/* roulang page: index */
:root{
  --bg-deep:#050914;
  --bg-mid:#0A1128;
  --bg-card:#0E1630;
  --glass:rgba(18,28,58,.55);
  --glass-line:rgba(120,160,255,.16);
  --primary:#2E6BFF;
  --cyan:#22E0C8;
  --ember:#FF7A45;
  --t1:#F2F5FF;
  --t2:#A9B6D6;
  --t3:#6B7BA3;
  --line:rgba(120,160,255,.14);
  --r-lg:18px;
  --r-md:12px;
  --r-sm:8px;
  --shadow-card:0 8px 30px rgba(0,0,0,.45);
  --ease:cubic-bezier(.2,.7,.3,1);
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:
    radial-gradient(900px 520px at 12% -8%, rgba(46,107,255,.16), transparent 62%),
    radial-gradient(760px 420px at 92% 6%, rgba(34,224,200,.10), transparent 60%),
    var(--bg-deep);
  color:var(--t2);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe 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:var(--cyan);text-decoration:none;transition:color .25s var(--ease);}
a:hover{color:var(--t1);}
h1,h2,h3,h4{color:var(--t1);margin:0;font-weight:700;line-height:1.25;letter-spacing:-.01em;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
::selection{background:rgba(34,224,200,.28);color:#fff;}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px;}

.container{max-width:1200px;padding-left:20px;padding-right:20px;margin:0 auto;}
@media (min-width:1400px){.container{max-width:1280px;}}
@media (min-width:768px){.container{padding-left:32px;padding-right:32px;}}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(5,9,20,.55);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  border-bottom:1px solid rgba(120,160,255,.10);
  transition:background .25s var(--ease),box-shadow .25s var(--ease),border-color .25s var(--ease);
}
.site-header.is-stuck{
  background:rgba(5,9,20,.86);
  border-bottom-color:rgba(34,224,200,.28);
  box-shadow:0 10px 34px rgba(0,0,0,.5),0 1px 0 rgba(34,224,200,.18);
}
.nav-wrap{display:flex;align-items:center;gap:24px;height:72px;transition:height .25s var(--ease);}
.site-header.is-stuck .nav-wrap{height:64px;}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{
  width:38px;height:38px;border-radius:11px;display:grid;place-items:center;
  background:linear-gradient(150deg,rgba(46,107,255,.9),rgba(34,224,200,.55));
  box-shadow:0 0 18px rgba(46,107,255,.45),inset 0 1px 0 rgba(255,255,255,.35);
  color:#031024;font-size:17px;
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-name{color:var(--t1);font-size:17px;font-weight:800;letter-spacing:.01em;}
.brand-sub{color:var(--t3);font-size:10px;letter-spacing:.12em;font-weight:600;}
.nav-menu{display:flex;align-items:center;gap:4px;margin-left:12px;}
.nav-menu a{
  position:relative;display:inline-block;padding:8px 13px;border-radius:9px;
  color:var(--t2);font-size:14.5px;font-weight:500;transition:color .22s var(--ease),background .22s var(--ease);
}
.nav-menu a:hover{color:var(--t1);background:rgba(120,160,255,.08);}
.nav-menu a.active{color:var(--t1);}
.nav-menu a.active::after{
  content:"";position:absolute;left:13px;right:13px;bottom:2px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--cyan),rgba(34,224,200,0));
  box-shadow:0 0 10px rgba(34,224,200,.7);
}
.nav-right{display:flex;align-items:center;gap:14px;margin-left:auto;}
.nav-search{
  display:flex;align-items:center;gap:8px;
  background:rgba(16,26,54,.7);border:1px solid var(--glass-line);
  border-radius:999px;padding:7px 14px;transition:border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.nav-search i{color:var(--cyan);font-size:13px;}
.nav-search input{
  background:transparent;border:0;outline:none;color:var(--t1);
  font-size:13.5px;width:132px;
}
.nav-search input::placeholder{color:var(--t3);}
.nav-search:focus-within{border-color:rgba(34,224,200,.55);box-shadow:0 0 0 3px rgba(34,224,200,.12);}
.btn-cta{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 24px;border-radius:999px;
  background:linear-gradient(135deg,#FF8A5B,#FF7A45);
  color:#1A0A02;font-size:15px;font-weight:700;letter-spacing:.01em;
  box-shadow:0 0 0 1px rgba(255,122,69,.5),0 0 24px rgba(255,122,69,.32);
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),filter .25s var(--ease);
  white-space:nowrap;
}
.btn-cta:hover{color:#1A0A02;transform:translateY(-2px);filter:brightness(1.08);box-shadow:0 0 0 1px rgba(255,122,69,.65),0 0 30px rgba(255,122,69,.5);}
.btn-cta:active{transform:translateY(0);}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:11px;
  border:1px solid var(--glass-line);background:rgba(16,26,54,.7);
  color:var(--t1);font-size:16px;cursor:pointer;transition:border-color .25s var(--ease);
}
.nav-toggle:hover{border-color:rgba(34,224,200,.5);}

/* 抽屉 */
.drawer{
  position:fixed;inset:0;z-index:1200;pointer-events:none;
}
.drawer-backdrop{
  position:absolute;inset:0;background:rgba(3,6,16,.7);backdrop-filter:blur(4px);
  opacity:0;transition:opacity .3s var(--ease);
}
.drawer-panel{
  position:absolute;top:0;right:0;bottom:0;width:min(360px,88vw);
  background:rgba(10,17,40,.96);backdrop-filter:blur(18px) saturate(150%);
  border-left:1px solid rgba(120,160,255,.18);
  padding:24px 22px;display:flex;flex-direction:column;gap:18px;
  transform:translateX(100%);transition:transform .32s var(--ease);
  overflow-y:auto;
}
.drawer.open{pointer-events:auto;}
.drawer.open .drawer-backdrop{opacity:1;}
.drawer.open .drawer-panel{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;}
.drawer-close{
  width:38px;height:38px;border-radius:10px;border:1px solid var(--glass-line);
  background:transparent;color:var(--t1);font-size:16px;cursor:pointer;
}
.drawer-links{display:flex;flex-direction:column;gap:6px;}
.drawer-links a{
  display:block;padding:12px 14px;border-radius:12px;color:var(--t1);
  font-size:16px;font-weight:600;border:1px solid transparent;
  transition:background .2s var(--ease),border-color .2s var(--ease);
}
.drawer-links a:hover,.drawer-links a.active{background:rgba(46,107,255,.14);border-color:rgba(34,224,200,.3);color:var(--t1);}
.drawer .btn-cta{width:100%;}

/* ---------- Hero ---------- */
.hero{position:relative;padding:76px 0 84px;overflow:hidden;}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(120,160,255,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(120,160,255,.05) 1px,transparent 1px);
  background-size:48px 48px;
  mask-image:radial-gradient(70% 60% at 50% 20%,#000 20%,transparent 85%);
  -webkit-mask-image:radial-gradient(70% 60% at 50% 20%,#000 20%,transparent 85%);
}
.hero .container{position:relative;z-index:2;}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 15px;border-radius:999px;font-size:12.5px;font-weight:600;
  color:var(--cyan);border:1px solid rgba(34,224,200,.42);
  background:rgba(34,224,200,.07);letter-spacing:.04em;
}
.hero-badge .dot{width:6px;height:6px;border-radius:50%;background:var(--cyan);box-shadow:0 0 10px var(--cyan);}
.hero h1{
  font-size:clamp(30px,4vw,52px);font-weight:800;line-height:1.16;letter-spacing:-.01em;
  margin:20px 0 18px;color:var(--t1);
}
.hero h1 .hl{
  background:linear-gradient(100deg,#8FB6FF,#22E0C8 70%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-sub{font-size:17px;line-height:1.85;color:var(--t2);max-width:560px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}
.btn-primary-glow{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  height:48px;padding:0 28px;border-radius:999px;
  background:linear-gradient(135deg,#FF8A5B,#FF7A45);
  color:#1A0A02;font-size:16px;font-weight:700;
  box-shadow:0 0 0 1px rgba(255,122,69,.5),0 0 24px rgba(255,122,69,.34);
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),filter .25s var(--ease);
}
.btn-primary-glow:hover{color:#1A0A02;transform:translateY(-2px);filter:brightness(1.08);box-shadow:0 0 0 1px rgba(255,122,69,.7),0 0 34px rgba(255,122,69,.52);}
.btn-primary-glow:active{transform:translateY(0);}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  height:48px;padding:0 26px;border-radius:999px;
  background:transparent;border:1px solid rgba(34,224,200,.5);
  color:var(--cyan);font-size:16px;font-weight:600;
  transition:background .25s var(--ease),transform .25s var(--ease),border-color .25s var(--ease);
}
.btn-ghost:hover{background:rgba(34,224,200,.1);color:var(--t1);border-color:var(--cyan);transform:translateY(-2px);}
.trust-row{display:flex;flex-wrap:wrap;gap:10px 26px;margin-top:32px;}
.trust-row li{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--t3);}
.trust-row i{color:var(--cyan);font-size:12px;}

.hero-visual{position:relative;}
.hero-visual .frame{
  position:relative;border-radius:22px;overflow:hidden;
  border:1px solid var(--glass-line);
  box-shadow:var(--shadow-card);
}
.hero-visual .frame img{width:100%;height:430px;object-fit:cover;filter:saturate(1.06) contrast(1.03);}
.hero-visual .frame::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(155deg,rgba(5,9,20,.12) 8%,rgba(5,9,20,.82) 82%);
}
.hero-visual .orb{
  position:absolute;border-radius:50%;filter:blur(90px);pointer-events:none;z-index:0;
}
.hero-visual .orb.a{width:220px;height:220px;background:rgba(46,107,255,.5);top:-40px;left:-40px;}
.hero-visual .orb.b{width:200px;height:200px;background:rgba(34,224,200,.34);bottom:-30px;right:-30px;}
.hero-stats{
  position:absolute;right:20px;bottom:20px;z-index:3;
  display:grid;grid-template-columns:1fr 1fr;gap:14px;
  padding:18px 20px;border-radius:16px;
  background:rgba(14,22,48,.82);border:1px solid rgba(120,160,255,.22);
  backdrop-filter:blur(14px) saturate(140%);
  box-shadow:0 12px 34px rgba(0,0,0,.5);
  width:min(300px,calc(100% - 40px));
}
.hero-stats .num{
  font-size:22px;font-weight:800;color:var(--t1);
  font-variant-numeric:tabular-nums;letter-spacing:-.02em;
  border-bottom:1px solid rgba(34,224,200,.4);
  display:inline-block;padding-bottom:2px;
  text-shadow:0 0 14px rgba(34,224,200,.45);
}
.hero-stats .lbl{font-size:12px;color:var(--t3);margin-top:4px;}

/* ---------- 区块通用 ---------- */
.section{padding:84px 0;}
.section.alt{background:linear-gradient(180deg,rgba(10,17,40,.0),rgba(10,17,40,.72) 30%,rgba(10,17,40,.0));}
.section-head{margin-bottom:36px;max-width:720px;}
.section-head .kick{
  display:inline-block;font-size:12px;font-weight:700;letter-spacing:.16em;
  color:var(--cyan);margin-bottom:12px;
}
.section-head h2{font-size:clamp(24px,2.6vw,32px);font-weight:700;}
.section-head p{margin-top:12px;color:var(--t2);font-size:15.5px;}
.section-head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:36px;}
.link-more{font-size:14.5px;font-weight:600;color:var(--cyan);display:inline-flex;align-items:center;gap:6px;}
.link-more i{transition:transform .25s var(--ease);}
.link-more:hover i{transform:translateX(3px);}

/* ---------- Bento ---------- */
.bento{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.glass-card{
  background:rgba(18,28,58,.55);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  border:1px solid var(--glass-line);
  border-radius:var(--r-lg);
  box-shadow:var(--shadow-card);
  transition:transform .28s var(--ease),border-color .28s var(--ease),box-shadow .28s var(--ease);
}
.bento-big{
  grid-column:span 2;grid-row:span 2;
  position:relative;overflow:hidden;display:flex;flex-direction:column;
  min-height:340px;text-decoration:none;
}
.bento-big img{
  position:absolute;inset:0;width:100%;height:100%;object-fit:cover;
  filter:saturate(1.05);transition:transform .5s var(--ease);
}
.bento-big::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(170deg,rgba(5,9,20,.35) 10%,rgba(5,9,20,.92) 88%);
}
.bento-big .inner{position:relative;z-index:2;margin-top:auto;padding:28px;}
.bento-big h3{font-size:24px;margin-bottom:10px;}
.bento-big p{font-size:14.5px;color:var(--t2);max-width:400px;}
.bento-big:hover img{transform:scale(1.04);}
.bento-small{
  display:flex;flex-direction:column;gap:12px;padding:22px;min-height:160px;
  text-decoration:none;position:relative;overflow:hidden;
}
.bento-small .ico{
  width:42px;height:42px;border-radius:12px;display:grid;place-items:center;
  background:rgba(46,107,255,.16);border:1px solid rgba(46,107,255,.3);
  color:var(--cyan);font-size:16px;
}
.bento-small h3{font-size:17px;font-weight:600;}
.bento-small p{font-size:13.5px;color:var(--t3);line-height:1.7;}
.bento-small::before{
  content:"";position:absolute;top:0;left:0;width:56%;height:1px;
  background:linear-gradient(90deg,rgba(180,215,255,.55),transparent);
  transform:skewX(-32deg);transform-origin:left;
}
.glass-card:hover,.bento-small:hover,.bento-big:hover{
  border-color:rgba(34,224,200,.55);
  box-shadow:0 8px 30px rgba(0,0,0,.45),0 0 26px rgba(34,224,200,.14);
}
.bento-small:hover,.bento-big:hover{transform:translateY(-4px);}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:999px;font-size:12px;font-weight:600;
  border:1px solid rgba(34,224,200,.4);color:var(--cyan);background:rgba(34,224,200,.07);
  width:fit-content;letter-spacing:.02em;
}
.tag-blue{border-color:rgba(46,107,255,.45);color:#9CC0FF;background:rgba(46,107,255,.12);}
.tag-ember{border-color:rgba(255,122,69,.5);color:#FFB394;background:rgba(255,122,69,.12);}

/* ---------- 最新信息 ---------- */
.info-card{
  display:flex;flex-direction:column;gap:12px;padding:24px;height:100%;
  text-decoration:none;border-radius:var(--r-lg);
}
.info-card h3{
  font-size:17.5px;font-weight:600;line-height:1.5;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  color:var(--t1);
}
.info-card p{
  font-size:14px;color:var(--t2);line-height:1.8;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.info-card .meta{
  font-size:12.5px;color:var(--t3);margin-top:auto;
  font-variant-numeric:tabular-nums;letter-spacing:.02em;
}
.empty-state{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
  min-height:190px;padding:32px;text-align:center;
}
.empty-state i{font-size:26px;color:var(--cyan);opacity:.85;}
.empty-state p{color:var(--t3);font-size:14.5px;}

/* ---------- 评价轮播 ---------- */
.review-card{padding:26px 24px;height:100%;display:flex;flex-direction:column;gap:14px;}
.review-top{display:flex;align-items:center;gap:12px;}
.avatar{
  width:44px;height:44px;border-radius:50%;overflow:hidden;flex-shrink:0;
  border:1px solid rgba(34,224,200,.35);
}
.avatar img{width:100%;height:100%;object-fit:cover;}
.review-name{color:var(--t1);font-size:15px;font-weight:600;}
.review-role{font-size:12px;color:var(--t3);}
.stars{color:var(--ember);font-size:12px;letter-spacing:2px;}
.review-card p{font-size:14.5px;color:var(--t2);line-height:1.8;}
.review-src{font-size:12px;color:var(--t3);margin-top:auto;}
#reviewCarousel .carousel-control-prev,
#reviewCarousel .carousel-control-next{width:46px;height:46px;top:50%;transform:translateY(-50%);border-radius:50%;opacity:1;background:rgba(18,28,58,.8);border:1px solid var(--glass-line);box-shadow:0 8px 24px rgba(0,0,0,.4);transition:border-color .25s var(--ease),background .25s var(--ease);}
#reviewCarousel .carousel-control-prev{left:-14px;}
#reviewCarousel .carousel-control-next{right:-14px;}
#reviewCarousel .carousel-control-prev:hover,
#reviewCarousel .carousel-control-next:hover{border-color:var(--cyan);background:rgba(34,224,200,.14);}
#reviewCarousel .carousel-control-prev-icon,
#reviewCarousel .carousel-control-next-icon{width:14px;height:14px;}
#reviewCarousel .carousel-indicators{bottom:-38px;}
#reviewCarousel .carousel-indicators [data-bs-target]{
  width:22px;height:3px;border-radius:2px;background:rgba(120,160,255,.35);
  border:0;opacity:1;transition:background .25s var(--ease),width .25s var(--ease);
}
#reviewCarousel .carousel-indicators .active{background:var(--cyan);width:34px;box-shadow:0 0 10px rgba(34,224,200,.6);}
@media (max-width:1199px){
  #reviewCarousel .carousel-control-prev,#reviewCarousel .carousel-control-next{display:none;}
}

/* ---------- 保障条 ---------- */
.guard-bar{padding:8px 0;border-radius:var(--r-lg);}
.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 i{font-size:18px;color:var(--cyan);margin-bottom:12px;display:block;}
.guard-item h3{font-size:15.5px;font-weight:600;margin-bottom:6px;}
.guard-item p{font-size:13.5px;color:var(--t3);line-height:1.7;}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;overflow:hidden;border-radius:24px;padding:52px 44px;
  background:linear-gradient(120deg,rgba(18,28,58,.9),rgba(10,17,40,.86));
  border:1px solid rgba(120,160,255,.2);
  box-shadow:var(--shadow-card);
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
}
.cta-band::before{
  content:"";position:absolute;right:-60px;top:-80px;width:280px;height:280px;border-radius:50%;
  background:rgba(34,224,200,.28);filter:blur(100px);pointer-events:none;
}
.cta-band::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(120,160,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(120,160,255,.05) 1px,transparent 1px);
  background-size:40px 40px;
  mask-image:radial-gradient(60% 80% at 80% 40%,#000,transparent 80%);
  -webkit-mask-image:radial-gradient(60% 80% at 80% 40%,#000,transparent 80%);
}
.cta-band .txt{position:relative;z-index:2;max-width:620px;}
.cta-band h2{font-size:clamp(22px,2.4vw,30px);margin-bottom:12px;}
.cta-band p{font-size:15px;color:var(--t2);}
.cta-band .act{position:relative;z-index:2;}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:860px;}
.accordion-item{
  background:rgba(18,28,58,.5);border:1px solid var(--glass-line)!important;
  border-radius:var(--r-md)!important;margin-bottom:12px;overflow:hidden;
  backdrop-filter:blur(12px);
}
.accordion-button{
  background:transparent!important;color:var(--t1)!important;
  font-size:16px;font-weight:600;padding:20px 22px;
  box-shadow:none!important;border-radius:var(--r-md)!important;
  position:relative;
}
.accordion-button::after{
  background-image:none;content:"\f078";font-family:"Font Awesome 6 Free";font-weight:900;
  color:var(--cyan);font-size:12px;width:auto;height:auto;
  transition:transform .3s var(--ease);
}
.accordion-button:not(.collapsed)::after{transform:rotate(180deg);}
.accordion-button:not(.collapsed){color:var(--cyan)!important;}
.accordion-item:has(.accordion-button:not(.collapsed)){border-color:rgba(34,224,200,.4)!important;}
.accordion-button:not(.collapsed)::before{
  content:"";position:absolute;left:0;top:12px;bottom:12px;width:3px;border-radius:2px;
  background:var(--cyan);box-shadow:0 0 12px rgba(34,224,200,.8);
}
.accordion-body{padding:0 22px 22px;color:var(--t2);font-size:14.5px;line-height:1.85;}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:24px;padding:64px 0 0;
  background:linear-gradient(180deg,rgba(10,17,40,.2),rgba(8,13,32,.95));
  border-top:1px solid var(--line);
}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:36px;}
.footer-brand .brand{margin-bottom:18px;}
.footer-brand p{font-size:14px;color:var(--t3);line-height:1.85;max-width:330px;}
.footer-col h4{font-size:14px;font-weight:700;color:var(--t1);margin-bottom:16px;letter-spacing:.04em;}
.footer-col ul{display:flex;flex-direction:column;gap:11px;}
.footer-col a{font-size:14px;color:var(--t3);}
.footer-col a:hover{color:var(--cyan);}
.footer-note{
  display:flex;align-items:center;gap:10px;margin-top:22px;flex-wrap:wrap;
}
.footer-note span{
  font-size:12px;color:var(--t3);border:1px solid var(--line);
  border-radius:999px;padding:3px 12px;
}
.footer-bottom{
  margin-top:48px;padding:22px 0;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--t3);
}
.footer-bottom a{color:var(--t3);}
.footer-bottom a:hover{color:var(--cyan);}

/* ---------- 返回顶部 ---------- */
.to-top{
  position:fixed;right:24px;bottom:24px;z-index:1000;
  width:46px;height:46px;border-radius:50%;
  background:rgba(18,28,58,.85);border:1px solid var(--glass-line);
  color:var(--cyan);display:grid;place-items:center;font-size:15px;cursor:pointer;
  box-shadow:0 8px 26px rgba(0,0,0,.5);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .3s var(--ease),transform .3s var(--ease),visibility .3s,border-color .25s var(--ease);
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{border-color:var(--cyan);background:rgba(34,224,200,.16);}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .nav-search{display:none;}
}
@media (max-width:991px){
  .nav-menu{display:none;}
  .nav-toggle{display:grid;place-items:center;}
  .nav-wrap{gap:14px;}
  .hero{padding:56px 0 64px;}
  .hero-visual .frame img{height:340px;}
  .bento{grid-template-columns:repeat(2,1fr);}
  .bento-big{grid-column:span 2;grid-row:span 1;min-height:280px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .guard-grid{grid-template-columns:repeat(2,1fr);}
  .guard-item:nth-child(2){border-right:0;}
  .guard-item:nth-child(1),.guard-item:nth-child(2){border-bottom:1px solid var(--line);}
  .cta-band{padding:40px 28px;}
}
@media (max-width:767px){
  .section{padding:56px 0;}
  .hero h1{margin:16px 0 14px;}
  .hero-sub{font-size:15.5px;}
  .hero-actions{gap:12px;}
  .btn-primary-glow,.btn-ghost{width:100%;}
  .hero-stats{position:relative;right:auto;bottom:auto;width:100%;margin-top:16px;grid-template-columns:1fr 1fr;}
  .hero-visual .frame img{height:260px;}
  .bento{grid-template-columns:1fr;}
  .bento-big{grid-column:span 1;}
  .cta-band{flex-direction:column;align-items:flex-start;}
  .cta-band .act{width:100%;}
  .cta-band .act .btn-primary-glow{width:100%;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .review-card{padding:22px 18px;}
}
@media (max-width:519px){
  .hero{padding:44px 0 52px;}
  .hero-badge{font-size:11.5px;padding:5px 12px;}
  .trust-row{gap:8px 18px;}
  .guard-grid{grid-template-columns:1fr;}
  .guard-item{border-right:0;border-bottom:1px solid var(--line);}
  .guard-item:last-child{border-bottom:0;}
  .brand-name{font-size:15.5px;}
  .to-top{right:16px;bottom:16px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms!important;transition-duration:.001ms!important;scroll-behavior:auto!important;}
}

/* roulang page: article */
:root{
  --bg-deep:#050914;
  --bg-mid:#0A1128;
  --bg-card:#0E1630;
  --glass:rgba(18,28,58,0.55);
  --glass-line:rgba(120,160,255,0.16);
  --primary:#2E6BFF;
  --cyan:#22E0C8;
  --ember:#FF7A45;
  --t1:#F2F5FF;
  --t2:#A9B6D6;
  --t3:#6B7BA3;
  --line:rgba(120,160,255,0.14);
  --r-lg:18px;
  --r-md:12px;
  --r-sm:10px;
  --shadow:0 8px 30px rgba(0,0,0,0.45);
  --glow:0 0 24px rgba(34,224,200,0.22);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"SF Mono","JetBrains Mono","Roboto Mono",Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  background:var(--bg-deep);
  color:var(--t2);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  background-image:
    linear-gradient(rgba(120,160,255,0.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(120,160,255,0.05) 1px,transparent 1px);
  background-size:48px 48px;
  opacity:.55;
  pointer-events:none;
  z-index:0;
}
img{max-width:100%;display:block}
a{color:var(--cyan);text-decoration:none;transition:color .22s var(--ease)}
a:hover{color:#6BF3E2}
h1,h2,h3,h4,h5{color:var(--t1);margin:0;font-weight:700;line-height:1.3}
p{margin:0 0 18px}
ul,ol{margin:0 0 18px;padding-left:22px}
button{font-family:inherit}
::selection{background:rgba(34,224,200,0.28);color:#fff}
.container{max-width:1200px;margin:0 auto;padding-left:20px;padding-right:20px;position:relative;z-index:1}
@media(min-width:768px){.container{padding-left:32px;padding-right:32px}}
@media(min-width:1440px){.container{max-width:1280px}}

/* ---------- 阅读进度 ---------- */
.read-progress{
  position:fixed;top:0;left:0;height:3px;width:0;
  background:linear-gradient(90deg,var(--primary),var(--cyan));
  box-shadow:0 0 14px rgba(34,224,200,.5);
  z-index:1200;transition:width .1s linear;
}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:1100;
  background:rgba(5,9,20,0.6);
  backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  border-bottom:1px solid var(--line);
  transition:background .25s var(--ease),box-shadow .25s var(--ease);
}
.site-header.is-stuck{
  background:rgba(5,9,20,0.9);
  border-bottom-color:rgba(34,224,200,0.35);
  box-shadow:0 6px 28px rgba(0,0,0,.5);
}
.nav-wrap{display:flex;align-items:center;gap:18px;height:72px;transition:height .25s var(--ease)}
.site-header.is-stuck .nav-wrap{height:64px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:38px;height:38px;border-radius:11px;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(140deg,rgba(46,107,255,.9),rgba(34,224,200,.75));
  color:#04101f;font-size:16px;
  box-shadow:0 0 18px rgba(46,107,255,.4);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-name{color:var(--t1);font-size:17px;font-weight:800;letter-spacing:.02em}
.brand-sub{color:var(--cyan);font-size:11px;letter-spacing:.14em;font-weight:600}
.brand:hover .brand-name{color:#fff}
.nav-menu{display:flex;align-items:center;gap:4px;margin-left:8px;flex:1}
.nav-menu a{
  position:relative;color:var(--t2);font-size:15px;font-weight:500;
  padding:8px 14px;border-radius:9px;white-space:nowrap;
  transition:color .2s var(--ease),background .2s var(--ease);
}
.nav-menu a::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;
  background:var(--cyan);border-radius:2px;transform:scaleX(0);transform-origin:left;
  transition:transform .25s var(--ease);
}
.nav-menu a:hover{color:var(--t1);background:rgba(120,160,255,.07)}
.nav-menu a:hover::after,.nav-menu a.active::after{transform:scaleX(1)}
.nav-menu a.active{color:var(--t1);font-weight:700}
.nav-right{display:flex;align-items:center;gap:12px;flex-shrink:0}
.nav-search{
  display:flex;align-items:center;gap:8px;
  background:rgba(14,22,48,.75);
  border:1px solid var(--glass-line);
  border-radius:999px;padding:7px 14px;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.nav-search i{color:var(--cyan);font-size:13px}
.nav-search input{
  background:transparent;border:0;outline:none;color:var(--t1);
  font-size:13px;width:158px;
}
.nav-search input::placeholder{color:var(--t3)}
.nav-search:focus-within{border-color:var(--cyan);box-shadow:0 0 0 3px rgba(34,224,200,.14)}
.btn-cta{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:42px;padding:0 20px;border-radius:999px;
  background:var(--ember);color:#200C04;font-size:14px;font-weight:800;
  box-shadow:0 0 20px rgba(255,122,69,.32);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),filter .2s var(--ease);
  white-space:nowrap;
}
.btn-cta:hover{color:#200C04;filter:brightness(1.08);transform:translateY(-2px);box-shadow:0 0 26px rgba(255,122,69,.5)}
.btn-cta:active{transform:translateY(0)}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:11px;
  background:rgba(14,22,48,.85);border:1px solid var(--glass-line);
  color:var(--t1);font-size:16px;cursor:pointer;
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan)}

/* ---------- 文章页头部 ---------- */
.article-hero{
  position:relative;padding:52px 0 34px;
  border-bottom:1px solid var(--line);
  background:
    radial-gradient(720px 320px at 12% -10%,rgba(46,107,255,.20),transparent 70%),
    radial-gradient(560px 300px at 88% 0%,rgba(34,224,200,.13),transparent 72%),
    var(--bg-mid);
  overflow:hidden;
}
.article-hero::after{
  content:"";position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(120,160,255,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(120,160,255,.05) 1px,transparent 1px);
  background-size:48px 48px;opacity:.6;pointer-events:none;
}
.breadcrumb-line{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--t3);margin-bottom:20px;
}
.breadcrumb-line a{color:var(--t3)}
.breadcrumb-line a:hover{color:var(--cyan)}
.breadcrumb-line .sep{color:rgba(120,160,255,.35)}
.breadcrumb-line .current{color:var(--t2);max-width:420px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.badge-cat{
  display:inline-flex;align-items:center;gap:7px;
  padding:5px 14px;border-radius:999px;font-size:12px;font-weight:700;letter-spacing:.04em;
  color:var(--cyan);border:1px solid rgba(34,224,200,.45);
  background:rgba(34,224,200,.08);margin-bottom:18px;
}
.badge-cat i{font-size:11px}
.article-title{
  font-size:clamp(26px,3.4vw,40px);
  font-weight:800;line-height:1.28;letter-spacing:-.01em;
  color:var(--t1);max-width:900px;margin-bottom:22px;
  overflow-wrap:break-word;
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 22px;
  font-size:13.5px;color:var(--t3);
}
.article-meta .meta-item{display:inline-flex;align-items:center;gap:7px}
.article-meta .meta-item i{color:var(--cyan);font-size:12px}
.article-meta .num{font-family:var(--mono);font-variant-numeric:tabular-nums;color:var(--t2);
  border-bottom:1px solid rgba(34,224,200,.3);padding-bottom:1px}
.meta-dot{width:4px;height:4px;border-radius:50%;background:rgba(120,160,255,.4)}

/* ---------- 正文布局 ---------- */
.article-section{padding:48px 0 72px;position:relative;z-index:1}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr);gap:40px}
@media(min-width:1200px){
  .article-layout{grid-template-columns:minmax(0,1fr) 300px;gap:44px}
}
.article-main{min-width:0}
.glass-card{
  background:var(--glass);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  border:1px solid var(--glass-line);
  border-radius:var(--r-lg);
  box-shadow:var(--shadow);
  position:relative;
  overflow:hidden;
}
.glass-card::before{
  content:"";position:absolute;top:0;left:0;width:120px;height:1px;
  background:linear-gradient(90deg,rgba(34,224,200,.8),transparent);
}
.article-body{
  padding:38px 32px 42px;
  font-size:16.5px;line-height:1.9;color:var(--t2);
  overflow-wrap:break-word;
}
@media(max-width:575px){.article-body{padding:26px 20px 30px;font-size:16px}}
.article-body p{margin-bottom:20px}
.article-body h2{
  position:relative;font-size:26px;font-weight:700;color:var(--t1);
  margin:44px 0 18px;padding-left:16px;line-height:1.4;
  scroll-margin-top:96px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:3px;
  border-radius:3px;background:linear-gradient(180deg,var(--cyan),var(--primary));
  box-shadow:0 0 10px rgba(34,224,200,.55);
}
.article-body h2:first-child{margin-top:0}
.article-body h3{font-size:20px;font-weight:600;color:var(--t1);margin:32px 0 14px;scroll-margin-top:96px}
.article-body h4{font-size:17px;color:var(--t1);margin:24px 0 12px}
.article-body a{color:var(--cyan);border-bottom:1px solid rgba(34,224,200,.35)}
.article-body a:hover{border-bottom-color:var(--cyan)}
.article-body ul,.article-body ol{padding-left:24px;margin-bottom:22px}
.article-body li{margin-bottom:10px}
.article-body li::marker{color:var(--cyan)}
.article-body blockquote{
  margin:26px 0;padding:18px 22px;
  border-left:3px solid var(--cyan);
  background:rgba(14,22,48,.62);
  border-radius:0 var(--r-md) var(--r-md) 0;
  color:var(--t1);font-size:16px;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:14px;margin:24px auto;box-shadow:var(--shadow)}
.article-body figure{margin:26px 0}
.article-body figcaption{
  text-align:center;font-size:13px;color:var(--t3);margin-top:10px;
}
.article-body table{
  width:100%;border-collapse:collapse;font-size:15px;
  margin:26px 0;background:rgba(10,17,40,.7);
  border-radius:var(--r-md);overflow:hidden;
}
.article-body .table-wrap{overflow-x:auto;border:1px solid var(--glass-line);border-radius:var(--r-md);margin:26px 0}
.article-body .table-wrap table{margin:0;background:transparent}
.article-body th{
  background:var(--bg-mid);color:var(--t1);font-weight:700;
  text-align:left;padding:12px 16px;border-bottom:1px solid var(--line);white-space:nowrap;
}
.article-body td{padding:11px 16px;border-bottom:1px solid rgba(120,160,255,.09);color:var(--t2)}
.article-body tr:last-child td{border-bottom:0}
.article-body code{
  font-family:var(--mono);font-size:14px;
  background:rgba(46,107,255,.16);color:#B9D0FF;
  padding:2px 7px;border-radius:6px;
}
.article-body pre{
  background:rgba(5,9,20,.85);border:1px solid var(--glass-line);
  border-radius:var(--r-md);padding:18px 20px;overflow-x:auto;margin:24px 0;
}
.article-body pre code{background:transparent;padding:0;color:#C6D6FF;font-size:14px}
.article-body hr{border:0;height:1px;background:var(--line);margin:34px 0}

/* ---------- 空态 ---------- */
.empty-state{
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:14px;min-height:240px;padding:40px 20px;text-align:center;
}
.empty-state i{font-size:34px;color:var(--cyan);opacity:.85}
.empty-state p{margin:0;color:var(--t2);font-size:16px}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 24px;border-radius:var(--r-md);
  border:1px solid rgba(34,224,200,.5);color:var(--cyan);
  font-size:15px;font-weight:600;background:transparent;
  transition:all .22s var(--ease);
}
.btn-ghost:hover{color:var(--cyan);background:rgba(34,224,200,.1);transform:translateY(-2px)}
.btn-solid{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 26px;border-radius:var(--r-md);
  background:var(--ember);color:#200C04;font-size:15px;font-weight:800;
  box-shadow:0 0 22px rgba(255,122,69,.3);
  transition:all .22s var(--ease);
}
.btn-solid:hover{color:#200C04;filter:brightness(1.08);transform:translateY(-2px);box-shadow:0 0 28px rgba(255,122,69,.5)}

/* ---------- 侧栏 ---------- */
.article-aside{min-width:0}
.aside-inner{position:static;display:flex;flex-direction:column;gap:22px}
@media(min-width:1200px){
  .aside-inner{position:sticky;top:96px}
}
.aside-card{
  background:rgba(14,22,48,.72);
  border:1px solid var(--glass-line);
  border-radius:var(--r-lg);padding:20px 20px 22px;
  box-shadow:var(--shadow);
}
.aside-card h4{
  font-size:14px;font-weight:700;color:var(--t1);letter-spacing:.05em;
  margin-bottom:14px;display:flex;align-items:center;gap:8px;
}
.aside-card h4 i{color:var(--cyan);font-size:13px}
.toc-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:2px}
.toc-list a{
  display:block;font-size:13.5px;color:var(--t2);line-height:1.55;
  padding:7px 10px;border-radius:8px;border-left:2px solid transparent;
  transition:all .2s var(--ease);
  overflow:hidden;text-overflow:ellipsis;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;
}
.toc-list a:hover{color:var(--t1);background:rgba(120,160,255,.09)}
.toc-list a.is-active{
  color:var(--cyan);background:rgba(34,224,200,.09);
  border-left-color:var(--cyan);font-weight:600;
}
.toc-list.level3{padding-left:12px}
.rel-mini{display:flex;flex-direction:column;gap:14px}
.rel-mini-item{display:flex;gap:12px;align-items:flex-start}
.rel-mini-item img{
  width:72px;height:72px;object-fit:cover;border-radius:10px;
  border:1px solid var(--glass-line);flex-shrink:0;
  transition:transform .28s var(--ease);
}
.rel-mini-item:hover img{transform:scale(1.05)}
.rel-mini-txt{min-width:0}
.rel-mini-txt a{
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;
  overflow:hidden;font-size:13.5px;color:var(--t1);line-height:1.5;font-weight:600;
}
.rel-mini-txt a:hover{color:var(--cyan)}
.rel-mini-txt span{
  display:block;margin-top:6px;font-size:12px;color:var(--t3);
  font-family:var(--mono);font-variant-numeric:tabular-nums;
}
.aside-btn{
  display:flex;align-items:center;justify-content:center;gap:8px;
  width:100%;height:44px;border-radius:var(--r-md);
  border:1px solid rgba(34,224,200,.45);color:var(--cyan);
  font-size:14.5px;font-weight:600;margin-top:4px;
  transition:all .22s var(--ease);
}
.aside-btn:hover{background:rgba(34,224,200,.1);color:var(--cyan);transform:translateY(-2px)}

/* ---------- 相关推荐 ---------- */
.related-block{padding:8px 0 0}
.block-head{
  display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;
  gap:14px;margin-bottom:26px;
}
.block-head h2{
  font-size:clamp(21px,2.4vw,27px);font-weight:800;color:var(--t1);
  display:flex;align-items:center;gap:12px;
}
.block-head h2::before{
  content:"";width:4px;height:22px;border-radius:3px;
  background:linear-gradient(180deg,var(--cyan),var(--primary));
  box-shadow:0 0 12px rgba(34,224,200,.6);
}
.block-head p{margin:0;font-size:14px;color:var(--t3)}
.related-grid{display:grid;grid-template-columns:1fr;gap:20px}
@media(min-width:768px){.related-grid{grid-template-columns:repeat(3,1fr)}}
.rel-card{
  display:flex;flex-direction:column;
  background:var(--glass);border:1px solid var(--glass-line);
  border-radius:var(--r-lg);overflow:hidden;
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  box-shadow:var(--shadow);
  transition:transform .28s var(--ease),border-color .28s var(--ease),box-shadow .28s var(--ease);
}
.rel-card:hover{
  transform:translateY(-4px);
  border-color:rgba(34,224,200,.55);
  box-shadow:0 14px 36px rgba(0,0,0,.55),0 0 20px rgba(34,224,200,.14);
}
.rel-card .thumb{
  position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--bg-mid);
}
.rel-card .thumb img{
  width:100%;height:100%;object-fit:cover;
  transition:transform .4s var(--ease);filter:saturate(.95) brightness(.92);
}
.rel-card:hover .thumb img{transform:scale(1.04);filter:saturate(1.05) brightness(1)}
.rel-card .thumb::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(5,9,20,0) 40%,rgba(5,9,20,.75) 100%);
}
.rel-card .body{padding:18px 18px 20px}
.rel-card h3{
  font-size:16px;font-weight:700;color:var(--t1);line-height:1.5;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  margin-bottom:10px;
}
.rel-card p{
  font-size:13.5px;color:var(--t3);line-height:1.65;margin:0 0 12px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.rel-card .time{
  font-size:12.5px;color:var(--t3);font-family:var(--mono);
  font-variant-numeric:tabular-nums;display:flex;align-items:center;gap:6px;
}
.rel-card .time i{color:var(--cyan);font-size:11px}

/* ---------- 上一篇 / 下一篇 ---------- */
.post-nav{display:grid;grid-template-columns:1fr;gap:16px;margin-top:34px}
@media(min-width:768px){.post-nav{grid-template-columns:1fr 1fr}}
.post-nav a{
  display:flex;flex-direction:column;gap:8px;
  padding:20px 22px;border-radius:var(--r-lg);
  background:rgba(14,22,48,.7);border:1px solid var(--glass-line);
  transition:all .25s var(--ease);
}
.post-nav a:hover{
  border-color:rgba(34,224,200,.5);transform:translateY(-3px);
  box-shadow:0 12px 30px rgba(0,0,0,.5);
}
.post-nav .pn-label{
  font-size:12px;letter-spacing:.1em;color:var(--cyan);font-weight:700;
  display:flex;align-items:center;gap:7px;
}
.post-nav .pn-title{
  font-size:15px;color:var(--t1);font-weight:600;line-height:1.55;
  display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden;
}
.post-nav .next{align-items:flex-start;text-align:left}

/* ---------- 转化条 ---------- */
.cta-band{padding:56px 0 72px}
.cta-inner{
  position:relative;overflow:hidden;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:24px;padding:36px 34px;border-radius:22px;
  background:
    radial-gradient(520px 260px at 90% 20%,rgba(34,224,200,.16),transparent 70%),
    linear-gradient(120deg,rgba(46,107,255,.18),rgba(14,22,48,.9));
  border:1px solid rgba(120,160,255,.22);
  box-shadow:var(--shadow);
}
.cta-inner::after{
  content:"";position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(120,160,255,.06) 1px,transparent 1px),
    linear-gradient(90deg,rgba(120,160,255,.06) 1px,transparent 1px);
  background-size:40px 40px;opacity:.5;pointer-events:none;
}
.cta-text{position:relative;z-index:1;max-width:640px}
.cta-text h2{font-size:clamp(21px,2.6vw,28px);font-weight:800;margin-bottom:10px}
.cta-text p{margin:0;font-size:15px;color:var(--t2)}
.cta-inner .btn-solid{position:relative;z-index:1}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;z-index:1;
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(10,17,40,.9),rgba(5,9,20,1));
  padding:60px 0 26px;
}
.footer-grid{
  display:grid;grid-template-columns:1fr;gap:34px;
}
@media(min-width:768px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr}}
.footer-brand .brand{margin-bottom:16px}
.footer-brand p{
  font-size:14px;color:var(--t3);line-height:1.8;margin:0 0 16px;max-width:340px;
}
.footer-note{display:flex;flex-wrap:wrap;gap:8px}
.footer-note span{
  font-size:12px;color:var(--t2);padding:4px 11px;border-radius:999px;
  border:1px solid var(--glass-line);background:rgba(18,28,58,.6);
}
.footer-col h4{
  font-size:14px;font-weight:700;color:var(--t1);letter-spacing:.06em;margin-bottom:16px;
}
.footer-col ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px}
.footer-col a{font-size:14px;color:var(--t3)}
.footer-col a:hover{color:var(--cyan)}
.footer-col .footer-note{margin-top:16px}
.footer-bottom{
  margin-top:42px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  font-size:12.5px;color:var(--t3);
}
.footer-bottom .tech{font-family:var(--mono);letter-spacing:.02em}

/* ---------- 返回顶部 ---------- */
.back-top{
  position:fixed;right:20px;bottom:24px;width:46px;height:46px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:rgba(18,28,58,.85);border:1px solid var(--glass-line);
  color:var(--cyan);font-size:15px;cursor:pointer;z-index:1000;
  opacity:0;visibility:hidden;transform:translateY(12px);
  backdrop-filter:blur(12px);
  transition:all .28s var(--ease);
}
.back-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.back-top:hover{border-color:var(--cyan);box-shadow:0 0 20px rgba(34,224,200,.3)}

/* ---------- 焦点可访问 ---------- */
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{
  outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px;
}

/* ---------- 移动端 ---------- */
@media(max-width:991px){
  .nav-search{display:none}
  .nav-menu{
    position:fixed;top:0;right:0;bottom:0;width:min(320px,86vw);
    flex-direction:column;align-items:stretch;gap:6px;
    padding:88px 22px 26px;margin:0;
    background:rgba(8,14,32,.97);
    backdrop-filter:blur(18px);
    border-left:1px solid var(--glass-line);
    transform:translateX(105%);
    transition:transform .32s var(--ease);
    z-index:1150;overflow-y:auto;
  }
  .nav-menu.is-open{transform:translateX(0)}
  .nav-menu a{font-size:16.5px;padding:13px 14px;border-radius:10px;background:rgba(18,28,58,.5)}
  .nav-menu a::after{display:none}
  .nav-menu a.active{background:rgba(34,224,200,.12);color:var(--cyan)}
  .nav-toggle{display:flex;align-items:center;justify-content:center;z-index:1160}
  .btn-cta{display:none}
}
@media(max-width:767px){
  .article-hero{padding:36px 0 26px}
  .article-section{padding:34px 0 52px}
  .cta-inner{padding:26px 22px}
  .site-footer{padding:46px 0 22px}
  .back-top{right:14px;bottom:16px;width:42px;height:42px}
}
@media(prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
}

/* roulang page: category1 */
:root{
  --bg-deep:#050914;
  --bg-mid:#0A1128;
  --bg-card:#0E1630;
  --glass:rgba(18,28,58,.55);
  --glass-soft:rgba(18,28,58,.38);
  --line:rgba(120,160,255,.16);
  --line-soft:rgba(120,160,255,.1);
  --primary:#2E6BFF;
  --cyan:#22E0C8;
  --ember:#FF7A45;
  --t1:#F2F5FF;
  --t2:#A9B6D6;
  --t3:#6B7BA3;
  --r-lg:18px;
  --r-md:12px;
  --r-sm:10px;
  --shadow:0 8px 30px rgba(0,0,0,.45);
  --shadow-lg:0 18px 48px rgba(0,0,0,.55);
  --ease:cubic-bezier(.2,.7,.3,1);
  --mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg-deep);
  color:var(--t2);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:
    linear-gradient(rgba(120,160,255,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(120,160,255,.05) 1px,transparent 1px);
  background-size:48px 48px;
  opacity:.55;
}
img{max-width:100%;display:block;border:0}
a{color:var(--cyan);text-decoration:none;transition:color .22s var(--ease)}
a:hover{color:#5df0dd}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px}
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:32px;
  padding-right:32px;
  position:relative;
  z-index:1;
}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* ============ 导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:1000;
  background:rgba(5,9,20,.72);
  backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  border-bottom:1px solid var(--line);
  transition:background .25s var(--ease),box-shadow .25s var(--ease),border-color .25s var(--ease);
}
.site-header.is-stuck{
  background:rgba(5,9,20,.9);
  border-bottom-color:rgba(34,224,200,.35);
  box-shadow:0 10px 34px rgba(0,0,0,.55);
}
.nav-wrap{
  display:flex;
  align-items:center;
  gap:26px;
  height:72px;
  transition:height .25s var(--ease);
}
.site-header.is-stuck .nav-wrap{height:64px}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  text-decoration:none;
  flex-shrink:0;
}
.brand-mark{
  width:38px;height:38px;
  display:grid;place-items:center;
  border-radius:12px;
  background:linear-gradient(145deg,#2E6BFF,#22E0C8);
  color:#04101f;
  font-size:15px;
  box-shadow:0 0 20px rgba(46,107,255,.42);
}
.brand-text{display:block;line-height:1.15}
.brand-name{
  display:block;
  font-size:17px;
  font-weight:800;
  letter-spacing:.02em;
  color:var(--t1);
}
.brand-sub{
  display:block;
  font-size:10px;
  letter-spacing:.12em;
  color:var(--cyan);
  opacity:.9;
  font-weight:500;
}
.nav-menu{display:flex;align-items:center;gap:26px;margin-left:6px}
.nav-menu a{
  position:relative;
  display:inline-block;
  padding:6px 0;
  font-size:15px;
  font-weight:500;
  color:var(--t2);
  text-decoration:none;
  transition:color .22s var(--ease);
}
.nav-menu a::after{
  content:"";
  position:absolute;
  left:0;bottom:0;
  height:2px;width:0;
  border-radius:2px;
  background:var(--cyan);
  box-shadow:0 0 10px rgba(34,224,200,.8);
  transition:width .25s var(--ease);
}
.nav-menu a:hover{color:var(--t1)}
.nav-menu a:hover::after{width:100%}
.nav-menu a.active{color:var(--t1);font-weight:600}
.nav-menu a.active::after{width:100%}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:14px}
.nav-search{
  display:flex;
  align-items:center;
  gap:8px;
  padding:6px 14px;
  border-radius:999px;
  background:var(--glass);
  border:1px solid var(--line);
  transition:border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.nav-search i{font-size:12px;color:var(--cyan)}
.nav-search input{
  width:158px;
  border:0;outline:none;
  background:transparent;
  color:var(--t1);
  font-size:13px;
  line-height:1.6;
}
.nav-search input::placeholder{color:var(--t3)}
.nav-search:focus-within{border-color:var(--cyan);box-shadow:0 0 0 3px rgba(34,224,200,.12)}
.btn-cta{
  display:inline-flex;
  align-items:center;
  gap:8px;
  height:42px;
  padding:0 20px;
  border:0;
  border-radius:999px;
  background:var(--ember);
  color:#180a03;
  font-size:14px;
  font-weight:700;
  text-decoration:none;
  white-space:nowrap;
  box-shadow:0 0 20px rgba(255,122,69,.28);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),background .22s var(--ease);
}
.btn-cta:hover{
  background:#ff8f60;
  color:#180a03;
  transform:translateY(-2px);
  box-shadow:0 0 30px rgba(255,122,69,.46);
}
.btn-cta:active{transform:translateY(1px)}
.nav-toggle{
  display:none;
  width:42px;height:42px;
  border-radius:12px;
  border:1px solid var(--line);
  background:var(--glass);
  color:var(--t1);
  font-size:15px;
  place-items:center;
  cursor:pointer;
  transition:border-color .22s var(--ease),color .22s var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan)}

/* ============ 通用板块 ============ */
.section{padding:72px 0;position:relative}
.section-head{max-width:760px;margin-bottom:36px}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:5px 14px;
  margin-bottom:16px;
  border-radius:999px;
  border:1px solid rgba(34,224,200,.4);
  color:var(--cyan);
  font-size:12px;
  font-weight:600;
  letter-spacing:.08em;
}
.eyebrow i{font-size:11px}
.section-head h2{
  font-size:clamp(24px,2.6vw,32px);
  font-weight:700;
  color:var(--t1);
  line-height:1.28;
  letter-spacing:-.01em;
  margin-bottom:12px;
}
.section-head p{font-size:16px;color:var(--t2);line-height:1.85}

/* ============ 面包屑 ============ */
.crumbs{padding:26px 0 0}
.crumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--t3)}
.crumbs li{display:flex;align-items:center;gap:8px}
.crumbs li::after{content:"/";color:rgba(107,123,163,.6)}
.crumbs li:last-child::after{display:none}
.crumbs a{color:var(--t3);text-decoration:none}
.crumbs a:hover{color:var(--cyan)}
.crumbs .current{color:var(--t2)}

/* ============ Hero ============ */
.hero{
  position:relative;
  padding:40px 0 64px;
  overflow:hidden;
}
.hero::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:url('/assets/images/backpic/back-1.webp');
  background-size:cover;
  background-position:center right;
  opacity:.34;
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.95),rgba(0,0,0,.45) 62%,transparent 100%);
  mask-image:linear-gradient(180deg,rgba(0,0,0,.95),rgba(0,0,0,.45) 62%,transparent 100%);
  z-index:0;
}
.hero::after{
  content:"";
  position:absolute;
  top:-120px;right:-80px;
  width:520px;height:520px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(34,224,200,.22),rgba(34,224,200,0) 68%);
  filter:blur(60px);
  pointer-events:none;
  z-index:0;
}
.hero .container{position:relative;z-index:1}
.hero-inner{max-width:800px}
.hero h1{
  font-size:clamp(30px,4vw,50px);
  font-weight:800;
  line-height:1.16;
  letter-spacing:-.01em;
  color:var(--t1);
  margin:0 0 20px;
}
.hero h1 .accent{
  background:linear-gradient(120deg,#22E0C8,#2E6BFF);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.hero-lead{
  font-size:17px;
  line-height:1.9;
  color:var(--t2);
  max-width:690px;
  margin-bottom:28px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;align-items:center;margin-bottom:26px}
.btn-primary-solid{
  display:inline-flex;
  align-items:center;
  gap:10px;
  height:48px;
  padding:0 28px;
  border-radius:999px;
  background:var(--ember);
  color:#180a03;
  font-size:15px;
  font-weight:700;
  text-decoration:none;
  box-shadow:0 0 24px rgba(255,122,69,.3);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),background .22s var(--ease);
}
.btn-primary-solid:hover{
  background:#ff8f60;
  color:#180a03;
  transform:translateY(-2px);
  box-shadow:0 0 34px rgba(255,122,69,.5);
}
.btn-primary-solid:active{transform:translateY(1px)}
.btn-ghost{
  display:inline-flex;
  align-items:center;
  gap:10px;
  height:48px;
  padding:0 26px;
  border-radius:999px;
  background:transparent;
  border:1px solid rgba(34,224,200,.55);
  color:var(--cyan);
  font-size:15px;
  font-weight:600;
  text-decoration:none;
  transition:background .22s var(--ease),transform .22s var(--ease),border-color .22s var(--ease);
}
.btn-ghost:hover{
  background:rgba(34,224,200,.09);
  border-color:var(--cyan);
  color:var(--cyan);
  transform:translateY(-2px);
}
.btn-ghost:active{transform:translateY(1px)}
.hero-trust{display:flex;flex-wrap:wrap;gap:12px 26px;font-size:13px;color:var(--t3)}
.hero-trust span{display:inline-flex;align-items:center;gap:8px}
.hero-trust i{color:var(--cyan);font-size:12px}

/* 数据标签条 */
.meta-strip{
  display:flex;
  flex-wrap:wrap;
  gap:0;
  margin-top:34px;
  border-radius:var(--r-lg);
  background:var(--glass);
  border:1px solid var(--line);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  overflow:hidden;
  max-width:860px;
}
.meta-strip .item{
  flex:1 1 180px;
  padding:18px 24px;
  border-left:1px solid var(--line-soft);
}
.meta-strip .item:first-child{border-left:0}
.meta-strip .num{
  display:block;
  font-family:var(--mono);
  font-variant-numeric:tabular-nums;
  font-size:22px;
  font-weight:700;
  color:var(--cyan);
  line-height:1.3;
  text-shadow:0 0 18px rgba(34,224,200,.35);
}
.meta-strip .label{display:block;font-size:13px;color:var(--t3);margin-top:2px}

/* ============ 两栏布局 ============ */
.layout-2col{
  display:grid;
  grid-template-columns:minmax(0,1fr) 358px;
  gap:32px;
  align-items:start;
}

/* 步骤卡 */
.step-list{display:flex;flex-direction:column;gap:16px;counter-reset:step}
.step-card{
  position:relative;
  display:grid;
  grid-template-columns:56px minmax(0,1fr);
  gap:18px;
  padding:26px 26px 24px;
  border-radius:var(--r-lg);
  background:var(--glass);
  border:1px solid var(--line);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  box-shadow:var(--shadow);
  transition:transform .28s var(--ease),border-color .28s var(--ease),box-shadow .28s var(--ease);
}
.step-card::before{
  content:"";
  position:absolute;
  top:0;left:22px;right:22px;
  height:1px;
  background:linear-gradient(90deg,rgba(34,224,200,.65),rgba(46,107,255,.12) 55%,transparent);
  border-radius:2px;
}
.step-card:hover{
  transform:translateY(-4px);
  border-color:rgba(34,224,200,.5);
  box-shadow:var(--shadow-lg);
}
.step-num{
  width:56px;height:56px;
  display:grid;place-items:center;
  border-radius:14px;
  background:linear-gradient(140deg,#22E0C8,#2E6BFF);
  color:#03161a;
  font-family:var(--mono);
  font-variant-numeric:tabular-nums;
  font-size:20px;
  font-weight:800;
  box-shadow:0 0 24px rgba(34,224,200,.34);
}
.step-body h3{
  font-size:20px;
  font-weight:700;
  color:var(--t1);
  line-height:1.4;
  margin-bottom:10px;
}
.step-body p{font-size:15.5px;color:var(--t2);line-height:1.85;margin-bottom:12px}
.step-points{display:flex;flex-direction:column;gap:8px}
.step-points li{
  position:relative;
  padding-left:20px;
  font-size:14px;
  color:var(--t3);
  line-height:1.75;
}
.step-points li::before{
  content:"";
  position:absolute;
  left:2px;top:10px;
  width:6px;height:6px;
  border-radius:50%;
  background:var(--cyan);
  box-shadow:0 0 8px rgba(34,224,200,.8);
}
.step-tip{
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin-top:14px;
  padding:6px 14px;
  border-radius:999px;
  font-size:12px;
  color:var(--ember);
  border:1px solid rgba(255,122,69,.4);
  background:rgba(255,122,69,.07);
}
.step-tip i{font-size:11px}

/* 侧栏快捷卡 */
.aside-card{
  position:sticky;
  top:96px;
  padding:26px;
  border-radius:var(--r-lg);
  background:var(--glass);
  border:1px solid var(--line);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  box-shadow:var(--shadow);
}
.aside-card h3{
  font-size:18px;
  font-weight:700;
  color:var(--t1);
  margin-bottom:10px;
  line-height:1.4;
}
.aside-card > p{font-size:14px;color:var(--t3);line-height:1.8;margin-bottom:18px}
.aside-figure{
  border-radius:14px;
  overflow:hidden;
  margin-bottom:18px;
  border:1px solid var(--line);
  background:var(--bg-mid);
}
.aside-figure img{
  width:100%;
  aspect-ratio:16/9;
  object-fit:cover;
  object-position:center 30%;
  filter:saturate(105%) brightness(.92);
  transition:transform .35s var(--ease);
}
.aside-card:hover .aside-figure img{transform:scale(1.03)}
.aside-list{display:flex;flex-direction:column;gap:12px;margin-bottom:22px}
.aside-list li{
  display:flex;
  gap:10px;
  align-items:flex-start;
  font-size:14px;
  color:var(--t2);
  line-height:1.7;
}
.aside-list i{color:var(--cyan);font-size:12px;margin-top:7px;flex-shrink:0}
.aside-card .btn-primary-solid{width:100%;justify-content:center;margin-bottom:12px}
.aside-link{
  display:flex;
  align-items:center;
  justify-content:space-between;
  font-size:14px;
  color:var(--cyan);
  padding:10px 0;
  border-top:1px solid var(--line-soft);
}
.aside-link i{transition:transform .22s var(--ease)}
.aside-link:hover i{transform:translateX(3px)}

/* ============ 适用场景 ============ */
.scene-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:20px;
}
.scene-card{
  padding:28px 24px;
  border-radius:var(--r-lg);
  background:var(--glass-soft);
  border:1px solid var(--line);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  transition:transform .28s var(--ease),border-color .28s var(--ease),background .28s var(--ease);
}
.scene-card:hover{
  transform:translateY(-4px);
  border-color:rgba(34,224,200,.45);
  background:rgba(18,28,58,.62);
}
.scene-icon{
  width:46px;height:46px;
  display:grid;place-items:center;
  border-radius:12px;
  margin-bottom:18px;
  background:rgba(46,107,255,.16);
  border:1px solid rgba(46,107,255,.35);
  color:var(--cyan);
  font-size:17px;
}
.scene-card h3{
  font-size:18px;
  font-weight:700;
  color:var(--t1);
  margin-bottom:10px;
  line-height:1.4;
}
.scene-card p{font-size:14.5px;color:var(--t2);line-height:1.85}

/* ============ 保障条 ============ */
.guard-bar{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  border-radius:var(--r-lg);
  background:var(--glass);
  border:1px solid var(--line);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  overflow:hidden;
}
.guard-item{
  padding:26px 22px;
  border-left:1px solid var(--line-soft);
  transition:background .25s var(--ease);
}
.guard-item:first-child{border-left:0}
.guard-item:hover{background:rgba(34,224,200,.06)}
.guard-item i{
  display:block;
  font-size:18px;
  color:var(--cyan);
  margin-bottom:12px;
}
.guard-item h4{
  font-size:15px;
  font-weight:700;
  color:var(--t1);
  margin-bottom:6px;
}
.guard-item p{font-size:13px;color:var(--t3);line-height:1.75}

/* ============ FAQ ============ */
.faq-wrap{max-width:900px}
.faq .accordion-item{
  margin-bottom:12px;
  border:1px solid var(--line);
  border-radius:14px !important;
  background:var(--glass);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  overflow:hidden;
  transition:border-color .25s var(--ease);
}
.faq .accordion-item:hover{border-color:rgba(120,160,255,.32)}
.faq .accordion-button{
  display:flex;
  align-items:center;
  gap:14px;
  width:100%;
  padding:20px 22px;
  background:transparent;
  border:0;
  border-left:3px solid transparent;
  color:var(--t1);
  font-size:16px;
  font-weight:600;
  line-height:1.6;
  text-align:left;
  box-shadow:none;
  transition:color .25s var(--ease),background .25s var(--ease),border-color .25s var(--ease);
}
.faq .accordion-button:focus{box-shadow:none;outline:2px solid var(--cyan);outline-offset:-3px}
.faq .accordion-button:not(.collapsed){
  color:var(--cyan);
  background:rgba(34,224,200,.06);
  border-left-color:var(--cyan);
}
.faq .accordion-button::after{
  content:"\f078";
  font-family:"Font Awesome 6 Free";
  font-weight:900;
  font-size:11px;
  color:var(--cyan);
  background-image:none;
  width:26px;height:26px;
  flex:0 0 26px;
  margin-left:auto;
  display:grid;
  place-items:center;
  border-radius:50%;
  border:1px solid rgba(34,224,200,.35);
  transform:none;
  transition:transform .3s var(--ease),background .25s var(--ease);
}
.faq .accordion-button:not(.collapsed)::after{
  transform:rotate(180deg);
  background:rgba(34,224,200,.12);
}
.faq .accordion-body{
  padding:0 22px 22px 25px;
  font-size:15px;
  color:var(--t2);
  line-height:1.9;
  border-left:3px solid rgba(34,224,200,.22);
}
.faq .accordion-body strong{color:var(--t1);font-weight:600}

/* ============ CTA ============ */
.cta-band{
  position:relative;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  padding:44px 48px;
  border-radius:24px;
  overflow:hidden;
  background:linear-gradient(120deg,rgba(46,107,255,.2),rgba(34,224,200,.1) 60%,rgba(14,22,48,.9)),var(--bg-card);
  border:1px solid var(--line);
  box-shadow:var(--shadow-lg);
}
.cta-band::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:
    linear-gradient(rgba(120,160,255,.06) 1px,transparent 1px),
    linear-gradient(90deg,rgba(120,160,255,.06) 1px,transparent 1px);
  background-size:40px 40px;
  pointer-events:none;
}
.cta-band::after{
  content:"";
  position:absolute;
  right:-110px;top:-110px;
  width:380px;height:380px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(34,224,200,.26),transparent 68%);
  filter:blur(50px);
  pointer-events:none;
}
.cta-text{position:relative;z-index:1;max-width:640px}
.cta-text h2{
  font-size:clamp(22px,2.4vw,30px);
  font-weight:800;
  color:var(--t1);
  line-height:1.3;
  margin-bottom:12px;
  letter-spacing:-.01em;
}
.cta-text p{font-size:15.5px;color:var(--t2);line-height:1.85}
.cta-band .btn-primary-solid{position:relative;z-index:1;flex-shrink:0}

/* ============ 页脚 ============ */
.site-footer{
  position:relative;
  margin-top:8px;
  background:var(--bg-mid);
  border-top:1px solid var(--line);
  z-index:1;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1fr;
  gap:36px;
  padding:60px 0 36px;
}
.footer-brand .brand{margin-bottom:18px}
.footer-brand p{
  font-size:14px;
  color:var(--t3);
  line-height:1.9;
  max-width:360px;
}
.footer-note{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.footer-note span{
  padding:4px 12px;
  border-radius:999px;
  border:1px solid var(--line);
  color:var(--t3);
  font-size:12px;
}
.footer-col h4{
  font-size:15px;
  font-weight:700;
  color:var(--t1);
  margin-bottom:16px;
  letter-spacing:.02em;
}
.footer-col ul{display:flex;flex-direction:column;gap:11px}
.footer-col a{
  font-size:14px;
  color:var(--t3);
  text-decoration:none;
  transition:color .22s var(--ease),padding-left .22s var(--ease);
}
.footer-col a:hover{color:var(--cyan);padding-left:3px}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  gap:10px 24px;
  justify-content:space-between;
  align-items:center;
  padding:22px 0 28px;
  border-top:1px solid var(--line-soft);
  font-size:13px;
  color:var(--t3);
}

/* 返回顶部 */
.to-top{
  position:fixed;
  right:24px;bottom:24px;
  width:46px;height:46px;
  display:grid;place-items:center;
  border-radius:50%;
  border:1px solid var(--line);
  background:rgba(18,28,58,.82);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  color:var(--cyan);
  font-size:15px;
  cursor:pointer;
  opacity:0;
  visibility:hidden;
  transform:translateY(10px);
  transition:opacity .3s var(--ease),transform .3s var(--ease),visibility .3s,border-color .3s;
  z-index:900;
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{border-color:var(--cyan);box-shadow:0 0 22px rgba(34,224,200,.3)}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .nav-search input{width:120px}
  .nav-menu{gap:20px}
  .layout-2col{grid-template-columns:minmax(0,1fr) 320px;gap:26px}
}
@media (max-width:991px){
  .nav-menu{
    position:fixed;
    top:72px;left:0;right:0;bottom:0;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    margin:0;
    padding:14px 24px 32px;
    background:rgba(5,9,20,.97);
    backdrop-filter:blur(18px);
    -webkit-backdrop-filter:blur(18px);
    border-top:1px solid var(--line);
    transform:translateX(102%);
    transition:transform .35s var(--ease);
    overflow-y:auto;
    z-index:1001;
  }
  .nav-menu.is-open{transform:translateX(0)}
  .nav-menu a{
    font-size:19px;
    font-weight:600;
    padding:16px 0;
    border-bottom:1px solid var(--line-soft);
  }
  .nav-menu a::after{display:none}
  .nav-menu a.active{color:var(--cyan)}
  .nav-search{display:none}
  .nav-toggle{display:grid}
  .site-header.is-stuck .nav-wrap{height:72px}
  .layout-2col{grid-template-columns:minmax(0,1fr)}
  .aside-card{position:static}
  .scene-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .guard-bar{grid-template-columns:repeat(2,minmax(0,1fr))}
  .guard-item:nth-child(odd){border-left:0}
  .guard-item:nth-child(n+3){border-top:1px solid var(--line-soft)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;padding:48px 0 28px}
  .cta-band{flex-direction:column;align-items:flex-start;padding:36px 32px}
  .section{padding:56px 0}
}
@media (max-width:767px){
  .container{padding-left:20px;padding-right:20px}
  .nav-wrap{gap:12px}
  .brand-name{font-size:15px}
  .brand-mark{width:34px;height:34px;border-radius:10px;font-size:13px}
  .btn-cta{height:38px;padding:0 14px;font-size:13px}
  .hero{padding:24px 0 48px}
  .hero-lead{font-size:16px}
  .hero-actions{gap:12px}
  .btn-primary-solid,.btn-ghost{height:46px;padding:0 22px;font-size:14.5px}
  .meta-strip .item{flex:1 1 100%;border-left:0;border-top:1px solid var(--line-soft);padding:14px 20px}
  .meta-strip .item:first-child{border-top:0}
  .step-card{grid-template-columns:44px minmax(0,1fr);gap:14px;padding:22px 20px}
  .step-num{width:44px;height:44px;font-size:16px;border-radius:12px}
  .step-body h3{font-size:18px}
  .scene-grid{grid-template-columns:minmax(0,1fr)}
  .guard-bar{grid-template-columns:minmax(0,1fr)}
  .guard-item{border-left:0;border-top:1px solid var(--line-soft);padding:22px 20px}
  .guard-item:first-child{border-top:0}
  .cta-band{padding:30px 24px;border-radius:20px}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start;font-size:12.5px}
  .to-top{right:16px;bottom:16px;width:42px;height:42px}
}
@media (max-width:520px){
  .nav-right{gap:8px}
  .btn-cta{padding:0 12px;font-size:12.5px}
  .brand-sub{font-size:9px;letter-spacing:.08em}
  .hero h1{font-size:28px}
  .section-head h2{font-size:22px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
}

/* roulang page: category2 */
:root{
  --bg-deep:#050914;
  --bg-mid:#0A1128;
  --bg-card:#0E1630;
  --glass:rgba(18,28,58,.55);
  --line:rgba(120,160,255,.16);
  --line-soft:rgba(120,160,255,.14);
  --primary:#2E6BFF;
  --cyan:#22E0C8;
  --ember:#FF7A45;
  --t1:#F2F5FF;
  --t2:#A9B6D6;
  --t3:#6B7BA3;
  --r-lg:18px;
  --r-md:12px;
  --r-sm:10px;
  --shadow:0 8px 30px rgba(0,0,0,.45);
  --ease:cubic-bezier(.2,.7,.3,1);
  --maxw:1200px;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  background:var(--bg-deep);
  color:var(--t2);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background:
    radial-gradient(640px 420px at 8% -8%, rgba(46,107,255,.16), transparent 70%),
    radial-gradient(520px 380px at 96% 6%, rgba(34,224,200,.09), transparent 72%);
}
img{max-width:100%;display:block;}
a{color:var(--cyan);text-decoration:none;transition:color .22s var(--ease);}
a:hover{color:#6FF3E1;}
h1,h2,h3,h4,h5{color:var(--t1);margin:0;line-height:1.25;font-weight:700;letter-spacing:-.01em;}
p{margin:0 0 16px;}
ul{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px;}
.container{
  width:100%;
  max-width:var(--maxw);
  margin:0 auto;
  padding:0 20px;
  position:relative;
  z-index:1;
}
@media (min-width:768px){.container{padding:0 32px;}}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum";}

/* ============ Header ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:1000;
  background:rgba(5,9,20,.74);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  border-bottom:1px solid var(--line-soft);
  transition:background .25s var(--ease),box-shadow .25s var(--ease);
}
.site-header.is-stuck{
  background:rgba(5,9,20,.92);
  box-shadow:0 1px 0 rgba(34,224,200,.28),0 14px 34px rgba(0,0,0,.5);
}
.nav-wrap{display:flex;align-items:center;gap:22px;height:72px;}
.brand{display:flex;align-items:center;gap:11px;flex:0 0 auto;color:var(--t1);}
.brand:hover{color:var(--t1);}
.brand-mark{
  width:38px;height:38px;border-radius:11px;
  display:grid;place-items:center;
  background:linear-gradient(145deg,rgba(46,107,255,.9),rgba(34,224,200,.75));
  color:#04101F;font-size:16px;
  box-shadow:0 0 22px rgba(34,224,200,.32);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-name{font-size:17px;font-weight:800;letter-spacing:.02em;color:var(--t1);}
.brand-sub{font-size:10.5px;letter-spacing:.14em;color:var(--cyan);opacity:.9;}
.nav-menu{display:flex;align-items:center;gap:6px;margin-left:8px;}
.nav-menu a{
  position:relative;
  color:var(--t2);
  font-size:14.5px;
  padding:9px 12px;
  border-radius:9px;
  white-space:nowrap;
  transition:color .22s var(--ease),background .22s var(--ease);
}
.nav-menu a::after{
  content:"";
  position:absolute;
  left:12px;right:12px;bottom:3px;
  height:2px;border-radius:2px;
  background:var(--cyan);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .26s var(--ease);
}
.nav-menu a:hover{color:var(--t1);background:rgba(120,160,255,.07);}
.nav-menu a.active{color:var(--t1);font-weight:600;}
.nav-menu a.active::after{transform:scaleX(1);}
.nav-right{display:flex;align-items:center;gap:12px;margin-left:auto;}
.nav-search{
  display:flex;align-items:center;gap:8px;
  background:rgba(18,28,58,.62);
  border:1px solid var(--line);
  border-radius:11px;
  padding:0 12px;
  height:38px;
  width:210px;
  transition:border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.nav-search i{color:var(--cyan);font-size:13px;}
.nav-search input{
  background:transparent;border:0;outline:none;
  color:var(--t1);font-size:13.5px;width:100%;
}
.nav-search input::placeholder{color:var(--t3);}
.nav-search:focus-within{border-color:rgba(34,224,200,.55);box-shadow:0 0 0 3px rgba(34,224,200,.12);}
.btn-cta{
  display:inline-flex;align-items:center;justify-content:center;
  height:40px;padding:0 18px;border-radius:11px;
  background:linear-gradient(180deg,#FF8A5B,#FF7A45);
  color:#100A05;font-size:14px;font-weight:700;
  box-shadow:0 6px 20px rgba(255,122,69,.26);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),filter .22s var(--ease);
  white-space:nowrap;
}
.btn-cta:hover{color:#100A05;filter:brightness(1.08);transform:translateY(-2px);box-shadow:0 10px 26px rgba(255,122,69,.36);}
.btn-cta:active{transform:translateY(0);}
.nav-toggle{
  display:none;width:40px;height:40px;border-radius:11px;
  background:rgba(18,28,58,.7);border:1px solid var(--line);
  color:var(--t1);font-size:15px;
}
.nav-toggle:hover{border-color:rgba(34,224,200,.5);color:var(--cyan);}

/* ============ 通用组件 ============ */
.pill{
  display:inline-flex;align-items:center;gap:7px;
  font-size:12.5px;font-weight:600;
  padding:6px 14px;border-radius:999px;
  letter-spacing:.02em;
}
.pill-cyan{color:var(--cyan);border:1px solid rgba(34,224,200,.4);background:rgba(34,224,200,.08);}
.pill-ember{color:var(--ember);border:1px solid rgba(255,122,69,.42);background:rgba(255,122,69,.09);}
.btn-main{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  height:48px;padding:0 26px;border-radius:12px;
  background:linear-gradient(180deg,#FF8A5B,#FF7A45);
  color:#100A05;font-size:15.5px;font-weight:700;
  box-shadow:0 8px 30px rgba(0,0,0,.45),0 0 24px rgba(255,122,69,.28);
  transition:transform .22s var(--ease),filter .22s var(--ease),box-shadow .22s var(--ease);
}
.btn-main:hover{color:#100A05;filter:brightness(1.08);transform:translateY(-2px);box-shadow:0 12px 34px rgba(0,0,0,.5),0 0 30px rgba(255,122,69,.4);}
.btn-main:active{transform:translateY(0);}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  height:48px;padding:0 24px;border-radius:12px;
  border:1px solid rgba(34,224,200,.5);
  color:var(--cyan);font-size:15.5px;font-weight:600;
  background:transparent;
  transition:background .22s var(--ease),transform .22s var(--ease),border-color .22s var(--ease);
}
.btn-ghost:hover{background:rgba(34,224,200,.09);color:#7DF4E4;border-color:var(--cyan);transform:translateY(-2px);}
.btn-ghost:active{transform:translateY(0);}
.glass-card{
  position:relative;
  background:var(--glass);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--shadow);
  overflow:hidden;
  transition:transform .28s var(--ease),border-color .28s var(--ease),box-shadow .28s var(--ease);
}
.glass-card::before{
  content:"";
  position:absolute;top:0;left:0;
  width:64px;height:1px;
  background:linear-gradient(90deg,rgba(34,224,200,.85),transparent);
}
.glass-card:hover{transform:translateY(-4px);border-color:rgba(34,224,200,.45);box-shadow:0 14px 38px rgba(0,0,0,.5);}
.sec-head{margin-bottom:36px;max-width:760px;}
.sec-head h2{font-size:clamp(24px,2.6vw,32px);font-weight:700;margin-bottom:12px;}
.sec-head h2 span{color:var(--cyan);}
.sec-head p{margin:0;color:var(--t2);font-size:15.5px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;letter-spacing:.16em;color:var(--cyan);
  margin-bottom:14px;text-transform:uppercase;
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--cyan);opacity:.7;}
.section{padding:76px 0;position:relative;}
@media (max-width:767.98px){.section{padding:52px 0;}}

/* ============ Hero ============ */
.page-hero{
  position:relative;
  padding:44px 0 72px;
  overflow:hidden;
  border-bottom:1px solid var(--line-soft);
}
.page-hero::before{
  content:"";
  position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(120,160,255,.055) 1px,transparent 1px),
    linear-gradient(90deg,rgba(120,160,255,.055) 1px,transparent 1px);
  background-size:48px 48px;
  -webkit-mask-image:radial-gradient(circle at 28% 18%,#000,transparent 78%);
  mask-image:radial-gradient(circle at 28% 18%,#000,transparent 78%);
  pointer-events:none;
}
.page-hero::after{
  content:"";
  position:absolute;
  width:420px;height:420px;right:-120px;top:-160px;
  background:radial-gradient(circle,rgba(34,224,200,.16),transparent 68%);
  filter:blur(60px);
  pointer-events:none;
}
.crumb{
  display:flex;align-items:center;gap:9px;flex-wrap:wrap;
  font-size:13px;color:var(--t3);
  margin-bottom:28px;
}
.crumb a{color:var(--t3);}
.crumb a:hover{color:var(--cyan);}
.crumb i{font-size:10px;opacity:.6;}
.crumb span{color:var(--t2);}
.hero-grid{display:grid;grid-template-columns:1.06fr .94fr;gap:52px;align-items:center;}
.hero-copy h1{
  font-size:clamp(28px,3.6vw,44px);
  font-weight:800;
  line-height:1.2;
  letter-spacing:-.015em;
  margin:18px 0 18px;
}
.hero-copy h1 em{font-style:normal;color:var(--cyan);}
.hero-copy > p{font-size:16.5px;line-height:1.9;color:var(--t2);max-width:560px;margin-bottom:26px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:24px;}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;}
.hero-tags span{
  font-size:12.5px;color:var(--t2);
  border:1px solid var(--line);
  background:rgba(18,28,58,.5);
  padding:5px 12px;border-radius:999px;
}
.hero-media{position:relative;}
.hero-media img{
  width:100%;height:400px;object-fit:cover;
  border-radius:var(--r-lg);
  border:1px solid rgba(120,160,255,.22);
  filter:saturate(1.05) contrast(1.04);
}
.hero-media::after{
  content:"";
  position:absolute;inset:0;
  border-radius:var(--r-lg);
  background:linear-gradient(180deg,rgba(5,9,20,.05) 0%,rgba(5,9,20,.72) 100%);
  pointer-events:none;
}
.hero-float{
  position:absolute;left:20px;right:20px;bottom:18px;
  z-index:2;
  display:grid;grid-template-columns:repeat(3,1fr);
  gap:10px;
  background:rgba(10,17,40,.78);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border:1px solid rgba(120,160,255,.22);
  border-radius:14px;
  padding:14px 16px;
}
.hero-float div{text-align:center;}
.hero-float strong{
  display:block;
  font-size:22px;font-weight:800;color:var(--cyan);
  font-variant-numeric:tabular-nums;
  text-shadow:0 0 18px rgba(34,224,200,.4);
}
.hero-float small{font-size:11.5px;color:var(--t3);letter-spacing:.04em;}

/* ============ 概览条 ============ */
.overview-bar{
  display:grid;grid-template-columns:repeat(4,1fr);
  gap:0;
  border-radius:var(--r-lg);
  overflow:hidden;
}
.overview-bar .ov-item{
  padding:22px 24px;
  border-right:1px solid var(--line-soft);
  background:rgba(14,22,48,.55);
}
.overview-bar .ov-item:last-child{border-right:0;}
.ov-item strong{
  display:block;font-size:15px;color:var(--t1);font-weight:700;margin-bottom:4px;
}
.ov-item span{font-size:13px;color:var(--t3);}
.ov-item .ov-num{
  font-size:26px;color:var(--cyan);font-weight:800;
  font-variant-numeric:tabular-nums;
  line-height:1.2;margin-bottom:2px;
  text-shadow:0 0 20px rgba(34,224,200,.3);
}

/* ============ 专题卡网格 ============ */
.topic-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:26px;}
.topic-card{display:flex;flex-direction:column;}
.topic-cover{position:relative;overflow:hidden;aspect-ratio:16/9;}
.topic-cover img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease),filter .4s var(--ease);}
.topic-card:hover .topic-cover img{transform:scale(1.04);filter:brightness(1.06);}
.topic-cover::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,transparent 40%,rgba(5,9,20,.85) 100%);
}
.state-badge{
  position:absolute;top:14px;right:14px;z-index:2;
  display:inline-flex;align-items:center;gap:6px;
  font-size:11.5px;font-weight:700;letter-spacing:.04em;
  padding:5px 11px;border-radius:999px;
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
}
.state-live{background:rgba(255,122,69,.16);border:1px solid rgba(255,122,69,.55);color:#FFB093;}
.state-live i{font-size:8px;color:var(--ember);animation:pulse 1.8s infinite;}
.state-soon{background:rgba(34,224,200,.13);border:1px solid rgba(34,224,200,.45);color:#8BF2E4;}
.state-done{background:rgba(120,160,255,.12);border:1px solid rgba(120,160,255,.35);color:#A9C0FF;}
@keyframes pulse{0%,100%{opacity:1;}50%{opacity:.25;}}
.topic-body{padding:22px 24px 24px;display:flex;flex-direction:column;flex:1;}
.topic-body h3{font-size:19.5px;font-weight:700;margin-bottom:10px;}
.topic-body p{font-size:14.5px;color:var(--t2);line-height:1.8;margin-bottom:16px;}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:18px;}
.tag-row span{
  font-size:11.5px;color:var(--t2);
  border:1px solid var(--line);
  background:rgba(10,17,40,.6);
  padding:3px 10px;border-radius:999px;
}
.link-arrow{
  margin-top:auto;
  display:inline-flex;align-items:center;gap:8px;
  font-size:13.5px;font-weight:600;color:var(--cyan);
}
.link-arrow i{transition:transform .24s var(--ease);}
.link-arrow:hover i{transform:translateX(4px);}

/* ============ 赛程节奏 ============ */
.schedule-panel{padding:8px 6px;}
.sched-row{
  display:grid;
  grid-template-columns:96px 1fr 120px 110px;
  align-items:center;
  gap:16px;
  padding:18px 22px;
  border-bottom:1px solid var(--line-soft);
  transition:background .22s var(--ease);
}
.sched-row:last-child{border-bottom:0;}
.sched-row:hover{background:rgba(34,224,200,.045);}
.sched-date{
  font-size:15px;font-weight:700;color:var(--t1);
  font-variant-numeric:tabular-nums;
}
.sched-date small{display:block;font-size:11.5px;color:var(--t3);font-weight:400;letter-spacing:.06em;}
.sched-name{font-size:15px;color:var(--t1);font-weight:600;}
.sched-name span{display:block;font-size:12.5px;color:var(--t3);font-weight:400;margin-top:2px;}
.sched-time{font-size:14px;color:var(--cyan);font-variant-numeric:tabular-nums;}
.sched-state{
  font-size:12px;color:var(--t2);
  border:1px solid var(--line);
  border-radius:999px;
  padding:3px 10px;
  text-align:center;
  justify-self:end;
}

/* ============ 流程条 ============ */
.flow-card{padding:34px 30px;}
.flow-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;}
.flow-item{position:relative;padding-left:58px;}
.flow-num{
  position:absolute;left:0;top:2px;
  width:40px;height:40px;border-radius:12px;
  display:grid;place-items:center;
  font-size:15px;font-weight:800;
  color:var(--cyan);
  background:rgba(34,224,200,.1);
  border:1px solid rgba(34,224,200,.34);
  font-variant-numeric:tabular-nums;
  box-shadow:0 0 20px rgba(34,224,200,.16);
}
.flow-item h3{font-size:17px;margin-bottom:8px;}
.flow-item p{font-size:14px;color:var(--t2);margin:0;line-height:1.8;}

/* ============ FAQ ============ */
.faq-wrap{max-width:880px;margin:0 auto;}
.faq .accordion-item{
  background:transparent;
  border:0;
  margin-bottom:14px;
}
.faq .accordion-button{
  width:100%;
  background:rgba(18,28,58,.55);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border:1px solid var(--line);
  border-radius:14px !important;
  color:var(--t1);
  font-size:15.5px;
  font-weight:600;
  padding:18px 22px;
  box-shadow:none;
  transition:background .24s var(--ease),border-color .24s var(--ease),color .24s var(--ease);
}
.faq .accordion-button:not(.collapsed){
  background:rgba(34,224,200,.08);
  color:var(--cyan);
  border-color:rgba(34,224,200,.36);
  box-shadow:inset 3px 0 0 var(--cyan);
}
.faq .accordion-button:focus{box-shadow:inset 3px 0 0 var(--cyan),0 0 0 2px rgba(34,224,200,.3);}
.faq .accordion-button::after{
  content:"\f078";
  font-family:"Font Awesome 6 Free";
  font-weight:900;
  font-size:12px;
  background-image:none;
  width:auto;height:auto;
  display:grid;place-items:center;
  transform:none;
  transition:transform .26s var(--ease);
  color:inherit;
  margin-left:16px;
}
.faq .accordion-button:not(.collapsed)::after{transform:rotate(180deg);}
.faq .accordion-body{
  padding:16px 22px 6px;
  font-size:14.5px;
  line-height:1.9;
  color:var(--t2);
}
.faq .accordion-body p:last-child{margin-bottom:0;}

/* ============ CTA ============ */
.cta-band{
  position:relative;
  border-radius:22px;
  padding:44px 44px;
  background:
    radial-gradient(520px 260px at 8% 0%,rgba(46,107,255,.22),transparent 70%),
    linear-gradient(135deg,rgba(14,22,48,.95),rgba(10,17,40,.9));
  border:1px solid rgba(120,160,255,.22);
  overflow:hidden;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  box-shadow:var(--shadow);
}
.cta-band::before{
  content:"";
  position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(120,160,255,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(120,160,255,.05) 1px,transparent 1px);
  background-size:40px 40px;
  -webkit-mask-image:radial-gradient(circle at 20% 30%,#000,transparent 72%);
  mask-image:radial-gradient(circle at 20% 30%,#000,transparent 72%);
  pointer-events:none;
}
.cta-band > *{position:relative;z-index:1;}
.cta-band h2{font-size:clamp(22px,2.4vw,30px);margin-bottom:10px;}
.cta-band p{margin:0;color:var(--t2);font-size:15px;}

/* ============ Footer ============ */
.site-footer{
  margin-top:20px;
  border-top:1px solid var(--line-soft);
  background:linear-gradient(180deg,rgba(10,17,40,.7),rgba(5,9,20,1));
  padding:64px 0 26px;
  position:relative;
  z-index:1;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1fr;
  gap:40px;
  padding-bottom:44px;
  border-bottom:1px solid var(--line-soft);
}
.footer-brand .brand{margin-bottom:16px;}
.footer-brand .brand-name{font-size:16.5px;}
.footer-brand p{font-size:14px;color:var(--t2);line-height:1.85;max-width:330px;}
.footer-note{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px;}
.footer-note span{
  font-size:11.5px;color:var(--t3);
  border:1px solid var(--line);
  padding:3px 10px;border-radius:999px;
}
.footer-col h4{
  font-size:14px;color:var(--t1);font-weight:700;
  margin-bottom:16px;letter-spacing:.04em;
}
.footer-col ul li{margin-bottom:10px;}
.footer-col ul li a{
  font-size:13.5px;color:var(--t3);
  transition:color .22s var(--ease),padding-left .22s var(--ease);
}
.footer-col ul li a:hover{color:var(--cyan);padding-left:4px;}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:12px;
  justify-content:space-between;
  padding-top:22px;
  font-size:12.5px;
  color:var(--t3);
}

/* ============ 返回顶部 ============ */
.to-top{
  position:fixed;right:22px;bottom:26px;z-index:1200;
  width:46px;height:46px;border-radius:14px;
  display:grid;place-items:center;
  background:rgba(18,28,58,.85);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border:1px solid rgba(34,224,200,.32);
  color:var(--cyan);
  opacity:0;visibility:hidden;
  transform:translateY(10px);
  transition:opacity .28s var(--ease),transform .28s var(--ease),visibility .28s;
  cursor:pointer;
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{background:rgba(34,224,200,.14);}

/* ============ 响应式 ============ */
@media (max-width:1199.98px){
  .nav-search{width:170px;}
  .hero-grid{gap:36px;}
  .hero-media img{height:340px;}
}
@media (max-width:991.98px){
  .nav-toggle{display:grid;place-items:center;}
  .nav-menu{
    position:fixed;
    top:72px;left:0;right:0;bottom:0;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:24px 24px 40px;
    background:rgba(5,9,20,.97);
    -webkit-backdrop-filter:blur(18px);
    backdrop-filter:blur(18px);
    margin-left:0;
    opacity:0;visibility:hidden;
    transform:translateY(-10px);
    transition:opacity .26s var(--ease),transform .26s var(--ease),visibility .26s;
    overflow-y:auto;
    z-index:990;
  }
  .nav-menu.is-open{opacity:1;visibility:visible;transform:translateY(0);}
  .nav-menu a{
    font-size:18px;
    padding:16px 6px;
    border-bottom:1px solid var(--line-soft);
    border-radius:0;
  }
  .nav-menu a::after{display:none;}
  .nav-menu a.active{color:var(--cyan);}
  .nav-search{display:none;}
  .hero-grid{grid-template-columns:1fr;gap:32px;}
  .hero-copy h1{margin-top:14px;}
  .hero-media img{height:300px;}
  .overview-bar{grid-template-columns:repeat(2,1fr);}
  .overview-bar .ov-item:nth-child(2){border-right:0;}
  .overview-bar .ov-item:nth-child(1),
  .overview-bar .ov-item:nth-child(2){border-bottom:1px solid var(--line-soft);}
  .topic-grid{grid-template-columns:1fr;gap:22px;}
  .flow-grid{grid-template-columns:1fr;gap:24px;}
  .flow-item{padding-left:52px;}
  .sched-row{grid-template-columns:84px 1fr 90px;gap:12px;padding:16px 18px;}
  .sched-state{display:none;}
  .cta-band{flex-direction:column;align-items:flex-start;padding:34px 28px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .footer-brand{grid-column:1/-1;}
}
@media (max-width:575.98px){
  .nav-wrap{height:64px;gap:12px;}
  .nav-menu{top:64px;}
  .brand-name{font-size:15.5px;}
  .brand-mark{width:34px;height:34px;font-size:14px;}
  .btn-cta{height:36px;padding:0 13px;font-size:12.5px;}
  .nav-toggle{width:36px;height:36px;}
  .page-hero{padding:32px 0 52px;}
  .hero-copy h1{font-size:26px;}
  .hero-copy > p{font-size:15px;}
  .hero-actions .btn-main,.hero-actions .btn-ghost{width:100%;}
  .hero-media img{height:230px;}
  .hero-float{padding:11px 10px;}
  .hero-float strong{font-size:18px;}
  .overview-bar{grid-template-columns:1fr;}
  .overview-bar .ov-item{border-right:0;border-bottom:1px solid var(--line-soft);}
  .overview-bar .ov-item:last-child{border-bottom:0;}
  .topic-body{padding:18px 18px 20px;}
  .flow-card{padding:24px 20px;}
  .sched-row{grid-template-columns:1fr 76px;gap:8px;padding:14px 16px;}
  .sched-name{grid-column:1/2;grid-row:1;}
  .sched-date{grid-column:1/2;grid-row:2;font-size:13px;}
  .sched-time{grid-column:2/3;grid-row:1;text-align:right;}
  .cta-band h2{font-size:21px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;gap:6px;}
  .to-top{right:14px;bottom:16px;width:42px;height:42px;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;scroll-behavior:auto !important;}
}

/* roulang page: category3 */
:root{
  --bg-deep:#050914;
  --bg-mid:#0A1128;
  --bg-card:#0E1630;
  --glass:rgba(18,28,58,0.55);
  --glass-soft:rgba(18,28,58,0.35);
  --stroke:rgba(120,160,255,0.16);
  --line:rgba(120,160,255,0.14);
  --primary:#2E6BFF;
  --cyan:#22E0C8;
  --ember:#FF7A45;
  --t1:#F2F5FF;
  --t2:#A9B6D6;
  --t3:#6B7BA3;
  --r-lg:18px;
  --r-md:14px;
  --r-sm:12px;
  --shadow:0 8px 30px rgba(0,0,0,.45);
  --glow-cyan:0 0 24px rgba(34,224,200,.22);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg-deep);
  color:var(--t2);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{color:var(--cyan);text-decoration:none;transition:color .22s var(--ease)}
a:hover{color:#6ff3e2}
img{max-width:100%;display:block}
h1,h2,h3,h4,p,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
@media (min-width:1440px){.container{max-width:1280px}}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:1000;
  background:rgba(5,9,20,.74);
  backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  border-bottom:1px solid var(--line);
  transition:background .25s var(--ease),box-shadow .25s var(--ease),border-color .25s var(--ease);
}
.site-header.is-stuck{
  background:rgba(5,9,20,.92);
  border-bottom-color:rgba(34,224,200,.3);
  box-shadow:0 10px 34px rgba(0,0,0,.55);
}
.nav-wrap{display:flex;align-items:center;gap:28px;height:74px;transition:height .25s var(--ease)}
.site-header.is-stuck .nav-wrap{height:64px}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--t1);flex-shrink:0}
.brand:hover{color:var(--t1)}
.brand-mark{
  width:38px;height:38px;border-radius:11px;display:grid;place-items:center;
  background:linear-gradient(145deg,#2E6BFF,#0d2a6b);
  color:#fff;font-size:16px;
  border:1px solid rgba(34,224,200,.35);
  box-shadow:0 0 18px rgba(46,107,255,.35);
  flex-shrink:0;
}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-name{font-size:17px;font-weight:800;letter-spacing:.02em;color:var(--t1)}
.brand-sub{font-size:10px;letter-spacing:.12em;color:var(--cyan);opacity:.85;margin-top:3px}
.nav-menu{display:flex;align-items:center;gap:4px}
.nav-menu a{
  position:relative;display:inline-block;padding:8px 13px;border-radius:9px;
  font-size:15px;color:var(--t2);font-weight:500;
  transition:color .22s var(--ease),background .22s var(--ease);
}
.nav-menu a::after{
  content:"";position:absolute;left:13px;right:13px;bottom:2px;height:2px;border-radius:2px;
  background:var(--cyan);transform:scaleX(0);transform-origin:left;transition:transform .25s var(--ease);
  box-shadow:0 0 10px rgba(34,224,200,.7);
}
.nav-menu a:hover{color:var(--t1);background:rgba(120,160,255,.07)}
.nav-menu a:hover::after,.nav-menu a.active::after{transform:scaleX(1)}
.nav-menu a.active{color:var(--t1);font-weight:600}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:12px}
.nav-search{
  display:flex;align-items:center;gap:8px;
  background:rgba(18,28,58,.6);
  border:1px solid var(--stroke);border-radius:999px;
  padding:0 14px;height:38px;width:210px;
  transition:border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.nav-search:focus-within{border-color:var(--cyan);box-shadow:0 0 0 3px rgba(34,224,200,.12)}
.nav-search i{color:var(--cyan);font-size:13px}
.nav-search input{
  border:0;background:transparent;color:var(--t1);font-size:13px;width:100%;outline:none;
}
.nav-search input::placeholder{color:var(--t3)}
.btn-cta{
  display:inline-flex;align-items:center;justify-content:center;
  height:40px;padding:0 20px;border-radius:999px;
  background:var(--ember);color:#160a04;font-size:14px;font-weight:700;
  border:1px solid rgba(255,122,69,.5);
  box-shadow:0 0 20px rgba(255,122,69,.28);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),filter .22s var(--ease);
  white-space:nowrap;
}
.btn-cta:hover{color:#160a04;filter:brightness(1.08);transform:translateY(-2px);box-shadow:0 0 26px rgba(255,122,69,.42)}
.btn-cta:active{transform:translateY(0)}
.nav-toggle{
  display:none;width:40px;height:40px;border-radius:11px;
  background:rgba(18,28,58,.7);border:1px solid var(--stroke);color:var(--t1);
  font-size:16px;cursor:pointer;align-items:center;justify-content:center;
  transition:border-color .22s var(--ease),color .22s var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan)}

/* ---------- mobile drawer ---------- */
.drawer-mask{
  position:fixed;inset:0;background:rgba(2,5,14,.7);backdrop-filter:blur(4px);
  opacity:0;visibility:hidden;transition:.28s var(--ease);z-index:1090;
}
.drawer-mask.show{opacity:1;visibility:visible}
.mobile-drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(88vw,360px);z-index:1100;
  background:linear-gradient(180deg,rgba(14,22,48,.98),rgba(5,9,20,.99));
  border-left:1px solid var(--stroke);
  transform:translateX(102%);transition:transform .3s var(--ease);
  display:flex;flex-direction:column;padding:22px;gap:18px;overflow-y:auto;
}
.mobile-drawer.show{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between}
.drawer-head .brand-name{font-size:18px;font-weight:800;color:var(--t1)}
.drawer-close{
  width:38px;height:38px;border-radius:10px;background:rgba(120,160,255,.1);
  border:1px solid var(--stroke);color:var(--t1);cursor:pointer;font-size:15px;
}
.drawer-close:hover{color:var(--cyan);border-color:var(--cyan)}
.drawer-search{
  display:flex;align-items:center;gap:8px;height:44px;padding:0 16px;
  background:rgba(18,28,58,.7);border:1px solid var(--stroke);border-radius:12px;
}
.drawer-search input{border:0;background:transparent;outline:none;color:var(--t1);font-size:14px;width:100%}
.drawer-search input::placeholder{color:var(--t3)}
.drawer-nav{display:flex;flex-direction:column;gap:6px}
.drawer-nav a{
  padding:12px 14px;border-radius:12px;font-size:16px;color:var(--t2);
  border:1px solid transparent;transition:.22s var(--ease);
}
.drawer-nav a:hover,.drawer-nav a.active{
  background:rgba(120,160,255,.09);border-color:var(--stroke);color:var(--t1);
}
.drawer-nav a.active{border-color:rgba(34,224,200,.4);color:var(--cyan)}
.drawer-hot{display:flex;flex-wrap:wrap;gap:8px}

/* ---------- buttons ---------- */
.btn-primary{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  height:48px;padding:0 26px;border-radius:999px;
  background:var(--ember);color:#160a04;font-size:16px;font-weight:700;
  border:1px solid rgba(255,122,69,.5);
  box-shadow:0 0 24px rgba(255,122,69,.3);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),filter .22s var(--ease);
  cursor:pointer;
}
.btn-primary:hover{color:#160a04;transform:translateY(-2px);filter:brightness(1.08);box-shadow:0 0 32px rgba(255,122,69,.46)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  height:48px;padding:0 26px;border-radius:12px;
  background:transparent;color:var(--cyan);font-size:16px;font-weight:600;
  border:1px solid rgba(34,224,200,.55);
  transition:background .22s var(--ease),transform .22s var(--ease),box-shadow .22s var(--ease);
  cursor:pointer;
}
.btn-ghost:hover{background:rgba(34,224,200,.09);color:var(--cyan);transform:translateY(-2px);box-shadow:var(--glow-cyan)}
.btn-ghost:active{transform:translateY(1px)}
.link-arrow{display:inline-flex;align-items:center;gap:7px;font-size:14px;font-weight:600;color:var(--cyan)}
.link-arrow i{transition:transform .22s var(--ease)}
.link-arrow:hover i{transform:translateX(3px)}

/* ---------- badges / tags ---------- */
.badge-soft{
  display:inline-flex;align-items:center;gap:7px;
  padding:5px 14px;border-radius:999px;font-size:12.5px;font-weight:600;
  color:var(--cyan);border:1px solid rgba(34,224,200,.42);
  background:rgba(34,224,200,.07);letter-spacing:.04em;
}
.badge-blue{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:999px;font-size:12px;font-weight:600;
  color:#9fc0ff;border:1px solid rgba(46,107,255,.45);background:rgba(46,107,255,.1);
}
.badge-ember{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:999px;font-size:12px;font-weight:700;
  color:#ffb497;border:1px solid rgba(255,122,69,.5);background:rgba(255,122,69,.1);
}
.tag{
  display:inline-block;padding:4px 12px;border-radius:999px;
  font-size:12px;color:var(--t2);border:1px solid var(--stroke);background:rgba(120,160,255,.06);
  transition:.22s var(--ease);
}
a.tag:hover{color:var(--cyan);border-color:rgba(34,224,200,.5)}

/* ---------- hero ---------- */
.page-hero{
  position:relative;overflow:hidden;
  padding:64px 0 68px;
  background:url('/assets/images/backpic/back-2.png') center/cover no-repeat;
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(5,9,20,.9) 0%,rgba(5,9,20,.94) 55%,var(--bg-deep) 100%);
}
.page-hero::after{
  content:"";position:absolute;width:520px;height:520px;right:-140px;top:-180px;border-radius:50%;
  background:radial-gradient(circle,rgba(34,224,200,.22),transparent 66%);
  filter:blur(120px);pointer-events:none;
}
.page-hero .container{position:relative;z-index:2}
.breadcrumb-nav{display:flex;align-items:center;gap:9px;font-size:13px;color:var(--t3);margin-bottom:22px;flex-wrap:wrap}
.breadcrumb-nav a{color:var(--t3)}
.breadcrumb-nav a:hover{color:var(--cyan)}
.breadcrumb-nav i{font-size:10px;opacity:.6}
.hero-title{
  font-size:clamp(28px,3.8vw,44px);font-weight:800;line-height:1.2;letter-spacing:-.01em;
  color:var(--t1);margin:16px 0 18px;max-width:900px;
}
.hero-lead{font-size:17px;line-height:1.85;color:var(--t2);max-width:780px}
.hero-stats{display:flex;flex-wrap:wrap;gap:40px;margin-top:36px}
.stat-item{min-width:120px}
.stat-num{
  font-size:30px;font-weight:800;color:var(--t1);
  font-variant-numeric:tabular-nums;letter-spacing:.01em;
  padding-bottom:6px;border-bottom:2px solid rgba(34,224,200,.6);
  text-shadow:0 0 18px rgba(34,224,200,.35);
  display:inline-block;
}
.stat-num span{font-size:15px;color:var(--cyan);margin-left:4px;font-weight:600}
.stat-label{display:block;font-size:13px;color:var(--t3);margin-top:10px}

/* ---------- section basics ---------- */
.section{padding:88px 0;position:relative}
.section--alt{background:var(--bg-mid)}
.section-head{max-width:760px;margin-bottom:48px}
.section-head h2{
  font-size:clamp(23px,2.4vw,32px);font-weight:700;color:var(--t1);
  line-height:1.35;margin:14px 0 14px;
}
.section-head p{font-size:16px;color:var(--t2);line-height:1.85}
.net-grid::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(120,160,255,.05) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(120,160,255,.05) 1px,transparent 1px);
  background-size:48px 48px;
  mask-image:linear-gradient(180deg,rgba(0,0,0,.7),transparent 75%);
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.7),transparent 75%);
}

/* ---------- zigzag blocks ---------- */
.zig-list{display:flex;flex-direction:column;gap:36px}
.zig-item{
  display:grid;grid-template-columns:minmax(0,.92fr) minmax(0,1.08fr);
  gap:40px;align-items:center;
  padding:32px;border-radius:var(--r-lg);
  background:var(--glass);border:1px solid var(--stroke);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  box-shadow:var(--shadow);
  transition:border-color .28s var(--ease),transform .28s var(--ease);
  position:relative;overflow:hidden;
}
.zig-item::before{
  content:"";position:absolute;left:0;top:0;width:120px;height:1px;
  background:linear-gradient(90deg,rgba(34,224,200,.9),transparent);
}
.zig-item:hover{border-color:rgba(34,224,200,.45);transform:translateY(-4px)}
.zig-item.reverse{grid-template-columns:minmax(0,1.08fr) minmax(0,.92fr)}
.zig-item.reverse .zig-media{order:2}
.zig-media{
  position:relative;border-radius:var(--r-md);overflow:hidden;
  border:1px solid var(--stroke);
}
.zig-media img{
  width:100%;height:100%;aspect-ratio:4/3;object-fit:cover;
  filter:saturate(.9) brightness(.86);
  transition:transform .4s var(--ease),filter .4s var(--ease);
}
.zig-item:hover .zig-media img{transform:scale(1.03);filter:saturate(1) brightness(.95)}
.zig-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(160deg,rgba(5,9,20,.15),rgba(5,9,20,.62));
}
.zig-index{
  position:absolute;left:14px;bottom:12px;z-index:2;
  font-size:13px;font-weight:700;letter-spacing:.14em;color:var(--cyan);
  font-variant-numeric:tabular-nums;
}
.zig-body h3{font-size:22px;font-weight:700;color:var(--t1);margin-bottom:12px;line-height:1.4}
.zig-body > p{font-size:16px;color:var(--t2);margin-bottom:18px}
.check-list{display:flex;flex-direction:column;gap:10px}
.check-list li{
  position:relative;padding-left:26px;font-size:15px;color:var(--t2);line-height:1.75;
}
.check-list li::before{
  content:"\f00c";font-family:"Font Awesome 6 Free";font-weight:900;
  position:absolute;left:0;top:1px;font-size:12px;color:var(--cyan);
}
.zig-body .link-arrow{margin-top:20px}

/* ---------- metrics band ---------- */
.metrics-band{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));
  gap:1px;background:var(--stroke);
  border:1px solid var(--stroke);border-radius:var(--r-lg);overflow:hidden;
  box-shadow:var(--shadow);
}
.metric-cell{background:rgba(14,22,48,.86);padding:28px 24px;transition:background .25s var(--ease)}
.metric-cell:hover{background:rgba(20,32,66,.92)}
.metric-cell .num{
  font-size:26px;font-weight:800;color:var(--cyan);
  font-variant-numeric:tabular-nums;
  display:block;line-height:1.2;text-shadow:0 0 16px rgba(34,224,200,.35);
}
.metric-cell .num small{font-size:14px;color:var(--t2);margin-left:5px;font-weight:600}
.metric-cell h3{font-size:15px;font-weight:700;color:var(--t1);margin:10px 0 6px}
.metric-cell p{font-size:13.5px;color:var(--t3);line-height:1.7}

/* ---------- assure bar ---------- */
.assure-bar{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));
  gap:0;border-radius:var(--r-lg);overflow:hidden;
  background:var(--glass);border:1px solid var(--stroke);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  box-shadow:var(--shadow);
}
.assure-item{
  padding:28px 26px;position:relative;
  transition:background .25s var(--ease);
}
.assure-item + .assure-item::before{
  content:"";position:absolute;left:0;top:22px;bottom:22px;width:1px;background:var(--line);
}
.assure-item:hover{background:rgba(34,224,200,.05)}
.assure-item i{font-size:19px;color:var(--cyan);margin-bottom:14px;display:block}
.assure-item h4{font-size:16px;font-weight:700;color:var(--t1);margin-bottom:8px}
.assure-item p{font-size:14px;color:var(--t3);line-height:1.75}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;overflow:hidden;
  border-radius:var(--r-lg);border:1px solid var(--stroke);
  background:linear-gradient(120deg,rgba(18,28,58,.9),rgba(10,17,40,.94));
  padding:52px 48px;
  display:flex;align-items:center;justify-content:space-between;gap:36px;flex-wrap:wrap;
  box-shadow:var(--shadow);
}
.cta-band::before{
  content:"";position:absolute;right:-120px;top:-140px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(34,224,200,.28),transparent 68%);
  filter:blur(110px);pointer-events:none;
}
.cta-band::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(90deg,rgba(120,160,255,.06) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:linear-gradient(90deg,transparent,#000 80%);
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 80%);
}
.cta-text{position:relative;z-index:2;max-width:640px}
.cta-text h2{font-size:clamp(22px,2.4vw,30px);font-weight:800;color:var(--t1);line-height:1.4;margin-bottom:12px}
.cta-text p{font-size:16px;color:var(--t2)}
.cta-actions{position:relative;z-index:2;display:flex;gap:14px;flex-wrap:wrap}

/* ---------- footer ---------- */
.site-footer{
  background:linear-gradient(180deg,var(--bg-mid),var(--bg-deep));
  border-top:1px solid var(--line);
  padding:64px 0 0;margin-top:0;
}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:44px;
  padding-bottom:48px;
}
.footer-brand .brand{margin-bottom:18px}
.footer-brand p{font-size:14px;color:var(--t3);line-height:1.85;max-width:380px}
.footer-note{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.footer-note span{
  font-size:12px;color:var(--t2);padding:4px 12px;border-radius:999px;
  border:1px solid var(--stroke);background:rgba(120,160,255,.05);
}
.footer-col h4{font-size:15px;font-weight:700;color:var(--t1);margin-bottom:16px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col ul a{font-size:14px;color:var(--t3);transition:color .22s var(--ease),padding-left .22s var(--ease)}
.footer-col ul a:hover{color:var(--cyan);padding-left:4px}
.footer-bottom{
  display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;
  padding:22px 0 28px;border-top:1px solid var(--line);
  font-size:13px;color:var(--t3);
}
.to-top{
  position:fixed;right:24px;bottom:26px;z-index:900;
  width:46px;height:46px;border-radius:50%;
  display:grid;place-items:center;
  background:rgba(18,28,58,.85);border:1px solid var(--stroke);color:var(--t1);
  backdrop-filter:blur(12px);cursor:pointer;
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:.28s var(--ease);
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{color:var(--cyan);border-color:var(--cyan);box-shadow:var(--glow-cyan)}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  .nav-search{width:170px}
  .nav-menu a{padding:8px 10px;font-size:14.5px}
}
@media (max-width:991px){
  .nav-menu,.nav-search{display:none}
  .nav-toggle{display:inline-flex}
  .zig-item,.zig-item.reverse{grid-template-columns:1fr;gap:26px}
  .zig-item.reverse .zig-media{order:0}
  .metrics-band{grid-template-columns:repeat(2,minmax(0,1fr))}
  .assure-bar{grid-template-columns:repeat(2,minmax(0,1fr))}
  .assure-item:nth-child(3)::before{display:none}
  .assure-item:nth-child(odd)::before{display:none}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px}
}
@media (max-width:767px){
  .container{padding:0 20px}
  .section{padding:56px 0}
  .page-hero{padding:44px 0 52px}
  .btn-cta{display:none}
  .hero-stats{gap:26px;margin-top:28px}
  .stat-num{font-size:25px}
  .zig-item{padding:22px}
  .cta-band{padding:34px 24px;flex-direction:column;align-items:flex-start}
  .cta-actions{width:100%}
  .btn-primary,.btn-ghost{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px}
  .to-top{right:16px;bottom:18px;width:42px;height:42px}
}
@media (max-width:520px){
  body{font-size:15.5px}
  .metrics-band{grid-template-columns:1fr}
  .assure-bar{grid-template-columns:1fr}
  .assure-item + .assure-item::before{display:none}
  .assure-item{border-top:1px solid var(--line)}
  .assure-item:first-child{border-top:0}
  .hero-stats{gap:20px}
  .stat-item{min-width:45%}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
}

/* roulang page: category4 */
:root{
  --bg-deep:#050914;
  --bg-mid:#0A1128;
  --bg-card:#0E1630;
  --glass:rgba(18,28,58,0.55);
  --glass-strong:rgba(18,28,58,0.78);
  --line:rgba(120,160,255,0.14);
  --line-strong:rgba(120,160,255,0.22);
  --primary:#2E6BFF;
  --cyan:#22E0C8;
  --ember:#FF7A45;
  --t1:#F2F5FF;
  --t2:#A9B6D6;
  --t3:#6B7BA3;
  --radius-xl:22px;
  --radius-lg:18px;
  --radius-md:12px;
  --radius-sm:10px;
  --shadow:0 8px 30px rgba(0,0,0,0.45);
  --shadow-soft:0 4px 18px rgba(0,0,0,0.35);
  --glow-cyan:0 0 24px rgba(34,224,200,0.22);
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-mono:"SF Mono",ui-monospace,"JetBrains Mono",Menlo,Consolas,monospace;
  --ease:cubic-bezier(.2,.7,.3,1);
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-deep);
  color:var(--t2);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  background-image:
    linear-gradient(rgba(120,160,255,0.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(120,160,255,0.05) 1px,transparent 1px);
  background-size:48px 48px;
  opacity:.55;
  z-index:0;
}
img{max-width:100%;display:block;}
a{color:var(--cyan);text-decoration:none;transition:color .25s var(--ease);}
a:hover{color:#5AF0DC;}
h1,h2,h3,h4,h5{color:var(--t1);margin:0;font-weight:700;line-height:1.3;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
::selection{background:rgba(34,224,200,0.25);color:#fff;}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px;}

.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:20px;
  padding-right:20px;
  position:relative;
  z-index:1;
}

/* ============ 导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:1000;
  background:rgba(5,9,20,0.72);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  border-bottom:1px solid var(--line);
  transition:background .25s var(--ease),box-shadow .25s var(--ease),padding .25s var(--ease);
}
.site-header.is-stuck{
  background:rgba(5,9,20,0.9);
  box-shadow:0 1px 0 rgba(34,224,200,0.28),0 12px 30px rgba(0,0,0,0.45);
}
.nav-wrap{
  display:flex;
  align-items:center;
  gap:24px;
  min-height:70px;
  padding:10px 0;
  transition:min-height .25s var(--ease);
}
.site-header.is-stuck .nav-wrap{min-height:60px;}
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  flex-shrink:0;
}
.brand-mark{
  width:40px;height:40px;
  display:grid;place-items:center;
  border-radius:12px;
  background:linear-gradient(145deg,rgba(46,107,255,0.85),rgba(34,224,200,0.6));
  color:#050914;
  font-size:16px;
  box-shadow:0 6px 20px rgba(46,107,255,0.35);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-name{
  color:var(--t1);
  font-size:18px;
  font-weight:800;
  letter-spacing:0.02em;
}
.brand-sub{
  font-size:10px;
  letter-spacing:0.12em;
  color:var(--cyan);
  opacity:.85;
  margin-top:3px;
}
.nav-menu{
  display:flex;
  align-items:center;
  gap:6px;
  flex:1;
  flex-wrap:wrap;
}
.nav-menu a{
  position:relative;
  display:inline-block;
  padding:8px 14px;
  font-size:15px;
  font-weight:500;
  color:var(--t2);
  border-radius:10px;
  transition:color .25s var(--ease),background .25s var(--ease);
}
.nav-menu a::after{
  content:"";
  position:absolute;
  left:14px;right:14px;bottom:3px;
  height:2px;
  border-radius:2px;
  background:var(--cyan);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .28s var(--ease);
}
.nav-menu a:hover{color:var(--t1);background:rgba(120,160,255,0.08);}
.nav-menu a:hover::after{transform:scaleX(1);}
.nav-menu a.active{color:var(--t1);font-weight:700;}
.nav-menu a.active::after{transform:scaleX(1);}
.nav-right{display:flex;align-items:center;gap:14px;flex-shrink:0;}
.nav-search{
  display:flex;
  align-items:center;
  gap:8px;
  height:40px;
  padding:0 14px;
  border-radius:999px;
  border:1px solid var(--line);
  background:rgba(14,22,48,0.7);
  transition:border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.nav-search:focus-within{
  border-color:rgba(34,224,200,0.6);
  box-shadow:0 0 0 3px rgba(34,224,200,0.12);
}
.nav-search i{color:var(--cyan);font-size:13px;}
.nav-search input{
  width:170px;
  border:none;
  outline:none;
  background:transparent;
  color:var(--t1);
  font-size:13px;
}
.nav-search input::placeholder{color:var(--t3);}
.btn-cta{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:44px;
  padding:0 22px;
  border-radius:999px;
  background:var(--ember);
  color:#20100A;
  font-size:15px;
  font-weight:700;
  letter-spacing:0.01em;
  border:1px solid rgba(255,122,69,0.6);
  box-shadow:0 0 24px rgba(255,122,69,0.28);
  transition:transform .25s var(--ease),filter .25s var(--ease),box-shadow .25s var(--ease);
}
.btn-cta:hover{
  color:#20100A;
  filter:brightness(1.08);
  transform:translateY(-2px);
  box-shadow:0 0 32px rgba(255,122,69,0.45);
}
.btn-cta:active{transform:translateY(1px);}
.nav-toggle{
  display:none;
  width:42px;height:42px;
  border-radius:12px;
  border:1px solid var(--line-strong);
  background:rgba(14,22,48,0.8);
  color:var(--t1);
  font-size:16px;
  cursor:pointer;
  transition:border-color .25s var(--ease),color .25s var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan);}

/* 移动端抽屉 */
.mobile-drawer{
  position:fixed;
  inset:0;
  z-index:1200;
  display:none;
  background:rgba(5,9,20,0.94);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  padding:24px 20px 40px;
  overflow-y:auto;
}
.mobile-drawer.open{display:block;}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:26px;}
.drawer-close{
  width:42px;height:42px;border-radius:12px;
  border:1px solid var(--line-strong);
  background:transparent;color:var(--t1);font-size:18px;cursor:pointer;
}
.drawer-close:hover{border-color:var(--cyan);color:var(--cyan);}
.drawer-links{display:flex;flex-direction:column;gap:6px;margin-bottom:24px;}
.drawer-links a{
  display:flex;align-items:center;justify-content:space-between;
  padding:16px 4px;
  font-size:19px;
  font-weight:600;
  color:var(--t1);
  border-bottom:1px solid var(--line);
}
.drawer-links a.active{color:var(--cyan);}
.drawer-links a i{font-size:13px;color:var(--t3);}
.drawer-search{
  display:flex;align-items:center;gap:10px;
  height:48px;padding:0 16px;border-radius:14px;
  border:1px solid var(--line);background:rgba(14,22,48,0.75);
  margin-bottom:22px;
}
.drawer-search i{color:var(--cyan);}
.drawer-search input{flex:1;background:transparent;border:none;outline:none;color:var(--t1);font-size:15px;}
.drawer-cta{width:100%;height:50px;border-radius:14px;font-size:16px;}
.drawer-tags{display:flex;gap:8px;flex-wrap:wrap;margin-top:22px;}

/* ============ 通用组件 ============ */
.glass-card{
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-soft);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  position:relative;
  overflow:hidden;
  transition:transform .28s var(--ease),border-color .28s var(--ease),box-shadow .28s var(--ease);
}
.glass-card::before{
  content:"";
  position:absolute;
  top:0;left:0;
  width:64px;height:1px;
  background:linear-gradient(90deg,rgba(34,224,200,0.9),transparent);
}
.glass-card:hover{
  transform:translateY(-4px);
  border-color:rgba(34,224,200,0.45);
  box-shadow:0 14px 36px rgba(0,0,0,0.5);
}
.badge-pill{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 13px;
  border-radius:999px;
  font-size:12px;
  letter-spacing:0.04em;
  border:1px solid rgba(34,224,200,0.4);
  color:var(--cyan);
  background:rgba(34,224,200,0.08);
  font-weight:600;
}
.badge-pill.blue{
  border-color:rgba(46,107,255,0.45);
  color:#8AB0FF;
  background:rgba(46,107,255,0.12);
}
.badge-pill.ember{
  border-color:rgba(255,122,69,0.5);
  color:var(--ember);
  background:rgba(255,122,69,0.1);
}
.btn-main{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  height:48px;padding:0 26px;
  border-radius:12px;
  background:var(--ember);
  color:#20100A;
  font-size:16px;font-weight:700;
  border:1px solid rgba(255,122,69,0.65);
  box-shadow:0 0 24px rgba(255,122,69,0.28);
  transition:transform .25s var(--ease),filter .25s var(--ease),box-shadow .25s var(--ease);
  cursor:pointer;
}
.btn-main:hover{color:#20100A;filter:brightness(1.08);transform:translateY(-2px);box-shadow:0 0 34px rgba(255,122,69,0.45);}
.btn-main:active{transform:translateY(1px);}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  height:48px;padding:0 26px;
  border-radius:12px;
  background:transparent;
  color:var(--cyan);
  font-size:16px;font-weight:600;
  border:1px solid rgba(34,224,200,0.55);
  transition:background .25s var(--ease),transform .25s var(--ease),box-shadow .25s var(--ease);
}
.btn-ghost:hover{
  color:#7CF3E4;
  background:rgba(34,224,200,0.08);
  transform:translateY(-2px);
  box-shadow:var(--glow-cyan);
}
.btn-ghost:active{transform:translateY(1px);}
.text-link{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--cyan);font-size:14px;font-weight:600;
}
.text-link i{transition:transform .25s var(--ease);font-size:12px;}
.text-link:hover i{transform:translateX(3px);}

/* ============ 面包屑 ============ */
.breadcrumb-bar{padding:22px 0 0;}
.crumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--t3);
}
.crumbs a{color:var(--t3);}
.crumbs a:hover{color:var(--cyan);}
.crumbs i{font-size:10px;opacity:.7;}
.crumbs .current{color:var(--t2);}

/* ============ Hero ============ */
.page-hero{
  position:relative;
  padding:34px 0 56px;
  overflow:hidden;
}
.page-hero::before{
  content:"";
  position:absolute;
  top:-160px;right:-120px;
  width:520px;height:520px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(34,224,200,0.16),transparent 68%);
  filter:blur(120px);
  pointer-events:none;
}
.page-hero::after{
  content:"";
  position:absolute;
  bottom:-220px;left:-140px;
  width:480px;height:480px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(46,107,255,0.2),transparent 70%);
  filter:blur(120px);
  pointer-events:none;
}
.hero-inner{position:relative;z-index:1;max-width:840px;}
.hero-inner h1{
  font-size:clamp(30px,4vw,46px);
  font-weight:800;
  line-height:1.18;
  letter-spacing:-0.01em;
  margin:20px 0 18px;
}
.hero-inner h1 em{
  font-style:normal;
  background:linear-gradient(90deg,var(--cyan),#7CC4FF);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.hero-desc{
  font-size:17px;
  line-height:1.85;
  color:var(--t2);
  max-width:720px;
}
.hero-meta{
  display:flex;
  flex-wrap:wrap;
  gap:28px;
  margin-top:30px;
  padding-top:24px;
  border-top:1px solid var(--line);
}
.hero-meta .stat-item{display:flex;flex-direction:column;gap:2px;}
.hero-meta .stat-num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-size:24px;
  font-weight:700;
  color:var(--t1);
  letter-spacing:0.01em;
}
.hero-meta .stat-num span{color:var(--cyan);}
.hero-meta .stat-label{font-size:13px;color:var(--t3);letter-spacing:0.04em;}

/* ============ 主体两栏 ============ */
.qa-section{padding:8px 0 72px;}
.qa-layout{
  display:grid;
  grid-template-columns:minmax(0,1.6fr) minmax(0,1fr);
  gap:32px;
  align-items:start;
}
.section-head{margin-bottom:24px;}
.section-head h2{
  font-size:clamp(22px,2.4vw,30px);
  font-weight:700;
  display:flex;
  align-items:center;
  gap:12px;
}
.section-head h2::before{
  content:"";
  width:4px;height:22px;
  border-radius:3px;
  background:linear-gradient(180deg,var(--cyan),var(--primary));
  box-shadow:0 0 14px rgba(34,224,200,0.6);
}
.section-head p{
  margin-top:10px;
  font-size:14.5px;
  color:var(--t3);
}

/* 手风琴改造 */
.qa-accordion .accordion-item{
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:14px;
  margin-bottom:12px;
  overflow:hidden;
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  transition:border-color .28s var(--ease),box-shadow .28s var(--ease);
}
.qa-accordion .accordion-item:hover{border-color:rgba(34,224,200,0.4);}
.qa-accordion .accordion-button{
  display:flex;
  align-items:center;
  gap:14px;
  width:100%;
  padding:20px 54px 20px 22px;
  background:transparent;
  border:none;
  color:var(--t1);
  font-size:16.5px;
  font-weight:600;
  line-height:1.55;
  text-align:left;
  box-shadow:none;
  transition:color .25s var(--ease),box-shadow .25s var(--ease);
}
.qa-accordion .accordion-button:not(.collapsed){
  color:var(--t1);
  background:rgba(34,224,200,0.06);
  box-shadow:inset 3px 0 0 var(--cyan);
}
.qa-accordion .accordion-button:focus{
  outline:none;
  box-shadow:inset 0 0 0 2px rgba(34,224,200,0.5);
}
.qa-accordion .accordion-button::after{
  content:"\f078";
  font-family:"Font Awesome 6 Free";
  font-weight:900;
  font-size:12px;
  color:var(--cyan);
  background-image:none;
  width:auto;height:auto;
  transform:none;
  position:absolute;
  right:22px;top:50%;
  margin-top:-6px;
  transition:transform .3s var(--ease),opacity .25s var(--ease);
  opacity:.85;
}
.qa-accordion .accordion-button:not(.collapsed)::after{
  transform:rotate(180deg);
  opacity:1;
}
.qa-accordion .accordion-body{
  padding:0 24px 22px 22px;
  color:var(--t2);
  font-size:15.5px;
  line-height:1.9;
}
.qa-accordion .accordion-body p + p{margin-top:12px;}
.qa-accordion .accordion-body strong{color:var(--cyan);font-weight:600;}

/* 侧栏 */
.side-stack{display:flex;flex-direction:column;gap:20px;position:sticky;top:96px;}
.search-card{padding:24px;}
.search-card h3{font-size:17px;margin-bottom:8px;}
.search-card .hint{font-size:13.5px;color:var(--t3);margin-bottom:16px;}
.search-field{
  display:flex;align-items:center;gap:10px;
  height:48px;padding:0 16px;
  border-radius:12px;
  border:1px solid var(--line-strong);
  background:rgba(10,17,40,0.85);
  transition:border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.search-field:focus-within{
  border-color:rgba(34,224,200,0.7);
  box-shadow:0 0 0 3px rgba(34,224,200,0.12);
}
.search-field i{color:var(--cyan);font-size:14px;}
.search-field input{
  flex:1;border:none;outline:none;background:transparent;
  color:var(--t1);font-size:14.5px;
}
.search-field input::placeholder{color:var(--t3);}
.search-field button{
  border:none;background:transparent;color:var(--t3);
  font-size:13px;cursor:pointer;padding:4px 6px;border-radius:6px;
  transition:color .25s var(--ease);
}
.search-field button:hover{color:var(--cyan);}
.tag-cloud{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px;}
.tag-cloud a{
  display:inline-block;
  padding:6px 12px;
  border-radius:999px;
  font-size:12.5px;
  color:var(--t2);
  border:1px solid var(--line);
  background:rgba(14,22,48,0.6);
  transition:all .25s var(--ease);
}
.tag-cloud a:hover{
  color:var(--cyan);
  border-color:rgba(34,224,200,0.55);
  background:rgba(34,224,200,0.08);
  transform:translateY(-2px);
}
.tip-card{padding:22px 24px;}
.tip-card h3{font-size:16px;margin-bottom:14px;display:flex;align-items:center;gap:9px;}
.tip-card h3 i{color:var(--ember);font-size:14px;}
.tip-list li{
  display:flex;
  gap:10px;
  font-size:14px;
  line-height:1.75;
  color:var(--t2);
  padding:9px 0;
  border-bottom:1px dashed rgba(120,160,255,0.12);
}
.tip-list li:last-child{border-bottom:none;padding-bottom:0;}
.tip-list li i{color:var(--cyan);font-size:11px;margin-top:8px;flex-shrink:0;}
.side-cta{padding:24px;}
.side-cta p{font-size:14px;color:var(--t3);margin-bottom:16px;line-height:1.8;}
.side-cta .btn-ghost{width:100%;height:46px;font-size:15px;}

/* ============ 延伸阅读 紧凑卡 ============ */
.more-section{padding:0 0 76px;}
.more-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:20px;
}
.mini-card{
  display:flex;
  gap:14px;
  padding:16px;
  align-items:center;
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--radius-md);
  transition:transform .28s var(--ease),border-color .28s var(--ease),box-shadow .28s var(--ease);
  height:100%;
}
.mini-card:hover{
  transform:translateY(-4px);
  border-color:rgba(34,224,200,0.45);
  box-shadow:0 12px 30px rgba(0,0,0,0.5);
}
.mini-thumb{
  width:88px;height:88px;
  flex-shrink:0;
  border-radius:11px;
  overflow:hidden;
  position:relative;
}
.mini-thumb img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform .35s var(--ease),filter .35s var(--ease);
  filter:saturate(0.85) brightness(0.9);
}
.mini-card:hover .mini-thumb img{transform:scale(1.06);filter:saturate(1) brightness(1);}
.mini-body{min-width:0;}
.mini-body h3{
  font-size:15.5px;
  font-weight:600;
  line-height:1.5;
  margin-bottom:6px;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.mini-body h3 a{color:var(--t1);}
.mini-body h3 a:hover{color:var(--cyan);}
.mini-time{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-size:12px;
  color:var(--t3);
  letter-spacing:0.03em;
}

/* ============ CTA ============ */
.cta-section{padding:0 0 84px;}
.cta-panel{
  position:relative;
  overflow:hidden;
  padding:44px 48px;
  border-radius:var(--radius-xl);
  background:linear-gradient(120deg,rgba(14,22,48,0.95),rgba(10,17,40,0.85));
  border:1px solid rgba(34,224,200,0.22);
  box-shadow:var(--shadow);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:34px;
  flex-wrap:wrap;
}
.cta-panel::before{
  content:"";
  position:absolute;
  top:-140px;right:-80px;
  width:380px;height:380px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(34,224,200,0.2),transparent 70%);
  filter:blur(90px);
  pointer-events:none;
}
.cta-panel::after{
  content:"";
  position:absolute;
  inset:0;
  background-image:linear-gradient(rgba(120,160,255,0.06) 1px,transparent 1px),linear-gradient(90deg,rgba(120,160,255,0.06) 1px,transparent 1px);
  background-size:44px 44px;
  opacity:.5;
  pointer-events:none;
  mask-image:linear-gradient(90deg,transparent,#000 60%);
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 60%);
}
.cta-text{position:relative;z-index:1;max-width:620px;}
.cta-text h2{font-size:clamp(22px,2.6vw,30px);margin-bottom:10px;}
.cta-text p{font-size:15px;color:var(--t2);}
.cta-actions{position:relative;z-index:1;display:flex;gap:14px;flex-wrap:wrap;}

/* ============ 页脚 ============ */
.site-footer{
  position:relative;
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(10,17,40,0.9),rgba(5,9,20,1));
  padding:64px 0 0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1fr;
  gap:36px;
  padding-bottom:48px;
}
.footer-brand .brand{margin-bottom:18px;}
.footer-brand p{
  font-size:14px;
  line-height:1.85;
  color:var(--t3);
  max-width:340px;
}
.footer-note{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin-top:18px;
}
.footer-note span{
  font-size:11.5px;
  letter-spacing:0.06em;
  color:var(--t3);
  border:1px solid var(--line);
  padding:4px 10px;
  border-radius:999px;
}
.footer-col h4{
  font-size:14px;
  font-weight:700;
  color:var(--t1);
  letter-spacing:0.06em;
  margin-bottom:16px;
}
.footer-col ul{display:flex;flex-direction:column;gap:11px;}
.footer-col ul a{
  font-size:14px;
  color:var(--t3);
  transition:color .25s var(--ease),padding-left .25s var(--ease);
}
.footer-col ul a:hover{color:var(--cyan);padding-left:4px;}
.footer-bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  padding:22px 0 26px;
  border-top:1px solid var(--line);
  font-size:12.5px;
  color:var(--t3);
}
.footer-bottom span{line-height:1.7;}

/* 返回顶部 */
.back-top{
  position:fixed;
  right:24px;
  bottom:28px;
  width:46px;height:46px;
  border-radius:50%;
  display:grid;place-items:center;
  background:rgba(18,28,58,0.85);
  border:1px solid rgba(34,224,200,0.4);
  color:var(--cyan);
  font-size:15px;
  cursor:pointer;
  opacity:0;
  visibility:hidden;
  transform:translateY(12px);
  transition:all .3s var(--ease);
  z-index:900;
  backdrop-filter:blur(12px);
}
.back-top.show{opacity:1;visibility:visible;transform:translateY(0);}
.back-top:hover{background:rgba(34,224,200,0.16);box-shadow:var(--glow-cyan);}

/* ============ 响应式 ============ */
@media (max-width:1199.98px){
  .hero-inner{max-width:100%;}
}
@media (max-width:991.98px){
  .nav-menu{display:none;}
  .nav-search{display:none;}
  .nav-toggle{display:inline-grid;place-items:center;}
  .nav-right .btn-cta{display:none;}
  .nav-wrap{gap:12px;justify-content:space-between;}
  .qa-layout{grid-template-columns:1fr;gap:28px;}
  .side-stack{position:static;}
  .more-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px;}
  .footer-brand{grid-column:1 / -1;}
  .footer-brand p{max-width:100%;}
  .cta-panel{padding:34px 28px;}
}
@media (max-width:767.98px){
  body{font-size:15.5px;}
  .nav-wrap{min-height:62px;}
  .brand-name{font-size:16.5px;}
  .brand-mark{width:36px;height:36px;border-radius:11px;font-size:14px;}
  .page-hero{padding:24px 0 42px;}
  .hero-inner h1{margin:16px 0 14px;}
  .hero-desc{font-size:15.5px;}
  .hero-meta{gap:18px 26px;margin-top:24px;}
  .hero-meta .stat-num{font-size:20px;}
  .qa-section{padding-bottom:54px;}
  .qa-accordion .accordion-button{font-size:15.3px;padding:17px 46px 17px 18px;}
  .qa-accordion .accordion-button::after{right:18px;}
  .qa-accordion .accordion-body{padding:0 18px 18px 18px;font-size:15px;}
  .more-grid{grid-template-columns:1fr;}
  .more-section{padding-bottom:58px;}
  .cta-section{padding-bottom:60px;}
  .cta-panel{padding:28px 22px;gap:22px;}
  .cta-actions{width:100%;}
  .cta-actions .btn-main,.cta-actions .btn-ghost{flex:1;min-width:150px;}
  .footer-grid{grid-template-columns:1fr;gap:26px;padding-bottom:34px;}
  .site-footer{padding-top:48px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;}
  .back-top{right:16px;bottom:18px;width:42px;height:42px;}
}
@media (max-width:520px){
  .container{padding-left:16px;padding-right:16px;}
  .hero-inner h1{font-size:27px;}
  .mini-thumb{width:76px;height:76px;}
  .search-card,.tip-card,.side-cta{padding:20px;}
  .cta-actions .btn-main,.cta-actions .btn-ghost{width:100%;flex:none;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .glass-card:hover,.mini-card:hover,.tag-cloud a:hover,.btn-main:hover,.btn-ghost:hover,.btn-cta:hover{transform:none;}
}