/* roulang page: index */
:root{
  --bg-0:#070B14;
  --bg-1:#0C1322;
  --bg-2:#131C31;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --brand:#2F6BFF;
  --brand-600:#2358E0;
  --brand-300:#7FA6FF;
  --accent:#17C3B2;
  --warm:#FFB020;
  --text-1:#E8EDF7;
  --text-2:#A7B3C9;
  --text-3:#6B7893;
  --r-card:16px;
  --r-card-lg:20px;
  --r-btn:12px;
  --r-badge:6px;
  --shadow-card:0 20px 40px -24px rgba(0,0,0,.85);
  --ease:cubic-bezier(.2,.7,.3,1);
  --nav-h:64px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--text-1);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  font-size:16px;
  line-height:1.85;
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0;}
a{color:var(--text-2);text-decoration:none;transition:color .2s var(--ease);}
a:hover{color:var(--accent);}
button,input{font-family:inherit;font-size:inherit;color:inherit;}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.01em;line-height:1.25;color:var(--text-1);}
p{margin:0 0 1.25em;}
p:last-child{margin-bottom:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:4px;}

.container-x{width:100%;max-width:1200px;margin:0 auto;padding:0 20px;}
@media(min-width:768px){.container-x{padding:0 24px;}}
@media(min-width:1024px){.container-x{padding:0 32px;}}

.section{padding:56px 0;}
@media(min-width:768px){.section{padding:72px 0;}}
@media(min-width:1024px){.section{padding:96px 0;}}
.section--alt{background:var(--bg-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}

.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.08em;text-transform:uppercase;
  color:var(--brand-300);margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--accent);display:block;}
.h2-title{font-size:26px;line-height:1.3;}
@media(min-width:768px){.h2-title{font-size:30px;}}
@media(min-width:1024px){.h2-title{font-size:32px;}}
.section-lead{color:var(--text-2);font-size:15px;max-width:720px;margin-top:12px;}
.section-head{display:flex;flex-wrap:wrap;gap:16px;align-items:flex-end;justify-content:space-between;margin-bottom:36px;}

/* 导航 */
.nav-shell{
  position:fixed;left:50%;transform:translateX(-50%);
  top:20px;width:min(1120px,calc(100% - 32px));
  height:var(--nav-h);z-index:80;
  transition:top .2s var(--ease);
}
.nav-inner{
  display:flex;align-items:center;justify-content:space-between;
  height:100%;padding:0 10px 0 18px;
  border-radius:999px;
  background:rgba(9,14,26,.72);
  -webkit-backdrop-filter:blur(18px);
  backdrop-filter:blur(18px);
  border:1px solid rgba(255,255,255,.10);
  box-shadow:inset 0 -1px 0 rgba(255,255,255,.06);
  transition:background .2s var(--ease),box-shadow .2s var(--ease);
}
.nav-shell.is-scrolled{top:12px;}
.nav-shell.is-scrolled .nav-inner{
  background:rgba(9,14,26,.9);
  box-shadow:0 18px 40px -22px rgba(0,0,0,.9),inset 0 -1px 0 rgba(255,255,255,.06);
}
.brand{display:flex;align-items:center;gap:10px;color:var(--text-1);font-weight:700;font-size:15px;white-space:nowrap;}
.brand:hover{color:var(--text-1);}
.brand-mark{
  width:30px;height:30px;border-radius:9px;flex:0 0 30px;
  background:linear-gradient(180deg,#3B7BFF,#2358E0);
  box-shadow:0 0 0 1px rgba(127,166,255,.5) inset,0 8px 22px -10px rgba(47,107,255,.9);
  display:flex;align-items:center;justify-content:center;
}
.brand-mark span{width:12px;height:12px;border-radius:3px;border:2px solid #fff;border-right-color:transparent;border-bottom-color:transparent;transform:rotate(45deg);}
.nav-links{display:none;align-items:center;gap:4px;}
@media(min-width:1024px){.nav-links{display:flex;}}
.nav-link{
  position:relative;display:inline-flex;align-items:center;
  height:40px;padding:0 14px;border-radius:999px;
  font-size:15px;color:var(--text-2);
}
.nav-link::after{
  content:"";position:absolute;left:50%;bottom:4px;transform:translateX(-50%);
  width:0;height:2px;background:var(--accent);border-radius:2px;transition:width .2s var(--ease);
}
.nav-link:hover{color:var(--text-1);}
.nav-link:hover::after{width:60%;}
.nav-link.is-active{color:var(--brand-300);background:rgba(47,107,255,.10);}
.nav-link.is-active::after{width:0;}
.nav-actions{display:flex;align-items:center;gap:8px;}
.nav-cta{
  display:none;align-items:center;height:44px;padding:0 20px;border-radius:999px;
  font-size:15px;font-weight:600;color:#fff;
  background:linear-gradient(180deg,#3B7BFF,#2358E0);
  box-shadow:0 0 0 1px rgba(127,166,255,.45) inset,0 8px 30px rgba(47,107,255,.35);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),filter .2s var(--ease);
}
.nav-cta:hover{color:#fff;transform:translateY(-1px);filter:brightness(1.06);box-shadow:0 0 0 1px rgba(127,166,255,.6) inset,0 12px 36px rgba(47,107,255,.5);}
@media(min-width:768px){.nav-cta{display:inline-flex;}}
.nav-toggle{
  display:inline-flex;align-items:center;justify-content:center;
  width:44px;height:44px;border-radius:999px;background:rgba(255,255,255,.06);
  border:1px solid var(--line);cursor:pointer;
}
@media(min-width:1024px){.nav-toggle{display:none;}}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--text-1);border-radius:2px;position:relative;}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--text-1);border-radius:2px;}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}
.drawer{
  position:fixed;top:0;left:0;right:0;z-index:90;
  background:var(--bg-1);border-bottom:1px solid var(--line);
  padding:80px 20px 20px;transform:translateY(-110%);
  transition:transform .25s var(--ease);
}
.drawer.is-open{transform:translateY(0);}
.drawer a{
  display:flex;align-items:center;height:52px;padding:0 12px;border-radius:12px;
  font-size:16px;color:var(--text-1);border-bottom:1px solid var(--line);
}
.drawer a:hover{color:var(--accent);}
.drawer .drawer-cta{
  margin-top:16px;justify-content:center;height:48px;border:0;
  background:linear-gradient(180deg,#3B7BFF,#2358E0);color:#fff;font-weight:600;border-radius:12px;
}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-btn);
  font-size:16px;font-weight:600;cursor:pointer;border:0;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),filter .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
}
.btn-primary{
  color:#fff;background:linear-gradient(180deg,#3B7BFF,#2358E0);
  box-shadow:0 0 0 1px rgba(127,166,255,.45) inset,0 8px 30px rgba(47,107,255,.35);
}
.btn-primary:hover{color:#fff;transform:translateY(-1px);filter:brightness(1.06);box-shadow:0 0 0 1px rgba(127,166,255,.6) inset,0 12px 38px rgba(47,107,255,.5);}
.btn-primary:active{transform:translateY(1px);box-shadow:0 0 0 1px rgba(127,166,255,.3) inset,0 4px 14px rgba(47,107,255,.28);}
.btn-ghost{
  color:var(--text-1);background:transparent;border:1px solid var(--line-strong);
}
.btn-ghost:hover{color:#fff;border-color:rgba(47,107,255,.65);transform:translateY(-1px);}
.btn-ghost:active{transform:translateY(1px);}
.btn-sm{height:40px;padding:0 18px;font-size:15px;}
.link-more{color:var(--accent);font-size:15px;font-weight:600;display:inline-flex;align-items:center;gap:6px;}
.link-more:hover{color:var(--accent);text-decoration:underline;}

/* Hero */
.hero{position:relative;overflow:hidden;padding-top:150px;padding-bottom:0;}
.hero-bg{
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
  opacity:.55;
}
.hero-mask{
  position:absolute;inset:0;
  background:
    linear-gradient(180deg,rgba(7,11,20,.55) 0%,rgba(7,11,20,.82) 55%,rgba(7,11,20,.96) 88%,#070B14 100%),
    linear-gradient(115deg,rgba(7,11,20,.92) 0%,rgba(7,11,20,.45) 55%,rgba(7,11,20,.85) 100%);
}
.hero-grid{
  position:absolute;inset:0;opacity:.5;
  background-image:linear-gradient(rgba(255,255,255,.03) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px);
  background-size:48px 48px;
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.9),transparent 80%);
  mask-image:linear-gradient(180deg,rgba(0,0,0,.9),transparent 80%);
}
.hero-glow{
  position:absolute;right:-120px;top:40px;width:620px;height:620px;
  background:radial-gradient(circle,rgba(47,107,255,.18) 0%,rgba(47,107,255,0) 68%);
  filter:blur(120px);pointer-events:none;
}
.hero-slash{
  position:absolute;left:-10%;top:32%;width:120%;height:1px;
  background:linear-gradient(90deg,transparent,rgba(23,195,178,.35),transparent);
  transform:rotate(-8deg);pointer-events:none;
}
.hero-inner{position:relative;z-index:2;padding-bottom:56px;}
@media(min-width:1024px){
  .hero{min-height:620px;padding-top:172px;}
  .hero-inner{padding-bottom:80px;}
}
.hero-badges{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:22px;}
.hero-badge{
  display:inline-flex;align-items:center;gap:7px;
  height:28px;padding:0 12px;border-radius:var(--r-badge);
  font-size:13px;color:var(--brand-300);
  border:1px solid rgba(127,166,255,.35);background:rgba(47,107,255,.08);
}
.hero-badge b{color:var(--accent);font-weight:600;}
.hero h1{font-size:28px;line-height:1.3;}
@media(min-width:768px){.hero h1{font-size:32px;}}
@media(min-width:1024px){.hero h1{font-size:44px;line-height:1.25;}}
.hero-sub{color:var(--text-2);font-size:16px;margin-top:18px;max-width:560px;}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px;}
.hero-steps{display:flex;flex-wrap:wrap;gap:20px;margin-top:40px;padding-top:26px;border-top:1px solid var(--line);}
.hero-step{display:flex;align-items:center;gap:10px;font-size:14px;color:var(--text-2);}
.hero-step b{
  color:var(--brand-300);font-weight:700;font-size:13px;
  border-bottom:2px solid rgba(255,176,32,.55);padding-bottom:1px;
}
.info-card{
  position:relative;border-radius:var(--r-card-lg);
  border:1px solid var(--line-strong);
  background:rgba(12,19,34,.55);
  -webkit-backdrop-filter:blur(16px);
  backdrop-filter:blur(16px);
  box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.05);
  overflow:hidden;
}
.info-card-bg{position:absolute;inset:0;opacity:.4;}
.info-card-bg img{width:100%;height:100%;object-fit:cover;}
.info-card-bg::after{content:"";position:absolute;inset:0;background:linear-gradient(135deg,rgba(7,11,20,.6),rgba(7,11,20,.92));}
.info-card-body{position:relative;z-index:2;padding:26px 24px;}
.info-card h3{font-size:18px;margin-bottom:6px;}
.info-card .card-note{color:var(--text-3);font-size:13px;margin-bottom:20px;}
.info-rows{display:flex;flex-direction:column;gap:1px;background:var(--line);border-radius:12px;overflow:hidden;border:1px solid var(--line);}
.info-row{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 16px;background:rgba(7,11,20,.72);font-size:15px;}
.info-row dt{color:var(--text-3);font-size:14px;}
.info-row dd{margin:0;color:var(--text-1);font-weight:600;}
.info-card .btn{width:100%;margin-top:20px;}

.quickbar{border-top:1px solid var(--line);position:relative;z-index:2;background:var(--bg-0);}
.quickbar-grid{display:grid;grid-template-columns:1fr;gap:1px;background:var(--line);}
@media(min-width:640px){.quickbar-grid{grid-template-columns:repeat(2,1fr);}}
@media(min-width:1024px){.quickbar-grid{grid-template-columns:repeat(4,1fr);}}
.quick-item{background:var(--bg-0);padding:26px 22px;}
.quick-item .q-label{font-size:13px;color:var(--accent);letter-spacing:.06em;margin-bottom:8px;}
.quick-item .q-text{font-size:15px;color:var(--text-2);margin:0;}

/* 三步 */
.steps{display:grid;grid-template-columns:1fr;gap:24px;}
@media(min-width:768px){.steps{grid-template-columns:repeat(3,1fr);gap:20px;}}
.step{position:relative;padding:26px 22px;border-radius:var(--r-card);background:var(--bg-2);border:1px solid var(--line);box-shadow:inset 0 1px 0 rgba(255,255,255,.05);transition:transform .2s var(--ease),border-color .2s var(--ease);}
.step:hover{transform:translateY(-2px);border-color:rgba(47,107,255,.4);}
.step-ring{
  width:44px;height:44px;border-radius:50%;
  border:1px solid rgba(23,195,178,.6);color:var(--accent);
  display:flex;align-items:center;justify-content:center;
  font-size:15px;font-weight:700;margin-bottom:18px;
}
.step h3{font-size:19px;margin-bottom:10px;}
.step p{color:var(--text-2);font-size:15px;margin:0;}
@media(min-width:768px){
  .steps{position:relative;}
  .steps::before{
    content:"";position:absolute;top:44px;left:8%;right:8%;height:1px;
    background-image:linear-gradient(90deg,rgba(23,195,178,.5) 0 8px,transparent 8px 16px);
    background-size:16px 1px;z-index:0;
  }
  .step{z-index:1;background:var(--bg-1);}
}

/* 案例不等宽网格 */
.case-grid{display:grid;grid-template-columns:1fr;gap:24px;}
@media(min-width:1024px){
  .case-grid{grid-template-columns:repeat(3,1fr);grid-template-rows:auto auto;}
  .case-main{grid-column:span 2;grid-row:span 2;}
}
.case-card{
  border-radius:var(--r-card-lg);border:1px solid var(--line);background:var(--bg-1);
  overflow:hidden;box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.05);
  display:flex;flex-direction:column;
  transition:transform .2s var(--ease),border-color .2s var(--ease);
}
.case-card:hover{transform:translateY(-2px);border-color:rgba(47,107,255,.4);}
.case-media{aspect-ratio:16/10;overflow:hidden;background:var(--bg-2);}
.case-main .case-media{aspect-ratio:16/9;}
.case-media img{width:100%;height:100%;object-fit:cover;transition:transform .3s var(--ease);}
.case-card:hover .case-media img{transform:scale(1.03);}
.case-body{padding:24px 22px;}
.case-card h3{font-size:19px;margin-bottom:12px;}
.case-figure{font-size:30px;font-weight:700;color:var(--brand-300);margin-bottom:8px;text-shadow:0 0 26px rgba(47,107,255,.55);}
.case-card p{color:var(--text-2);font-size:15px;margin:0;}

/* CMS 列表卡 */
.post-grid{display:grid;grid-template-columns:1fr;gap:24px;}
@media(min-width:768px){.post-grid{grid-template-columns:repeat(2,1fr);}}
.post-card{
  display:flex;flex-direction:column;border-radius:var(--r-card);
  background:var(--bg-1);border:1px solid var(--line);
  overflow:hidden;box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.05);
  transition:transform .2s var(--ease),border-color .2s var(--ease);
}
.post-card:hover{transform:translateY(-2px);border-color:rgba(47,107,255,.4);color:var(--text-1);}
.post-media{aspect-ratio:16/10;background:var(--bg-2);overflow:hidden;}
.post-media img{width:100%;height:100%;object-fit:cover;}
.post-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1;}
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;
  border-radius:var(--r-badge);font-size:13px;line-height:1;width:fit-content;
}
.badge-accent{color:var(--accent);border:1px solid rgba(23,195,178,.45);background:rgba(23,195,178,.08);}
.badge-neutral{color:var(--text-3);border:1px solid var(--line-strong);}
.post-title{
  font-size:18px;font-weight:600;line-height:1.5;color:var(--text-1);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  margin:0;
}
.post-sum{
  color:var(--text-2);font-size:15px;line-height:1.75;margin:0;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post-meta{display:flex;align-items:center;gap:12px;font-size:13px;color:var(--text-3);margin-top:auto;}
.empty-state{
  border:1px dashed var(--line-strong);border-radius:var(--r-card);
  padding:48px 24px;text-align:center;color:var(--text-2);background:var(--bg-0);
}
.empty-state p{margin-bottom:18px;}

/* FAQ */
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:900px;}
.faq-item{
  border-radius:var(--r-card);border:1px solid var(--line);
  background:rgba(12,19,34,.6);
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  overflow:hidden;transition:border-color .2s var(--ease);
}
.faq-item[open]{border-color:rgba(47,107,255,.4);}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 20px;font-size:16px;font-weight:600;color:var(--text-1);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-arrow{color:var(--accent);font-size:18px;line-height:1;transition:transform .2s var(--ease);flex:0 0 auto;}
.faq-item[open] .faq-arrow{transform:rotate(180deg);}
.faq-body{padding:0 20px 20px;color:var(--text-2);font-size:15px;line-height:1.8;}

/* CTA 带 */
.cta-band{
  position:relative;overflow:hidden;
  border-top:1px solid rgba(47,107,255,.28);
  border-bottom:1px solid rgba(47,107,255,.22);
  background:linear-gradient(180deg,rgba(47,107,255,.12),rgba(47,107,255,.06));
}
.cta-band::before,.cta-band::after{
  content:"";position:absolute;top:0;bottom:0;width:220px;pointer-events:none;
  background:radial-gradient(circle at center,rgba(47,107,255,.4),transparent 70%);
  filter:blur(60px);
}
.cta-band::before{left:-80px;}
.cta-band::after{right:-80px;}
.cta-inner{
  position:relative;z-index:2;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:24px;
  padding:48px 0;
}
@media(min-width:1024px){.cta-inner{padding:60px 0;}}
.cta-inner h2{font-size:24px;}
@media(min-width:768px){.cta-inner h2{font-size:28px;}}
.cta-inner p{color:var(--text-2);font-size:15px;margin:10px 0 0;}

/* 页脚 */
.site-footer{background:var(--bg-1);border-top:1px solid var(--line);}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px;padding:56px 0 36px;}
@media(min-width:640px){.footer-grid{grid-template-columns:repeat(2,1fr);}}
@media(min-width:1024px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;}}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:16px;font-weight:700;color:var(--text-1);margin-bottom:14px;}
.footer-desc{color:var(--text-3);font-size:13px;margin:0 0 14px;}
.footer-status{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--text-3);}
.footer-status i{width:7px;height:7px;border-radius:50%;background:var(--accent);box-shadow:0 0 10px rgba(23,195,178,.9);display:block;}
.footer-col h4{font-size:14px;color:var(--text-1);margin-bottom:16px;}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col a,.footer-col span{font-size:13px;color:var(--text-3);}
.footer-col a:hover{color:var(--accent);}
.footer-bottom{border-top:1px solid var(--line);padding:20px 0 28px;display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;font-size:12px;color:var(--text-3);}
.footer-bottom p{margin:0;}

@media (prefers-reduced-motion: reduce){
  *{animation:none !important;transition:none !important;scroll-behavior:auto !important;}
}
@media (max-width:767px){
  .info-card{-webkit-backdrop-filter:none;backdrop-filter:none;background:rgba(12,19,34,.92);}
  .faq-item{-webkit-backdrop-filter:none;backdrop-filter:none;}
}

/* roulang page: article */
:root{
  --bg-0:#070B14;
  --bg-1:#0C1322;
  --bg-2:#131C31;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --brand:#2F6BFF;
  --brand-600:#2358E0;
  --brand-300:#7FA6FF;
  --accent:#17C3B2;
  --warm:#FFB020;
  --text-1:#E8EDF7;
  --text-2:#A7B3C9;
  --text-3:#6B7893;
  --r-card:16px;
  --r-card-lg:20px;
  --r-btn:12px;
  --r-badge:6px;
  --shadow-card:0 20px 40px -24px rgba(0,0,0,.85), inset 0 1px 0 rgba(255,255,255,.05);
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--text-1);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.85;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  background-image:linear-gradient(rgba(255,255,255,.03) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px);
  background-size:64px 64px;
  pointer-events:none;
  z-index:0;
}
img{max-width:100%;display:block;border-style:none;}
a{color:var(--text-2);text-decoration:none;transition:color .2s var(--ease);}
a:hover{color:var(--accent);}
button{font:inherit;color:inherit;}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px;}
.container-x{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 20px;
  position:relative;
  z-index:1;
}
@media (min-width:768px){.container-x{padding:0 24px;}}
@media (min-width:1024px){.container-x{padding:0 32px;}}
.num{font-variant-numeric:tabular-nums;}

/* ---------- 悬浮胶囊导航 ---------- */
.nav-shell{
  position:fixed;
  top:12px;
  left:50%;
  transform:translateX(-50%);
  width:min(1120px,calc(100% - 32px));
  z-index:90;
  border-radius:999px;
  background:rgba(9,14,26,.72);
  -webkit-backdrop-filter:blur(20px);
  backdrop-filter:blur(20px);
  border:1px solid rgba(255,255,255,.10);
  box-shadow:0 14px 34px -26px rgba(0,0,0,.9), inset 0 1px 0 rgba(255,255,255,.06);
  transition:background .2s var(--ease),box-shadow .2s var(--ease);
}
.nav-shell.is-stuck{background:rgba(9,14,26,.92);box-shadow:0 22px 44px -26px rgba(0,0,0,.95);}
.nav-inner{
  height:64px;
  display:flex;
  align-items:center;
  gap:14px;
  padding:0 12px 0 20px;
}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  color:var(--text-1);
  font-size:15px;
  font-weight:600;
  white-space:nowrap;
  letter-spacing:.01em;
}
.brand:hover{color:var(--text-1);}
.brand-mark{
  width:26px;height:26px;
  border-radius:9px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  background:linear-gradient(160deg,#3B7BFF,#1B41A6);
  border:1px solid rgba(255,255,255,.18);
  box-shadow:0 6px 18px -8px rgba(47,107,255,.9);
  flex:none;
}
.brand-mark span{
  width:9px;height:9px;border-radius:3px;
  background:var(--accent);
  box-shadow:0 0 10px rgba(23,195,178,.8);
}
.nav-links{
  display:flex;
  align-items:center;
  gap:6px;
  margin-left:auto;
}
.nav-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  height:40px;
  padding:0 14px;
  border-radius:999px;
  font-size:14.5px;
  color:var(--text-2);
  transition:color .2s var(--ease),background .2s var(--ease);
}
.nav-link::after{
  content:"";
  position:absolute;
  left:50%;
  bottom:5px;
  width:0;
  height:2px;
  background:var(--accent);
  border-radius:2px;
  transform:translateX(-50%);
  transition:width .2s var(--ease);
}
.nav-link:hover{color:var(--text-1);}
.nav-link:hover::after{width:60%;}
.nav-link.is-active{
  color:var(--brand-300);
  background:rgba(47,107,255,.10);
}
.nav-link.is-active::after{width:0;}
.nav-actions{display:flex;align-items:center;gap:8px;margin-left:12px;}
.nav-cta{
  display:inline-flex;
  align-items:center;
  height:40px;
  padding:0 20px;
  border-radius:999px;
  font-size:14.5px;
  font-weight:600;
  color:#fff;
  background:linear-gradient(180deg,#3B7BFF,#2358E0);
  border:1px solid rgba(255,255,255,.14);
  box-shadow:0 8px 30px -12px rgba(47,107,255,.75);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),filter .2s var(--ease);
}
.nav-cta:hover{
  color:#fff;
  transform:translateY(-1px);
  filter:brightness(1.06);
  box-shadow:0 12px 34px -10px rgba(47,107,255,.9);
}
.nav-cta:active{transform:translateY(1px);box-shadow:0 6px 18px -12px rgba(47,107,255,.7);}
.nav-toggle{
  display:none;
  width:40px;height:40px;
  align-items:center;
  justify-content:center;
  border-radius:999px;
  background:transparent;
  border:1px solid var(--line-strong);
  cursor:pointer;
}
.nav-toggle span{
  position:relative;
  display:block;
  width:16px;height:2px;
  border-radius:2px;
  background:var(--text-1);
}
.nav-toggle span::before,
.nav-toggle span::after{
  content:"";
  position:absolute;
  left:0;
  width:16px;height:2px;
  border-radius:2px;
  background:var(--text-1);
  transition:transform .2s var(--ease);
}
.nav-toggle span::before{top:-5px;}
.nav-toggle span::after{top:5px;}
.nav-shell.is-open .nav-toggle span{background:transparent;}
.nav-shell.is-open .nav-toggle span::before{transform:translateY(5px) rotate(45deg);}
.nav-shell.is-open .nav-toggle span::after{transform:translateY(-5px) rotate(-45deg);}

@media (max-width:900px){
  .nav-inner{padding:0 10px 0 16px;gap:10px;}
  .brand{font-size:14px;}
  .nav-toggle{display:inline-flex;margin-left:auto;}
  .nav-actions{margin-left:0;}
  .nav-cta{height:38px;padding:0 16px;font-size:14px;}
  .nav-links{
    display:none;
    position:absolute;
    top:calc(100% + 10px);
    left:0;right:0;
    margin:0;
    flex-direction:column;
    align-items:stretch;
    gap:4px;
    padding:10px;
    border-radius:18px;
    background:var(--bg-1);
    border:1px solid var(--line);
    box-shadow:0 26px 50px -30px rgba(0,0,0,.95);
  }
  .nav-shell.is-open .nav-links{display:flex;}
  .nav-link{height:52px;padding:0 16px;border-radius:12px;font-size:15px;}
  .nav-link::after{display:none;}
}

/* ---------- 页面主体骨架 ---------- */
.page-main{padding-top:112px;position:relative;z-index:1;}
.page-main::before{
  content:"";
  position:absolute;
  top:-60px;right:-120px;
  width:520px;height:520px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(47,107,255,.20),rgba(47,107,255,0) 68%);
  filter:blur(120px);
  pointer-events:none;
  z-index:0;
}
.crumbs{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:8px;
  font-size:13px;
  color:var(--text-3);
  margin-bottom:22px;
}
.crumbs a{color:var(--text-3);}
.crumbs a:hover{color:var(--accent);}
.crumbs .dot{width:4px;height:4px;border-radius:50%;background:var(--brand);opacity:.8;flex:none;}
.crumbs .now{color:var(--text-2);}

.article-layout{
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:40px;
  align-items:start;
}
@media (min-width:1024px){
  .article-layout{grid-template-columns:minmax(0,760px) 200px;gap:56px;justify-content:center;}
}

.badge{
  display:inline-flex;
  align-items:center;
  height:24px;
  padding:0 10px;
  border-radius:var(--r-badge);
  font-size:13px;
  line-height:1;
  border:1px solid var(--line);
  color:var(--text-2);
  background:rgba(255,255,255,.02);
}
.badge-cyan{border-color:rgba(23,195,178,.55);color:var(--accent);background:rgba(23,195,178,.07);}

.head-badges{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px;}
.article-title{
  font-size:28px;
  line-height:1.3;
  font-weight:700;
  letter-spacing:-.01em;
  color:var(--text-1);
}
@media (min-width:768px){.article-title{font-size:36px;}}
@media (min-width:1024px){.article-title{font-size:42px;line-height:1.25;}}
.meta-row{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px 14px;
  margin-top:18px;
  font-size:13px;
  color:var(--text-3);
}
.meta-row .sep{width:4px;height:4px;border-radius:50%;background:var(--line-strong);}
.cover-wrap{
  margin-top:28px;
  border-radius:var(--r-card-lg);
  overflow:hidden;
  border:1px solid var(--line);
  background:var(--bg-2);
  box-shadow:var(--shadow-card);
}
.cover-wrap img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.figure-cap{
  margin-top:10px;
  font-size:13px;
  color:var(--text-3);
  text-align:center;
}

/* ---------- 正文排版 ---------- */
.article-body{
  margin-top:34px;
  font-size:16px;
  line-height:1.9;
  color:#D5DEED;
  overflow-wrap:break-word;
}
@media (max-width:768px){.article-body{font-size:15px;}}
.article-body p{margin:0 0 1.25em;}
.article-body h2{
  position:relative;
  font-size:24px;
  line-height:1.35;
  font-weight:700;
  color:var(--text-1);
  margin:48px 0 16px;
  padding-left:14px;
  letter-spacing:-.01em;
}
.article-body h2::before{
  content:"";
  position:absolute;
  left:0;top:.28em;
  width:3px;height:1.05em;
  border-radius:2px;
  background:linear-gradient(180deg,#3B7BFF,#2358E0);
  box-shadow:0 0 12px rgba(47,107,255,.6);
}
@media (min-width:768px){.article-body h2{font-size:28px;}}
.article-body h3{
  font-size:20px;
  font-weight:600;
  color:var(--text-1);
  margin:32px 0 12px;
}
.article-body h4{font-size:17px;font-weight:600;color:var(--text-1);margin:24px 0 10px;}
.article-body a{color:var(--brand-300);border-bottom:1px solid rgba(127,166,255,.35);}
.article-body a:hover{color:var(--accent);border-bottom-color:rgba(23,195,178,.6);}
.article-body strong{color:#FFFFFF;font-weight:600;}
.article-body ul,
.article-body ol{margin:0 0 1.25em;padding-left:2px;}
.article-body ul li{
  position:relative;
  padding-left:20px;
  margin:0 0 .6em;
}
.article-body ul li::before{
  content:"";
  position:absolute;
  left:0;top:.72em;
  width:7px;height:7px;
  border-radius:2px;
  background:var(--accent);
  box-shadow:0 0 8px rgba(23,195,178,.55);
}
.article-body ol{counter-reset:li;padding-left:0;}
.article-body ol li{
  position:relative;
  counter-increment:li;
  padding-left:32px;
  margin:0 0 .6em;
}
.article-body ol li::before{
  content:counter(li,decimal-leading-zero);
  position:absolute;
  left:0;top:.2em;
  font-size:13px;
  font-weight:700;
  color:var(--accent);
  letter-spacing:.03em;
  font-variant-numeric:tabular-nums;
}
.article-body blockquote{
  margin:24px 0;
  padding:16px 20px;
  border-left:3px solid var(--brand);
  background:rgba(47,107,255,.06);
  border-radius:0 12px 12px 0;
  color:var(--text-2);
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{
  border-radius:12px;
  margin:24px auto;
  box-shadow:var(--shadow-card);
}
.article-body figure{margin:24px 0;}
.article-body figcaption{
  margin-top:10px;
  font-size:13px;
  color:var(--text-3);
  text-align:center;
}
.article-body table{
  width:100%;
  min-width:520px;
  border-collapse:collapse;
  font-size:15px;
  background:var(--bg-1);
}
.article-body .table-scroll,
.article-body>table{display:block;overflow-x:auto;}
.article-body th,
.article-body td{
  border:1px solid var(--line);
  padding:10px 14px;
  text-align:left;
  color:var(--text-2);
}
.article-body th{background:var(--bg-2);color:var(--text-1);font-weight:600;white-space:nowrap;}
.article-body hr{border:0;border-top:1px solid var(--line);margin:36px 0;}
.article-body code{
  background:var(--bg-2);
  border:1px solid var(--line);
  border-radius:6px;
  padding:2px 6px;
  font-size:14px;
  color:var(--brand-300);
}

/* ---------- 标签 / 返回 / 翻页 ---------- */
.tag-row{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  margin-top:40px;
  padding-top:22px;
  border-top:1px solid var(--line);
}
.tag-row .label{font-size:13px;color:var(--text-3);}
.back-row{margin-top:22px;}
.text-btn{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:15px;
  color:var(--accent);
  transition:color .2s var(--ease);
}
.text-btn:hover{color:#3FE0CE;text-decoration:underline;text-underline-offset:4px;}
.pager{
  display:grid;
  grid-template-columns:1fr;
  gap:12px;
  margin-top:28px;
}
@media (min-width:640px){.pager{grid-template-columns:1fr 1fr;}}
.pager-card{
  display:block;
  padding:16px 18px;
  border-radius:var(--r-card);
  background:var(--bg-1);
  border:1px solid var(--line);
  box-shadow:var(--shadow-card);
  transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.pager-card:hover{
  transform:translateY(-2px);
  border-color:rgba(47,107,255,.4);
  color:var(--text-1);
}
.pager-card .k{font-size:12px;color:var(--text-3);letter-spacing:.04em;}
.pager-card .v{margin-top:6px;font-size:15px;font-weight:600;color:var(--text-1);line-height:1.6;}

/* ---------- 侧栏 ---------- */
.side{display:flex;flex-direction:column;gap:20px;}
@media (min-width:1024px){
  .side{position:sticky;top:96px;}
}
.side-title{
  font-size:13px;
  letter-spacing:.12em;
  color:var(--text-3);
  margin-bottom:14px;
}
.hot-list{display:flex;flex-direction:column;}
.hot-list li{border-top:1px solid var(--line);}
.hot-list li:first-child{border-top:0;}
.hot-list a{
  display:block;
  padding:11px 0;
  font-size:14px;
  line-height:1.6;
  color:var(--text-2);
}
.hot-list a:hover{color:var(--accent);}
.side-cta{
  padding:20px;
  border-radius:var(--r-card);
  background:rgba(19,28,49,.66);
  -webkit-backdrop-filter:blur(16px);
  backdrop-filter:blur(16px);
  border:1px solid var(--line-strong);
  box-shadow:var(--shadow-card), inset 0 1px 0 rgba(255,255,255,.06);
}
.side-cta h3{font-size:16px;font-weight:600;color:var(--text-1);}
.side-cta p{margin-top:8px;font-size:13.5px;line-height:1.75;color:var(--text-2);}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 24px;
  border-radius:var(--r-btn);
  font-size:15px;
  font-weight:600;
  cursor:pointer;
  border:1px solid transparent;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),filter .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
}
.btn-primary{
  color:#fff;
  background:linear-gradient(180deg,#3B7BFF,#2358E0);
  border-color:rgba(255,255,255,.16);
  box-shadow:0 0 0 1px rgba(47,107,255,.35) inset, 0 8px 30px -8px rgba(47,107,255,.55);
}
.btn-primary:hover{
  color:#fff;
  transform:translateY(-1px);
  filter:brightness(1.06);
  box-shadow:0 0 0 1px rgba(47,107,255,.5) inset, 0 14px 38px -8px rgba(47,107,255,.8);
}
.btn-primary:active{
  transform:translateY(1px);
  filter:brightness(.98);
  box-shadow:0 0 0 1px rgba(47,107,255,.4) inset, 0 4px 14px -10px rgba(47,107,255,.6);
}
.btn-ghost{
  color:var(--text-1);
  background:transparent;
  border-color:var(--line-strong);
}
.btn-ghost:hover{color:#fff;border-color:rgba(47,107,255,.6);transform:translateY(-1px);}
.btn-ghost:active{transform:translateY(1px);}
.side-cta .btn{width:100%;margin-top:16px;height:44px;font-size:14.5px;}

/* ---------- 相关推荐 ---------- */
.section{margin-top:96px;}
@media (max-width:1023px){.section{margin-top:72px;}}
@media (max-width:640px){.section{margin-top:56px;}}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:16px;
  margin-bottom:28px;
}
.section-head h2{
  font-size:26px;
  font-weight:700;
  letter-spacing:-.01em;
  color:var(--text-1);
}
@media (min-width:768px){.section-head h2{font-size:30px;}}
.section-head .sub{
  margin-top:8px;
  font-size:15px;
  color:var(--text-2);
  max-width:640px;
}
.rel-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:16px;
}
@media (min-width:640px){.rel-grid{grid-template-columns:repeat(2,minmax(0,1fr));}}
@media (min-width:1024px){.rel-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}}
.card{
  display:block;
  border-radius:var(--r-card);
  background:var(--bg-1);
  border:1px solid var(--line);
  box-shadow:var(--shadow-card);
  overflow:hidden;
  transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.card:hover{
  transform:translateY(-2px);
  border-color:rgba(47,107,255,.4);
  box-shadow:0 26px 46px -26px rgba(0,0,0,.9), inset 0 1px 0 rgba(255,255,255,.07);
  color:inherit;
}
.card-cover{
  aspect-ratio:16/10;
  background:var(--bg-2);
  overflow:hidden;
}
.card-cover img{width:100%;height:100%;object-fit:cover;}
.card-body{padding:16px 18px 20px;}
.card-body h3{
  font-size:17px;
  font-weight:600;
  line-height:1.55;
  color:var(--text-1);
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.card-body p{
  margin-top:8px;
  font-size:14.5px;
  line-height:1.75;
  color:var(--text-2);
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.card-meta{
  display:flex;
  align-items:center;
  gap:10px;
  margin-top:14px;
  font-size:13px;
  color:var(--text-3);
}

/* ---------- 空态 ---------- */
.empty-state{
  margin-top:8px;
  padding:46px 24px;
  text-align:center;
  border-radius:var(--r-card);
  border:1px dashed var(--line-strong);
  background:rgba(12,19,34,.6);
}
.empty-state h3{font-size:19px;font-weight:600;color:var(--text-1);}
.empty-state p{margin-top:10px;font-size:15px;color:var(--text-2);}
.empty-state .btn{margin-top:20px;}

/* ---------- CTA 带 ---------- */
.cta-band{
  position:relative;
  margin-top:96px;
  padding:48px 0;
  background:linear-gradient(180deg,rgba(47,107,255,.12),rgba(47,107,255,.04));
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.cta-band::before,
.cta-band::after{
  content:"";
  position:absolute;
  top:50%;
  width:260px;height:260px;
  border-radius:50%;
  transform:translateY(-50%);
  background:radial-gradient(circle,rgba(47,107,255,.35),rgba(47,107,255,0) 70%);
  filter:blur(60px);
  pointer-events:none;
}
.cta-band::before{left:-120px;}
.cta-band::after{right:-120px;}
.cta-band .container-x{
  display:flex;
  flex-direction:column;
  gap:22px;
  align-items:flex-start;
  justify-content:space-between;
}
@media (min-width:768px){.cta-band .container-x{flex-direction:row;align-items:center;}}
.cta-band h2{font-size:24px;font-weight:700;letter-spacing:-.01em;color:var(--text-1);}
@media (min-width:768px){.cta-band h2{font-size:28px;}}
.cta-band p{margin-top:10px;font-size:15px;color:var(--text-2);max-width:520px;}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:0;
  background:var(--bg-1);
  border-top:1px solid var(--line);
  padding:64px 0 28px;
  position:relative;
  z-index:1;
}
.footer-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:32px;
}
@media (min-width:640px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;}}
.footer-brand{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:15px;
  font-weight:600;
  color:var(--text-1);
}
.footer-desc{
  margin-top:12px;
  font-size:13px;
  line-height:1.8;
  color:var(--text-3);
  max-width:260px;
}
.footer-status{
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin-top:14px;
  font-size:12.5px;
  color:var(--text-3);
}
.footer-status i{
  width:7px;height:7px;
  border-radius:50%;
  background:var(--warm);
  box-shadow:0 0 10px rgba(255,176,32,.8);
  font-style:normal;
}
.footer-col h4{
  font-size:13px;
  font-weight:600;
  color:var(--text-2);
  letter-spacing:.06em;
  margin-bottom:14px;
}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col a,
.footer-col span{
  font-size:13px;
  color:var(--text-3);
  line-height:1.7;
}
.footer-col a:hover{color:var(--accent);}
.footer-bottom{
  margin-top:48px;
  padding-top:20px;
  border-top:1px solid var(--line);
  display:flex;
  flex-direction:column;
  gap:8px;
  justify-content:space-between;
  font-size:12.5px;
  color:var(--text-3);
}
@media (min-width:768px){.footer-bottom{flex-direction:row;align-items:center;}}

@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important;scroll-behavior:auto !important;}
}

/* roulang page: category1 */
:root{
  --bg-0:#070B14;
  --bg-1:#0C1322;
  --bg-2:#131C31;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --brand:#2F6BFF;
  --brand-600:#2358E0;
  --brand-300:#7FA6FF;
  --accent:#17C3B2;
  --warm:#FFB020;
  --text-1:#E8EDF7;
  --text-2:#A7B3C9;
  --text-3:#6B7893;
  --r-card:16px;
  --r-card-lg:20px;
  --r-btn:12px;
  --r-badge:6px;
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--text-1);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:var(--text-2);text-decoration:none;transition:color .2s var(--ease);}
a:hover{color:var(--accent);}
button{font-family:inherit;}
h1,h2,h3,h4,p,ul,ol{margin:0;}
ul{list-style:none;padding:0;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px;}
::selection{background:rgba(47,107,255,.35);color:#fff;}
::-webkit-scrollbar{width:10px;height:10px;}
::-webkit-scrollbar-track{background:var(--bg-0);}
::-webkit-scrollbar-thumb{background:#1E2942;border-radius:999px;border:2px solid var(--bg-0);}
::-webkit-scrollbar-thumb:hover{background:#2B3A5C;}

.container-x{width:100%;max-width:1200px;margin:0 auto;padding:0 20px;}
@media (min-width:768px){.container-x{padding:0 24px;}}
@media (min-width:1024px){.container-x{padding:0 32px;}}

.num{font-variant-numeric:tabular-nums;}

/* ---------- 悬浮胶囊导航 ---------- */
.nav-shell{
  position:absolute;top:20px;left:50%;transform:translateX(-50%);
  width:min(1120px,calc(100% - 32px));
  z-index:80;
  border-radius:999px;
  background:rgba(9,14,26,.72);
  -webkit-backdrop-filter:blur(18px);
  backdrop-filter:blur(18px);
  border:1px solid rgba(255,255,255,.10);
  box-shadow:0 1px 0 rgba(255,255,255,.06) inset;
  transition:top .2s var(--ease),background .2s var(--ease),box-shadow .2s var(--ease);
}
.nav-shell.is-stuck{
  position:fixed;top:12px;
  background:rgba(9,14,26,.9);
  box-shadow:0 18px 44px -26px rgba(0,0,0,.95),0 1px 0 rgba(255,255,255,.06) inset;
}
.nav-inner{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  height:64px;padding:0 12px 0 18px;
}
.brand{
  display:flex;align-items:center;gap:10px;
  color:var(--text-1);font-weight:600;font-size:15px;letter-spacing:-.01em;
  white-space:nowrap;
}
.brand:hover{color:var(--text-1);}
.brand-mark{
  width:28px;height:28px;flex:0 0 28px;border-radius:9px;
  background:linear-gradient(180deg,#3B7BFF,#2358E0);
  display:grid;place-items:center;
  box-shadow:0 6px 18px -8px rgba(47,107,255,.9),inset 0 1px 0 rgba(255,255,255,.35);
}
.brand-mark span{width:10px;height:10px;border-radius:3px;background:var(--accent);display:block;}
.nav-links{display:flex;align-items:center;gap:4px;}
.nav-link{
  position:relative;
  display:inline-flex;align-items:center;height:38px;padding:0 12px;
  font-size:14px;color:var(--text-2);border-radius:999px;
  transition:color .2s var(--ease),background .2s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:20%;right:20%;bottom:4px;height:2px;
  background:var(--accent);border-radius:2px;
  transform:scaleX(0);transform-origin:center;
  transition:transform .2s var(--ease);
}
.nav-link:hover{color:var(--text-1);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.is-active{color:var(--brand-300);background:rgba(47,107,255,.10);}
.nav-link.is-active::after{transform:scaleX(0);}
.nav-actions{display:flex;align-items:center;gap:8px;}
.nav-cta{
  display:inline-flex;align-items:center;height:40px;padding:0 18px;
  font-size:14px;font-weight:600;color:#fff;
  border-radius:999px;
  background:linear-gradient(180deg,#3B7BFF,#2358E0);
  border:1px solid rgba(127,166,255,.5);
  box-shadow:0 8px 24px -10px rgba(47,107,255,.85);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),filter .2s var(--ease);
}
.nav-cta:hover{color:#fff;transform:translateY(-1px);filter:brightness(1.06);box-shadow:0 12px 30px -10px rgba(47,107,255,1);}
.nav-cta:active{transform:translateY(1px);box-shadow:0 6px 14px -8px rgba(47,107,255,.7);}
.nav-toggle{
  display:none;width:40px;height:40px;border-radius:999px;
  background:transparent;border:1px solid var(--line-strong);
  cursor:pointer;position:relative;
}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{
  position:absolute;left:50%;width:16px;height:2px;background:var(--text-1);
  border-radius:2px;transition:transform .2s var(--ease),opacity .2s var(--ease);
}
.nav-toggle span{top:50%;transform:translate(-50%,-50%);}
.nav-toggle span::before{content:"";top:-6px;left:0;transform:translateX(0);}
.nav-toggle span::after{content:"";top:6px;left:0;transform:translateX(0);}
.nav-shell.is-open .nav-toggle span{background:transparent;}
.nav-shell.is-open .nav-toggle span::before{transform:rotate(45deg) translateY(6px);}
.nav-shell.is-open .nav-toggle span::after{transform:rotate(-45deg) translateY(-6px);}

@media (max-width:1023px){
  .nav-toggle{display:block;}
  .nav-shell{border-radius:24px;}
  .nav-shell.is-open{border-radius:24px;}
  .nav-links{
    position:absolute;top:calc(100% + 10px);left:0;right:0;
    flex-direction:column;align-items:stretch;gap:4px;
    padding:10px;
    background:var(--bg-1);
    border:1px solid var(--line-strong);
    border-radius:20px;
    box-shadow:0 26px 50px -22px rgba(0,0,0,.95);
    display:none;
  }
  .nav-shell.is-open .nav-links{display:flex;}
  .nav-link{height:52px;padding:0 16px;border-radius:14px;font-size:15px;}
  .nav-link::after{display:none;}
  .nav-link.is-active{background:rgba(47,107,255,.14);}
  .nav-inner{padding:0 10px 0 14px;}
  .brand{font-size:14px;}
  .nav-actions .nav-cta{display:none;}
}
@media (max-width:520px){
  .brand{font-size:13px;}
  .brand-mark{width:26px;height:26px;flex:0 0 26px;}
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;
  border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;
  border:1px solid transparent;cursor:pointer;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),filter .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease),background .2s var(--ease);
}
.btn-primary{
  color:#fff;
  background:linear-gradient(180deg,#3B7BFF,#2358E0);
  border-color:rgba(127,166,255,.45);
  box-shadow:0 10px 30px -12px rgba(47,107,255,.85),inset 0 1px 0 rgba(255,255,255,.28);
}
.btn-primary:hover{color:#fff;transform:translateY(-1px);filter:brightness(1.06);box-shadow:0 14px 38px -12px rgba(47,107,255,1);}
.btn-primary:active{transform:translateY(1px);box-shadow:inset 0 2px 10px rgba(0,0,0,.45);filter:brightness(.98);}
.btn-ghost{
  color:var(--text-1);background:transparent;
  border-color:var(--line-strong);
}
.btn-ghost:hover{color:#fff;border-color:rgba(47,107,255,.65);transform:translateY(-1px);}
.btn-ghost:active{transform:translateY(1px);}
.btn-sm{height:40px;padding:0 18px;font-size:14px;border-radius:10px;}

/* ---------- 分类 Hero ---------- */
.page-hero{
  position:relative;
  display:flex;align-items:center;
  min-height:320px;
  padding:132px 0 72px;
  overflow:hidden;
  border-bottom:1px solid var(--line);
}
.page-hero-bg{
  position:absolute;inset:0;
  background-size:cover;background-position:center;
  opacity:.42;
}
.page-hero-veil{
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(7,11,20,.78) 0%,rgba(7,11,20,.9) 55%,var(--bg-0) 100%);
}
.page-hero-glow{
  position:absolute;top:-160px;right:-120px;width:520px;height:520px;border-radius:50%;
  background:radial-gradient(circle,rgba(47,107,255,.35),transparent 68%);
  filter:blur(110px);opacity:.16;pointer-events:none;
}
.page-hero-inner{position:relative;z-index:2;max-width:820px;}
.crumbs{
  display:flex;align-items:center;flex-wrap:wrap;gap:8px;
  font-size:13px;color:var(--text-3);margin-bottom:18px;
}
.crumbs a{color:var(--text-3);}
.crumbs a:hover{color:var(--accent);}
.crumbs i{width:4px;height:4px;border-radius:50%;background:var(--brand);display:inline-block;}
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;
  border-radius:var(--r-badge);
  font-size:13px;line-height:1;font-weight:500;
}
.badge-accent{color:var(--accent);border:1px solid rgba(23,195,178,.45);background:rgba(23,195,178,.08);}
.badge-line{color:var(--text-2);border:1px solid var(--line-strong);background:rgba(255,255,255,.03);}
.badge-brand{color:var(--brand-300);border:1px solid rgba(47,107,255,.45);background:rgba(47,107,255,.10);}
h1.page-title{
  font-size:28px;font-weight:700;line-height:1.25;letter-spacing:-.01em;
  margin:16px 0 14px;
}
@media (min-width:768px){h1.page-title{font-size:34px;}}
@media (min-width:1024px){h1.page-title{font-size:40px;}}
.page-sub{
  font-size:16px;color:var(--text-2);max-width:640px;margin-bottom:26px;
}
@media (max-width:640px){
  .page-hero{padding:118px 0 56px;min-height:280px;}
  .page-sub{font-size:15px;}
}

/* ---------- 通用板块 ---------- */
.section{padding:56px 0;}
@media (min-width:768px){.section{padding:72px 0;}}
@media (min-width:1024px){.section{padding:96px 0;}}
.section-alt{background:var(--bg-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{margin-bottom:32px;max-width:760px;}
.section-head h2{
  font-size:24px;font-weight:700;line-height:1.32;letter-spacing:-.01em;margin-bottom:12px;
}
@media (min-width:768px){.section-head h2{font-size:28px;}}
.section-head p{font-size:15px;color:var(--text-2);}

/* ---------- 导语 ---------- */
.intro-block{max-width:800px;}
.intro-block p{font-size:15px;color:var(--text-2);margin-bottom:1.25em;}
.intro-block p:last-child{margin-bottom:0;}
.intro-block strong{color:var(--text-1);font-weight:600;}
.intro-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px;}

/* ---------- 左图右文卡片 ---------- */
.row-list{display:grid;gap:16px;}
.row-card{
  display:grid;grid-template-columns:1fr;gap:18px;
  padding:16px;
  background:var(--bg-1);
  border:1px solid var(--line);
  border-radius:var(--r-card-lg);
  box-shadow:0 20px 40px -24px rgba(0,0,0,.85),inset 0 1px 0 rgba(255,255,255,.05);
  transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.row-card:hover{
  transform:translateY(-2px);
  border-color:rgba(47,107,255,.4);
  box-shadow:0 24px 46px -24px rgba(0,0,0,.9),inset 0 1px 0 rgba(255,255,255,.09);
}
.row-media{
  position:relative;border-radius:14px;overflow:hidden;
  background:var(--bg-2);aspect-ratio:16/10;
}
.row-media img{width:100%;height:100%;object-fit:cover;}
.row-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(7,11,20,0) 45%,rgba(7,11,20,.55) 100%);
}
.row-body{display:flex;flex-direction:column;justify-content:center;padding:4px 8px 8px 4px;}
.row-body .row-top{display:flex;align-items:center;gap:10px;margin-bottom:10px;}
.step-pill{
  display:inline-flex;align-items:center;justify-content:center;
  width:30px;height:30px;border-radius:10px;
  font-size:13px;font-weight:700;color:var(--accent);
  border:1px solid rgba(23,195,178,.45);
  background:rgba(23,195,178,.08);
  font-variant-numeric:tabular-nums;
}
.row-body h3{font-size:19px;font-weight:600;line-height:1.4;margin-bottom:10px;}
.row-body p{font-size:15px;color:var(--text-2);margin-bottom:12px;}
.mini-list{display:grid;gap:8px;}
.mini-list li{
  position:relative;padding-left:18px;
  font-size:14px;color:var(--text-3);line-height:1.7;
}
.mini-list li::before{
  content:"";position:absolute;left:0;top:9px;
  width:7px;height:7px;border-radius:2px;
  background:var(--accent);opacity:.75;
}
@media (min-width:768px){
  .row-card{grid-template-columns:minmax(0,40%) minmax(0,1fr);gap:24px;padding:18px;align-items:stretch;}
  .row-media{aspect-ratio:auto;min-height:220px;height:100%;}
}

/* ---------- FAQ ---------- */
.faq-list{display:grid;gap:12px;max-width:900px;}
.faq-item{
  border-radius:var(--r-card);
  border:1px solid var(--line);
  background:rgba(9,14,26,.6);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  overflow:hidden;
  transition:border-color .2s var(--ease),background .2s var(--ease);
}
.faq-item:hover{border-color:rgba(47,107,255,.32);}
.faq-item[open]{border-color:rgba(47,107,255,.38);}
.faq-q{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 20px;
  font-size:16px;font-weight:600;color:var(--text-1);
  cursor:pointer;list-style:none;
}
.faq-q::-webkit-details-marker{display:none;}
.faq-q::after{
  content:"";flex:0 0 auto;
  width:9px;height:9px;margin-right:4px;
  border-right:2px solid var(--accent);border-bottom:2px solid var(--accent);
  transform:rotate(45deg);transition:transform .25s var(--ease);
}
.faq-item[open] .faq-q::after{transform:rotate(-135deg);}
.faq-a{padding:0 20px 20px;font-size:15px;color:var(--text-2);}

/* ---------- CTA 带 ---------- */
.cta-shell{padding:56px 0;}
@media (min-width:1024px){.cta-shell{padding:80px 0;}}
.cta-band{
  position:relative;overflow:hidden;
  display:flex;flex-direction:column;align-items:flex-start;gap:22px;
  min-height:200px;justify-content:center;
  padding:36px 28px;
  border-radius:24px;
  background:linear-gradient(100deg,rgba(47,107,255,.14),rgba(47,107,255,.05) 65%,rgba(23,195,178,.06));
  border:1px solid rgba(47,107,255,.26);
  box-shadow:0 0 70px -34px rgba(47,107,255,.85),inset 0 1px 0 rgba(255,255,255,.07);
}
.cta-band::before{
  content:"";position:absolute;left:-90px;top:50%;transform:translateY(-50%);
  width:260px;height:260px;border-radius:50%;
  background:radial-gradient(circle,rgba(47,107,255,.55),transparent 70%);
  filter:blur(70px);pointer-events:none;
}
.cta-band::after{
  content:"";position:absolute;right:-90px;top:50%;transform:translateY(-50%);
  width:260px;height:260px;border-radius:50%;
  background:radial-gradient(circle,rgba(23,195,178,.4),transparent 70%);
  filter:blur(80px);pointer-events:none;
}
.cta-copy{position:relative;z-index:2;max-width:640px;}
.cta-copy h2{font-size:22px;font-weight:700;line-height:1.35;margin-bottom:10px;}
.cta-copy p{font-size:15px;color:var(--text-2);}
.cta-action{position:relative;z-index:2;}
@media (min-width:768px){
  .cta-band{flex-direction:row;align-items:center;justify-content:space-between;padding:44px 40px;min-height:224px;}
  .cta-copy h2{font-size:26px;}
}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--bg-1);
  border-top:1px solid var(--line);
  padding:56px 0 0;
}
.footer-grid{
  display:grid;gap:32px;
  grid-template-columns:1fr;
  padding-bottom:40px;
}
@media (min-width:640px){.footer-grid{grid-template-columns:repeat(2,1fr);}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;}}
.footer-brand{
  display:flex;align-items:center;gap:10px;
  color:var(--text-1);font-weight:600;font-size:15px;margin-bottom:12px;
}
.footer-desc{font-size:13px;color:var(--text-3);line-height:1.8;max-width:280px;margin-bottom:14px;}
.footer-status{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;color:var(--text-3);
}
.footer-status i{
  width:7px;height:7px;border-radius:50%;background:var(--accent);
  box-shadow:0 0 0 4px rgba(23,195,178,.14);
}
.footer-col h4{
  font-size:13px;font-weight:600;color:var(--text-1);
  letter-spacing:.02em;margin-bottom:14px;
}
.footer-col ul{display:grid;gap:10px;}
.footer-col li{font-size:13px;color:var(--text-3);}
.footer-col a{font-size:13px;color:var(--text-3);}
.footer-col a:hover{color:var(--accent);}
.footer-bottom{
  border-top:1px solid var(--line);
  padding:20px 0 26px;
  display:flex;flex-direction:column;gap:8px;
}
.footer-bottom p{font-size:12px;color:var(--text-3);}
@media (min-width:768px){
  .footer-bottom{flex-direction:row;align-items:center;justify-content:space-between;}
}

/* 网格纹理 */
.grid-tex{
  position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.03) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px);
  background-size:56px 56px;
  opacity:.6;
  mask-image:radial-gradient(ellipse at 60% 30%,#000,transparent 78%);
  -webkit-mask-image:radial-gradient(ellipse at 60% 30%,#000,transparent 78%);
}
.diag-line{
  position:absolute;left:-10%;right:-10%;top:58%;height:1px;
  background:linear-gradient(90deg,transparent,rgba(47,107,255,.35),transparent);
  transform:rotate(-6deg);pointer-events:none;
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition:none!important;animation:none!important;scroll-behavior:auto!important;}
}

/* roulang page: category2 */
:root{
  --bg-0:#070B14;
  --bg-1:#0C1322;
  --bg-2:#131C31;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --brand:#2F6BFF;
  --brand-600:#2358E0;
  --brand-300:#7FA6FF;
  --accent:#17C3B2;
  --warm:#FFB020;
  --text-1:#E8EDF7;
  --text-2:#A7B3C9;
  --text-3:#6B7893;
  --radius-sm:10px;
  --radius:16px;
  --radius-lg:20px;
  --shadow-card:0 20px 40px -24px rgba(0,0,0,.85), inset 0 1px 0 rgba(255,255,255,.05);
  --t:200ms cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box}
html,body{overflow-x:hidden}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--text-1);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{display:block;max-width:100%;height:auto}
a{color:var(--text-2);text-decoration:none;transition:color var(--t)}
a:hover{color:var(--accent)}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding-left:0;list-style:none}
button{font:inherit;cursor:pointer;background:none;border:none;color:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}
::selection{background:rgba(47,107,255,.35);color:#fff}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:var(--bg-0)}
::-webkit-scrollbar-thumb{background:#1C2740;border-radius:999px;border:2px solid var(--bg-0)}
::-webkit-scrollbar-thumb:hover{background:#27354F}

.container-x{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media (min-width:768px){.container-x{padding:0 24px}}
@media (min-width:1024px){.container-x{padding:0 32px}}

.section{padding:56px 0;position:relative}
@media (min-width:768px){.section{padding:72px 0}}
@media (min-width:1024px){.section{padding:96px 0}}
.section.tone-1{background:var(--bg-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section.tone-0{background:var(--bg-0)}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;border-radius:12px;
  font-size:15px;font-weight:600;letter-spacing:.01em;
  border:1px solid transparent;white-space:nowrap;
  transition:transform var(--t),box-shadow var(--t),background-color var(--t),border-color var(--t),color var(--t),filter var(--t);
}
.btn-primary{
  background:linear-gradient(180deg,#3B7BFF,#2358E0);color:#fff;
  box-shadow:inset 0 0 0 1px rgba(127,166,255,.55),0 8px 30px rgba(47,107,255,.35);
}
.btn-primary:hover{color:#fff;filter:brightness(1.06);transform:translateY(-1px);box-shadow:inset 0 0 0 1px rgba(160,190,255,.7),0 12px 38px rgba(47,107,255,.48)}
.btn-primary:active{transform:translateY(1px);box-shadow:inset 0 2px 8px rgba(0,0,0,.4),0 4px 16px rgba(47,107,255,.25)}
.btn-ghost{background:transparent;border-color:var(--line-strong);color:var(--text-1)}
.btn-ghost:hover{border-color:rgba(47,107,255,.75);color:#fff;transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(1px)}
.btn-text{color:var(--accent);font-size:14px;font-weight:600;display:inline-flex;align-items:center;gap:6px;padding:4px 0}
.btn-text:hover{text-decoration:underline;color:var(--accent)}

.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:6px;
  font-size:13px;line-height:1;border:1px solid var(--line-strong);color:var(--text-2);
}
.badge-accent{border-color:rgba(23,195,178,.5);color:var(--accent);background:rgba(23,195,178,.07)}
.badge-brand{border-color:rgba(47,107,255,.5);color:var(--brand-300);background:rgba(47,107,255,.10)}

/* 导航 */
.nav-shell{
  position:absolute;top:20px;left:50%;transform:translateX(-50%);
  width:min(1120px,calc(100% - 32px));z-index:90;
}
.nav-shell.is-stuck{position:fixed;top:12px}
.nav-inner{
  position:relative;display:flex;align-items:center;justify-content:space-between;gap:12px;
  height:64px;padding:0 10px 0 16px;border-radius:999px;
  background:rgba(9,14,26,.72);
  -webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);
  border:1px solid rgba(255,255,255,.10);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.07);
  transition:background-color var(--t),box-shadow var(--t);
}
.nav-shell.is-stuck .nav-inner{background:rgba(9,14,26,.92);box-shadow:0 22px 44px -26px rgba(0,0,0,.95),inset 0 1px 0 rgba(255,255,255,.08)}
.brand{display:flex;align-items:center;gap:9px;color:var(--text-1);font-size:15px;font-weight:600;letter-spacing:-.01em;white-space:nowrap}
.brand:hover{color:var(--text-1)}
.brand-mark{
  flex:none;width:26px;height:26px;border-radius:8px;display:grid;place-items:center;
  background:linear-gradient(150deg,#3B7BFF,#17C3B2);
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.18),0 6px 16px -8px rgba(47,107,255,.9);
}
.brand-mark span{width:8px;height:8px;border-radius:2px;background:#fff;opacity:.92}
.nav-links{display:none}
.nav-actions{display:flex;align-items:center;gap:8px}
.nav-cta{
  display:inline-flex;align-items:center;justify-content:center;height:40px;padding:0 18px;border-radius:999px;
  font-size:14px;font-weight:600;color:#fff;
  background:linear-gradient(180deg,#3B7BFF,#2358E0);
  box-shadow:inset 0 0 0 1px rgba(127,166,255,.5),0 8px 24px -10px rgba(47,107,255,.85);
  transition:transform var(--t),filter var(--t),box-shadow var(--t);
}
.nav-cta:hover{color:#fff;filter:brightness(1.06);transform:translateY(-1px)}
.nav-toggle{
  flex:none;width:40px;height:40px;border-radius:999px;border:1px solid var(--line-strong);
  display:grid;place-items:center;transition:border-color var(--t),background-color var(--t);
}
.nav-toggle:hover{border-color:rgba(47,107,255,.7)}
.nav-toggle span{position:relative;display:block;width:16px;height:1.5px;border-radius:2px;background:var(--text-1);transition:background-color var(--t)}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:16px;height:1.5px;border-radius:2px;background:var(--text-1);
  transition:transform var(--t);
}
.nav-toggle span::before{top:-5px}
.nav-toggle span::after{top:5px}
.nav-shell.is-open .nav-toggle span{background:transparent}
.nav-shell.is-open .nav-toggle span::before{transform:translateY(5px) rotate(45deg)}
.nav-shell.is-open .nav-toggle span::after{transform:translateY(-5px) rotate(-45deg)}
@media (max-width:1023px){
  .nav-links{
    position:absolute;left:0;right:0;top:calc(100% + 10px);
    display:none;flex-direction:column;gap:2px;padding:8px;
    background:var(--bg-1);border:1px solid var(--line);border-radius:var(--radius-lg);
    box-shadow:0 28px 56px -28px rgba(0,0,0,.95);
  }
  .nav-shell.is-open .nav-links{display:flex}
  .nav-link{display:flex;align-items:center;height:52px;padding:0 16px;border-radius:14px;font-size:15px}
  .nav-link:hover::after{display:none}
  .nav-link.is-active{background:rgba(47,107,255,.12);color:var(--brand-300)}
}
@media (min-width:1024px){
  .nav-links{display:flex;align-items:center;gap:2px}
  .nav-toggle{display:none}
  .nav-link{
    position:relative;display:inline-flex;align-items:center;height:40px;padding:0 14px;border-radius:999px;
    font-size:14px;color:var(--text-2);transition:color var(--t),background-color var(--t);
  }
  .nav-link:hover{color:var(--text-1)}
  .nav-link:hover::after{
    content:"";position:absolute;left:20%;right:20%;bottom:5px;height:2px;border-radius:2px;background:var(--accent);
  }
  .nav-link.is-active{color:var(--brand-300);background:rgba(47,107,255,.10)}
  .nav-link.is-active::after{display:none}
}

/* Hero（居中文本式） */
.hero-c{
  position:relative;overflow:hidden;background:var(--bg-0);
  padding:132px 0 56px;
}
@media (min-width:768px){.hero-c{padding:150px 0 72px}}
@media (min-width:1024px){.hero-c{padding:168px 0 88px}}
.hero-c::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.03) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px);
  background-size:52px 52px;
  -webkit-mask-image:radial-gradient(circle at 50% 34%,#000 6%,transparent 72%);
  mask-image:radial-gradient(circle at 50% 34%,#000 6%,transparent 72%);
}
.hero-c::after{
  content:"";position:absolute;left:50%;top:-220px;width:840px;height:560px;transform:translateX(-50%);
  background:radial-gradient(circle at 50% 50%,rgba(47,107,255,.18),rgba(47,107,255,0) 68%);
  filter:blur(120px);pointer-events:none;
}
.hero-inner{position:relative;z-index:2;max-width:840px;margin:0 auto;text-align:center}
.hero-slash{
  position:absolute;left:50%;top:96px;width:min(760px,86%);height:1px;transform:translateX(-50%) rotate(-7deg);
  background:linear-gradient(90deg,transparent,rgba(47,107,255,.55),rgba(23,195,178,.35),transparent);
  opacity:.55;pointer-events:none;z-index:1;
}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:8px;font-size:13px;color:var(--text-3);margin-bottom:22px}
.crumbs a{color:var(--text-3)}
.crumbs a:hover{color:var(--accent)}
.crumbs i{width:5px;height:5px;border-radius:50%;background:var(--brand);display:inline-block;opacity:.85}
.hero-title{
  font-size:28px;font-weight:700;line-height:1.28;letter-spacing:-.01em;color:var(--text-1);
}
@media (min-width:768px){.hero-title{font-size:34px}}
@media (min-width:1024px){.hero-title{font-size:42px}}
.hero-title .hl{
  color:var(--brand-300);
  background:linear-gradient(180deg,transparent 62%,rgba(47,107,255,.24) 62%);
  padding:0 2px;
}
.hero-sub{margin:20px auto 0;max-width:620px;font-size:16px;color:var(--text-2);line-height:1.8}
@media (min-width:768px){.hero-sub{font-size:17px}}
.hero-actions{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:14px;margin-top:30px}
.hero-meta{
  display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin-top:34px;
}
.hero-meta span{
  display:inline-flex;align-items:center;gap:7px;height:30px;padding:0 12px;border-radius:999px;
  font-size:13px;color:var(--text-2);border:1px solid var(--line);background:rgba(19,28,49,.55);
}
.hero-meta b{color:var(--accent);font-weight:600;font-variant-numeric:tabular-nums}

/* 导语 */
.intro-wrap{max-width:800px;margin:0 auto}
.intro-wrap p{font-size:15px;color:var(--text-2);line-height:1.9}
.intro-wrap p + p{margin-top:1.25em}
.sec-head{margin-bottom:34px}
.sec-head h2{font-size:24px;font-weight:700;letter-spacing:-.01em;line-height:1.35}
@media (min-width:768px){.sec-head h2{font-size:29px}}
.sec-head p{margin-top:12px;font-size:15px;color:var(--text-2);max-width:720px}
.sec-head.center{text-align:center}
.sec-head.center p{margin-left:auto;margin-right:auto}

/* 交错网格卡 */
.stagger{display:grid;grid-template-columns:1fr;gap:20px;padding-bottom:0}
@media (min-width:768px){
  .stagger{grid-template-columns:repeat(2,minmax(0,1fr));column-gap:24px;row-gap:24px;padding-bottom:32px}
  .stagger > .tile:nth-child(even){margin-top:32px}
}
.tile{
  position:relative;display:flex;flex-direction:column;
  background:var(--bg-1);border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;box-shadow:var(--shadow-card);
  transition:transform var(--t),border-color var(--t),box-shadow var(--t);
}
.tile:hover{transform:translateY(-2px);border-color:rgba(47,107,255,.42);box-shadow:0 26px 48px -26px rgba(0,0,0,.9),0 0 0 1px rgba(47,107,255,.10),inset 0 1px 0 rgba(255,255,255,.07)}
.tile-media{position:relative;aspect-ratio:16/10;background:var(--bg-2);overflow:hidden}
.tile-media img{width:100%;height:100%;object-fit:cover;transition:transform 320ms cubic-bezier(.2,.7,.3,1);opacity:.92}
.tile:hover .tile-media img{transform:scale(1.025)}
.tile-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(7,11,20,.05),rgba(7,11,20,.55))}
.tile-body{padding:20px 22px 24px;position:relative}
.tile-num{
  display:block;font-size:12px;font-weight:700;letter-spacing:.18em;color:var(--accent);
  font-variant-numeric:tabular-nums;margin-bottom:8px;
}
.tile-title{font-size:19px;font-weight:600;line-height:1.5;color:var(--text-1)}
.tile-desc{margin-top:10px;font-size:15px;color:var(--text-2);line-height:1.8}
.tile-tag{position:absolute;top:14px;left:14px;z-index:2}

/* 要点条 */
.points{display:grid;grid-template-columns:1fr;gap:16px}
@media (min-width:640px){.points{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}}
@media (min-width:1024px){.points{grid-template-columns:repeat(4,minmax(0,1fr))}}
.point{
  background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px 20px;box-shadow:var(--shadow-card);
  transition:transform var(--t),border-color var(--t);
}
.point:hover{transform:translateY(-2px);border-color:rgba(23,195,178,.4)}
.point-ico{
  width:38px;height:38px;border-radius:12px;display:grid;place-items:center;margin-bottom:14px;
  background:rgba(47,107,255,.12);border:1px solid rgba(47,107,255,.35);color:var(--brand-300);
}
.point-ico svg{width:19px;height:19px;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.point h3{font-size:16px;font-weight:600;color:var(--text-1)}
.point p{margin-top:8px;font-size:14px;color:var(--text-2);line-height:1.8}

/* FAQ */
.faq-list{max-width:860px;margin:0 auto}
.faq-item{
  background:rgba(19,28,49,.62);
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  border:1px solid var(--line);border-radius:var(--radius);
  padding:0 20px;margin-bottom:12px;
  transition:border-color var(--t),background-color var(--t);
}
.faq-item:hover{border-color:rgba(47,107,255,.35)}
.faq-item[open]{border-color:rgba(47,107,255,.4);background:rgba(19,28,49,.78)}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 0;font-size:16px;font-weight:600;color:var(--text-1);cursor:pointer;list-style:none;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::marker{content:""}
.faq-arrow{flex:none;width:20px;height:20px;color:var(--accent);transition:transform var(--t)}
.faq-item[open] .faq-arrow{transform:rotate(180deg)}
.faq-answer{padding:0 0 18px;font-size:15px;color:var(--text-2);line-height:1.85;max-width:96%}

/* CTA 带 */
.cta-band{
  position:relative;overflow:hidden;
  background:linear-gradient(90deg,rgba(47,107,255,.14),rgba(47,107,255,.06) 55%,rgba(23,195,178,.08));
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  padding:56px 0;
}
@media (min-width:768px){.cta-band{padding:70px 0}}
.cta-band::before,.cta-band::after{
  content:"";position:absolute;top:50%;width:320px;height:320px;transform:translateY(-50%);
  background:radial-gradient(circle,rgba(47,107,255,.35),transparent 70%);filter:blur(90px);pointer-events:none;
}
.cta-band::before{left:-140px}
.cta-band::after{right:-140px}
.cta-inner{position:relative;z-index:2;display:flex;flex-direction:column;gap:22px;align-items:flex-start}
@media (min-width:768px){.cta-inner{flex-direction:row;align-items:center;justify-content:space-between;gap:40px}}
.cta-inner h2{font-size:23px;font-weight:700;letter-spacing:-.01em}
@media (min-width:768px){.cta-inner h2{font-size:27px}}
.cta-inner p{margin-top:10px;font-size:15px;color:var(--text-2);max-width:520px}

/* 页脚 */
.site-footer{background:var(--bg-1);border-top:1px solid var(--line);padding:56px 0 24px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px}
@media (min-width:768px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:36px}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px}}
.footer-brand{display:flex;align-items:center;gap:9px;font-size:15px;font-weight:600;color:var(--text-1)}
.footer-desc{margin-top:14px;font-size:13px;color:var(--text-3);line-height:1.8;max-width:260px}
.footer-status{display:inline-flex;align-items:center;gap:8px;margin-top:16px;font-size:13px;color:var(--text-2);border:1px solid var(--line);border-radius:999px;height:28px;padding:0 12px}
.footer-status i{width:7px;height:7px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 3px rgba(23,195,178,.16)}
.footer-col h4{font-size:13px;font-weight:600;color:var(--text-1);letter-spacing:.02em;margin-bottom:14px}
.footer-col ul{display:grid;gap:10px;font-size:13px;color:var(--text-3)}
.footer-col a{color:var(--text-3);font-size:13px}
.footer-col a:hover{color:var(--accent)}
.footer-bottom{
  margin-top:38px;padding-top:18px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:8px;
  font-size:12px;color:var(--text-3);
}
.footer-bottom p{font-size:12px;color:var(--text-3);line-height:1.7}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
}