/* roulang page: index */
:root{
  --bg-0:#0A0713;
  --bg-1:#120B1F;
  --surface:#17102A;
  --surface-2:#1E1533;
  --primary:#FF2F7E;
  --secondary:#7C5CFF;
  --accent:#22E3C6;
  --gold:#FFC861;
  --tx-1:#F6F2FF;
  --tx-2:#B3A9CE;
  --tx-3:#7E7595;
  --line:rgba(255,255,255,.08);
  --line-neon:rgba(255,47,126,.45);
  --grad-brand:linear-gradient(135deg,#FF2F7E 0%,#7C5CFF 52%,#22E3C6 100%);
  --grad-soft:linear-gradient(135deg,rgba(255,47,126,.12),rgba(124,92,255,.12) 52%,rgba(34,227,198,.12));
  --glow-primary:0 0 28px rgba(255,47,126,.30);
  --glow-accent:0 0 24px rgba(34,227,198,.25);
  --r-lg:24px;
  --r-md:18px;
  --r-sm:14px;
  --sh-rest:0 18px 48px rgba(0,0,0,.55);
  --sh-hover:0 26px 64px rgba(0,0,0,.60),0 0 0 1px var(--line-neon),0 0 28px rgba(255,47,126,.30);
  --ease:cubic-bezier(.22,.61,.36,1);
  --gap-card:24px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--tx-1);
  font-family:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:var(--tx-2);text-decoration:none;transition:color .2s var(--ease),background-color .2s var(--ease);}
a:hover{color:var(--accent);text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:2px;}
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid rgba(34,227,198,.75);outline-offset:2px;border-radius:8px;}
h1,h2,h3,h4{margin:0;color:var(--tx-1);letter-spacing:0;}
h1{font-size:clamp(32px,4.4vw,56px);line-height:1.2;font-weight:800;}
h2{font-size:clamp(26px,3vw,40px);line-height:1.3;font-weight:700;}
h3{font-size:20px;line-height:1.5;font-weight:600;}
p{margin:0 0 1em;color:var(--tx-2);}
ul{margin:0;padding:0;list-style:none;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
@media (min-width:1400px){ .container{max-width:1280px;} }
.row{--bs-gutter-x:var(--gap-card);}
.btn{font-family:inherit;border:none;}
.btn-neon{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  background:var(--grad-brand);background-size:160% 160%;background-position:0% 50%;
  color:#0A0713;font-weight:600;font-size:16px;
  padding:14px 28px;border-radius:999px;line-height:1.2;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),background-position .22s var(--ease);
}
.btn-neon:hover,.btn-neon:focus{color:#0A0713;text-decoration:none;transform:translateY(-2px);background-position:6% 50%;box-shadow:var(--glow-primary);}
.btn-neon:active{transform:translateY(0);filter:brightness(.92);}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  background:transparent;border:1px solid var(--line-neon);color:var(--primary);
  font-weight:600;font-size:16px;padding:13px 26px;border-radius:12px;line-height:1.2;
  transition:background-color .22s var(--ease),transform .22s var(--ease),color .22s var(--ease);
}
.btn-ghost:hover,.btn-ghost:focus{background:rgba(255,47,126,.12);color:var(--primary);text-decoration:none;transform:translateY(-2px);}
.btn-ghost:active{transform:translateY(0);filter:brightness(.94);}
.link-more{font-size:15px;font-weight:600;color:var(--accent);}
.link-more:hover{color:var(--accent);}
.text-grad{background:var(--grad-brand);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:transparent;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:1040;
  background:rgba(10,7,19,.86);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;
  border-image:linear-gradient(90deg,rgba(255,47,126,.6),rgba(124,92,255,.5),rgba(34,227,198,.6)) 1;
}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;height:72px;gap:20px;}
.brand{display:flex;align-items:center;gap:10px;color:var(--tx-1);font-weight:800;font-size:19px;}
.brand:hover{color:var(--tx-1);text-decoration:none;}
.brand-mark{
  width:36px;height:36px;border-radius:11px;background:var(--grad-brand);
  display:flex;align-items:center;justify-content:center;font-size:15px;font-weight:800;color:#0A0713;flex:0 0 auto;
  box-shadow:var(--glow-primary);
}
.brand-word em{font-style:normal;font-weight:800;color:var(--accent);}
.nav-menu{display:flex;align-items:center;gap:6px;list-style:none;margin:0;padding:0;}
.nav-menu a{
  position:relative;display:block;padding:10px 14px;font-size:15px;color:var(--tx-2);border-radius:10px;
  transition:color .2s var(--ease),box-shadow .2s var(--ease);
}
.nav-menu a::after{
  content:"";position:absolute;left:50%;bottom:2px;width:0;height:2px;border-radius:2px;
  background:var(--grad-brand);transform:translateX(-50%);transition:width .16s var(--ease);
}
.nav-menu a:hover{color:var(--tx-1);text-decoration:none;box-shadow:0 0 12px rgba(255,47,126,.35);}
.nav-menu a.active{color:var(--tx-1);}
.nav-menu a.active::after{width:calc(100% - 28px);}
.nav-cta{padding:11px 22px;font-size:15px;}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;background:transparent;
  border:1px solid var(--line-neon);color:var(--primary);font-size:18px;cursor:pointer;
  transition:background-color .2s var(--ease);
}
.nav-toggle:hover{background:rgba(255,47,126,.12);}
.drawer{
  position:fixed;top:0;right:0;height:100%;width:82vw;max-width:360px;z-index:1060;
  background:#0C0818;border-left:1px solid var(--line-neon);
  transform:translateX(102%);transition:transform .26s var(--ease);
  padding:24px 20px;display:flex;flex-direction:column;gap:8px;overflow-y:auto;
}
.drawer.open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px;}
.drawer-close{background:transparent;border:1px solid var(--line);color:var(--tx-2);width:38px;height:38px;border-radius:10px;cursor:pointer;}
.drawer a.drawer-link{
  display:flex;align-items:center;min-height:48px;padding:0 12px;border-bottom:1px solid var(--line);
  color:var(--tx-2);font-size:16px;
}
.drawer a.drawer-link.active{color:var(--accent);}
.drawer-cta{margin-top:auto;display:flex;}
.scrim{
  position:fixed;inset:0;background:rgba(4,2,10,.62);z-index:1050;opacity:0;visibility:hidden;
  transition:opacity .24s var(--ease),visibility .24s var(--ease);
}
.scrim.show{opacity:1;visibility:visible;}

/* ---------- hero ---------- */
.hero{position:relative;padding:72px 0 0;overflow:hidden;}
.hero::before{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(255,255,255,.055) 1px,transparent 1px);
  background-size:26px 26px;opacity:.7;pointer-events:none;
}
.hero-grid{position:relative;display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;letter-spacing:.06em;
  color:var(--accent);border:1px solid rgba(34,227,198,.35);border-radius:999px;
  padding:6px 14px;margin-bottom:20px;background:rgba(34,227,198,.07);
}
.hero h1{margin-bottom:18px;}
.hero-sub{font-size:17px;color:var(--tx-2);max-width:560px;margin-bottom:26px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:34px;}
.hero-stats{display:flex;flex-wrap:wrap;gap:16px;}
.stat{
  border:1px solid var(--line);border-radius:16px;padding:12px 20px;background:var(--surface);
  min-width:142px;
}
.stat b{display:block;font-family:"Inter","Barlow",sans-serif;font-size:30px;line-height:1.1;font-weight:800;
  background:var(--grad-brand);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;}
.stat b span{font-size:13px;font-weight:600;margin-left:2px;}
.stat i{display:block;font-style:normal;font-size:14px;color:var(--tx-2);margin-top:4px;}
.hero-visual{position:relative;border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);box-shadow:var(--sh-rest);}
.hero-visual img{width:100%;aspect-ratio:4/3;object-fit:cover;transition:transform .5s var(--ease);}
.hero-visual::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(10,7,19,0) 30%,rgba(10,7,19,.85) 100%);
}
.hero-visual:hover{border-color:var(--line-neon);box-shadow:var(--sh-hover);}
.hero-visual:hover img{transform:scale(1.03);}
.hero-visual-cap{
  position:absolute;left:22px;right:22px;bottom:20px;z-index:2;font-size:14px;color:var(--tx-2);
}
.hero-visual-cap strong{display:block;color:var(--tx-1);font-size:16px;margin-bottom:2px;}

/* ---------- sections ---------- */
.section{padding:96px 0 0;}
.section-head{max-width:760px;margin-bottom:44px;}
.section-head p{font-size:16px;color:var(--tx-2);margin:12px 0 0;}
.divider-neon{height:1px;background:var(--grad-brand);opacity:.5;margin:0;border:0;}

/* 编号横条 */
.value-list{display:flex;flex-direction:column;gap:16px;}
.value-row{
  display:grid;grid-template-columns:96px 1fr;gap:24px;align-items:center;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  padding:26px 30px;transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.value-row:hover{transform:translateY(-4px);border-color:var(--line-neon);box-shadow:var(--sh-hover);}
.value-num{
  font-family:"Inter","Barlow",sans-serif;font-size:44px;font-weight:800;line-height:1;
  background:var(--grad-brand);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
}
.value-row h3{margin-bottom:6px;}
.value-row p{margin:0;font-size:15px;}

/* 功能分组 2x2 */
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--gap-card);}
.feature-card{
  position:relative;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:30px;overflow:hidden;transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.feature-card::before{
  content:"";position:absolute;left:0;top:26px;width:3px;height:0;border-radius:0 3px 3px 0;
  background:var(--grad-brand);transition:height .22s var(--ease);
}
.feature-card:hover{transform:translateY(-6px);border-color:var(--line-neon);box-shadow:var(--sh-hover);}
.feature-card:hover::before{height:52px;}
.feature-icon{
  width:46px;height:46px;border-radius:14px;background:var(--grad-soft);border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;color:var(--accent);font-size:18px;margin-bottom:18px;
}
.feature-card h3{margin-bottom:14px;}
.feature-card ul{display:flex;flex-direction:column;gap:9px;}
.feature-card li{position:relative;padding-left:18px;font-size:15px;color:var(--tx-2);}
.feature-card li::before{
  content:"";position:absolute;left:0;top:11px;width:7px;height:7px;border-radius:50%;background:var(--accent);
  box-shadow:0 0 10px rgba(34,227,198,.6);
}
.chip-num{
  position:absolute;right:26px;top:26px;font-family:"Inter","Barlow",sans-serif;font-size:14px;font-weight:700;
  padding:5px 12px;border-radius:999px;background:rgba(124,92,255,.18);color:#C7BAFF;border:1px solid rgba(124,92,255,.35);
}

/* 交错图文 */
.scene{
  display:grid;grid-template-columns:7fr 5fr;gap:44px;align-items:center;margin-bottom:48px;
}
.scene.rev{grid-template-columns:5fr 7fr;}
.scene.rev .scene-media{order:-1;}
.scene-media{border-radius:20px;overflow:hidden;border:1px solid var(--line);box-shadow:var(--sh-rest);}
.scene-media img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .4s var(--ease);}
.scene-media:hover{border-color:var(--line-neon);box-shadow:var(--sh-hover);}
.scene-media:hover img{transform:scale(1.04);}
.scene h3{margin-bottom:12px;}
.scene-tag{
  display:inline-block;font-size:13px;color:var(--gold);border:1px solid rgba(255,200,97,.35);
  background:rgba(255,200,97,.08);border-radius:999px;padding:4px 12px;margin-bottom:14px;
}
.scene ul{display:flex;flex-direction:column;gap:8px;margin-top:14px;}
.scene li{position:relative;padding-left:20px;font-size:15px;color:var(--tx-2);}
.scene li::before{
  content:"\2713";position:absolute;left:0;top:0;color:var(--accent);font-size:13px;
}

/* 案例 */
.case-grid{display:grid;grid-template-columns:1fr 1fr;gap:var(--gap-card);}
.case-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;
  display:flex;flex-direction:column;transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.case-card:hover{transform:translateY(-6px);border-color:var(--line-neon);box-shadow:var(--sh-hover);}
.case-card img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.case-body{padding:28px;display:flex;flex-direction:column;gap:14px;flex:1;}
.case-card.wide{grid-column:span 2;}
.case-card.wide img{aspect-ratio:21/9;}
.case-body h3{margin:0;}
.case-body>p{margin:0;font-size:15px;}
.case-metrics{display:flex;flex-wrap:wrap;gap:10px;}
.metric{
  border:1px solid var(--line);border-radius:999px;padding:7px 14px;font-size:13px;color:var(--tx-2);
  background:var(--surface-2);
}
.metric b{
  font-family:"Inter","Barlow",sans-serif;font-size:15px;margin-right:4px;
  background:var(--grad-brand);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
}
.case-quote{
  margin-top:auto;font-size:14px;color:var(--tx-2);border-top:1px solid var(--line);padding-top:14px;
}

/* 价格 */
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--gap-card);align-items:stretch;}
.price-card{
  position:relative;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:32px 28px;display:flex;flex-direction:column;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.price-card:hover{transform:translateY(-6px);border-color:var(--line-neon);box-shadow:var(--sh-hover);}
.price-card.featured{border-color:var(--line-neon);box-shadow:0 26px 64px rgba(0,0,0,.6),0 0 34px rgba(255,47,126,.22);}
.price-card.featured::before{
  content:"";position:absolute;left:0;right:0;top:0;height:3px;border-radius:24px 24px 0 0;background:var(--grad-brand);
}
.price-badge{
  position:absolute;right:24px;top:-13px;font-size:12px;font-weight:700;letter-spacing:.04em;
  padding:5px 14px;border-radius:999px;background:var(--grad-brand);color:#0A0713;
}
.price-card h3{margin-bottom:6px;}
.price-desc{font-size:14px;color:var(--tx-2);margin-bottom:18px;}
.price-value{
  font-family:"Inter","Barlow",sans-serif;font-size:38px;font-weight:800;line-height:1.1;color:var(--gold);
  margin-bottom:6px;
}
.price-value small{font-size:14px;font-weight:500;color:var(--tx-3);margin-left:6px;}
.price-list{display:flex;flex-direction:column;gap:11px;margin:20px 0 26px;}
.price-list li{position:relative;padding-left:24px;font-size:15px;color:var(--tx-2);}
.price-list li::before{
  content:"\2713";position:absolute;left:0;top:1px;width:16px;height:16px;border-radius:50%;
  background:rgba(34,227,198,.14);color:var(--accent);font-size:10px;display:flex;align-items:center;justify-content:center;
  line-height:1;
}
.price-card .btn-neon,.price-card .btn-ghost{width:100%;margin-top:auto;}

/* 资讯 */
.news-filter{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:28px;}
.news-filter a{
  font-size:14px;padding:8px 18px;border-radius:999px;border:1px solid var(--line);color:var(--tx-2);
  background:var(--surface);
}
.news-filter a:hover,.news-filter a.active{border-color:var(--line-neon);color:var(--primary);text-decoration:none;background:rgba(255,47,126,.10);}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--gap-card);}
.news-card{
  display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-md);overflow:hidden;height:100%;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.news-card:hover{transform:translateY(-6px);border-color:var(--line-neon);box-shadow:var(--sh-hover);text-decoration:none;}
.news-card:hover .news-title{color:var(--accent);}
.news-thumb{aspect-ratio:16/9;overflow:hidden;background:var(--grad-soft);}
.news-thumb img{width:100%;height:100%;object-fit:cover;}
.news-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1;}
.news-meta{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--tx-3);}
.badge-cat{
  display:inline-block;font-size:12px;padding:3px 10px;border-radius:999px;
  background:rgba(124,92,255,.18);color:#C0B2FF;border:1px solid rgba(124,92,255,.3);
}
.news-title{
  font-size:17px;font-weight:600;line-height:1.55;color:var(--tx-1);margin:0;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  transition:color .2s var(--ease);
}
.news-excerpt{
  font-size:14px;color:var(--tx-2);margin:0;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-more{margin-top:auto;font-size:14px;font-weight:600;color:var(--accent);}
.empty-state{
  min-height:240px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
  border:1px dashed var(--line);border-radius:var(--r-lg);background:var(--surface);text-align:center;padding:32px;
}
.empty-state i{font-size:30px;color:var(--tx-3);}
.empty-state p{margin:0;color:var(--tx-2);}

/* FAQ */
.accordion-item{
  background:var(--surface);border:1px solid var(--line);border-radius:16px !important;margin-bottom:14px;overflow:hidden;
}
.accordion-button{
  background:transparent;color:var(--tx-1);font-size:18px;font-weight:600;padding:20px 24px;
  border:none;box-shadow:none !important;
}
.accordion-button:not(.collapsed){
  background:rgba(255,47,126,.06);color:var(--tx-1);
  border-left:3px solid transparent;
  border-image:linear-gradient(180deg,#FF2F7E,#22E3C6) 1;
}
.accordion-button::after{
  background-image:none;content:"+";font-size:22px;font-weight:400;color:var(--accent);
  width:auto;height:auto;transform:none;line-height:1;
}
.accordion-button:not(.collapsed)::after{content:"\2212";}
.accordion-body{padding:0 24px 22px;color:var(--tx-2);font-size:15px;}
.accordion-button h3{font-size:18px;margin:0;display:inline;}

/* CTA band */
.cta-band{
  margin-top:96px;border-radius:var(--r-lg);padding:52px 48px;position:relative;overflow:hidden;
  background:linear-gradient(135deg,rgba(255,47,126,.20),rgba(124,92,255,.18) 52%,rgba(34,227,198,.18));
  border:1px solid var(--line-neon);
}
.cta-band::after{
  content:"";position:absolute;right:-80px;top:-60px;width:280px;height:280px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,47,126,.28),transparent 65%);pointer-events:none;
}
.cta-band h2{margin-bottom:12px;position:relative;}
.cta-band p{max-width:620px;position:relative;margin-bottom:24px;}
.cta-band .btn-neon{position:relative;}

/* footer */
.site-footer{background:#07040E;margin-top:96px;padding:64px 0 0;position:relative;}
.site-footer::before{
  content:"";position:absolute;left:0;right:0;top:0;height:1px;background:var(--grad-brand);opacity:.7;
}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px;}
.footer-brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px;color:var(--tx-1);margin-bottom:14px;}
.footer-brand:hover{text-decoration:none;color:var(--tx-1);}
.footer-col p{font-size:14px;color:var(--tx-2);margin:0 0 12px;}
.footer-col h4{font-size:15px;font-weight:700;margin-bottom:16px;color:var(--tx-1);}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col li a,.footer-col li span{font-size:14px;color:var(--tx-2);}
.footer-bottom{
  margin-top:48px;border-top:1px solid var(--line);padding:22px 0 28px;font-size:13px;color:var(--tx-3);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
}
.to-top{
  position:fixed;right:22px;bottom:26px;width:46px;height:46px;border-radius:50%;z-index:1030;
  border:1px solid var(--line-neon);background:rgba(23,16,42,.92);color:var(--accent);cursor:pointer;
  display:flex;align-items:center;justify-content:center;opacity:0;visibility:hidden;
  transition:opacity .22s var(--ease),visibility .22s var(--ease),transform .22s var(--ease);
}
.to-top.show{opacity:1;visibility:visible;}
.to-top:hover{transform:translateY(-3px);box-shadow:var(--glow-accent);}

@media (max-width:1199px){
  .section{padding:72px 0 0;}
  .cta-band{margin-top:72px;}
  .site-footer{margin-top:72px;}
  .hero-grid{grid-template-columns:1fr;gap:36px;}
  .scene,.scene.rev{grid-template-columns:1fr;gap:28px;}
  .scene.rev .scene-media{order:0;}
  .news-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
}
@media (max-width:991px){
  .nav-menu,.nav-cta{display:none;}
  .nav-toggle{display:flex;align-items:center;justify-content:center;}
  .section{padding:56px 0 0;}
  .cta-band{margin-top:56px;padding:38px 28px;}
  .site-footer{margin-top:56px;}
  .grid-2,.price-grid,.case-grid{grid-template-columns:1fr;}
  .case-card.wide{grid-column:span 1;}
  .case-card.wide img{aspect-ratio:16/9;}
  .value-row{grid-template-columns:64px 1fr;gap:16px;padding:22px;}
  .value-num{font-size:34px;}
}
@media (max-width:767px){
  body{font-size:16px;}
  .container{padding:0 16px;}
  :root{--gap-card:16px;}
  .section{padding:44px 0 0;}
  .nav-wrap{height:60px;}
  .hero{padding-top:44px;}
  .hero-actions .btn-neon,.hero-actions .btn-ghost{width:100%;}
  .hero-stats{display:grid;grid-template-columns:1fr 1fr;gap:12px;}
  .stat{min-width:0;padding:12px 14px;}
  .stat b{font-size:24px;}
  .feature-card,.price-card,.case-body{padding:20px;}
  .news-grid{grid-template-columns:1fr;}
  .cta-band{margin-top:44px;padding:28px 20px;}
  .site-footer{margin-top:44px;}
  .footer-grid{grid-template-columns:1fr;}
  .chip-num{position:static;display:inline-block;margin-bottom:12px;}
  .accordion-button{padding:16px;font-size:16px;}
  .accordion-body{padding:0 16px 18px;}
  .to-top{right:14px;bottom:16px;}
}

/* roulang page: article */
:root{
  --bg-0:#0A0713;
  --bg-1:#120B1F;
  --surface:#17102A;
  --surface-2:#1E1533;
  --primary:#FF2F7E;
  --secondary:#7C5CFF;
  --accent:#22E3C6;
  --gold:#FFC861;
  --grad-brand:linear-gradient(135deg,#FF2F7E 0%,#7C5CFF 52%,#22E3C6 100%);
  --grad-soft:linear-gradient(135deg,rgba(255,47,126,.12) 0%,rgba(124,92,255,.12) 52%,rgba(34,227,198,.12) 100%);
  --tx-1:#F6F2FF;
  --tx-2:#B3A9CE;
  --tx-3:#7E7595;
  --line:rgba(255,255,255,.08);
  --line-neon:rgba(255,47,126,.45);
  --glow-primary:0 0 28px rgba(255,47,126,.30);
  --glow-accent:0 0 24px rgba(34,227,198,.25);
  --r-lg:24px;
  --r-md:18px;
  --r-sm:14px;
  --r-img:20px;
  --sh-rest:0 18px 48px rgba(0,0,0,.55);
  --sh-hover:0 26px 64px rgba(0,0,0,.60);
  --ease:cubic-bezier(.22,.61,.36,1);
  --ff:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --ff-num:"Inter","Barlow","PingFang SC",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--tx-2);
  font-family:var(--ff);
  font-size:16px;
  line-height:1.8;
  letter-spacing:0;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--tx-2);text-decoration:none;transition:color .2s var(--ease),opacity .2s var(--ease)}
a:hover{color:var(--accent);text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:4px}
button{font-family:inherit}
h1,h2,h3,h4{margin:0;color:var(--tx-1);font-weight:700;line-height:1.35}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid rgba(34,227,198,.75);outline-offset:2px;box-shadow:0 0 0 4px rgba(34,227,198,.18);border-radius:8px}
::selection{background:rgba(255,47,126,.35);color:#fff}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:#0d0918}
::-webkit-scrollbar-thumb{background:linear-gradient(180deg,#FF2F7E,#7C5CFF);border-radius:999px;border:2px solid #0d0918}

.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 24px;
}
@media (min-width:1400px){.container{max-width:1280px}}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:1000;
  background:rgba(10,7,19,.86);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.site-header::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:-1px;
  height:1px;
  background:linear-gradient(90deg,rgba(255,47,126,0),rgba(255,47,126,.75),rgba(34,227,198,.7),rgba(255,47,126,0));
}
.nav-wrap{display:flex;align-items:center;gap:24px;height:72px;position:relative}
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;flex-shrink:0}
.brand:hover{text-decoration:none}
.brand-mark{
  width:36px;height:36px;border-radius:12px;
  background:var(--grad-brand);
  color:#0A0713;
  font-family:var(--ff-num);
  font-weight:800;
  font-size:14px;
  display:inline-flex;align-items:center;justify-content:center;
  letter-spacing:.5px;
  box-shadow:0 0 18px rgba(255,47,126,.35);
}
.brand-word{font-size:19px;font-weight:800;color:var(--tx-1);letter-spacing:-.01em}
.brand-word em{
  font-style:normal;
  background:var(--grad-brand);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.nav-menu{display:flex;align-items:center;gap:6px;margin-left:auto}
.nav-menu li a{
  display:inline-block;
  padding:8px 14px;
  font-size:15px;
  color:var(--tx-2);
  border-radius:12px;
  position:relative;
  transition:color .22s var(--ease),text-shadow .22s var(--ease),transform .22s var(--ease);
}
.nav-menu li a:hover{color:var(--tx-1);text-shadow:0 0 12px rgba(255,47,126,.75);text-decoration:none;transform:translateY(-1px)}
.nav-menu li a.active{color:var(--tx-1);text-shadow:0 0 14px rgba(255,47,126,.85)}
.nav-menu li a.active::after{
  content:"";
  position:absolute;left:50%;bottom:2px;
  width:22px;height:2px;border-radius:2px;
  transform:translateX(-50%);
  background:var(--grad-brand);
  box-shadow:0 0 12px rgba(255,47,126,.8);
}
.btn-neon{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 26px;
  border:0;
  border-radius:999px;
  background:var(--grad-brand);
  background-size:150% 150%;
  color:#0B0614;
  font-weight:700;
  font-size:15px;
  cursor:pointer;
  text-decoration:none;
  box-shadow:0 10px 26px rgba(255,47,126,.28);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),background-position .22s var(--ease),filter .22s var(--ease);
}
.btn-neon:hover{
  color:#0B0614;
  text-decoration:none;
  transform:translateY(-2px);
  background-position:60% 50%;
  box-shadow:0 16px 34px rgba(255,47,126,.42),var(--glow-primary);
}
.btn-neon:active{transform:translateY(0);filter:brightness(.92)}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 24px;
  border-radius:12px;
  border:1px solid var(--line-neon);
  background:transparent;
  color:var(--primary);
  font-weight:600;
  font-size:15px;
  text-decoration:none;
  transition:background .22s var(--ease),transform .22s var(--ease),box-shadow .22s var(--ease),color .22s var(--ease);
}
.btn-ghost:hover{
  background:rgba(255,47,126,.12);
  color:#FF87B6;
  text-decoration:none;
  transform:translateY(-2px);
  box-shadow:var(--glow-primary);
}
.nav-cta{flex-shrink:0;padding:11px 22px;font-size:14px}
.nav-toggle{
  display:none;
  margin-left:auto;
  width:44px;height:44px;
  border-radius:12px;
  border:1px solid var(--line-neon);
  background:rgba(255,47,126,.08);
  color:var(--tx-1);
  font-size:18px;
  cursor:pointer;
  transition:background .2s var(--ease),transform .2s var(--ease);
}
.nav-toggle:hover{background:rgba(255,47,126,.18)}

/* ============ 面包屑 ============ */
.crumb-bar{padding:28px 0 0}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:var(--tx-3)}
.crumb a{color:var(--tx-2)}
.crumb a:hover{color:var(--accent)}
.crumb .sep{color:rgba(126,117,149,.7)}
.crumb .current{color:var(--tx-3);max-width:56ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ============ 文章头 ============ */
.post-head{padding:26px 0 8px;max-width:900px}
.post-head h1{
  font-size:clamp(30px,3.6vw,46px);
  font-weight:800;
  line-height:1.25;
  letter-spacing:-.02em;
  color:var(--tx-1);
}
.post-meta{display:flex;flex-wrap:wrap;align-items:center;gap:14px;margin-top:18px;font-size:14px;color:var(--tx-3)}
.badge-cat{
  display:inline-flex;align-items:center;
  padding:5px 14px;
  border-radius:999px;
  background:rgba(124,92,255,.18);
  color:#B7A6FF;
  font-size:13px;
  font-weight:600;
  letter-spacing:.2px;
}
.post-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--tx-3);opacity:.6}
.post-lead{
  margin-top:20px;
  padding:18px 22px;
  border-radius:var(--r-md);
  background:var(--grad-soft);
  border:1px solid var(--line);
  color:var(--tx-2);
  font-size:15.5px;
}

/* ============ 双栏布局 ============ */
.article-layout{
  display:flex;
  flex-wrap:wrap;
  gap:32px;
  padding:36px 0 0;
  align-items:flex-start;
}
.article-side{
  order:2;
  width:100%;
  display:flex;
  flex-direction:column;
  gap:18px;
}
.article-main{
  order:1;
  width:100%;
  min-width:0;
}
@media (min-width:1200px){
  .article-side{order:1;flex:0 0 268px;width:268px;position:sticky;top:96px}
  .article-main{order:2;flex:1 1 auto;max-width:820px}
}
.side-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  padding:20px;
  box-shadow:var(--sh-rest);
  transition:border-color .22s var(--ease),box-shadow .22s var(--ease),transform .22s var(--ease);
}
.side-card:hover{border-color:var(--line-neon);box-shadow:var(--sh-hover),var(--glow-primary);transform:translateY(-3px)}
.side-card h3{
  font-size:14px;
  font-weight:700;
  letter-spacing:.4px;
  color:var(--tx-3);
  text-transform:uppercase;
  margin-bottom:14px;
  display:flex;align-items:center;gap:8px;
}
.side-card h3 i{color:var(--accent)}
.toc-list li{margin-bottom:8px}
.toc-list a{
  display:block;
  font-size:14px;
  line-height:1.6;
  color:var(--tx-2);
  padding-left:12px;
  border-left:2px solid rgba(255,255,255,.10);
  transition:border-color .2s var(--ease),color .2s var(--ease),padding-left .2s var(--ease);
}
.toc-list a:hover{border-left-color:var(--primary);color:var(--accent);padding-left:16px;text-decoration:none}
.hot-list li + li{margin-top:12px;padding-top:12px;border-top:1px dashed var(--line)}
.hot-list a{font-size:14.5px;line-height:1.65;color:var(--tx-2);display:block}
.hot-list a:hover{color:var(--accent)}
.side-cta{
  background:linear-gradient(150deg,rgba(255,47,126,.20),rgba(124,92,255,.14) 55%,rgba(34,227,198,.14));
  border:1px solid var(--line-neon);
  border-radius:var(--r-md);
  padding:22px;
  box-shadow:var(--sh-rest);
}
.side-cta h3{
  font-size:17px;
  font-weight:700;
  color:var(--tx-1);
  margin-bottom:8px;
}
.side-cta p{font-size:14px;color:var(--tx-2);margin-bottom:16px}
.side-cta .btn-neon{width:100%;padding:11px 18px;font-size:14px}

/* ============ 正文排版 ============ */
.post-body{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:40px clamp(20px,4vw,44px);
  box-shadow:var(--sh-rest);
  font-size:17px;
  line-height:1.9;
  color:var(--tx-2);
  overflow-wrap:break-word;
  word-break:break-word;
}
.post-body > *:first-child{margin-top:0}
.post-body p{margin:0 0 1.4em}
.post-body h2{
  position:relative;
  font-size:clamp(21px,2.3vw,27px);
  font-weight:700;
  color:var(--tx-1);
  margin:40px 0 16px;
  padding-left:18px;
}
.post-body h2::before{
  content:"";
  position:absolute;left:0;top:.16em;bottom:.16em;width:4px;border-radius:4px;
  background:var(--grad-brand);
  box-shadow:0 0 14px rgba(255,47,126,.5);
}
.post-body h3{font-size:19px;font-weight:600;color:var(--tx-1);margin:32px 0 12px}
.post-body h4{font-size:17px;font-weight:600;color:var(--tx-1);margin:24px 0 10px}
.post-body ul,.post-body ol{margin:0 0 1.4em;padding-left:0}
.post-body ul li{position:relative;padding-left:22px;margin-bottom:10px}
.post-body ul li::before{
  content:"";
  position:absolute;left:2px;top:.78em;
  width:7px;height:7px;border-radius:50%;
  background:var(--accent);
  box-shadow:0 0 10px rgba(34,227,198,.65);
}
.post-body ol{counter-reset:cmsli;list-style:none}
.post-body ol li{position:relative;padding-left:34px;margin-bottom:10px;counter-increment:cmsli}
.post-body ol li::before{
  content:counter(cmsli);
  position:absolute;left:0;top:.35em;
  width:22px;height:22px;border-radius:8px;
  background:rgba(124,92,255,.22);
  color:#BCA9FF;
  font-family:var(--ff-num);
  font-size:12px;font-weight:700;
  display:inline-flex;align-items:center;justify-content:center;
}
.post-body blockquote{
  margin:26px 0;
  padding:18px 22px;
  border-left:3px solid var(--primary);
  border-radius:0 var(--r-sm) var(--r-sm) 0;
  background:rgba(255,47,126,.06);
  color:var(--tx-1);
  font-size:16px;
}
.post-body blockquote p:last-child{margin-bottom:0}
.post-body img{border-radius:18px;margin:24px auto;box-shadow:0 16px 40px rgba(0,0,0,.5)}
.post-body figure{margin:26px 0}
.post-body figcaption{text-align:center;font-size:13px;color:var(--tx-3);margin-top:10px}
.post-body a{color:var(--accent);text-decoration:none;border-bottom:1px dashed rgba(34,227,198,.5)}
.post-body a:hover{color:#7BF4E1;text-decoration:none;border-bottom-style:solid}
.post-body table{
  width:100%;
  display:block;
  overflow-x:auto;
  border-collapse:collapse;
  margin:26px 0;
  font-size:15px;
  -webkit-overflow-scrolling:touch;
}
.post-body table th,.post-body table td{
  border:1px solid var(--line);
  padding:12px 14px;
  text-align:left;
  white-space:nowrap;
}
.post-body table th{background:var(--surface-2);color:var(--tx-1);font-weight:600}
.post-body code{
  background:var(--surface-2);
  border:1px solid var(--line);
  border-radius:8px;
  padding:2px 7px;
  font-family:"SFMono-Regular",Consolas,monospace;
  font-size:14px;
  color:var(--gold);
}
.post-body hr{border:0;height:1px;background:var(--line);margin:34px 0}
.post-body strong{color:var(--tx-1)}

/* 空态 */
.post-empty{
  text-align:center;
  padding:74px 24px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
}
.post-empty i{font-size:38px;color:var(--tx-3);margin-bottom:16px;display:block}
.post-empty h2{font-size:22px;color:var(--tx-1);margin-bottom:10px}
.post-empty p{color:var(--tx-3);margin-bottom:22px}

/* 文末标签与分享 */
.post-foot{
  margin-top:30px;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:16px;
  justify-content:space-between;
  padding:20px 24px;
  background:var(--surface-2);
  border:1px solid var(--line);
  border-radius:var(--r-md);
}
.tag-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px}
.tag-row .label{font-size:13px;color:var(--tx-3)}
.tag{
  display:inline-flex;align-items:center;
  padding:5px 13px;
  border-radius:999px;
  background:rgba(34,227,198,.10);
  border:1px solid rgba(34,227,198,.28);
  color:#7BF4E1;
  font-size:13px;
}
.share-row{display:flex;align-items:center;gap:12px}
.share-row .label{font-size:13px;color:var(--tx-3)}
.share-row a{
  width:36px;height:36px;
  border-radius:50%;
  display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);
  background:var(--surface);
  color:var(--tx-2);
  transition:transform .22s var(--ease),border-color .22s var(--ease),color .22s var(--ease),box-shadow .22s var(--ease);
}
.share-row a:hover{
  transform:translateY(-3px);
  border-color:var(--line-neon);
  color:var(--primary);
  box-shadow:var(--glow-primary);
  text-decoration:none;
}

/* 返回入口 */
.back-links{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.back-links .btn-ghost i{font-size:13px}

/* ============ 相关推荐 ============ */
.rel-block{margin-top:56px}
.sec-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:14px;margin-bottom:24px}
.sec-head h2{font-size:clamp(22px,2.6vw,30px);font-weight:700}
.sec-head p{font-size:14.5px;color:var(--tx-3);margin-top:8px}
.rel-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--gap-card,24px)}
.rel-card{
  display:block;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  overflow:hidden;
  box-shadow:var(--sh-rest);
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.rel-card:hover{
  transform:translateY(-6px);
  border-color:var(--line-neon);
  box-shadow:var(--sh-hover),var(--glow-primary);
  text-decoration:none;
}
.rel-thumb{aspect-ratio:16/9;overflow:hidden;background:var(--grad-soft)}
.rel-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .26s var(--ease)}
.rel-card:hover .rel-thumb img{transform:scale(1.04)}
.rel-body{padding:18px 20px 20px}
.rel-meta{display:flex;align-items:center;gap:10px;font-size:12.5px;color:var(--tx-3);margin-bottom:10px}
.rel-body h3{font-size:16.5px;font-weight:600;line-height:1.55;color:var(--tx-1);transition:color .22s var(--ease)}
.rel-card:hover .rel-body h3{color:var(--accent)}

/* ============ 文末 CTA ============ */
.cta-band{
  margin-top:56px;
  border-radius:var(--r-lg);
  padding:clamp(28px,4vw,48px);
  background:linear-gradient(135deg,rgba(255,47,126,.22),rgba(124,92,255,.18) 55%,rgba(34,227,198,.16));
  border:1px solid var(--line-neon);
  box-shadow:var(--sh-rest);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:22px;
}
.cta-band h2{font-size:clamp(22px,2.6vw,30px);color:var(--tx-1)}
.cta-band p{margin-top:10px;font-size:15px;color:var(--tx-2);max-width:52ch}

/* ============ 页脚 ============ */
.site-footer{
  margin-top:96px;
  background:#07040E;
  border-top:1px solid var(--line);
  position:relative;
}
.site-footer::before{
  content:"";
  position:absolute;left:0;right:0;top:-1px;height:1px;
  background:linear-gradient(90deg,rgba(255,47,126,0),rgba(255,47,126,.8),rgba(34,227,198,.7),rgba(255,47,126,0));
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.1fr;
  gap:36px;
  padding:64px 0 40px;
}
.footer-brand{
  display:inline-flex;align-items:center;gap:10px;
  font-size:18px;font-weight:800;color:var(--tx-1);
  margin-bottom:16px;
  text-decoration:none;
}
.footer-brand:hover{color:var(--accent);text-decoration:none}
.footer-col p{font-size:14px;color:var(--tx-3);line-height:1.8;margin-bottom:10px}
.footer-col h4{font-size:15px;color:var(--tx-1);margin-bottom:18px;font-weight:700}
.footer-col ul li{margin-bottom:11px}
.footer-col ul li a,.footer-col ul li span{font-size:14px;color:var(--tx-2)}
.footer-col ul li span{color:var(--tx-3)}
.footer-col ul li a:hover{color:var(--accent)}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;
  padding:22px 0 30px;
  border-top:1px solid var(--line);
  font-size:13.5px;
  color:var(--tx-3);
}

/* 返回顶部 */
.to-top{
  position:fixed;right:22px;bottom:22px;
  width:48px;height:48px;border-radius:50%;
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--surface);
  border:1px solid var(--line-neon);
  color:var(--primary);
  box-shadow:var(--glow-primary);
  cursor:pointer;
  opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s var(--ease);
  z-index:990;
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{color:#fff;background:var(--grad-brand)}

/* 移动端抽屉 */
.nav-scrim{
  position:fixed;inset:0;
  background:rgba(5,3,10,.6);
  opacity:0;visibility:hidden;
  transition:opacity .24s var(--ease),visibility .24s var(--ease);
  z-index:1000;
}
body.nav-open .nav-scrim{opacity:1;visibility:visible}

@media (max-width:1199px){
  .rel-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .article-main{max-width:100%}
}
@media (max-width:991px){
  .nav-wrap{height:60px}
  .nav-toggle{display:inline-flex;align-items:center;justify-content:center}
  .nav-menu{
    position:fixed;top:0;right:0;
    width:82vw;max-width:340px;height:100vh;
    background:var(--bg-1);
    border-left:1px solid var(--line-neon);
    flex-direction:column;align-items:stretch;gap:0;
    padding:84px 20px 120px;
    transform:translateX(105%);
    transition:transform .26s var(--ease);
    z-index:1001;
    overflow-y:auto;
    margin-left:0;
  }
  body.nav-open .nav-menu{transform:translateX(0)}
  .nav-menu li a{
    display:block;
    line-height:48px;
    padding:0 12px;
    font-size:16px;
    border-bottom:1px solid var(--line);
    border-radius:0;
  }
  .nav-menu li a.active::after{left:12px;transform:none;width:14px;bottom:0}
  .nav-cta{
    position:fixed;
    right:20px;bottom:26px;
    width:calc(82vw - 40px);
    max-width:300px;
    transform:translateX(130%);
    transition:transform .26s var(--ease);
    z-index:1002;
  }
  body.nav-open .nav-cta{transform:translateX(0)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;padding:52px 0 34px}
  .site-footer{margin-top:72px}
  .cta-band{margin-top:44px}
}
@media (max-width:767px){
  .container{padding:0 16px}
  .article-layout{gap:24px;padding-top:26px}
  .post-body{padding:26px 18px;font-size:16.5px}
  .post-head{padding-top:20px}
  .post-head h1{font-size:clamp(26px,7vw,32px)}
  .rel-grid{grid-template-columns:1fr;gap:16px}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .post-foot{flex-direction:column;align-items:flex-start}
  .cta-band{margin-top:40px;padding:24px 18px}
  .cta-band .btn-neon,.cta-band .btn-ghost{width:100%}
  .back-links .btn-ghost{width:100%}
  .rel-block{margin-top:40px}
}
@media (max-width:520px){
  .crumb .current{max-width:36ch}
  .post-meta{gap:10px;font-size:13px}
  .side-cta .btn-neon{width:100%}
}

/* roulang page: category1 */
:root{
  --bg-0:#0A0713;
  --bg-1:#120B1F;
  --surface:#17102A;
  --surface-2:#1E1533;
  --primary:#FF2F7E;
  --secondary:#7C5CFF;
  --accent:#22E3C6;
  --gold:#FFC861;
  --grad-brand:linear-gradient(135deg,#FF2F7E 0%,#7C5CFF 52%,#22E3C6 100%);
  --grad-soft:linear-gradient(135deg,rgba(255,47,126,.12),rgba(124,92,255,.12) 52%,rgba(34,227,198,.12));
  --tx-1:#F6F2FF;
  --tx-2:#B3A9CE;
  --tx-3:#7E7595;
  --line:rgba(255,255,255,.08);
  --line-neon:rgba(255,47,126,.45);
  --glow-primary:0 0 28px rgba(255,47,126,.30);
  --glow-accent:0 0 24px rgba(34,227,198,.25);
  --r-lg:24px;
  --r-md:18px;
  --r-sm:14px;
  --r-img:20px;
  --shadow-1:0 18px 48px rgba(0,0,0,.55);
  --shadow-2:0 26px 64px rgba(0,0,0,.60);
  --gap-card:24px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --t:220ms;
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
  --font-num:"Inter","Barlow",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--tx-1);
  font-family:var(--font-cn);
  font-size:16.5px;
  line-height:1.8;
  letter-spacing:0;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
body.nav-open{overflow:hidden;}
img{max-width:100%;height:auto;display:block;}
a{color:var(--tx-2);text-decoration:none;transition:color var(--t) var(--ease);}
a:hover{color:var(--accent);text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:2px;}
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid rgba(34,227,198,.75);outline-offset:2px;box-shadow:var(--glow-accent);}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;color:var(--tx-1);letter-spacing:0;font-weight:700;}
p{margin:0 0 1.1em;}
p:last-child{margin-bottom:0;}
::selection{background:rgba(255,47,126,.35);color:#fff;}
::-webkit-scrollbar{width:10px;height:10px;}
::-webkit-scrollbar-track{background:#0b0716;}
::-webkit-scrollbar-thumb{background:linear-gradient(180deg,#FF2F7E,#7C5CFF);border-radius:99px;border:2px solid #0b0716;}

.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:24px;
  padding-right:24px;
}
@media (min-width:1400px){ .container{max-width:1280px;} }

/* ============ 按钮 ============ */
.btn-grad,.btn-neon{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-family:var(--font-cn);font-size:15.5px;font-weight:600;line-height:1;
  padding:15px 28px;border-radius:999px;border:1px solid transparent;
  cursor:pointer;text-decoration:none;white-space:nowrap;
  transition:transform var(--t) var(--ease),box-shadow var(--t) var(--ease),background var(--t) var(--ease),color var(--t) var(--ease),filter var(--t) var(--ease);
}
.btn-grad{
  background-image:var(--grad-brand);background-size:160% 160%;background-position:0% 50%;
  color:#12081C;box-shadow:0 12px 30px rgba(255,47,126,.22);
}
.btn-grad:hover{transform:translateY(-2px);background-position:6% 50%;box-shadow:0 18px 40px rgba(255,47,126,.34),var(--glow-primary);color:#12081C;text-decoration:none;}
.btn-grad:active{transform:translateY(0);filter:brightness(.92);}
.btn-neon{
  background:transparent;color:var(--primary);border:1px solid var(--line-neon);
}
.btn-neon:hover{background:rgba(255,47,126,.12);transform:translateY(-2px);color:var(--tx-1);text-decoration:none;}
.btn-neon:active{transform:translateY(0);filter:brightness(.94);}
.btn-sm{padding:11px 20px;font-size:14.5px;}
.link-more{font-size:14.5px;font-weight:600;color:var(--accent);white-space:nowrap;}
.link-more i{margin-left:6px;transition:transform var(--t) var(--ease);}
.link-more:hover i{transform:translateX(4px);}

/* ============ 导航 ============ */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(10,7,19,.86);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.site-header::after{
  content:"";display:block;height:1px;width:100%;
  background:linear-gradient(90deg,transparent,rgba(255,47,126,.8),rgba(124,92,255,.8),rgba(34,227,198,.7),transparent);
  opacity:.75;
}
.nav-wrap{
  display:flex;align-items:center;gap:20px;height:72px;position:relative;
}
.brand{display:flex;align-items:center;gap:11px;text-decoration:none;flex:0 0 auto;}
.brand:hover{text-decoration:none;}
.brand-mark{
  width:38px;height:38px;border-radius:12px;display:grid;place-items:center;
  background-image:var(--grad-brand);color:#12081C;font-family:var(--font-num);
  font-weight:800;font-size:15px;letter-spacing:.5px;box-shadow:var(--glow-primary);
}
.brand-word{font-size:18px;font-weight:800;color:var(--tx-1);letter-spacing:-.01em;}
.brand-word em{
  font-style:normal;
  background-image:var(--grad-brand);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.nav-menu{display:flex;align-items:center;gap:30px;margin-left:auto;}
.nav-menu a{
  position:relative;display:inline-block;line-height:72px;font-size:15.5px;font-weight:500;
  color:var(--tx-2);text-decoration:none;
}
.nav-menu a::after{
  content:"";position:absolute;left:50%;right:50%;bottom:20px;height:2px;border-radius:2px;
  background-image:var(--grad-brand);transition:left var(--t) var(--ease),right var(--t) var(--ease);
}
.nav-menu a:hover{color:var(--tx-1);text-shadow:0 0 12px rgba(255,47,126,.55);text-decoration:none;}
.nav-menu a.active{color:var(--tx-1);text-shadow:0 0 14px rgba(255,47,126,.6);}
.nav-menu a.active::after{left:0;right:0;}
.nav-cta{flex:0 0 auto;padding:12px 22px;font-size:14.5px;}
.nav-toggle{
  display:none;margin-left:auto;width:44px;height:44px;border-radius:12px;
  background:transparent;border:1px solid var(--line-neon);color:var(--primary);
  font-size:17px;align-items:center;justify-content:center;cursor:pointer;
  transition:background var(--t) var(--ease),color var(--t) var(--ease);
}
.nav-toggle:hover{background:rgba(255,47,126,.14);color:var(--tx-1);}
.nav-backdrop{
  position:fixed;inset:0;background:rgba(4,2,10,.62);z-index:1040;
  opacity:0;visibility:hidden;transition:opacity var(--t) var(--ease),visibility var(--t) var(--ease);
}
.nav-backdrop.show{opacity:1;visibility:visible;}

/* ============ 面包屑 ============ */
.crumb-bar{padding:26px 0 0;}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:var(--tx-3);}
.crumb a{color:var(--tx-2);text-decoration:none;}
.crumb a:hover{color:var(--accent);text-decoration:underline;}
.crumb .sep{color:var(--tx-3);opacity:.7;}
.crumb .current{color:var(--tx-3);}

/* ============ 分类 Hero ============ */
.page-hero{padding:34px 0 56px;position:relative;overflow:hidden;}
.page-hero::before{
  content:"";position:absolute;top:-160px;left:-120px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,47,126,.16),transparent 68%);pointer-events:none;
}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center;position:relative;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;letter-spacing:.06em;
  color:var(--accent);background:rgba(34,227,198,.10);border:1px solid rgba(34,227,198,.28);
  padding:7px 14px;border-radius:999px;margin-bottom:18px;
}
.page-hero h1{
  font-size:clamp(30px,3.6vw,46px);line-height:1.24;font-weight:800;letter-spacing:-.02em;
  margin-bottom:16px;
}
.page-hero h1 em{
  font-style:normal;background-image:var(--grad-brand);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-intro{font-size:16.5px;color:var(--tx-2);max-width:60ch;margin-bottom:26px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;}
.hero-media{
  position:relative;border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);
  box-shadow:var(--shadow-1);transition:box-shadow var(--t) var(--ease),border-color var(--t) var(--ease),transform var(--t) var(--ease);
}
.hero-media img{width:100%;aspect-ratio:16/11;object-fit:cover;}
.hero-media::after{
  content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(10,7,19,0) 34%,rgba(10,7,19,.88));
  pointer-events:none;
}
.hero-media:hover{border-color:var(--line-neon);box-shadow:var(--shadow-2),var(--glow-primary);transform:translateY(-3px);}
.hero-media .media-tag{
  position:absolute;left:20px;bottom:18px;z-index:2;display:flex;flex-direction:column;gap:4px;
}
.hero-media .media-tag strong{font-size:17px;font-weight:700;}
.hero-media .media-tag span{font-size:13.5px;color:var(--tx-2);}

/* ============ 板块通用 ============ */
.section{padding:96px 0;position:relative;}
.section.alt{background:var(--bg-1);}
.sec-head{max-width:760px;margin-bottom:44px;}
.sec-head h2{font-size:clamp(24px,2.6vw,34px);line-height:1.32;margin-bottom:14px;}
.sec-head p{color:var(--tx-2);font-size:16px;margin:0;}
.sec-head .kicker{
  display:block;font-size:13px;font-weight:600;letter-spacing:.08em;color:var(--primary);
  margin-bottom:10px;text-transform:uppercase;
}
.divider-neon{height:2px;width:88px;border-radius:2px;background-image:var(--grad-brand);margin-bottom:20px;opacity:.85;}

/* ============ 概念说明 ============ */
.concept-grid{display:grid;grid-template-columns:6fr 6fr;gap:44px;align-items:start;}
.concept-copy p{color:var(--tx-2);font-size:16.5px;}
.concept-copy strong{color:var(--tx-1);font-weight:600;}
.hl-band{
  margin-top:26px;padding:20px 24px;border-radius:var(--r-md);
  background:var(--grad-soft);border:1px solid var(--line);border-left:3px solid var(--primary);
  color:var(--tx-1);font-size:15.5px;
}
.hl-band i{color:var(--gold);margin-right:8px;}
.fact-list{display:grid;gap:16px;}
.fact-item{
  display:flex;gap:16px;align-items:flex-start;padding:20px 22px;border-radius:var(--r-md);
  background:var(--surface);border:1px solid var(--line);
  transition:border-color var(--t) var(--ease),box-shadow var(--t) var(--ease),transform var(--t) var(--ease);
}
.fact-item:hover{border-color:var(--line-neon);box-shadow:var(--shadow-2);transform:translateY(-4px);}
.fact-item .fi-ico{
  flex:0 0 auto;width:42px;height:42px;border-radius:12px;display:grid;place-items:center;
  background:rgba(34,227,198,.10);color:var(--accent);font-size:16px;border:1px solid rgba(34,227,198,.22);
}
.fact-item h3{font-size:17px;margin-bottom:6px;}
.fact-item p{font-size:14.8px;color:var(--tx-2);margin:0;}

/* ============ 编号清单 ============ */
.num-list{display:grid;gap:0;border-top:1px solid var(--line);}
.num-item{
  display:grid;grid-template-columns:96px 1fr;gap:28px;align-items:start;
  padding:30px 8px;border-bottom:1px solid var(--line);
  transition:background var(--t) var(--ease),padding-left var(--t) var(--ease);
}
.num-item:hover{background:rgba(255,47,126,.05);padding-left:18px;}
.num-idx{
  font-family:var(--font-num);font-size:38px;font-weight:800;line-height:1;
  background-image:var(--grad-brand);-webkit-background-clip:text;background-clip:text;color:transparent;
  opacity:.95;
}
.num-body h3{font-size:19.5px;margin-bottom:8px;}
.num-body p{color:var(--tx-2);font-size:15.6px;margin:0;max-width:76ch;}
.num-body .tip{
  display:inline-block;margin-top:10px;font-size:13.5px;color:var(--gold);
  background:rgba(255,200,97,.10);border:1px solid rgba(255,200,97,.28);border-radius:999px;padding:5px 12px;
}

/* ============ 对比条 ============ */
.compare{
  border-radius:var(--r-lg);border:1px solid var(--line);background:var(--surface);
  overflow:hidden;box-shadow:var(--shadow-1);
}
.compare-head,.compare-row{display:grid;grid-template-columns:280px 1fr;}
.compare-head{
  background:var(--grad-soft);border-bottom:1px solid var(--line);
  font-size:14px;font-weight:700;letter-spacing:.04em;color:var(--tx-1);
}
.compare-head span{padding:18px 26px;}
.compare-head span:first-child{border-right:1px solid var(--line);color:var(--accent);}
.compare-row{border-bottom:1px solid var(--line);transition:background var(--t) var(--ease);}
.compare-row:last-child{border-bottom:0;}
.compare-row:hover{background:rgba(124,92,255,.07);}
.compare-row .c-key{
  padding:22px 26px;border-right:1px solid var(--line);font-weight:600;font-size:16px;
  display:flex;align-items:center;gap:10px;
}
.compare-row .c-key i{color:var(--primary);font-size:13px;}
.compare-row .c-val{padding:22px 26px;font-size:15.6px;color:var(--tx-2);}
.compare-note{margin-top:18px;font-size:14px;color:var(--tx-3);}

/* ============ FAQ ============ */
.faq-accordion .accordion-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-sm);
  margin-bottom:14px;overflow:hidden;box-shadow:none;
}
.faq-accordion .accordion-item:last-child{margin-bottom:0;}
.faq-accordion .accordion-button{
  background:transparent;color:var(--tx-1);font-size:18px;font-weight:600;font-family:var(--font-cn);
  padding:22px 26px;box-shadow:none;border-radius:var(--r-sm);
}
.faq-accordion .accordion-button:not(.collapsed){
  background:rgba(255,47,126,.06);color:var(--tx-1);
  border-left:3px solid var(--primary);box-shadow:none;
}
.faq-accordion .accordion-button::after{
  width:16px;height:16px;background-size:16px;background-image:none;
  content:"+";font-size:20px;font-weight:600;color:var(--primary);line-height:1;
  display:grid;place-items:center;transition:transform var(--t) var(--ease);
}
.faq-accordion .accordion-button:not(.collapsed)::after{content:"−";transform:none;}
.faq-accordion .accordion-button:focus{box-shadow:none;outline:2px solid rgba(34,227,198,.75);outline-offset:-2px;}
.faq-accordion .accordion-body{
  padding:0 26px 24px;color:var(--tx-2);font-size:15.6px;line-height:1.85;
}
.faq-accordion .accordion-collapse.collapse.show,.faq-accordion .accordion-collapse.collapsing{
  border-left:3px solid rgba(255,47,126,.4);
}

/* ============ 交叉链接卡 ============ */
.link-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--gap-card);}
.link-card{
  display:flex;flex-direction:column;height:100%;text-decoration:none;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  overflow:hidden;box-shadow:var(--shadow-1);
  transition:transform var(--t) var(--ease),border-color var(--t) var(--ease),box-shadow var(--t) var(--ease);
}
.link-card:hover{transform:translateY(-6px);border-color:var(--line-neon);box-shadow:var(--shadow-2),var(--glow-primary);text-decoration:none;}
.link-card .lc-media{position:relative;overflow:hidden;}
.link-card .lc-media img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform 260ms var(--ease);}
.link-card:hover .lc-media img{transform:scale(1.04);}
.link-card .lc-body{padding:22px 24px 26px;display:flex;flex-direction:column;gap:10px;flex:1;}
.link-card .lc-tag{
  align-self:flex-start;font-size:12.5px;font-weight:600;padding:5px 12px;border-radius:999px;
  background:rgba(124,92,255,.18);color:#C0B2FF;
}
.link-card h3{font-size:18.5px;line-height:1.5;transition:color var(--t) var(--ease);}
.link-card:hover h3{color:var(--accent);}
.link-card p{font-size:14.8px;color:var(--tx-2);margin:0;}
.link-card .lc-foot{margin-top:auto;padding-top:12px;font-size:14px;font-weight:600;color:var(--accent);}

/* ============ CTA 条 ============ */
.cta-band{
  position:relative;overflow:hidden;border-radius:var(--r-lg);
  background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow-1);
  padding:52px 48px;
}
.cta-band::before{
  content:"";position:absolute;inset:0;background:var(--grad-soft);opacity:.9;pointer-events:none;
}
.cta-band::after{
  content:"";position:absolute;top:0;left:0;right:0;height:3px;background-image:var(--grad-brand);
}
.cta-inner{position:relative;z-index:2;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:26px;}
.cta-inner h2{font-size:clamp(22px,2.4vw,30px);margin-bottom:10px;}
.cta-inner p{color:var(--tx-2);font-size:15.8px;margin:0;max-width:62ch;}

/* ============ 页脚 ============ */
.site-footer{
  background:#07040E;border-top:1px solid var(--line);position:relative;margin-top:20px;
}
.site-footer::before{
  content:"";position:absolute;top:-1px;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(255,47,126,.8),rgba(34,227,198,.6),transparent);
}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;padding:64px 0 40px;
}
.footer-brand{
  display:inline-flex;align-items:center;gap:11px;font-size:17.5px;font-weight:800;color:var(--tx-1);
  margin-bottom:16px;text-decoration:none;
}
.footer-brand:hover{text-decoration:none;color:var(--tx-1);}
.footer-col p{font-size:14.6px;color:var(--tx-2);margin-bottom:10px;}
.footer-col h4{font-size:15.5px;margin-bottom:16px;color:var(--tx-1);}
.footer-col ul{display:grid;gap:11px;}
.footer-col ul a,.footer-col ul span{font-size:14.6px;color:var(--tx-2);text-decoration:none;}
.footer-col ul a:hover{color:var(--accent);}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  padding:20px 0 28px;border-top:1px solid var(--line);font-size:14px;color:var(--tx-3);
}
.back-top{
  position:fixed;right:24px;bottom:26px;width:46px;height:46px;border-radius:50%;
  display:grid;place-items:center;border:1px solid var(--line-neon);background:rgba(23,16,42,.92);
  color:var(--primary);font-size:16px;cursor:pointer;opacity:0;visibility:hidden;
  transform:translateY(10px);z-index:1020;
  transition:opacity var(--t) var(--ease),transform var(--t) var(--ease),visibility var(--t) var(--ease),box-shadow var(--t) var(--ease);
}
.back-top.show{opacity:1;visibility:visible;transform:translateY(0);}
.back-top:hover{box-shadow:var(--glow-primary);color:var(--tx-1);}

/* ============ 响应式 ============ */
@media (min-width:992px) and (max-width:1199.98px){
  .section{padding:72px 0;}
  .hero-grid{gap:34px;}
  .link-grid{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:991.98px){
  .nav-menu{
    position:fixed;top:0;right:0;height:100vh;width:82vw;max-width:360px;
    background:var(--bg-1);border-left:1px solid var(--line-neon);
    flex-direction:column;align-items:stretch;gap:0;
    margin:0;padding:88px 24px 28px;z-index:1050;overflow-y:auto;
    transform:translateX(102%);transition:transform 240ms var(--ease);
    box-shadow:-24px 0 60px rgba(0,0,0,.6);
  }
  .nav-menu.open{transform:translateX(0);}
  .nav-menu li{width:100%;}
  .nav-menu a{
    display:block;line-height:48px;height:48px;font-size:16px;border-bottom:1px solid var(--line);
  }
  .nav-menu a::after{display:none;}
  .nav-menu a.active{color:var(--accent);}
  .nav-cta{display:none;}
  .nav-toggle{display:inline-flex;}
  .nav-wrap{height:60px;}
  .section{padding:56px 0;}
  .hero-grid{grid-template-columns:1fr;gap:30px;}
  .page-hero{padding:26px 0 42px;}
  .concept-grid{grid-template-columns:1fr;gap:30px;}
  .link-grid{grid-template-columns:1fr;}
  .cta-band{padding:38px 26px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;padding:52px 0 32px;}
}
@media (max-width:767.98px){
  body{font-size:16px;}
  .container{padding-left:16px;padding-right:16px;}
  .section{padding:44px 0;}
  .page-hero h1{font-size:clamp(26px,6.4vw,32px);}
  .num-item{grid-template-columns:64px 1fr;gap:18px;padding:24px 4px;}
  .num-idx{font-size:30px;}
  .compare-head,.compare-row{grid-template-columns:1fr;}
  .compare-head span:first-child{border-right:0;border-bottom:1px solid var(--line);}
  .compare-row .c-key{border-right:0;border-bottom:1px dashed var(--line);padding:18px 22px 12px;}
  .compare-row .c-val{padding:0 22px 20px;}
  .faq-accordion .accordion-button{font-size:16.5px;padding:18px 20px;}
  .faq-accordion .accordion-body{padding:0 20px 20px;}
  .hero-actions .btn-grad,.hero-actions .btn-neon{width:100%;}
  .cta-band{padding:32px 20px;}
  .cta-inner .btn-grad,.cta-inner .btn-neon{width:100%;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .back-top{right:16px;bottom:18px;}
}
@media (max-width:520px){
  .brand-word{font-size:16px;}
  .sec-head h2{font-size:24px;}
}

/* roulang page: category2 */
:root{
  --bg-0:#0A0713;--bg-1:#120B1F;--surface:#17102A;--surface-2:#1E1533;
  --primary:#FF2F7E;--secondary:#7C5CFF;--accent:#22E3C6;--gold:#FFC861;
  --grad-brand:linear-gradient(135deg,#FF2F7E 0%,#7C5CFF 52%,#22E3C6 100%);
  --grad-soft:linear-gradient(135deg,rgba(255,47,126,.14),rgba(124,92,255,.12),rgba(34,227,198,.10));
  --tx-1:#F6F2FF;--tx-2:#B3A9CE;--tx-3:#7E7595;
  --line:rgba(255,255,255,.08);--line-neon:rgba(255,47,126,.45);
  --glow-primary:0 0 28px rgba(255,47,126,.30);
  --glow-accent:0 0 24px rgba(34,227,198,.25);
  --r-lg:24px;--r-md:18px;--r-sm:14px;--r-img:20px;
  --sh:0 18px 48px rgba(0,0,0,.55);
  --sh-hover:0 26px 64px rgba(0,0,0,.60);
  --gap-card:24px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
  --font-num:"Inter","Barlow",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--bg-0);color:var(--tx-1);font-family:var(--font-cn);
  font-size:16px;line-height:1.8;font-weight:400;letter-spacing:0;
  overflow-x:hidden;-webkit-font-smoothing:antialiased;
}
body::before{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:0;
  background:
    radial-gradient(620px 420px at 12% -4%,rgba(255,47,126,.14),transparent 70%),
    radial-gradient(560px 400px at 96% 8%,rgba(34,227,198,.10),transparent 70%);
}
img{max-width:100%;height:auto;display:block}
a{color:var(--tx-2);text-decoration:none;transition:color .22s var(--ease)}
a:hover{color:var(--accent);text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:2px}
h1,h2,h3,h4{margin:0;color:var(--tx-1);letter-spacing:0;font-weight:700}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}
ul,ol{margin:0;padding:0;list-style:none}
button{font-family:inherit}
a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{
  outline:2px solid rgba(34,227,198,.75);outline-offset:2px;border-radius:8px;
}
::selection{background:rgba(255,47,126,.35);color:#fff}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:#0C0817}
::-webkit-scrollbar-thumb{background:linear-gradient(180deg,#FF2F7E,#7C5CFF);border-radius:10px;border:2px solid #0C0817}

.container{width:100%;max-width:1200px;margin:0 auto;padding-left:24px;padding-right:24px}
@media (min-width:1400px){.container{max-width:1280px}}
.row{--bs-gutter-x:var(--gap-card);--bs-gutter-y:var(--gap-card)}

/* ============ 顶栏 ============ */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(10,7,19,.86);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
}
.site-header::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:var(--grad-brand);opacity:.55;
}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:22px;height:72px}
.brand{display:flex;align-items:center;gap:11px;color:var(--tx-1);text-decoration:none;flex:0 0 auto}
.brand:hover{color:var(--tx-1);text-decoration:none}
.brand-mark{
  width:38px;height:38px;border-radius:12px;background:var(--grad-brand);
  color:#0A0713;font-family:var(--font-num);font-weight:800;font-size:15px;
  display:grid;place-items:center;box-shadow:var(--glow-primary);letter-spacing:.5px;
}
.brand-word{font-size:19px;font-weight:800;white-space:nowrap}
.brand-word em{
  font-style:normal;background:var(--grad-brand);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.nav-menu{display:flex;align-items:center;gap:4px;margin:0 auto;padding:0;list-style:none}
.nav-menu a{
  position:relative;display:block;padding:10px 14px;font-size:15px;color:var(--tx-2);
  border-radius:12px;white-space:nowrap;transition:color .22s var(--ease);
}
.nav-menu a::after{
  content:"";position:absolute;left:50%;right:50%;bottom:4px;height:2px;
  background:var(--grad-brand);transition:left .22s var(--ease),right .22s var(--ease);
}
.nav-menu a:hover{color:var(--tx-1);text-shadow:0 0 12px rgba(255,47,126,.55);text-decoration:none}
.nav-menu a.active{color:var(--tx-1);text-shadow:0 0 12px rgba(255,47,126,.7)}
.nav-menu a.active::after{left:14px;right:14px}
.btn-grad{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 28px;border-radius:999px;border:0;cursor:pointer;
  background:var(--grad-brand);background-size:160% 160%;background-position:0% 50%;
  color:#0A0713;font-weight:700;font-size:15.5px;text-decoration:none;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),background-position .24s var(--ease);
}
.btn-grad:hover{
  color:#0A0713;text-decoration:none;transform:translateY(-2px);
  background-position:6% 50%;
  box-shadow:0 14px 34px rgba(255,47,126,.32),var(--glow-primary);
}
.btn-grad:active{transform:translateY(0);filter:brightness(.92)}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 24px;border-radius:12px;cursor:pointer;
  border:1px solid var(--line-neon);background:transparent;color:var(--primary);
  font-weight:600;font-size:15.5px;text-decoration:none;
  transition:background .22s var(--ease),transform .22s var(--ease),color .22s var(--ease);
}
.btn-ghost:hover{background:rgba(255,47,126,.12);color:var(--primary);text-decoration:none;transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(0);filter:brightness(.94)}
.nav-cta{padding:12px 22px;font-size:15px}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;
  border:1px solid var(--line-neon);background:rgba(255,47,126,.08);
  color:var(--primary);font-size:18px;cursor:pointer;
}
.nav-mask{
  display:none;position:fixed;inset:0;background:rgba(6,4,12,.6);z-index:1020;
  opacity:0;pointer-events:none;transition:opacity .24s var(--ease);
}

/* ============ 通用板块 ============ */
.section{padding:96px 0;position:relative;z-index:1}
.section--tight{padding-top:26px}
.section-head{max-width:760px;margin-bottom:44px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;
  letter-spacing:.06em;color:var(--accent);margin-bottom:14px;
  padding:6px 14px;border-radius:999px;border:1px solid rgba(34,227,198,.28);
  background:rgba(34,227,198,.08);
}
.sec-title{font-size:clamp(24px,2.6vw,36px);line-height:1.3;font-weight:700}
.sec-desc{margin-top:14px;color:var(--tx-2);font-size:16px;max-width:760px}
.hl{background:var(--grad-brand);-webkit-background-clip:text;background-clip:text;color:transparent}
.divider{height:1px;background:linear-gradient(90deg,transparent,var(--line-neon),transparent);border:0;margin:0}

/* ============ 面包屑 & 简版 Hero ============ */
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:var(--tx-3);padding-top:28px}
.crumbs a{color:var(--tx-2)}
.crumbs .sep{color:var(--tx-3);opacity:.7}
.crumbs .current{color:var(--tx-3)}
.page-hero{padding:26px 0 8px;position:relative;z-index:1}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:44px;align-items:center}
.page-hero h1{
  font-size:clamp(30px,3.6vw,44px);line-height:1.24;font-weight:800;
  letter-spacing:-.02em;margin:16px 0 0;
}
.hero-lead{margin-top:16px;color:var(--tx-2);font-size:16.5px;max-width:620px}
.hero-chips{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
.chip{
  display:inline-flex;align-items:center;gap:8px;padding:9px 16px;border-radius:999px;
  border:1px solid var(--line);background:var(--surface);color:var(--tx-2);font-size:14px;
}
.chip i{color:var(--accent)}
.hero-figure{
  position:relative;border-radius:var(--r-lg);overflow:hidden;
  border:1px solid var(--line);box-shadow:var(--sh);
  transition:transform .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease);
}
.hero-figure:hover{transform:translateY(-4px);border-color:var(--line-neon);box-shadow:var(--sh-hover),var(--glow-primary)}
.hero-figure img{width:100%;aspect-ratio:16/11;object-fit:cover}
.hero-figure::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(10,7,19,0) 38%,rgba(10,7,19,.86) 100%);
}
.hero-caption{
  position:absolute;left:20px;right:20px;bottom:16px;z-index:2;
  font-size:13.5px;color:var(--tx-2);letter-spacing:.02em;
}

/* ============ 步骤时间线 ============ */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;position:relative}
.steps::before{
  content:"";position:absolute;top:44px;left:6%;right:6%;height:1px;
  background:linear-gradient(90deg,rgba(255,47,126,.55),rgba(124,92,255,.5),rgba(34,227,198,.45));
  opacity:.4;
}
.step{
  position:relative;z-index:1;padding:28px 24px;border-radius:20px;
  background:var(--surface);border:1px solid var(--line);
  transition:transform .24s var(--ease),border-color .24s var(--ease),box-shadow .24s var(--ease);
}
.step:hover{transform:translateY(-6px);border-color:var(--line-neon);box-shadow:var(--sh-hover),var(--glow-primary)}
.step-num{
  font-family:var(--font-num);font-size:36px;font-weight:800;line-height:1;
  background:var(--grad-brand);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.step h3{font-size:20px;font-weight:600;margin:14px 0 8px;line-height:1.5}
.step p{color:var(--tx-2);font-size:15px;line-height:1.85}
.step-tag{
  display:inline-block;margin-top:14px;font-size:13px;color:var(--accent);
  padding:4px 12px;border-radius:999px;background:rgba(34,227,198,.10);
  border:1px solid rgba(34,227,198,.24);
}

/* ============ 图文卡 ============ */
.duo{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--gap-card)}
.info-card{
  display:flex;flex-direction:column;overflow:hidden;border-radius:var(--r-lg);
  background:var(--surface);border:1px solid var(--line);
  transition:transform .24s var(--ease),border-color .24s var(--ease),box-shadow .24s var(--ease);
}
.info-card:hover{transform:translateY(-6px);border-color:var(--line-neon);box-shadow:var(--sh-hover),var(--glow-primary)}
.info-card img{width:100%;aspect-ratio:16/9;object-fit:cover;border-bottom:1px solid var(--line)}
.info-card .card-body{padding:28px;flex:1}
.info-card h3{font-size:21px;font-weight:600;margin-bottom:12px;position:relative;padding-left:0;transition:color .22s var(--ease)}
.info-card:hover h3{color:var(--accent)}
.info-card p{color:var(--tx-2);font-size:15.5px}
.dot-list{margin-top:16px;display:grid;gap:10px}
.dot-list li{position:relative;padding-left:20px;color:var(--tx-2);font-size:15px;line-height:1.75}
.dot-list li::before{
  content:"";position:absolute;left:0;top:11px;width:8px;height:8px;border-radius:50%;
  background:var(--grad-brand);box-shadow:var(--glow-accent);
}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
.tag{
  font-size:13px;padding:5px 13px;border-radius:999px;
  background:rgba(124,92,255,.18);color:#C3B4FF;border:1px solid rgba(124,92,255,.3);
}
.tag--gold{background:rgba(255,200,97,.14);color:var(--gold);border-color:rgba(255,200,97,.3)}

/* ============ 注意事项 ============ */
.notice-list{display:grid;gap:14px}
.notice-item{
  display:flex;gap:16px;align-items:flex-start;padding:20px 24px;
  border-radius:0 16px 16px 0;border-left:3px solid rgba(255,47,126,.65);
  background:linear-gradient(90deg,rgba(255,47,126,.09),rgba(23,16,42,.5));
  transition:transform .22s var(--ease),border-color .22s var(--ease);
}
.notice-item:hover{transform:translateX(4px);border-left-color:var(--accent)}
.notice-item i{color:var(--primary);font-size:17px;margin-top:5px}
.notice-item:hover i{color:var(--accent)}
.notice-item h3{font-size:18px;font-weight:600;margin-bottom:6px}
.notice-item p{color:var(--tx-2);font-size:15px}

/* ============ 参数对照条 ============ */
.param-strip{
  border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;
  background:var(--surface);box-shadow:var(--sh);
}
.param-row{
  display:grid;grid-template-columns:1.05fr 1.5fr;gap:18px;padding:22px 28px;
  border-bottom:1px solid var(--line);align-items:center;
  transition:background .22s var(--ease);
}
.param-row:last-child{border-bottom:0}
.param-row:hover{background:rgba(255,47,126,.05)}
.param-key{display:flex;align-items:center;gap:10px;font-weight:600;color:var(--tx-1)}
.param-key i{color:var(--secondary)}
.param-val{color:var(--tx-2);font-size:15.5px}
.param-val b{color:var(--accent);font-weight:600}

/* ============ FAQ ============ */
.faq-acc .accordion-item{
  background:var(--surface);border:1px solid var(--line);border-radius:16px;
  margin-bottom:14px;overflow:hidden;
}
.faq-acc .accordion-button{
  background:transparent;color:var(--tx-1);font-size:18px;font-weight:600;
  padding:20px 26px;box-shadow:none;border:0;width:100%;text-align:left;
  transition:background .22s var(--ease),box-shadow .22s var(--ease);
}
.faq-acc .accordion-button:not(.collapsed){
  background:rgba(255,47,126,.06);color:var(--tx-1);
  box-shadow:inset 3px 0 0 0 var(--primary);
}
.faq-acc .accordion-button:focus{box-shadow:inset 3px 0 0 0 var(--primary),0 0 0 3px rgba(34,227,198,.16)}
.faq-acc .accordion-button::after{
  content:"+";background-image:none;font-family:var(--font-num);font-size:22px;
  display:grid;place-items:center;width:28px;height:28px;line-height:1;color:var(--accent);
  transform:none;transition:color .22s var(--ease);
}
.faq-acc .accordion-button:not(.collapsed)::after{content:"−";color:var(--primary)}
.faq-acc .accordion-body{padding:2px 26px 22px;color:var(--tx-2);font-size:15.5px;line-height:1.85}
.faq-acc .accordion-body strong{color:var(--tx-1)}

/* ============ 交叉链接 ============ */
.link-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--gap-card)}
.link-card{
  display:flex;flex-direction:column;gap:12px;padding:28px 26px;border-radius:20px;
  background:var(--surface-2);border:1px solid var(--line);color:var(--tx-2);
  transition:transform .24s var(--ease),border-color .24s var(--ease),box-shadow .24s var(--ease);
}
.link-card:hover{
  transform:translateY(-6px);border-color:var(--line-neon);
  box-shadow:var(--sh-hover),var(--glow-primary);text-decoration:none;color:var(--tx-2);
}
.link-card .lc-tag{font-size:13px;color:var(--secondary);letter-spacing:.04em}
.link-card h3{font-size:19px;font-weight:600;line-height:1.5;transition:color .22s var(--ease)}
.link-card:hover h3{color:var(--accent)}
.link-card p{font-size:15px;color:var(--tx-2);margin:0}
.link-card .lc-more{font-size:14px;color:var(--primary);display:inline-flex;align-items:center;gap:8px;margin-top:auto}

/* ============ CTA 条 ============ */
.cta-band{
  position:relative;overflow:hidden;border-radius:var(--r-lg);padding:46px 44px;
  border:1px solid var(--line-neon);
  background:
    radial-gradient(520px 260px at 12% 20%,rgba(255,47,126,.20),transparent 70%),
    radial-gradient(460px 240px at 88% 80%,rgba(34,227,198,.16),transparent 70%),
    var(--surface);
  display:flex;align-items:center;justify-content:space-between;gap:30px;flex-wrap:wrap;
  box-shadow:var(--sh);
}
.cta-band h2{font-size:clamp(22px,2.4vw,32px);line-height:1.35}
.cta-band p{color:var(--tx-2);margin-top:12px;max-width:560px;font-size:15.5px}
.cta-band .cta-actions{display:flex;gap:12px;flex-wrap:wrap}

/* ============ 页脚 ============ */
.site-footer{
  position:relative;background:#07040E;padding:72px 0 28px;margin-top:20px;z-index:1;
}
.site-footer::before{
  content:"";position:absolute;left:0;right:0;top:0;height:1px;background:var(--grad-brand);opacity:.6;
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:36px}
.footer-col h4{font-size:16px;font-weight:600;margin-bottom:18px;color:var(--tx-1)}
.footer-col ul{display:grid;gap:11px}
.footer-col a,.footer-col span{color:var(--tx-2);font-size:14.5px}
.footer-col a:hover{color:var(--accent)}
.footer-brand{
  display:flex;align-items:center;gap:10px;font-size:18px;font-weight:800;
  color:var(--tx-1);margin-bottom:16px;
}
.footer-brand:hover{color:var(--tx-1);text-decoration:none}
.footer-brand .brand-mark{width:34px;height:34px;border-radius:11px;font-size:14px}
.footer-col p{color:var(--tx-2);font-size:14.5px;line-height:1.85}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  color:var(--tx-3);font-size:13.5px;
}
.to-top{
  position:fixed;right:22px;bottom:26px;width:48px;height:48px;border-radius:50%;
  display:grid;place-items:center;cursor:pointer;z-index:1040;
  background:var(--surface-2);border:1px solid var(--line-neon);color:var(--primary);
  opacity:0;pointer-events:none;transform:translateY(12px);
  transition:opacity .24s var(--ease),transform .24s var(--ease),box-shadow .24s var(--ease);
}
.to-top.show{opacity:1;pointer-events:auto;transform:translateY(0)}
.to-top:hover{box-shadow:var(--glow-primary);color:var(--accent);border-color:var(--accent)}

/* ============ 响应式 ============ */
@media (max-width:1199.98px){
  .section{padding:72px 0}
  .hero-grid{grid-template-columns:6fr 5fr;gap:32px}
  .steps{grid-template-columns:repeat(2,1fr)}
  .steps::before{display:none}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:28px}
}
@media (max-width:991.98px){
  .section{padding:56px 0}
  .nav-toggle{display:grid;place-items:center}
  .nav-cta{display:none}
  .nav-menu{
    position:fixed;top:60px;right:0;width:82vw;max-width:360px;
    height:calc(100vh - 60px);margin:0;padding:18px 20px 28px;
    flex-direction:column;align-items:stretch;gap:0;
    background:#0E0919;border-left:1px solid var(--line-neon);
    transform:translateX(102%);transition:transform .26s var(--ease);
    overflow-y:auto;z-index:1031;
  }
  .nav-menu a{padding:0 6px;height:48px;display:flex;align-items:center;font-size:16px;border-bottom:1px solid var(--line);border-radius:0}
  .nav-menu a::after{display:none}
  .nav-menu a.active{color:var(--accent);text-shadow:none}
  body.nav-open .nav-menu{transform:translateX(0)}
  body.nav-open .nav-mask{display:block;opacity:1;pointer-events:auto}
  body.nav-open{overflow:hidden}
  .nav-wrap{height:60px}
  .hero-grid{grid-template-columns:1fr;gap:30px}
  .page-hero{padding-top:8px}
  .duo,.link-cards{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .cta-band{padding:36px 28px}
}
@media (max-width:767.98px){
  .section{padding:44px 0}
  .container{padding-left:16px;padding-right:16px}
  .page-hero h1{font-size:clamp(26px,7vw,32px)}
  .sec-title{font-size:24px}
  .steps{grid-template-columns:1fr;gap:16px}
  .step{padding:22px 18px}
  .info-card .card-body{padding:20px 18px}
  .param-row{grid-template-columns:1fr;gap:6px;padding:18px}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .footer-bottom{flex-direction:column;gap:8px}
  .btn-grad,.btn-ghost{width:100%}
  .cta-band{flex-direction:column;align-items:flex-start}
  .cta-band .cta-actions{width:100%}
  .hero-chips{gap:8px}
  .brand-word{font-size:17px}
  .notice-item{padding:16px}
  .faq-acc .accordion-button{font-size:16.5px;padding:16px 18px}
  .faq-acc .accordion-body{padding:2px 18px 18px}
}
@media (max-width:400px){
  .brand-word em{display:inline}
  .brand-word{font-size:16px}
  .page-hero h1{font-size:26px}
}