg-1),var(--bg-0));
  border-bottom:1px solid var(--line);
}
.page-head::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(120,200,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(120,200,255,.05) 1px,transparent 1px);
  background-size:56px 56px;
  -webkit-mask-image:radial-gradient(circle at 18% 8%,#000,transparent 68%);
  mask-image:radial-gradient(circle at 18% 8%,#000,transparent 68%);
}
.crumb{display:flex;align-items:center;gap:9px;font-size:13px;color:var(--text-3);flex-wrap:wrap}
.crumb a{color:var(--text-2)}
.crumb a:hover{color:var(--primary)}
.crumb .sep{color:var(--text-3)}
.crumb .current{color:var(--primary)}
.page-title{
  font-size:44px;line-height:1.25;font-weight:700;margin-top:18px;letter-spacing:0;
  max-width:820px;
}
.page-lead{font-size:16px;color:var(--text-2);line-height:1.85;max-width:780px;margin-top:16px}
.head-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.stat-strip{
  display:grid;grid-template-columns:repeat(4,1fr);gap:1px;
  margin-top:38px;border-radius:var(--radius-m);overflow:hidden;
  border:1px solid var(--line);background:var(--line);
}
.stat{
  background:rgba(12,20,36,.82);padding:20px 22px;
  border-top:1px solid rgba(47,216,198,.18);
}
.stat b{display:block;font-size:26px;font-weight:700;color:var(--primary);font-variant-numeric:tabular-nums;line-height:1.3}
.stat span{display:block;font-size:13px;color:var(--text-3);margin-top:4px}

/* ---------- 通用板块 ---------- */
.section{padding:76px 0}
.section-bg{background:var(--bg-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:760px;margin-bottom:36px}
.section-head h2{font-size:32px;line-height:1.3;font-weight:700}
.section-head p{color:var(--text-2);font-size:15px;margin-top:12px;line-height:1.85}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:600;
  color:var(--primary);padding:5px 12px;border-radius:999px;
  background:rgba(47,216,198,.09);border:1px solid rgba(47,216,198,.3);margin-bottom:14px;
}

/* ---------- 表格 ---------- */
.table-wrap{
  border:1px solid var(--line);border-radius:var(--radius-m);overflow:hidden;
  background:var(--glass);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  overflow-x:auto;
}
table.spec{width:100%;border-collapse:collapse;font-size:15px;min-width:640px}
.spec caption{
  caption-side:top;text-align:left;font-size:13px;color:var(--text-3);
  padding:16px 20px 0;
}
.spec thead th{
  background:rgba(18,28,48,.9);color:var(--text-1);font-size:14px;font-weight:600;
  text-align:left;padding:16px 18px;border-bottom:1px solid var(--line);white-space:nowrap;
}
.spec tbody td{
  padding:16px 18px;border-bottom:1px solid rgba(120,200,255,.08);
  color:var(--text-2);vertical-align:top;line-height:1.7;
}
.spec tbody tr:nth-child(even){background:rgba(18,28,48,.35)}
.spec tbody tr:hover{background:rgba(47,216,198,.06)}
.spec tbody td:first-child{color:var(--text-1);font-weight:600}
.spec tbody tr:last-child td{border-bottom:0}
.price{color:var(--accent-2);font-weight:600;font-variant-numeric:tabular-nums;white-space:nowrap}

/* ---------- 卡片 ---------- */
.spec-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.card{
  border-radius:var(--radius-m);border:1px solid var(--line);background:var(--glass);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  box-shadow:var(--shadow-card);padding:24px;
  transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.card:hover{transform:translateY(-4px);border-color:rgba(47,216,198,.3);box-shadow:0 18px 40px -18px rgba(0,0,0,.85),0 0 0 1px rgba(47,216,198,.22)}
.card-top{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px}
.badge{
  display:inline-flex;align-items:center;gap:6px;font-size:12px;padding:4px 11px;border-radius:999px;
  background:rgba(18,28,48,.75);border:1px solid rgba(47,216,198,.32);color:var(--primary);
  white-space:nowrap;
}
.badge.warm{border-color:rgba(255,122,69,.42);color:var(--accent)}
.metric{font-size:20px;font-weight:700;color:var(--accent-2);font-variant-numeric:tabular-nums;white-space:nowrap}
.metric i{font-style:normal;font-size:12px;font-weight:500;color:var(--text-3);margin-left:3px}
.card h3{font-size:22px;line-height:1.35;font-weight:600;margin-bottom:10px}
.card > p{font-size:14px;color:var(--text-2);line-height:1.8;margin-bottom:16px}
.dot-list{list-style:none;padding:0;display:grid;gap:11px;margin-bottom:20px}
.dot-list li{position:relative;padding-left:18px;font-size:14px;line-height:1.7;color:var(--text-2)}
.dot-list li::before{
  content:"";position:absolute;left:0;top:.7em;width:6px;height:6px;border-radius:50%;
  background:var(--primary);box-shadow:0 0 8px rgba(47,216,198,.6);
}
.link-arrow{
  display:inline-flex;align-items:center;gap:7px;font-size:14px;font-weight:600;color:var(--primary);
}
.link-arrow:hover{color:var(--primary-2);gap:11px}

/* ---------- 场景三栏 ---------- */
.scene-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.scene-card{
  border-radius:var(--radius-m);border:1px solid var(--line);background:var(--glass);
  overflow:hidden;transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.scene-card:hover{transform:translateY(-4px);border-color:rgba(47,216,198,.3);box-shadow:0 18px 40px -18px rgba(0,0,0,.85)}
.thumb{position:relative;aspect-ratio:4/3;overflow:hidden;background:linear-gradient(135deg,#0f1c31,#1a2a44)}
.thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease}
.scene-card:hover .thumb img{transform:scale(1.04)}
.thumb::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(7,12,24,.05),rgba(7,12,24,.72))}
.scene-body{padding:22px 22px 24px}
.scene-body h3{font-size:19px;font-weight:600;margin-bottom:12px;line-height:1.4}

/* ---------- FAQ ---------- */
.faq-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.faq-item{
  border-radius:var(--radius-m);border:1px solid var(--line);background:var(--glass);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);overflow:hidden;
  transition:border-color .22s ease,box-shadow .22s ease;
}
.faq-item[open]{border-color:rgba(47,216,198,.42);box-shadow:0 0 0 1px rgba(47,216,198,.2)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:flex-start;justify-content:space-between;gap:16px;
  padding:18px 20px;font-size:16px;font-weight:600;color:var(--text-1);line-height:1.6;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";color:var(--primary);font-size:20px;line-height:1;font-weight:500;flex:0 0 auto}
.faq-item[open] summary::after{content:"–"}
.faq-item p{padding:0 20px 20px;font-size:15px;color:var(--text-2);line-height:1.85}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;overflow:hidden;display:flex;align-items:center;justify-content:space-between;gap:32px;
  padding:40px 44px;border-radius:var(--radius-l);border:1px solid var(--line);
  background:linear-gradient(120deg,rgba(18,28,48,.94),rgba(12,20,36,.72));
  box-shadow:var(--shadow-card);
}
.cta-band::before{
  content:"";position:absolute;right:-70px;top:-90px;width:300px;height:300px;pointer-events:none;
  background:radial-gradient(circle,rgba(255,122,69,.24),transparent 70%);
}
.cta-band h2{font-size:28px;line-height:1.35;font-weight:700}
.cta-band p{font-size:15px;color:var(--text-2);margin-top:10px;max-width:560px}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;position:relative;z-index:2}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--bg-1);border-top:1px solid var(--line);margin-top:20px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.3fr;gap:40px;padding:66px 0 42px}
.footer-note{font-size:14px;color:var(--text-2);line-height:1.85;margin-top:16px;max-width:340px}
.footer-contact{font-size:13px;color:var(--text-3);line-height:1.9;margin-top:14px}
.footer-title{font-size:14px;font-weight:600;color:var(--primary);margin-bottom:16px}
.footer-link{display:block;font-size:14px;color:var(--text-2);padding:6px 0;transition:.2s ease}
.footer-link:hover{color:var(--primary);transform:translateX(2px)}
.subscribe{display:flex;gap:10px;margin-top:14px;flex-wrap:wrap}
.field{
  width:100%;background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius-s);
  padding:11px 14px;color:var(--text-1);font-size:14px;transition:.22s ease;
}
.field::placeholder{color:#5b6f85}
.field:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(47,216,198,.18)}
.subscribe .field{flex:1 1 150px;min-width:0}
.footer-bottom{
  display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;
  border-top:1px solid var(--line);padding:22px 0 30px;font-size:13px;color:var(--text-3);
}
.footer-bottom a{color:var(--text-3)}
.footer-bottom a:hover{color:var(--primary)}

.to-top{
  position:fixed;right:22px;bottom:22px;width:46px;height:46px;border-radius:50%;z-index:50;
  display:flex;align-items:center;justify-content:center;
  background:var(--glass);border:1px solid var(--line);backdrop-filter:blur(12px);color:var(--text-1);
  opacity:0;visibility:hidden;transform:translateY(10px);transition:.24s ease;
}
.to-top.is-show{opacity:1;visibility:visible;transform:none}
.to-top:hover{border-color:rgba(47,216,198,.55);color:var(--primary);box-shadow:var(--shadow-glow)}

.divider{height:1px;background:linear-gradient(90deg,transparent,var(--line),transparent)}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .nav-list{display:none}
  .nav-toggle{display:inline-flex;margin-left:auto}
  .nav-actions .hide-md{display:none}
  .spec-grid{grid-template-columns:repeat(2,1fr)}
  .scene-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .page-title{font-size:36px}
  .section{padding:64px 0}
  .section-head h2{font-size:28px}
}
@media (max-width:768px){
  .site-container{padding:0 16px}
  .page-head{padding:112px 0 42px}
  .page-title{font-size:30px}
  .page-lead{font-size:15px}
  .stat-strip{grid-template-columns:repeat(2,1fr)}
  .stat{padding:16px 16px}
  .stat b{font-size:22px}
  .section{padding:52px 0}
  .section-head h2{font-size:24px}
  .spec-grid{grid-template-columns:1fr}
  .scene-grid{grid-template-columns:1fr}
  .faq-grid{grid-template-columns:1fr}
  .cta-band{flex-direction:column;align-items:flex-start;padding:28px 22px}
  .cta-band h2{font-size:24px}
  .footer-grid{grid-template-columns:1fr;padding:48px 0 30px}

  .table-wrap{border:0;background:transparent;overflow:visible}
  table.spec{min-width:0}
  .spec caption{padding:0 0 14px}
  .spec thead{display:none}
  .spec tbody tr{
    display:block;background:var(--glass);border:1px solid var(--line);
    border-radius:var(--radius-m);margin-bottom:14px;overflow:hidden;
  }
  .spec tbody tr:nth-child(even){background:var(--glass)}
  .spec tbody td{
    display:flex;justify-content:space-between;align-items:flex-start;gap:16px;
    padding:11px 16px;border-bottom:1px dashed rgba(120,200,255,.12);
  }
  .spec tbody td::before{
    content:attr(data-label);color:var(--text-3);font-size:13px;font-weight:500;flex:0 0 auto;
  }
  .spec tbody td:last-child{border-bottom:0}
  .spec tbody td:first-child{padding-top:16px}
}
@media (max-width:520px){
  .page-title{font-size:27px}
  .head-actions .btn{width:100%}
  .card{padding:20px}
  .card h3{font-size:19px}
  .thumb{aspect-ratio:16/10}
}

/* roulang page: category3 */
:root{
  --bg-0:#070C18;
  --bg-1:#0C1424;
  --bg-2:#121C30;
  --line:rgba(120,200,255,0.14);
  --primary:#2FD8C6;
  --primary-2:#35B8FF;
  --accent:#FF7A45;
  --accent-2:#FFB020;
  --text-1:#E8F1FA;
  --text-2:#9FB3C8;
  --text-3:#64798F;
  --glow:rgba(47,216,198,0.45);
  --glass:rgba(18,28,48,0.55);
  --radius-s:10px;
  --radius-m:16px;
  --radius-l:24px;
  --shadow-card:0 12px 32px -12px rgba(0,0,0,.7);
  --shadow-glow:0 0 0 1px rgba(47,216,198,.35), 0 8px 28px -6px var(--glow);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--text-1);
  font-family:'PingFang SC','HarmonyOS Sans','Microsoft YaHei','Noto Sans SC',system-ui,sans-serif;
  font-size:16px;
  line-height:1.85;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button,input{font-family:inherit;font-size:inherit;}
h1,h2,h3,h4{line-height:1.25;margin:0;font-weight:700;letter-spacing:0;}
h1{font-size:44px;}
h2{font-size:32px;}
h3{font-size:22px;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
::selection{background:rgba(47,216,198,.3);color:#fff;}
::-webkit-scrollbar{width:10px;height:10px;}
::-webkit-scrollbar-track{background:var(--bg-1);}
::-webkit-scrollbar-thumb{background:rgba(120,200,255,.2);border-radius:999px;}
::-webkit-scrollbar-thumb:hover{background:rgba(47,216,198,.5);}
a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{
  outline:2px solid var(--primary);
  outline-offset:2px;
  border-radius:6px;
}
.site-container{max-width:1240px;margin:0 auto;padding:0 20px;width:100%;}
.section{padding:88px 0;}
.section-tight{padding:64px 0;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;flex-wrap:wrap;}
.section-head p{color:var(--text-2);max-width:720px;margin-top:12px;font-size:15px;line-height:1.8;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;color:var(--primary);letter-spacing:.14em;
  border:1px solid rgba(47,216,198,.35);
  background:rgba(47,216,198,.08);
  border-radius:999px;padding:5px 14px;margin-bottom:16px;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--primary);box-shadow:0 0 10px var(--glow);}
.hairline{height:1px;background:linear-gradient(90deg,transparent,var(--line),transparent);}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-weight:600;font-size:15px;line-height:1;
  padding:14px 26px;border-radius:var(--radius-s);
  border:1px solid transparent;cursor:pointer;
  transition:all 220ms ease-out;white-space:nowrap;
}
.btn-primary{background:var(--accent);color:#1A0C04;box-shadow:0 8px 24px -8px rgba(255,122,69,.7);}
.btn-primary:hover{background:#FF8E5F;transform:translateY(-2px);box-shadow:0 12px 30px -8px rgba(255,122,69,.85);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{background:var(--glass);color:var(--text-1);border-color:var(--line);backdrop-filter:blur(12px);}
.btn-ghost:hover{border-color:rgba(47,216,198,.5);color:var(--primary);transform:translateY(-2px);}
.btn-sm{padding:10px 18px;font-size:14px;}
.btn:disabled{opacity:.5;cursor:not-allowed;transform:none;}

/* ===== 徽章 / 胶囊 ===== */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;line-height:1;padding:6px 12px;border-radius:999px;
  background:rgba(18,28,48,.75);border:1px solid var(--line);color:var(--text-2);
}
.badge-primary{border-color:rgba(47,216,198,.4);color:var(--primary);background:rgba(47,216,198,.08);}
.badge-accent{border-color:rgba(255,122,69,.4);color:var(--accent);background:rgba(255,122,69,.08);}
.badge-gold{border-color:rgba(255,176,32,.4);color:var(--accent-2);background:rgba(255,176,32,.08);}

/* ===== 卡片 ===== */
.card{
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--radius-m);
  backdrop-filter:blur(12px);
  box-shadow:var(--shadow-card);
  transition:transform 220ms ease-out,border-color 220ms ease-out,box-shadow 220ms ease-out;
  overflow:hidden;
}
.card:hover{transform:translateY(-4px);border-color:rgba(47,216,198,.3);box-shadow:0 0 0 1px rgba(47,216,198,.18),0 16px 40px -14px rgba(0,0,0,.85);}

/* ===== 顶部导航 ===== */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(7,12,24,.62);
  backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:background 260ms ease-out,border-color 260ms ease-out;
}
.site-header.is-stuck{background:rgba(7,12,24,.9);border-bottom-color:var(--line);}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:20px;height:74px;}
.brand{display:inline-flex;align-items:center;gap:10px;font-size:17px;font-weight:700;color:var(--text-1);}
.brand-mark{
  width:26px;height:26px;border-radius:8px;
  background:linear-gradient(135deg,rgba(47,216,198,.28),rgba(53,184,255,.18));
  border:1px solid rgba(47,216,198,.7);
  position:relative;flex:0 0 auto;
  clip-path:polygon(0 0,100% 0,100% 72%,72% 100%,0 100%);
}
.brand-mark::after{content:"";position:absolute;inset:7px;border-radius:3px;background:var(--primary);opacity:.85;}
.nav-list{display:flex;align-items:center;gap:4px;}
.nav-item{position:relative;}
.nav-link{
  display:inline-flex;align-items:center;gap:6px;
  padding:10px 14px;border-radius:var(--radius-s);
  color:var(--text-2);font-size:15px;font-weight:500;
  transition:color 200ms ease-out,background 200ms ease-out;
  position:relative;
}
.nav-link:hover{color:var(--text-1);background:rgba(120,200,255,.07);}
.nav-link.is-active{color:var(--primary);}
.nav-link.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;
  background:var(--primary);border-radius:2px;box-shadow:0 0 8px var(--glow);
}
.nav-actions{display:flex;align-items:center;gap:10px;}
.icon-btn{
  width:40px;height:40px;display:inline-flex;align-items:center;justify-content:center;
  border-radius:var(--radius-s);border:1px solid var(--line);
  background:var(--glass);color:var(--text-2);cursor:pointer;
  transition:all 200ms ease-out;
}
.icon-btn:hover{color:var(--primary);border-color:rgba(47,216,198,.45);}
.nav-toggle{display:none;}

/* Mega 面板 */
.mega{
  position:absolute;top:calc(100% + 10px);left:50%;
  transform:translateX(-50%) translateY(8px);
  width:840px;max-width:calc(100vw - 40px);
  display:grid;grid-template-columns:1fr 1fr 1.15fr;gap:28px;
  padding:26px 26px 24px;
  background:rgba(12,20,36,.94);
  border:1px solid var(--line);
  border-radius:var(--radius-l);
  box-shadow:0 30px 70px -24px rgba(0,0,0,.9);
  backdrop-filter:blur(18px);
  opacity:0;visibility:hidden;pointer-events:none;
  transition:opacity 200ms ease-out,transform 200ms ease-out,visibility 200ms;
}
.mega::before{
  content:"";position:absolute;left:24px;right:24px;top:0;height:3px;border-radius:3px;
  background:linear-gradient(90deg,var(--primary),var(--primary-2) 55%,transparent);
}
.has-mega:hover .mega,
.has-mega:focus-within .mega{opacity:1;visibility:visible;pointer-events:auto;transform:translateX(-50%) translateY(0);}
.mega-col-title{font-size:12px;color:var(--primary);letter-spacing:.12em;margin-bottom:14px;font-weight:600;}
.mega-link{
  display:flex;align-items:center;gap:9px;
  padding:9px 10px;border-radius:var(--radius-s);
  color:var(--text-2);font-size:14px;
  transition:all 180ms ease-out;
}
.mega-link:hover{color:var(--text-1);background:rgba(120,200,255,.08);transform:translateX(2px);}
.mega-dot{width:5px;height:5px;border-radius:50%;background:var(--primary);flex:0 0 auto;opacity:.8;}
.mega-post{display:block;padding:10px;border-radius:var(--radius-s);transition:background 180ms ease-out;}
.mega-post:hover{background:rgba(120,200,255,.08);}
.mega-post b{display:block;font-size:14px;font-weight:500;color:var(--text-1);line-height:1.55;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.mega-post span{display:block;font-size:12px;color:var(--text-3);margin-top:4px;}
.mega-card{
  display:block;border-radius:var(--radius-m);overflow:hidden;
  border:1px solid var(--line);background:var(--bg-2);
  transition:border-color 200ms ease-out,transform 200ms ease-out;
}
.mega-card:hover{border-color:rgba(47,216,198,.4);transform:translateY(-2px);}
.mega-card img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.mega-card-body{padding:12px 14px 14px;}
.mega-card-body b{display:block;font-size:14px;color:var(--text-1);}
.mega-card-body span{display:block;font-size:12.5px;color:var(--text-2);line-height:1.7;margin-top:5px;}
.mega-card-more{display:inline-flex;align-items:center;gap:6px;font-size:12.5px;color:var(--primary);margin-top:10px;}

/* ===== 面包屑 ===== */
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-3);flex-wrap:wrap;}
.breadcrumb a{color:var(--text-2);transition:color 180ms ease-out;}
.breadcrumb a:hover{color:var(--primary);}
.breadcrumb .sep{color:var(--text-3);opacity:.6;}
.breadcrumb .current{color:var(--primary);}

/* ===== 页头 Hero ===== */
.page-hero{
  position:relative;overflow:hidden;
  padding:56px 0 64px;
  border-bottom:1px solid var(--line);
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(760px 340px at 12% -10%,rgba(47,216,198,.16),transparent 68%),
    radial-gradient(560px 280px at 92% 8%,rgba(53,184,255,.12),transparent 70%),
    url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  opacity:.85;
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(7,12,24,.72),rgba(7,12,24,.92) 62%,var(--bg-0));
}
.page-hero .site-container{position:relative;z-index:2;}
.hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:52px;align-items:center;margin-top:26px;}
.hero-copy h1{max-width:640px;}
.hero-copy h1 em{font-style:normal;color:var(--primary);}
.hero-sub{color:var(--text-2);font-size:16px;line-height:1.9;margin-top:18px;max-width:600px;}
.hero-actions{display:flex;gap:14px;margin-top:28px;flex-wrap:wrap;}
.hero-media{position:relative;border-radius:var(--radius-l);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow-card);}
.hero-media img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.hero-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(7,12,24,.05),rgba(7,12,24,.55));}
.hero-float{
  position:absolute;left:20px;right:20px;bottom:20px;z-index:3;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:16px 18px;border-radius:var(--radius-m);
  background:rgba(12,20,36,.82);border:1px solid var(--line);
  backdrop-filter:blur(14px);
}
.hero-float strong{display:block;font-size:15px;color:var(--text-1);}
.hero-float span{display:block;font-size:12.5px;color:var(--text-3);margin-top:3px;}
.hero-float .num{font-size:22px;font-weight:700;color:var(--accent-2);line-height:1;}

/* ===== 步骤条 ===== */
.steps-band{position:relative;}
.steps-track{
  display:grid;grid-template-columns:repeat(5,1fr);gap:0;
  border:1px solid var(--line);border-radius:var(--radius-l);
  background:linear-gradient(180deg,rgba(18,28,48,.72),rgba(12,20,36,.5));
  overflow:hidden;
}
.step-cell{
  position:relative;padding:26px 22px 26px;
  border-right:1px solid var(--line);
  transition:background 220ms ease-out;
}
.step-cell:last-child{border-right:none;}
.step-cell:hover{background:rgba(47,216,198,.06);}
.step-cell::after{
  content:"";position:absolute;left:0;right:0;top:0;height:2px;
  background:linear-gradient(90deg,var(--primary),rgba(53,184,255,.4));
  opacity:0;transition:opacity 220ms ease-out;
}
.step-cell:hover::after,.step-cell.is-current::after{opacity:1;}
.step-no{
  display:inline-flex;align-items:center;justify-content:center;
  width:32px;height:32px;border-radius:50%;
  border:1px solid rgba(47,216,198,.45);
  background:rgba(47,216,198,.1);
  color:var(--primary);font-size:13px;font-weight:700;
  margin-bottom:14px;
}
.step-cell h3{font-size:16px;color:var(--text-1);}
.step-cell p{font-size:13px;color:var(--text-2);margin-top:8px;line-height:1.75;}
.step-cell .step-time{display:block;font-size:12px;color:var(--text-3);margin-top:10px;}

/* ===== 时间轴 ===== */
.timeline{position:relative;padding:8px 0;}
.timeline::before{
  content:"";position:absolute;left:50%;top:20px;bottom:20px;width:2px;transform:translateX(-50%);
  background:linear-gradient(180deg,rgba(47,216,198,.75),rgba(53,184,255,.28) 55%,transparent);
  border-radius:2px;
}
.tl-item{
  position:relative;display:grid;grid-template-columns:1fr 1fr;gap:48px;
  align-items:center;padding:30px 0;
}
.tl-dot{
  position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);
  width:44px;height:44px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:var(--bg-1);border:1px solid rgba(47,216,198,.55);
  color:var(--primary);font-size:13px;font-weight:700;
  box-shadow:0 0 0 6px rgba(7,12,24,.9),0 0 22px -4px var(--glow);
  z-index:3;
}
.tl-card{
  background:var(--glass);border:1px solid var(--line);border-radius:var(--radius-m);
  padding:26px 26px 24px;backdrop-filter:blur(12px);box-shadow:var(--shadow-card);
  transition:transform 220ms ease-out,border-color 220ms ease-out;
}
.tl-card:hover{transform:translateY(-4px);border-color:rgba(47,216,198,.3);}
.tl-card h3{margin-top:14px;font-size:20px;}
.tl-card > p{color:var(--text-2);font-size:14.5px;margin-top:10px;line-height:1.85;}
.tl-list{margin-top:14px;display:grid;gap:8px;}
.tl-list li{position:relative;padding-left:16px;font-size:13.5px;color:var(--text-2);line-height:1.7;}
.tl-list li::before{content:"";position:absolute;left:0;top:9px;width:5px;height:5px;border-radius:50%;background:var(--primary);}
.tl-media{border-radius:var(--radius-m);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow-card);}
.tl-media img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform 400ms ease-out;}
.tl-media:hover img{transform:scale(1.03);}
.tl-item:nth-child(even) .tl-card{order:2;grid-column:2;}
.tl-item:nth-child(even) .tl-media{order:1;grid-column:1;grid-row:1;}
.tl-item:nth-child(odd) .tl-card{grid-column:1;}
.tl-item:nth-child(odd) .tl-media{grid-column:2;}
.tl-item:nth-child(odd) .tl-card{text-align:right;}
.tl-item:nth-child(odd) .tl-list li{padding-left:0;padding-right:16px;}
.tl-item:nth-child(odd) .tl-list li::before{left:auto;right:0;}

/* ===== 数据条 ===== */
.metrics{
  display:grid;grid-template-columns:repeat(4,1fr);gap:1px;
  background:var(--line);border:1px solid var(--line);border-radius:var(--radius-l);overflow:hidden;
}
.metric{background:linear-gradient(180deg,rgba(18,28,48,.78),rgba(12,20,36,.55));padding:32px 24px;text-align:center;}
.metric .val{font-size:38px;font-weight:700;color:var(--accent-2);line-height:1;letter-spacing:-.01em;}
.metric .val small{font-size:16px;color:var(--text-2);font-weight:500;margin-left:3px;}
.metric .lbl{display:block;margin-top:12px;font-size:14px;color:var(--text-2);}
.metric .hint{display:block;margin-top:6px;font-size:12px;color:var(--text-3);}

/* ===== 案例卡 ===== */
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.case-card{display:flex;flex-direction:column;}
.case-card .thumb{overflow:hidden;}
.case-card .thumb img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform 400ms ease-out;}
.case-card:hover .thumb img{transform:scale(1.04);}
.case-body{padding:22px 22px 24px;display:flex;flex-direction:column;flex:1;}
.case-body h3{font-size:18px;margin-top:12px;}
.case-body p{font-size:14px;color:var(--text-2);margin-top:10px;line-height:1.8;}
.case-facts{margin-top:16px;display:flex;gap:18px;flex-wrap:wrap;padding-top:16px;border-top:1px solid var(--line);}
.case-facts div strong{display:block;font-size:17px;color:var(--primary);font-weight:700;line-height:1.2;}
.case-facts div span{display:block;font-size:12px;color:var(--text-3);margin-top:4px;}

/* ===== 资讯列表 ===== */
.news-list{display:grid;gap:14px;}
.news-item{
  display:grid;grid-template-columns:96px 1fr auto;gap:22px;align-items:center;
  padding:20px 24px;border-radius:var(--radius-m);
  background:var(--glass);border:1px solid var(--line);backdrop-filter:blur(12px);
  transition:transform 220ms ease-out,border-color 220ms ease-out;
}
.news-item:hover{transform:translateY(-3px);border-color:rgba(47,216,198,.32);}
.news-date{
  border-right:1px solid var(--line);padding-right:20px;text-align:center;
}
.news-date b{display:block;font-size:24px;font-weight:700;color:var(--text-1);line-height:1;}
.news-date span{display:block;font-size:12px;color:var(--text-3);margin-top:6px;}
.news-main h3{font-size:17px;color:var(--text-1);}
.news-main p{font-size:13.5px;color:var(--text-2);margin-top:8px;line-height:1.75;overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;}
.news-tags{display:flex;gap:8px;margin-bottom:8px;flex-wrap:wrap;}
.news-arrow{
  width:40px;height:40px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  border:1px solid var(--line);background:rgba(18,28,48,.7);color:var(--text-2);
  transition:all 220ms ease-out;
}
.news-item:hover .news-arrow{color:var(--primary);border-color:rgba(47,216,198,.5);box-shadow:0 0 18px -6px var(--glow);}

/* ===== FAQ ===== */
.faq-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;}
.faq-item{
  border:1px solid var(--line);border-radius:var(--radius-m);
  background:var(--glass);backdrop-filter:blur(12px);
  overflow:hidden;transition:border-color 220ms ease-out;
}
.faq-item[open]{border-color:rgba(47,216,198,.34);}
.faq-item summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:flex-start;justify-content:space-between;gap:16px;
  padding:20px 22px;font-size:15.5px;font-weight:600;color:var(--text-1);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"+";flex:0 0 auto;color:var(--primary);font-size:20px;line-height:1;font-weight:600;
  transition:transform 220ms ease-out;
}
.faq-item[open] summary::after{transform:rotate(45deg);}
.faq-body{padding:0 22px 22px;color:var(--text-2);font-size:14px;line-height:1.9;}

/* ===== CTA ===== */
.cta-band{
  position:relative;overflow:hidden;
  border:1px solid rgba(47,216,198,.28);
  border-radius:var(--radius-l);
  background:linear-gradient(120deg,rgba(18,28,48,.92),rgba(12,20,36,.78));
  padding:42px 44px;
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
}
.cta-band::before{
  content:"";position:absolute;left:-80px;top:-120px;width:360px;height:360px;border-radius:50%;
  background:radial-gradient(circle,rgba(47,216,198,.22),transparent 68%);
}
.cta-band > *{position:relative;z-index:2;}
.cta-band h2{font-size:26px;}
.cta-band p{color:var(--text-2);font-size:14.5px;margin-top:10px;max-width:620px;}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;}

/* ===== 表单 ===== */
.field{
  width:100%;padding:13px 16px;border-radius:var(--radius-s);
  background:var(--bg-2);border:1px solid var(--line);color:var(--text-1);
  font-size:14px;transition:border-color 200ms ease-out,box-shadow 200ms ease-out;
}
.field::placeholder{color:var(--text-3);}
.field:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(47,216,198,.2);}

/* ===== 页脚 ===== */
.site-footer{background:var(--bg-1);border-top:1px solid var(--line);padding:64px 0 0;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:40px;padding-bottom:44px;}
.footer-title{font-size:14px;color:var(--primary);font-weight:600;margin-bottom:16px;}
.footer-note{font-size:13.5px;color:var(--text-2);line-height:1.9;margin-top:16px;max-width:360px;}
.footer-contact{font-size:13px;color:var(--text-3);line-height:2;margin-top:14px;}
.footer-link{
  display:block;font-size:14px;color:var(--text-2);line-height:2.2;
  transition:color 180ms ease-out,transform 180ms ease-out;
}
.footer-link:hover{color:var(--primary);transform:translateX(2px);}
.subscribe{display:flex;gap:10px;margin-top:14px;}
.subscribe .field{flex:1;min-width:0;}
.footer-bottom{
  border-top:1px solid var(--line);padding:22px 0 28px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--text-3);
}
.footer-bottom a{color:var(--text-3);transition:color 180ms ease-out;}
.footer-bottom a:hover{color:var(--primary);}

/* ===== 返回顶部 ===== */
.to-top{
  position:fixed;right:24px;bottom:24px;z-index:90;
  width:46px;height:46px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:rgba(18,28,48,.85);border:1px solid var(--line);
  color:var(--text-2);cursor:pointer;backdrop-filter:blur(10px);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:all 240ms ease-out;
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{color:var(--primary);border-color:rgba(47,216,198,.5);box-shadow:0 0 22px -6px var(--glow);}

/* ===== 图片降级 ===== */
.img-fallback{
  width:100%;aspect-ratio:16/10;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,rgba(18,28,48,.95),rgba(12,20,36,.85));
  color:var(--primary);font-size:30px;font-weight:700;letter-spacing:.06em;
}

/* ===== 响应式 ===== */
@media (max-width:1200px){
  .nav-link{padding:10px 10px;font-size:14.5px;}
  .mega{width:720px;}
}
@media (max-width:1024px){
  h1{font-size:32px;}
  h2{font-size:26px;}
  .section{padding:64px 0;}
  .hero-grid{grid-template-columns:1fr;gap:32px;}
  .nav-list{
    position:fixed;top:0;right:0;height:100vh;width:min(88vw,360px);
    flex-direction:column;align-items:stretch;gap:4px;
    background:rgba(12,20,36,.98);border-left:1px solid var(--line);
    padding:88px 20px 32px;overflow-y:auto;
    transform:translateX(102%);transition:transform 280ms ease-out;
    z-index:95;
  }
  .nav-list.open{transform:translateX(0);}
  .nav-link{width:100%;justify-content:space-between;padding:14px 12px;font-size:15px;}
  .nav-link.is-active::after{display:none;}
  .nav-link.is-active{background:rgba(47,216,198,.1);border-left:2px solid var(--primary);border-radius:0 var(--radius-s) var(--radius-s) 0;}
  .has-mega .mega{
    position:static;transform:none;width:100%;opacity:1;visibility:visible;pointer-events:auto;
    grid-template-columns:1fr;gap:16px;margin:6px 0 10px;box-shadow:none;
    background:rgba(7,12,24,.6);
  }
  .has-mega .mega::before{display:none;}
  .nav-toggle{display:inline-flex;}
  .nav-backdrop{
    position:fixed;inset:0;background:rgba(4,8,16,.65);backdrop-filter:blur(3px);
    opacity:0;visibility:hidden;transition:all 240ms ease-out;z-index:94;
  }
  .nav-backdrop.show{opacity:1;visibility:visible;}
  .steps-track{grid-template-columns:1fr 1fr;}
  .step-cell{border-bottom:1px solid var(--line);}
  .step-cell:nth-child(2n){border-right:none;}
  .metrics{grid-template-columns:1fr 1fr;}
  .case-grid{grid-template-columns:1fr 1fr;}
  .faq-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:768px){
  body{font-size:15px;}
  h1{font-size:30px;}
  h2{font-size:24px;}
  h3{font-size:19px;}
  .section{padding:52px 0;}
  .site-container{padding:0 16px;}
  .page-hero{padding:36px 0 46px;}
  .timeline::before{left:16px;transform:none;}
  .tl-item{grid-template-columns:1fr;gap:20px;padding:22px 0 22px 44px;}
  .tl-item:nth-child(odd) .tl-card,
  .tl-item:nth-child(even) .tl-card{grid-column:1;order:2;text-align:left;}
  .tl-item:nth-child(odd) .tl-media,
  .tl-item:nth-child(even) .tl-media{grid-column:1;grid-row:auto;order:1;}
  .tl-item:nth-child(odd) .tl-list li{padding-left:16px;padding-right:0;}
  .tl-item:nth-child(odd) .tl-list li::before{left:0;right:auto;}
  .tl-dot{left:16px;top:32px;transform:translate(-50%,0);width:34px;height:34px;font-size:12px;}
  .steps-track{grid-template-columns:1fr;}
  .step-cell{border-right:none;}
  .metrics{grid-template-columns:1fr 1fr;}
  .case-grid{grid-template-columns:1fr;}
  .news-item{grid-template-columns:1fr;gap:14px;}
  .news-date{border-right:none;border-bottom:1px solid var(--line);padding:0 0 12px;text-align:left;display:flex;align-items:baseline;gap:10px;}
  .news-date b{font-size:20px;}
  .news-date span{margin-top:0;}
  .news-arrow{display:none;}
  .cta-band{padding:30px 24px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{flex:1;justify-content:center;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:520px){
  h1{font-size:26px;}
  .hero-float{position:static;margin-top:14px;border-radius:var(--radius-m);}
  .hero-media::after{display:none;}
  .metrics{grid-template-columns:1fr;}
  .btn{width:100%;}
  .hero-actions .btn,.cta-actions .btn{width:100%;}
  .subscribe{flex-direction:column;}
}

/* roulang page: category4 */
:root{
  --bg-0:#070C18;--bg-1:#0C1424;--bg-2:#121C30;
  --line:rgba(120,200,255,0.14);
  --primary:#2FD8C6;--primary-2:#35B8FF;--accent:#FF7A45;--accent-2:#FFB020;
  --text-1:#E8F1FA;--text-2:#9FB3C8;--text-3:#64798F;
  --glow:rgba(47,216,198,0.45);
  --glass:rgba(18,28,48,0.55);
  --radius-s:10px;--radius-m:16px;--radius-l:24px;
  --shadow-card:0 12px 32px -12px rgba(0,0,0,.7);
  --shadow-glow:0 0 0 1px rgba(47,216,198,.35), 0 8px 28px -6px var(--glow);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;background:var(--bg-0);color:var(--text-1);
  font-family:'PingFang SC','HarmonyOS Sans','Microsoft YaHei','Noto Sans SC',Inter,system-ui,sans-serif;
  font-size:16px;line-height:1.85;-webkit-font-smoothing:antialiased;
  background-image:radial-gradient(760px 420px at 12% -6%, rgba(47,216,198,.10), transparent 62%),
                   radial-gradient(680px 380px at 92% 4%, rgba(53,184,255,.08), transparent 60%);
  background-repeat:no-repeat;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
h1,h2,h3,h4{margin:0;line-height:1.25;font-weight:700;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
::selection{background:rgba(47,216,198,.3);}

/* 滚动条 */
::-webkit-scrollbar{width:10px;height:10px;}
::-webkit-scrollbar-track{background:var(--bg-0);}
::-webkit-scrollbar-thumb{background:#1B2A42;border-radius:999px;border:2px solid var(--bg-0);}
::-webkit-scrollbar-thumb:hover{background:#254063;}

.site-container{width:100%;max-width:1240px;margin:0 auto;padding:0 20px;}
.section{padding:88px 0;}
.section-tight{padding:64px 0;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px;flex-wrap:wrap;}
.section-title{font-size:32px;}
.section-desc{color:var(--text-2);font-size:15px;line-height:1.8;max-width:640px;margin-top:10px;}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:600;color:var(--primary);background:rgba(47,216,198,.08);border:1px solid rgba(47,216,198,.25);border-radius:999px;padding:5px 12px;margin-bottom:16px;}
.divider{height:1px;background:linear-gradient(90deg,transparent,var(--line) 20%,var(--line) 80%,transparent);}
.text-muted{color:var(--text-2);}
.text-dim{color:var(--text-3);}

/* 按钮 */
.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-s);border:1px solid transparent;cursor:pointer;transition:all .22s ease-out;white-space:nowrap;background:none;color:var(--text-1);}
.btn:focus-visible{outline:2px solid var(--primary);outline-offset:3px;}
.btn-primary{background:linear-gradient(135deg,#FF8A55,#FF6A2E);color:#241006;box-shadow:0 12px 28px -12px rgba(255,122,69,.9),0 0 0 1px rgba(255,122,69,.35);}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 34px -12px rgba(255,122,69,1),0 0 0 1px rgba(255,122,69,.5);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{background:var(--glass);border-color:var(--line);color:var(--text-1);backdrop-filter:blur(10px);}
.btn-ghost:hover{border-color:rgba(47,216,198,.45);color:var(--primary);transform:translateY(-2px);}
.btn-sm{padding:9px 16px;font-size:14px;}
.btn-block{width:100%;}
.btn[disabled],.btn.is-disabled{opacity:.5;cursor:not-allowed;transform:none !important;}

/* 顶部导航 */
.site-header{position:sticky;top:0;z-index:60;background:rgba(7,12,24,.72);backdrop-filter:blur(14px);border-bottom:1px solid var(--line);transition:background .25s ease,box-shadow .25s ease;}
.site-header.is-scrolled{background:rgba(7,12,24,.92);box-shadow:0 14px 34px -24px #000;}
.nav-wrap{display:flex;align-items:center;gap:18px;height:70px;}
.brand{display:inline-flex;align-items:center;gap:10px;font-size:17px;font-weight:700;color:var(--text-1);letter-spacing:0;}
.brand-mark{position:relative;width:26px;height:26px;border:2px solid var(--primary);border-radius:10px 4px 10px 4px;box-shadow:0 0 14px -3px var(--glow);flex:0 0 auto;}
.brand-mark::after{content:'';position:absolute;inset:6px;border-radius:3px;background:var(--primary);opacity:.85;}
.nav-list{display:flex;align-items:center;gap:2px;margin-left:6px;}
.nav-item{position:relative;}
.nav-link{position:relative;display:inline-flex;align-items:center;gap:6px;padding:10px 13px;font-size:15px;font-weight:500;color:var(--text-2);border-radius:var(--radius-s);transition:color .2s,background .2s;}
.nav-link:hover{color:var(--text-1);background:rgba(47,216,198,.08);}
.nav-link.is-active{color:var(--text-1);}
.nav-link.is-active::after{content:'';position:absolute;left:13px;right:13px;bottom:1px;height:2px;border-radius:2px;background:linear-gradient(90deg,var(--primary),var(--primary-2));box-shadow:0 0 10px var(--glow);}
.nav-link:focus-visible{outline:2px solid var(--primary);outline-offset:2px;}
.nav-actions{margin-left:auto;display:flex;align-items:center;gap:10px;}
.icon-btn{width:38px;height:38px;border-radius:50%;display:grid;place-items:center;border:1px solid var(--line);background:rgba(18,28,48,.6);color:var(--text-2);cursor:pointer;transition:all .2s ease;}
.icon-btn:hover{color:var(--primary);border-color:rgba(47,216,198,.4);}
.icon-btn:focus-visible{outline:2px solid var(--primary);outline-offset:2px;}
.nav-toggle{display:none;}

/* Mega 面板 */
.mega{position:absolute;top:calc(100% + 14px);left:-40px;width:780px;display:grid;grid-template-columns:1fr 1.15fr 1.25fr;gap:22px;padding:22px;background:var(--glass);backdrop-filter:blur(18px);border:1px solid var(--line);border-radius:var(--radius-l);box-shadow:var(--shadow-card);opacity:0;visibility:hidden;transform:translateY(8px);transition:opacity .2s ease-out,transform .2s ease-out,visibility .2s;pointer-events:none;z-index:70;}
.mega::before{content:'';position:absolute;left:18px;right:18px;top:0;height:3px;border-radius:0 0 3px 3px;background:linear-gradient(90deg,var(--primary),var(--primary-2),transparent);}
.has-mega:hover .mega,.has-mega:focus-within .mega{opacity:1;visibility:visible;transform:translateY(0);pointer-events:auto;}
.mega-col-title{font-size:12px;font-weight:600;color:var(--primary);margin-bottom:10px;}
.mega-link{display:flex;align-items:center;gap:9px;padding:8px 10px;border-radius:var(--radius-s);font-size:14px;color:var(--text-2);transition:all .2s ease;}
.mega-link:hover{background:rgba(47,216,198,.1);color:var(--text-1);transform:translateX(2px);}
.mega-dot{width:6px;height:6px;border-radius:50%;background:var(--primary);box-shadow:0 0 8px var(--glow);flex:0 0 auto;}
.mega-post{display:block;padding:8px 10px;border-radius:var(--radius-s);transition:background .2s ease;}
.mega-post b{display:block;font-size:14px;font-weight:500;color:var(--text-1);line-height:1.5;}
.mega-post span{font-size:12px;color:var(--text-3);}
.mega-post:hover{background:rgba(47,216,198,.09);}
.mega-card{display:block;border:1px solid var(--line);border-radius:var(--radius-m);overflow:hidden;background:var(--bg-2);transition:all .22s ease-out;}
.mega-card img{width:100%;height:92px;object-fit:cover;}
.mega-card-inner{padding:10px 12px;}
.mega-card b{display:block;font-size:14px;color:var(--text-1);}
.mega-card span{font-size:12px;color:var(--text-2);}
.mega-card:hover{transform:translateY(-4px);border-color:rgba(47,216,198,.32);}

/* 移动抽屉 */
.drawer-mask{position:fixed;inset:0;background:rgba(4,8,16,.62);backdrop-filter:blur(2px);opacity:0;visibility:hidden;transition:opacity .25s ease,visibility .25s;z-index:70;}
.drawer{position:fixed;top:0;right:0;height:100%;width:min(88vw,360px);background:var(--bg-1);border-left:1px solid var(--line);transform:translateX(100%);transition:transform .28s ease-out;z-index:80;overflow-y:auto;padding:20px;}
body.nav-open .drawer{transform:translateX(0);}
body.nav-open .drawer-mask{opacity:1;visibility:visible;}
.drawer-group-title{font-size:12px;font-weight:600;color:var(--primary);margin:22px 0 10px;}
.drawer-link{display:block;padding:12px 14px;border-radius:var(--radius-s);font-size:15px;color:var(--text-2);border:1px solid transparent;transition:all .2s ease;}
.drawer-link:hover,.drawer-link.is-active{color:var(--text-1);background:rgba(47,216,198,.1);border-color:rgba(47,216,198,.25);}

/* 页面头图 */
.page-hero{position:relative;overflow:hidden;padding:104px 0 76px;text-align:center;background-image:linear-gradient(180deg,rgba(7,12,24,.78),rgba(7,12,24,.94)),url('/assets/images/backpic/back-1.webp');background-size:cover;background-position:center;border-bottom:1px solid var(--line);}
.page-hero::after{content:'';position:absolute;inset:0;background-image:linear-gradient(rgba(120,200,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(120,200,255,.05) 1px,transparent 1px);background-size:56px 56px;mask-image:radial-gradient(600px 320px at 50% 20%,#000,transparent 75%);pointer-events:none;}
.page-hero .site-container{position:relative;z-index:2;}
.breadcrumb{display:flex;align-items:center;justify-content:center;gap:8px;font-size:13px;color:var(--text-3);margin-bottom:20px;flex-wrap:wrap;}
.breadcrumb a{color:var(--text-2);transition:color .2s ease;}
.breadcrumb a:hover{color:var(--primary);}
.breadcrumb .sep{color:var(--text-3);}
.breadcrumb .current{color:var(--primary);}
.page-hero h1{font-size:44px;max-width:900px;margin:0 auto;}
.page-hero .hero-sub{margin:18px auto 0;max-width:720px;font-size:16px;color:var(--text-2);line-height:1.85;}
.hero-chips{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-top:28px;}
.chip{display:inline-flex;align-items:center;gap:7px;font-size:13px;color:var(--text-2);background:var(--glass);border:1px solid var(--line);border-radius:999px;padding:8px 14px;backdrop-filter:blur(10px);transition:all .2s ease;}
.chip:hover{color:var(--primary);border-color:rgba(47,216,198,.4);transform:translateY(-2px);}

/* 数据条 */
.stat-band{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:rgba(12,20,36,.6);}
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);}
.stat-cell{padding:26px 20px;border-right:1px solid var(--line);}
.stat-cell:last-child{border-right:none;}
.stat-num{font-size:28px;font-weight:700;color:var(--accent-2);line-height:1.2;}
.stat-label{margin-top:6px;font-size:14px;color:var(--text-2);}
.stat-note{font-size:13px;color:var(--text-3);margin-top:4px;}

/* 两栏长文 */
.split{display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:44px;align-items:start;}
.prose{max-width:820px;}
.prose h2{font-size:32px;position:relative;padding-left:16px;margin-bottom:18px;}
.prose h2::before{content:'';position:absolute;left:0;top:8px;bottom:8px;width:3px;border-radius:3px;background:linear-gradient(180deg,var(--primary),var(--primary-2));}
.prose h3{font-size:22px;margin:30px 0 12px;}
.prose p{color:var(--text-2);margin-bottom:1.2em;line-height:1.9;}
.prose p strong{color:var(--text-1);font-weight:600;}
.bullet-list{margin:6px 0 1.4em;}
.bullet-list li{position:relative;padding-left:20px;color:var(--text-2);line-height:1.75;margin-bottom:11px;}
.bullet-list li::before{content:'';position:absolute;left:2px;top:10px;width:7px;height:7px;border-radius:50%;background:var(--primary);box-shadow:0 0 8px -1px var(--glow);}
.bullet-list li b{color:var(--text-1);font-weight:600;}
.pull-quote{margin:26px 0;padding:18px 20px;background:var(--glass);border-left:3px solid var(--primary);border-radius:0 var(--radius-m) var(--radius-m) 0;color:var(--text-2);font-size:15px;line-height:1.85;backdrop-filter:blur(10px);}

/* 粘性信息卡 */
.side-stack{display:grid;gap:18px;}
.sticky-card{position:sticky;top:96px;display:grid;gap:18px;}
.side-card{background:var(--glass);border:1px solid var(--line);border-radius:var(--radius-m);padding:22px;backdrop-filter:blur(12px);box-shadow:var(--shadow-card);}
.side-card h3{font-size:17px;margin-bottom:14px;}
.info-row{display:flex;gap:10px;padding:10px 0;border-bottom:1px dashed rgba(120,200,255,.12);font-size:14px;}
.info-row:last-of-type{border-bottom:none;}
.info-row .k{color:var(--text-3);flex:0 0 78px;}
.info-row .v{color:var(--text-1);}
.side-link{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:11px 12px;border-radius:var(--radius-s);font-size:14px;color:var(--text-2);border:1px solid transparent;transition:all .2s ease;}
.side-link:hover{color:var(--primary);background:rgba(47,216,198,.08);border-color:rgba(47,216,198,.22);transform:translateX(2px);}

/* 图文交错 */
.feature-row{display:grid;grid-template-columns:1.02fr .98fr;gap:46px;align-items:center;padding:56px 0;border-bottom:1px solid rgba(120,200,255,.09);}
.feature-row:last-child{border-bottom:none;}
.feature-row.is-reverse .feature-media{order:2;}
.feature-media{border-radius:var(--radius-m);overflow:hidden;border:1px solid var(--line);position:relative;aspect-ratio:16/10;background:linear-gradient(135deg,#10203a,#0a1220);}
.feature-media img{width:100%;height:100%;object-fit:cover;}
.feature-media::after{content:attr(data-initial);position:absolute;inset:0;display:grid;place-items:center;font-size:34px;font-weight:700;color:rgba(47,216,198,.35);opacity:0;transition:opacity .2s ease;}
.feature-media.is-empty::after{opacity:1;}
.feature-body h3{font-size:22px;margin-bottom:14px;}
.feature-body p{color:var(--text-2);line-height:1.9;}
.feature-body .bullet-list{margin-top:16px;margin-bottom:0;}
.step-index{display:inline-flex;align-items:center;justify-content:center;width:30px;height:30px;border-radius:9px;border:1px solid rgba(47,216,198,.35);color:var(--primary);font-size:13px;font-weight:700;margin-bottom:14px;}

/* 标签云 */
.tag-cloud{display:flex;flex-wrap:wrap;gap:10px;}
.tag-cloud a{display:inline-flex;align-items:center;font-size:13px;color:var(--text-2);background:rgba(18,28,48,.6);border:1px solid var(--line);border-radius:999px;padding:8px 15px;transition:all .2s ease;}
.tag-cloud a:hover{color:var(--primary);border-color:rgba(47,216,198,.42);transform:translateY(-2px);}

/* FAQ */
.faq-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;}
.faq-item{background:var(--glass);border:1px solid var(--line);border-radius:var(--radius-m);padding:2px 20px;backdrop-filter:blur(12px);transition:border-color .22s ease,background .22s ease;}
.faq-item:hover{border-color:rgba(47,216,198,.28);}
.faq-item[open]{border-color:rgba(47,216,198,.4);background:rgba(18,28,48,.72);}
.faq-item summary{list-style:none;cursor:pointer;display:flex;align-items:flex-start;justify-content:space-between;gap:14px;padding:17px 0;font-size:16px;font-weight:600;color:var(--text-1);line-height:1.6;}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{content:'+';flex:0 0 auto;width:22px;height:22px;display:grid;place-items:center;border-radius:7px;border:1px solid var(--line);color:var(--primary);font-size:15px;font-weight:600;transition:transform .22s ease;}
.faq-item[open] summary::after{transform:rotate(45deg);}
.faq-item .faq-body{padding:0 0 18px;color:var(--text-2);font-size:15px;line-height:1.85;}

/* 分类入口卡 */
.cat-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;}
.cat-card{display:flex;flex-direction:column;background:var(--glass);border:1px solid var(--line);border-radius:var(--radius-m);overflow:hidden;backdrop-filter:blur(12px);box-shadow:var(--shadow-card);transition:transform .22s ease-out,border-color .22s ease-out,box-shadow .22s ease-out;}
.cat-card:hover{transform:translateY(-4px);border-color:rgba(47,216,198,.3);box-shadow:0 18px 38px -18px rgba(0,0,0,.85);}
.cat-media{position:relative;aspect-ratio:16/10;background:linear-gradient(135deg,#10203a,#0a1220);}
.cat-media img{width:100%;height:100%;object-fit:cover;}
.cat-media::after{content:attr(data-initial);position:absolute;inset:0;display:grid;place-items:center;font-size:26px;font-weight:700;color:rgba(47,216,198,.35);opacity:0;}
.cat-media.is-empty::after{opacity:1;}
.cat-body{padding:18px;display:flex;flex-direction:column;gap:8px;flex:1;}
.cat-body h3{font-size:17px;}
.cat-body p{font-size:14px;color:var(--text-2);line-height:1.75;flex:1;}
.cat-body .go{font-size:13px;color:var(--primary);font-weight:600;}
.badge{display:inline-flex;align-items:center;font-size:12px;padding:3px 10px;border-radius:999px;border:1px solid rgba(47,216,198,.35);background:rgba(47,216,198,.08);color:var(--primary);}
.badge-accent{border-color:rgba(255,122,69,.4);background:rgba(255,122,69,.1);color:var(--accent);}

/* 表单 */
.form-block{display:grid;grid-template-columns:.85fr 1.15fr;gap:44px;align-items:start;background:var(--glass);border:1px solid var(--line);border-radius:var(--radius-l);padding:40px;backdrop-filter:blur(12px);box-shadow:var(--shadow-card);}
.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;}
.form-field{display:flex;flex-direction:column;gap:7px;}
.form-field.full{grid-column:1 / -1;}
.form-field label{font-size:13px;color:var(--text-2);}
.field{width:100%;background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius-s);padding:11px 13px;color:var(--text-1);font-size:14px;font-family:inherit;transition:border-color .2s ease,box-shadow .2s ease;}
.field::placeholder{color:var(--text-3);}
.field:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(47,216,198,.18);}
select.field{appearance:none;background-image:linear-gradient(45deg,transparent 50%,var(--text-2) 50%),linear-gradient(135deg,var(--text-2) 50%,transparent 50%);background-position:calc(100% - 18px) 50%,calc(100% - 13px) 50%;background-size:5px 5px,5px 5px;background-repeat:no-repeat;}
select.field option{background:#121C30;color:var(--text-1);}
textarea.field{min-height:110px;resize:vertical;}

/* CTA */
.cta-band{display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;background:linear-gradient(120deg,rgba(18,28,48,.85),rgba(18,28,48,.5));border:1px solid var(--line);border-radius:var(--radius-l);padding:36px 34px;backdrop-filter:blur(12px);box-shadow:var(--shadow-card);}
.cta-band h2{font-size:26px;margin-bottom:10px;}
.cta-band p{color:var(--text-2);font-size:15px;}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;}
.cta-meter{display:inline-flex;align-items:center;gap:8px;margin-top:14px;font-size:13px;color:var(--accent-2);background:rgba(255,176,32,.08);border:1px solid rgba(255,176,32,.28);border-radius:999px;padding:6px 13px;}

/* 页脚 */
.site-footer{background:var(--bg-1);border-top:1px solid var(--line);margin-top:20px;padding:64px 0 24px;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:38px;}
.footer-note{font-size:13px;color:var(--text-2);line-height:1.9;margin-top:14px;max-width:340px;}
.footer-contact{font-size:13px;color:var(--text-3);line-height:1.9;margin-top:14px;}
.footer-title{font-size:14px;color:var(--primary);font-weight:600;margin-bottom:16px;}
.footer-link{display:block;font-size:14px;color:var(--text-2);padding:5px 0;transition:color .2s ease,transform .2s ease;}
.footer-link:hover{color:var(--primary);transform:translateX(2px);}
.subscribe{display:flex;gap:10px;margin-top:14px;flex-wrap:wrap;}
.subscribe .field{flex:1 1 160px;min-width:0;}
.footer-bottom{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-top:44px;padding-top:20px;border-top:1px solid rgba(120,200,255,.1);font-size:13px;color:var(--text-3);}
.footer-bottom a{color:var(--text-3);transition:color .2s ease;}
.footer-bottom a:hover{color:var(--primary);}

/* 返回顶部 */
.to-top{position:fixed;right:22px;bottom:26px;width:46px;height:46px;border-radius:50%;display:grid;place-items:center;background:var(--glass);border:1px solid var(--line);backdrop-filter:blur(10px);color:var(--text-1);cursor:pointer;opacity:0;visibility:hidden;transform:translateY(8px);transition:all .25s ease;z-index:50;font-size:16px;}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{color:var(--primary);border-color:rgba(47,216,198,.5);box-shadow:var(--shadow-glow);}

/* 骨架屏 */
.skeleton{background:linear-gradient(90deg,rgba(120,200,255,.06) 25%,rgba(120,200,255,.14) 37%,rgba(120,200,255,.06) 63%);background-size:400% 100%;animation:shimmer 1.4s ease infinite;border-radius:8px;}
@keyframes shimmer{0%{background-position:100% 0;}100%{background-position:0 0;}}

/* 响应式 */
@media (max-width:1180px){
  .mega{width:700px;left:-120px;}
  .cat-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:1024px){
  .nav-list{display:none;}
  .nav-toggle{display:grid;}
  .hide-md{display:none !important;}
  .split{grid-template-columns:1fr;gap:32px;}
  .sticky-card{position:static;}
  .feature-row{grid-template-columns:1fr;gap:26px;padding:44px 0;}
  .feature-row.is-reverse .feature-media{order:0;}
  .form-block{grid-template-columns:1fr;padding:30px 24px;}
  .stat-grid{grid-template-columns:repeat(2,1fr);}
  .stat-cell:nth-child(2){border-right:none;}
  .stat-cell:nth-child(1),.stat-cell:nth-child(2){border-bottom:1px solid var(--line);}
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:820px){
  .faq-grid{grid-template-columns:1fr;}
  .section{padding:56px 0;}
  .page-hero{padding:78px 0 58px;}
  .page-hero h1{font-size:30px;}
  .prose h2,.section-title{font-size:24px;}
  .cta-band{padding:26px 20px;}
  .cta-band h2{font-size:22px;}
}
@media (max-width:640px){
  .site-container{padding:0 16px;}
  .cat-grid{grid-template-columns:1fr;}
  .form-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
  .stat-grid{grid-template-columns:1fr;}
  .stat-cell{border-right:none;border-bottom:1px solid var(--line);}
  .stat-cell:last-child{border-bottom:none;}
  .page-hero h1{font-size:26px;}
  .brand{font-size:15px;}
  .section{padding:48px 0;}
  .to-top{right:16px;bottom:18px;}
}