/* roulang page: index */
:root{
  --bg-0:#0A0818;
  --bg-1:#120E26;
  --bg-2:#1A1533;
  --bg-3:#241D45;
  --line:rgba(160,140,255,0.16);
  --text-1:#F4F1FF;
  --text-2:#B9AEE0;
  --text-3:#7E74A8;
  --primary:#7C5CFF;
  --primary-hi:#8F73FF;
  --primary-deep:#5B3FE0;
  --accent:#FFB55C;
  --teal:#4FD1C5;
  --radius-card:16px;
  --radius-poster:12px;
  --shadow-card:0 10px 28px rgba(10,7,26,0.5);
  --shadow-hover:0 0 0 1px rgba(124,92,255,0.5),0 16px 40px rgba(94,63,224,0.28);
  --space-block:96px;
}
*,*::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:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:17px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding:0;list-style:none;}
a{color:var(--teal);text-decoration:none;transition:color .2s ease-out;}
a:hover{color:var(--text-1);}
img{display:block;max-width:100%;height:auto;}
button{font-family:inherit;cursor:pointer;}
input,button{font-size:inherit;}
:focus-visible{outline:2px solid var(--teal);outline-offset:2px;}
.container{width:min(1200px,100% - 48px);margin-inline:auto;}
@media (min-width:1440px){.container{width:min(1280px,100% - 80px);}}
.grid-x{margin-left:0;margin-right:0;}
.grid-padding-x{margin-left:-12px;margin-right:-12px;}
.grid-padding-x>.cell{padding-left:12px;padding-right:12px;}

/* ---------- buttons & badges ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 28px;border-radius:999px;border:1px solid transparent;
  font-size:15px;font-weight:600;line-height:1;letter-spacing:.02em;
  transition:transform .2s ease-out,background .2s ease-out,border-color .2s ease-out,color .2s ease-out,box-shadow .2s ease-out;
  min-height:48px;
}
.btn-primary{background:var(--primary);color:#FFFFFF;box-shadow:0 8px 22px rgba(124,92,255,.32);}
.btn-primary:hover{background:var(--primary-hi);color:#FFFFFF;transform:translateY(-2px);}
.btn-primary:active{background:var(--primary-deep);transform:translateY(1px);}
.btn-ghost{background:transparent;color:var(--text-1);border-color:rgba(255,255,255,.22);}
.btn-ghost:hover{border-color:var(--primary);background:rgba(124,92,255,.12);color:var(--text-1);}
.btn-ghost:active{background:rgba(124,92,255,.2);}
.c-badge{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.06em;color:var(--accent);
  border:1px solid rgba(255,181,92,.55);border-radius:999px;
  padding:6px 14px;background:rgba(255,181,92,.06);
  font-variant-numeric:tabular-nums;
}
.c-tag{
  display:inline-block;font-size:12px;letter-spacing:.04em;color:var(--text-2);
  background:var(--bg-3);border:1px solid var(--line);border-radius:999px;
  padding:3px 10px;
}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px;flex-wrap:wrap;}
.sec-title{font-size:32px;line-height:1.35;font-weight:700;position:relative;padding-left:16px;}
.sec-title::before{content:"";position:absolute;left:0;top:.22em;bottom:.22em;width:4px;border-radius:4px;background:var(--primary);}
.sec-desc{font-size:14px;color:var(--text-2);line-height:1.7;margin-top:8px;max-width:640px;}
.sec-link{font-size:14px;color:var(--teal);display:inline-flex;align-items:center;gap:6px;white-space:nowrap;}
.sec-link:hover{text-decoration:underline;text-underline-offset:3px;}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:60;background:var(--bg-1);border-bottom:1px solid var(--line);}
.header-inner{display:flex;align-items:center;gap:24px;height:80px;}
.logo{display:flex;flex-direction:column;line-height:1.15;flex:0 0 auto;min-width:200px;}
.logo-main{font-size:21px;font-weight:700;letter-spacing:.02em;color:var(--text-1);}
.logo-sub{font-size:11px;letter-spacing:.12em;color:var(--text-3);margin-top:4px;}
.nav-search{position:relative;display:flex;align-items:center;flex:1 1 auto;max-width:420px;height:48px;background:#0F0B22;border:1px solid var(--line);border-radius:999px;padding:4px 4px 4px 16px;transition:border-color .2s ease-out,box-shadow .2s ease-out;}
.nav-search:focus-within{border-color:var(--primary);box-shadow:0 0 0 4px rgba(124,92,255,.18);}
.nav-search svg{flex:0 0 auto;color:var(--text-3);}
.nav-search input{flex:1 1 auto;min-width:0;background:transparent;border:0;color:var(--text-1);font-size:14px;padding:0 10px;height:100%;}
.nav-search input::placeholder{color:var(--text-3);}
.nav-search input:focus{outline:none;}
.nav-search button{flex:0 0 auto;height:40px;padding:0 20px;border:0;border-radius:999px;background:var(--primary);color:#fff;font-size:14px;font-weight:600;transition:background .2s ease-out;}
.nav-search button:hover{background:var(--primary-hi);}
.nav-links{display:flex;align-items:center;gap:18px;margin-left:auto;}
.nav-links a{position:relative;font-size:13.5px;color:var(--text-2);padding:6px 0;white-space:nowrap;transition:color .2s ease-out;}
.nav-links a::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--primary);transform:scaleX(0);transform-origin:left;transition:transform .2s ease-out;}
.nav-links a:hover{color:var(--text-1);}
.nav-links a:hover::after,.nav-links a.active::after{transform:scaleX(1);}
.nav-links a.active{color:var(--text-1);}
.nav-cta{flex:0 0 auto;padding:12px 22px;min-height:44px;font-size:14px;}
.menu-toggle{display:none;width:44px;height:44px;align-items:center;justify-content:center;border:1px solid var(--line);border-radius:12px;background:transparent;color:var(--text-1);}
.menu-toggle span{display:block;width:18px;height:2px;background:currentColor;position:relative;}
.menu-toggle span::before,.menu-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:currentColor;}
.menu-toggle span::before{top:-6px;}
.menu-toggle span::after{top:6px;}

/* mobile drawer */
.mobile-drawer{position:fixed;inset:0;z-index:120;background:var(--bg-0);display:none;flex-direction:column;padding:20px;}
.mobile-drawer.is-open{display:flex;}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px;}
.drawer-close{width:44px;height:44px;border-radius:12px;border:1px solid var(--line);background:transparent;color:var(--text-1);font-size:20px;line-height:1;}
.drawer-search{display:flex;align-items:center;height:48px;background:#0F0B22;border:1px solid var(--line);border-radius:999px;padding:0 8px 0 16px;margin-bottom:20px;}
.drawer-search input{flex:1;background:transparent;border:0;color:var(--text-1);font-size:14px;}
.drawer-search input:focus{outline:none;}
.drawer-search button{height:38px;padding:0 16px;border:0;border-radius:999px;background:var(--primary);color:#fff;font-size:13px;}
.drawer-nav{display:flex;flex-direction:column;border-top:1px solid var(--line);}
.drawer-nav a{display:flex;align-items:center;height:48px;border-bottom:1px solid var(--line);font-size:15px;color:var(--text-1);}
.drawer-nav a.active{color:var(--primary);}
.drawer-cta{margin-top:auto;}

/* ---------- hero ---------- */
.b-hero{position:relative;min-height:78vh;display:flex;align-items:flex-end;overflow:hidden;padding-bottom:96px;background:var(--bg-3);}
.hero-media{position:absolute;inset:0;z-index:0;}
.hero-media img{width:100%;height:100%;object-fit:cover;opacity:.6;}
.b-hero::after{
  content:"";position:absolute;inset:0;z-index:1;
  background:
    linear-gradient(180deg,rgba(10,8,24,.92) 0,rgba(10,8,24,.25) 32%,rgba(10,8,24,.8) 76%,var(--bg-0) 100%),
    linear-gradient(90deg,rgba(10,8,24,.96) 0%,rgba(10,8,24,.45) 58%,rgba(10,8,24,.05) 100%);
}
.hero-inner{position:relative;z-index:2;width:100%;}
.hero-copy{max-width:660px;}
.hero-copy h1{font-size:46px;line-height:1.25;font-weight:700;letter-spacing:.01em;margin:18px 0 0;}
.hero-sub{font-size:17px;line-height:1.8;color:var(--text-2);margin-top:16px;max-width:560px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px;}
.hero-meta{display:flex;flex-wrap:wrap;align-items:center;gap:20px;margin-top:26px;font-size:12px;color:var(--text-3);font-variant-numeric:tabular-nums;}
.hero-meta .dot{width:7px;height:7px;border-radius:50%;background:var(--teal);display:inline-block;margin-right:6px;box-shadow:0 0 0 4px rgba(79,209,197,.15);}
.hero-posters{position:absolute;right:0;bottom:110px;z-index:2;display:flex;gap:12px;}
.hero-posters a{width:96px;height:144px;border-radius:var(--radius-poster);overflow:hidden;border:1px solid var(--line);background:var(--bg-3);transition:transform .2s ease-out,box-shadow .2s ease-out;}
.hero-posters a:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);}
.hero-posters img{width:100%;height:100%;object-fit:cover;}

/* ---------- section shell ---------- */
.b-block{padding-block:var(--space-block);}
.b-block.alt{background:var(--bg-1);}

/* ---------- rail ---------- */
.rail{display:flex;gap:20px;overflow-x:auto;scroll-snap-type:x mandatory;padding-bottom:12px;scrollbar-width:thin;scrollbar-color:var(--bg-3) transparent;}
.rail::-webkit-scrollbar{height:6px;}
.rail::-webkit-scrollbar-thumb{background:var(--bg-3);border-radius:999px;}
.poster-card{flex:0 0 220px;scroll-snap-align:start;display:block;}
.poster-media{position:relative;aspect-ratio:2/3;border-radius:var(--radius-poster);overflow:hidden;background:var(--bg-3);border:1px solid var(--line);transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;}
.poster-media img{width:100%;height:100%;object-fit:cover;}
.poster-card:hover .poster-media{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:var(--primary);}
.poster-card h3{font-size:16px;font-weight:600;margin-top:12px;color:var(--text-1);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.poster-card:hover h3{color:var(--text-1);}
.poster-card .poster-labels{display:flex;gap:8px;align-items:center;margin-top:4px;font-size:12px;color:var(--text-3);}
.poster-card::after{content:"";display:block;height:2px;width:0;background:var(--accent);border-radius:2px;transition:width .2s ease-out;margin-top:6px;}
.poster-card:hover::after{width:36px;}

/* ---------- rank ---------- */
.rank-grid{display:grid;grid-template-columns:5fr 7fr;gap:24px;align-items:stretch;}
.rank-list{background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius-card);padding:8px 8px;}
.rank-item{display:flex;align-items:center;gap:18px;padding:16px 14px;border-radius:12px;border-bottom:1px solid var(--line);transition:background .2s ease-out,transform .2s ease-out;}
.rank-item:last-child{border-bottom:0;}
.rank-item:hover{background:var(--bg-3);transform:translateX(4px);}
.rank-num{flex:0 0 56px;font-size:34px;font-weight:800;line-height:1;color:transparent;-webkit-text-stroke:1.5px var(--primary);font-variant-numeric:tabular-nums;}
.rank-body h3{font-size:16px;font-weight:600;color:var(--text-1);}
.rank-body p{font-size:12px;color:var(--text-3);margin-top:4px;}
.rank-feature{display:grid;grid-template-rows:1fr 1fr;gap:24px;}
.big-card{position:relative;display:block;border-radius:var(--radius-card);overflow:hidden;border:1px solid var(--line);background:var(--bg-3);transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;min-height:200px;}
.big-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:var(--primary);}
.big-card img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0;opacity:.85;}
.big-card .big-overlay{position:relative;z-index:2;display:flex;flex-direction:column;justify-content:flex-end;height:100%;padding:22px;background:linear-gradient(180deg,rgba(10,8,24,0) 30%,rgba(10,8,24,.9) 100%);}
.big-card h3{font-size:20px;font-weight:700;color:var(--text-1);}
.big-card p{font-size:13px;color:var(--text-2);margin-top:6px;}

/* ---------- shelf ---------- */
.shelf-grid{display:grid;grid-template-columns:200px 1fr;gap:32px;align-items:start;}
.shelf-tabs{display:flex;flex-direction:column;gap:6px;border-left:1px solid var(--line);}
.shelf-tab{text-align:left;background:transparent;border:0;border-left:3px solid transparent;margin-left:-1px;padding:12px 10px 12px 16px;font-size:14px;color:var(--text-2);transition:color .2s ease-out,border-color .2s ease-out,background .2s ease-out;border-radius:0 8px 8px 0;min-height:44px;}
.shelf-tab:hover{color:var(--text-1);background:rgba(124,92,255,.08);}
.shelf-tab.is-active{color:var(--text-1);border-left-color:var(--primary);background:rgba(124,92,255,.1);}
.shelf-panel{display:none;gap:20px;}
.shelf-panel.is-active{display:flex;}
.wide-card{flex:0 0 300px;scroll-snap-align:start;display:block;background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;}
.wide-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:var(--primary);}
.wide-media{aspect-ratio:16/9;background:var(--bg-3);overflow:hidden;}
.wide-media img{width:100%;height:100%;object-fit:cover;}
.wide-body{padding:16px 18px 18px;}
.wide-body h3{font-size:16px;font-weight:600;color:var(--text-1);}
.wide-body p{font-size:12.5px;line-height:1.7;color:var(--text-3);margin-top:6px;}

/* ---------- news ---------- */
.news-grid{display:flex;flex-wrap:wrap;}
.news-card{display:flex;background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;height:100%;}
.news-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:var(--primary);}
.news-thumb{flex:0 0 40%;background:var(--bg-3);min-height:150px;}
.news-thumb img{width:100%;height:100%;object-fit:cover;}
.news-body{padding:18px 20px;display:flex;flex-direction:column;gap:8px;min-width:0;}
.news-cat{font-size:12px;color:var(--accent);border:1px solid rgba(255,181,92,.45);border-radius:999px;padding:2px 10px;align-self:flex-start;letter-spacing:.04em;}
.news-title{font-size:17px;font-weight:600;line-height:1.5;color:var(--text-1);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-summary{font-size:14px;line-height:1.7;color:var(--text-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-meta{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:12px;color:var(--text-3);font-variant-numeric:tabular-nums;}
.news-more{color:var(--teal);display:inline-flex;align-items:center;gap:4px;transition:transform .2s ease-out;}
.news-card:hover .news-more{transform:translateX(3px);}
.news-empty{width:100%;text-align:center;padding:64px 24px;border:1px dashed var(--line);border-radius:var(--radius-card);background:var(--bg-2);}
.news-empty .star{font-size:28px;color:var(--primary);line-height:1;display:block;margin-bottom:14px;}
.news-empty p{font-size:15px;color:var(--text-2);margin-bottom:18px;}

/* ---------- stats ---------- */
.stats-grid{display:flex;flex-wrap:wrap;}
.stat-card{background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius-card);padding:26px 24px;height:100%;transition:border-color .2s ease-out,background .2s ease-out;}
.stat-card:hover{border-color:var(--primary);background:var(--bg-3);}
.stat-num{font-size:36px;font-weight:800;color:var(--text-1);line-height:1.1;font-variant-numeric:tabular-nums;}
.stat-num span{font-size:15px;font-weight:600;color:var(--primary);margin-left:4px;}
.stat-label{font-size:14px;font-weight:600;color:var(--text-1);margin-top:12px;}
.stat-note{font-size:13px;line-height:1.7;color:var(--text-3);margin-top:6px;}

/* ---------- faq ---------- */
.faq-wrap{max-width:820px;}
.faq-item{background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius-card);margin-bottom:12px;overflow:hidden;transition:border-color .2s ease-out;}
.faq-item:hover{border-color:var(--primary);}
.faq-item summary{list-style:none;cursor:pointer;padding:20px 24px;font-size:16px;font-weight:600;color:var(--text-1);display:flex;align-items:center;justify-content:space-between;gap:16px;}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{content:"+";font-size:20px;line-height:1;color:var(--primary);transition:transform .2s ease-out;}
.faq-item[open] summary::after{transform:rotate(45deg);}
.faq-body{padding:18px 24px 22px;border-top:1px solid var(--line);font-size:15px;line-height:1.85;color:var(--text-2);}

/* ---------- cta ---------- */
.b-cta{background:var(--bg-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line);text-align:center;position:relative;overflow:hidden;}
.b-cta::before{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(124,92,255,.5) 1px,transparent 1px);background-size:36px 36px;opacity:.05;pointer-events:none;}
.b-cta .container{position:relative;z-index:2;}
.b-cta h2{font-size:32px;line-height:1.4;font-weight:700;}
.b-cta p{font-size:16px;color:var(--text-2);margin-top:12px;}
.cta-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-top:32px;}

/* ---------- footer ---------- */
.site-footer{background:var(--bg-1);border-top:1px solid var(--line);padding-top:72px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;padding-bottom:56px;}
.footer-brand .logo{margin-bottom:16px;}
.footer-desc{font-size:14px;line-height:1.8;color:var(--text-2);max-width:260px;}
.footer-status{display:flex;align-items:center;gap:8px;margin-top:16px;font-size:12px;color:var(--text-3);}
.footer-status .dot{width:7px;height:7px;border-radius:50%;background:var(--teal);box-shadow:0 0 0 4px rgba(79,209,197,.15);}
.footer-col h4{font-size:14px;font-weight:600;color:var(--text-1);margin-bottom:16px;letter-spacing:.04em;}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col a{font-size:14px;color:var(--text-2);transition:color .2s ease-out;}
.footer-col a:hover{color:var(--text-1);text-decoration:underline;text-underline-offset:3px;}
.footer-badge-box{margin-top:16px;width:96px;height:96px;border-radius:12px;border:1px solid var(--line);background:var(--bg-2);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;font-size:11px;color:var(--text-3);text-align:center;line-height:1.4;padding:6px;}
.footer-bottom{border-top:1px solid var(--line);padding:24px 0 32px;display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;font-size:13px;color:var(--text-3);}
.footer-bottom .foot-note{display:flex;gap:20px;flex-wrap:wrap;}
.to-top{width:40px;height:40px;border-radius:50%;border:1px solid var(--line);background:transparent;color:var(--text-2);display:inline-flex;align-items:center;justify-content:center;transition:border-color .2s ease-out,color .2s ease-out,transform .2s ease-out;}
.to-top:hover{border-color:var(--primary);color:var(--text-1);transform:translateY(-2px);}

/* ---------- responsive ---------- */
@media (max-width:1023px){
  :root{--space-block:72px;}
  .nav-search{display:none;}
  .nav-links{display:none;}
  .nav-cta{display:none;}
  .menu-toggle{display:inline-flex;}
  .header-inner{height:64px;justify-content:space-between;gap:12px;}
  .logo{min-width:0;}
  .logo-main{font-size:19px;}
  .hero-copy h1{font-size:36px;}
  .hero-posters{display:none;}
  .b-hero{min-height:70vh;padding-bottom:72px;}
  .rank-grid{grid-template-columns:1fr;}
  .rank-feature{grid-template-rows:none;grid-template-columns:1fr 1fr;}
  .shelf-grid{grid-template-columns:1fr;gap:20px;}
  .shelf-tabs{flex-direction:row;overflow-x:auto;border-left:0;border-bottom:1px solid var(--line);gap:4px;padding-bottom:4px;}
  .shelf-tab{border-left:0;border-bottom:3px solid transparent;margin-left:0;padding:10px 14px;border-radius:8px 8px 0 0;white-space:nowrap;}
  .shelf-tab.is-active{border-bottom-color:var(--primary);}
  .poster-card{flex:0 0 180px;}
  .wide-card{flex:0 0 260px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .sec-title{font-size:26px;}
  .b-cta h2{font-size:26px;}
}
@media (max-width:767px){
  :root{--space-block:56px;}
  body{font-size:16px;}
  .container{width:min(1200px,100% - 32px);}
  .hero-copy h1{font-size:30px;}
  .hero-sub{font-size:15px;}
  .b-hero{min-height:62vh;padding-bottom:56px;}
  .hero-actions .btn{flex:1 1 100%;}
  .rank-feature{grid-template-columns:1fr;grid-template-rows:1fr 1fr;}
  .poster-card{flex:0 0 150px;}
  .wide-card{flex:0 0 240px;}
  .news-card{flex-direction:column;}
  .news-thumb{flex:0 0 auto;width:100%;aspect-ratio:16/9;min-height:0;}
  .sec-head{flex-direction:column;align-items:flex-start;gap:12px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .b-cta h2{font-size:24px;}
  .cta-actions .btn{width:100%;}
  .stat-num{font-size:30px;}
}
@media (max-width:520px){
  .hero-copy h1{font-size:27px;}
  .sec-title{font-size:23px;}
  .rank-num{flex:0 0 44px;font-size:26px;}
  .news-body{padding:16px;}
}

/* roulang page: article */
:root{
  --bg-0:#0A0818;
  --bg-1:#120E26;
  --bg-2:#1A1533;
  --bg-3:#241D45;
  --line:rgba(160,140,255,.16);
  --text-1:#F4F1FF;
  --text-2:#B9AEE0;
  --text-3:#7E74A8;
  --primary:#7C5CFF;
  --primary-deep:#5B3FE0;
  --primary-soft:#8F73FF;
  --accent:#FFB55C;
  --teal:#4FD1C5;
  --paper:#FAF9FF;
  --paper-text:#221C3A;
  --paper-line:#E4E0F5;
  --radius-card:16px;
  --radius-img:12px;
  --radius-pill:999px;
  --shadow:0 10px 28px rgba(10,7,26,.5);
  --shadow-hover:0 0 0 1px rgba(124,92,255,.5),0 16px 40px rgba(94,63,224,.28);
  --container:1200px;
  --reading:820px;
  --space-block:96px;
  --font:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font);
  font-size:17px;
  line-height:1.85;
  color:var(--text-1);
  background:var(--bg-0);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,h5,h6{margin:0;font-family:var(--font);font-weight:700;line-height:1.3;color:var(--text-1)}
p{margin:0 0 1em}
ul,ol{margin:0;padding:0;list-style:none}
a{color:var(--teal);text-decoration:none;transition:color .2s ease-out}
a:hover{color:#7FE6DC}
img{max-width:100%;display:block;border:0}
button{font-family:var(--font);cursor:pointer}
input{font-family:var(--font)}
:focus-visible{outline:2px solid var(--teal);outline-offset:2px}
::selection{background:rgba(124,92,255,.45);color:#fff}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:var(--bg-1);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;gap:24px;height:80px}
.logo{display:flex;flex-direction:column;justify-content:center;line-height:1.1;flex:none}
.logo-main{font-size:21px;font-weight:700;letter-spacing:.06em;color:var(--text-1)}
.logo-sub{font-size:11px;letter-spacing:.12em;color:var(--text-3);margin-top:3px}
.logo:hover .logo-main{color:var(--primary-soft)}
.nav-search{
  position:relative;flex:1 1 auto;max-width:560px;
  display:flex;align-items:center;
  height:48px;padding:4px 4px 4px 16px;
  background:#0F0B22;
  border:1px solid var(--line);
  border-radius:var(--radius-pill);
  transition:border-color .2s ease-out,box-shadow .2s ease-out;
}
.nav-search:focus-within{border-color:var(--primary);box-shadow:0 0 0 4px rgba(124,92,255,.2)}
.nav-search .s-ico{flex:none;width:18px;height:18px;color:var(--text-3);margin-right:10px}
.nav-search input{
  flex:1 1 auto;min-width:0;height:100%;background:none;border:0;outline:none;
  color:var(--text-1);font-size:14px;
}
.nav-search input::placeholder{color:var(--text-3)}
.nav-search button{
  flex:none;height:40px;padding:0 20px;border:0;border-radius:var(--radius-pill);
  background:var(--primary);color:#fff;font-size:14px;font-weight:500;
  transition:background .2s ease-out;
}
.nav-search button:hover{background:var(--primary-soft)}
.nav-links{display:flex;align-items:center;gap:26px;margin-left:auto}
.nav-links a{position:relative;display:inline-block;padding:6px 0;font-size:14px;color:var(--text-2);white-space:nowrap;transition:color .2s ease-out}
.nav-links a:hover{color:var(--text-1)}
.nav-links a.active{color:var(--text-1)}
.nav-links a.active::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--primary)}
.nav-cta{flex:none;padding:11px 22px;font-size:14px}
.nav-toggle{
  display:none;flex:none;width:44px;height:44px;margin-left:auto;
  background:transparent;border:1px solid var(--line);border-radius:12px;color:var(--text-1);
  align-items:center;justify-content:center;font-size:18px;line-height:1;
}
.nav-toggle:hover{border-color:var(--primary)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 28px;border:1px solid transparent;border-radius:var(--radius-pill);
  font-size:15px;font-weight:500;line-height:1.2;text-align:center;
  transition:transform .2s ease-out,background .2s ease-out,border-color .2s ease-out,color .2s ease-out,box-shadow .2s ease-out;
}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-soft);color:#fff;transform:translateY(-2px);box-shadow:0 12px 28px rgba(94,63,224,.35)}
.btn-primary:active{background:var(--primary-deep);transform:translateY(1px)}
.btn-ghost{background:transparent;border-color:rgba(255,255,255,.22);color:var(--text-1)}
.btn-ghost:hover{border-color:var(--primary);background:rgba(124,92,255,.12);color:var(--text-1);transform:translateY(-2px)}
.btn-block{width:100%}

/* ---------- 移动抽屉 ---------- */
.drawer-mask{
  position:fixed;inset:0;z-index:90;background:rgba(6,4,18,.72);
  opacity:0;visibility:hidden;transition:opacity .2s ease-out,visibility .2s ease-out;
}
.drawer-mask.open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;bottom:0;z-index:95;width:min(360px,86vw);
  background:var(--bg-1);border-left:1px solid var(--line);
  padding:20px;display:flex;flex-direction:column;gap:20px;
  transform:translateX(100%);transition:transform .24s ease-out;overflow-y:auto;
}
.drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between}
.drawer-close{width:44px;height:44px;border:1px solid var(--line);border-radius:12px;background:transparent;color:var(--text-1);font-size:18px}
.drawer-close:hover{border-color:var(--primary)}
.drawer-search{display:flex;align-items:center;height:48px;padding:0 16px;background:#0F0B22;border:1px solid var(--line);border-radius:var(--radius-pill)}
.drawer-search input{flex:1;background:none;border:0;outline:none;color:var(--text-1);font-size:14px}
.drawer-search input::placeholder{color:var(--text-3)}
.drawer-nav{display:flex;flex-direction:column}
.drawer-nav a{display:flex;align-items:center;height:48px;padding:0 4px;font-size:15px;color:var(--text-2);border-bottom:1px solid var(--line)}
.drawer-nav a:hover{color:var(--text-1)}

/* ---------- 文章页头 ---------- */
.b-article-head{
  position:relative;
  padding:56px 0 132px;
  background-image:linear-gradient(180deg,rgba(10,8,24,.55) 0%,rgba(10,8,24,.9) 62%,var(--bg-0) 100%),url("/assets/images/backpic/back-2.webp");
  background-size:cover;
  background-position:center;
  border-bottom:1px solid var(--line);
}
.crumbs{display:flex;align-items:center;gap:10px;font-size:14px;color:var(--text-3);margin-bottom:26px;flex-wrap:wrap}
.crumbs a{color:var(--text-3)}
.crumbs a:hover{color:var(--teal)}
.crumbs .sep{color:rgba(160,140,255,.4)}
.crumbs .current{max-width:520px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--text-2)}
.article-head{max-width:var(--reading);margin:0 auto}
.badge{
  display:inline-flex;align-items:center;height:28px;padding:0 14px;
  border:1px solid rgba(255,181,92,.5);border-radius:var(--radius-pill);
  color:var(--accent);font-size:12px;letter-spacing:.06em;background:transparent;
}
.article-head h1{
  margin:18px 0 0;
  font-size:46px;line-height:1.25;letter-spacing:.01em;
  color:var(--text-1);
  text-shadow:0 8px 30px rgba(6,4,18,.6);
}
.meta-row{display:flex;align-items:center;flex-wrap:wrap;gap:12px;margin-top:22px;font-size:14px;color:var(--text-3)}
.meta-row .dot-sep{width:4px;height:4px;border-radius:50%;background:rgba(160,140,255,.45)}
.meta-row .live{display:inline-flex;align-items:center;gap:6px;color:var(--teal)}
.meta-row .live i{width:6px;height:6px;border-radius:50%;background:var(--teal);box-shadow:0 0 0 3px rgba(79,209,197,.18)}

/* ---------- 正文纸面 ---------- */
.b-article-body{padding:0 0 96px;margin-top:-88px}
.paper{
  max-width:var(--reading);margin:0 auto;
  background:var(--paper);color:var(--paper-text);
  border-radius:var(--radius-card);
  padding:56px;
  box-shadow:0 22px 60px rgba(6,4,18,.6);
}
.read-hint{
  max-width:var(--reading);margin:0 auto 18px;
  font-size:13px;color:var(--text-3);text-align:center;line-height:1.7;
}
.article-body{font-size:17px;line-height:1.9}
.article-body > *:first-child{margin-top:0}
.article-body p{margin:0 0 1.4em}
.article-body h2{
  font-size:28px;line-height:1.35;font-weight:700;color:#1A1436;
  margin:2.2em 0 .8em;padding-left:14px;border-left:4px solid var(--primary);
}
.article-body h3{font-size:21px;line-height:1.45;font-weight:600;color:#241C44;margin:1.9em 0 .7em}
.article-body h4{font-size:18px;font-weight:600;color:#2B2350;margin:1.6em 0 .6em}
.article-body ul,.article-body ol{margin:0 0 1.4em;padding-left:1.5em;list-style:disc}
.article-body ol{list-style:decimal}
.article-body li{margin-bottom:.5em;line-height:1.9}
.article-body li::marker{color:var(--primary)}
.article-body strong{color:#1A1436;font-weight:700}
.article-body blockquote{
  margin:1.6em 0;padding:16px 22px;
  background:#F1EDFF;border-left:3px solid var(--primary);
  border-radius:0 12px 12px 0;color:#3A2F63;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:var(--radius-img);margin:1.6em auto;box-shadow:0 10px 26px rgba(34,28,58,.14)}
.article-body figure{margin:1.6em 0}
.article-body figcaption{font-size:13px;color:#6B6390;text-align:center;margin-top:10px}
.article-body table{width:100%;display:block;overflow-x:auto;border-collapse:collapse;margin:1.6em 0;font-size:15px}
.article-body th,.article-body td{border:1px solid var(--paper-line);padding:12px 14px;text-align:left;line-height:1.7}
.article-body th{background:#EFEAFF;color:#2B2350;font-weight:600;white-space:nowrap}
.article-body a{color:#5B3FE0;text-decoration:underline;text-underline-offset:3px}
.article-body a:hover{color:#3E28B0}
.article-body hr{border:0;border-top:1px solid var(--paper-line);margin:2em 0}
.article-body code{background:#F1EDFF;color:#3E28B0;padding:2px 6px;border-radius:6px;font-size:.92em}
.article-empty{text-align:center;padding:24px 0 8px}
.article-empty h2{font-size:26px;color:#1A1436;margin-bottom:12px}
.article-empty p{color:#5E5680;margin-bottom:26px}

/* ---------- 标签 ---------- */
.tag-row{max-width:var(--reading);margin:30px auto 0;display:flex;flex-wrap:wrap;gap:10px;align-items:center}
.tag-row .tag{
  display:inline-flex;align-items:center;height:32px;padding:0 16px;
  border:1px solid rgba(255,181,92,.45);border-radius:var(--radius-pill);
  color:var(--accent);font-size:12px;letter-spacing:.06em;
  transition:border-color .2s ease-out,background .2s ease-out;
}
.tag-row .tag:hover{border-color:var(--accent);background:rgba(255,181,92,.1);color:var(--accent)}
.tag-row .tag-label{font-size:12px;color:var(--text-3);letter-spacing:.06em;margin-right:4px}

/* ---------- 相关推荐 ---------- */
.b-related{padding:var(--space-block) 0;background:var(--bg-0)}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:32px;flex-wrap:wrap}
.sec-head h2{font-size:32px;line-height:1.35}
.sec-head p{margin:10px 0 0;font-size:14px;color:var(--text-2);line-height:1.7}
.sec-more{display:inline-flex;align-items:center;gap:6px;font-size:14px;color:var(--teal)}
.sec-more:hover{gap:10px}
.rel-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.rel-card{
  display:flex;flex-direction:column;overflow:hidden;
  background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius-card);
  transition:transform .2s ease-out,border-color .2s ease-out,box-shadow .2s ease-out;
}
.rel-card:hover{transform:translateY(-4px);border-color:var(--primary);box-shadow:var(--shadow-hover)}
.rel-card .thumb{aspect-ratio:16/9;background:var(--bg-3);overflow:hidden}
.rel-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease-out}
.rel-card:hover .thumb img{transform:scale(1.04)}
.rel-card .body{padding:18px 20px 22px;display:flex;flex-direction:column;gap:8px}
.rel-card .body h3{font-size:17px;font-weight:600;line-height:1.45;color:var(--text-1)}
.rel-card .body span{font-size:12px;color:var(--text-3);letter-spacing:.04em}
.rel-card .arrow{font-size:13px;color:var(--teal);margin-top:2px}

/* ---------- CTA ---------- */
.b-cta{
  position:relative;padding:96px 0;text-align:center;
  background:var(--bg-1);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.b-cta::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(circle at 22% 20%,rgba(124,92,255,.22),transparent 46%),
             radial-gradient(circle at 78% 80%,rgba(255,181,92,.12),transparent 42%);
}
.b-cta .container{position:relative;z-index:1}
.b-cta h2{font-size:32px;margin-bottom:14px}
.b-cta p{font-size:15px;color:var(--text-2);margin-bottom:32px}
.cta-actions{display:flex;justify-content:center;gap:14px;flex-wrap:wrap}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--bg-1);border-top:1px solid var(--line);padding:64px 0 0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;padding-bottom:48px}
.footer-brand .logo{margin-bottom:16px}
.footer-desc{font-size:14px;line-height:1.75;color:var(--text-2);max-width:280px;margin-bottom:18px}
.footer-status{display:inline-flex;align-items:center;gap:8px;font-size:12px;color:var(--text-3);letter-spacing:.04em}
.footer-status .dot{width:7px;height:7px;border-radius:50%;background:var(--teal);box-shadow:0 0 0 3px rgba(79,209,197,.16)}
.footer-col h4{font-size:14px;font-weight:600;color:var(--text-1);margin-bottom:18px;letter-spacing:.04em}
.footer-col ul{display:flex;flex-direction:column;gap:12px}
.footer-col a{font-size:14px;color:var(--text-2)}
.footer-col a:hover{color:var(--text-1);text-decoration:underline;text-underline-offset:4px}
.footer-badge-box{display:flex;gap:8px;margin-top:18px;flex-wrap:wrap}
.footer-badge-box span{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;
  font-size:12px;color:var(--text-3);
  border:1px solid var(--line);border-radius:var(--radius-pill);
}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;
  padding:20px 0;border-top:1px solid var(--line);
  font-size:13px;color:var(--text-3);
}
.foot-note{display:flex;gap:18px;flex-wrap:wrap;font-size:13px;color:var(--text-3)}
.to-top{
  width:40px;height:40px;border-radius:50%;
  border:1px solid var(--line);background:transparent;color:var(--text-2);
  font-size:15px;line-height:1;transition:border-color .2s ease-out,color .2s ease-out,transform .2s ease-out;
}
.to-top:hover{border-color:var(--primary);color:var(--text-1);transform:translateY(-2px)}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .nav-links{gap:18px}
  .nav-search{max-width:360px}
}
@media (max-width:1023px){
  .header-inner{height:64px;gap:14px}
  .nav-links,.nav-cta,.nav-search{display:none}
  .nav-toggle{display:inline-flex}
  .logo-main{font-size:19px}
  .b-article-head{padding:40px 0 116px}
  .article-head h1{font-size:36px}
  .paper{padding:40px 32px}
  .article-body h2{font-size:26px}
  .article-body h3{font-size:20px}
  .b-related{padding:72px 0}
  .sec-head h2{font-size:26px}
  .rel-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .b-cta{padding:72px 0}
  .b-cta h2{font-size:26px}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px}
}
@media (max-width:767px){
  .container{padding:0 18px}
  .b-article-head{padding:32px 0 104px}
  .article-head h1{font-size:30px;margin-top:14px}
  .meta-row{font-size:13px;gap:10px}
  .b-article-body{margin-top:-70px;padding-bottom:64px}
  .paper{padding:28px 20px;border-radius:14px}
  .article-body{font-size:16px;line-height:1.85}
  .article-body h2{font-size:22px;padding-left:12px;margin:1.9em 0 .7em}
  .article-body h3{font-size:18px}
  .article-body blockquote{padding:14px 16px}
  .read-hint{font-size:12px;padding:0 4px}
  .rel-grid{grid-template-columns:1fr;gap:16px}
  .b-related{padding:56px 0}
  .sec-head{margin-bottom:24px}
  .sec-head h2{font-size:23px}
  .b-cta{padding:56px 0}
  .b-cta h2{font-size:23px}
  .cta-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:36px}
  .footer-desc{max-width:none}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:14px}
  .to-top{align-self:flex-end}
  .crumbs .current{max-width:200px}
}
@media (max-width:520px){
  .article-head h1{font-size:26px}
  .paper{padding:24px 16px}
  .article-body h2{font-size:20px}
  .tag-row{gap:8px}
}

/* roulang page: category1 */
:root{
  --bg-0:#0A0818;
  --bg-1:#120E26;
  --bg-2:#1A1533;
  --bg-3:#241D45;
  --line:rgba(160,140,255,.16);
  --text-1:#F4F1FF;
  --text-2:#B9AEE0;
  --text-3:#7E74A8;
  --primary:#7C5CFF;
  --primary-hover:#8F73FF;
  --primary-deep:#5B3FE0;
  --accent:#FFB55C;
  --teal:#4FD1C5;
  --radius:16px;
  --radius-sm:12px;
  --radius-lg:20px;
  --shadow:0 10px 28px rgba(10,7,26,.5);
  --shadow-hover:0 0 0 1px rgba(124,92,255,.5),0 16px 40px rgba(94,63,224,.28);
  --container:1200px;
  --gap:24px;
  --section:96px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--text-1);
  font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:17px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
ul,ol,li{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
a{color:var(--teal);text-decoration:none;transition:color .2s ease-out}
a:hover{text-decoration:underline;text-underline-offset:3px}
img{max-width:100%;display:block}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--teal);outline-offset:2px}
::selection{background:rgba(124,92,255,.35);color:#fff}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:var(--section) 0}
.section-tight{padding:64px 0}

/* ---------- 按钮 ---------- */
.c-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:13px 28px;border-radius:999px;
  font-size:15px;font-weight:600;line-height:1.2;
  text-decoration:none;border:1px solid transparent;cursor:pointer;
  transition:transform .2s ease-out,background .2s ease-out,border-color .2s ease-out,box-shadow .2s ease-out,color .2s ease-out;
}
.c-btn:hover{text-decoration:none;transform:translateY(-2px)}
.c-btn:active{transform:translateY(1px)}
.c-btn-primary{background:var(--primary);color:#fff;box-shadow:0 8px 24px rgba(124,92,255,.26)}
.c-btn-primary:hover{background:var(--primary-hover);box-shadow:0 12px 30px rgba(124,92,255,.34)}
.c-btn-primary:active{background:var(--primary-deep)}
.c-btn-ghost{background:transparent;border-color:rgba(255,255,255,.22);color:var(--text-1)}
.c-btn-ghost:hover{border-color:var(--primary);background:rgba(124,92,255,.12)}
.c-btn-lg{width:100%;height:56px;font-size:17px;padding:0 28px}
.c-link-more{color:var(--teal);font-size:14px;font-weight:500;display:inline-flex;align-items:center;gap:6px}
.c-link-more:hover{text-decoration:underline;text-underline-offset:3px}
.c-link-more svg{transition:transform .2s ease-out}
.c-link-more:hover svg{transform:translateX(3px)}

/* ---------- 徽章 / 标签 ---------- */
.c-badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;
  border:1px solid rgba(255,181,92,.45);
  background:rgba(255,181,92,.06);
  color:var(--accent);
  font-size:12px;letter-spacing:.06em;line-height:1.6;
}
.c-tag{
  display:inline-block;padding:4px 12px;border-radius:999px;
  background:var(--bg-3);border:1px solid var(--line);
  color:var(--text-2);font-size:12px;letter-spacing:.06em;
}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:120;
  background:var(--bg-1);
  border-bottom:1px solid var(--line);
}
.header-inner{
  display:flex;align-items:center;gap:28px;height:80px;
}
.logo{display:flex;flex-direction:column;line-height:1.15;text-decoration:none;flex:0 0 auto}
.logo:hover{text-decoration:none}
.logo-main{font-size:21px;font-weight:700;color:var(--text-1);letter-spacing:.08em}
.logo-sub{font-size:11px;letter-spacing:.12em;color:var(--text-2);margin-top:3px}
.header-search{flex:1 1 auto;max-width:560px}
.search-box{
  display:flex;align-items:center;height:48px;padding:0 6px 0 16px;
  background:#0F0B22;border:1px solid var(--line);border-radius:999px;
  transition:border-color .2s ease-out,box-shadow .2s ease-out;
}
.search-box:focus-within{border-color:var(--primary);box-shadow:0 0 0 4px rgba(124,92,255,.22)}
.search-box svg{flex:0 0 auto;color:var(--text-3)}
.search-box input{
  flex:1 1 auto;min-width:0;height:100%;
  background:transparent;border:0;outline:none;
  color:var(--text-1);font-size:14px;padding:0 12px;
}
.search-box input::placeholder{color:var(--text-3)}
.search-box input::-webkit-search-cancel-button{display:none}
.search-btn{
  flex:0 0 auto;height:36px;padding:0 18px;border:0;border-radius:999px;
  background:var(--primary);color:#fff;font-size:14px;font-weight:600;cursor:pointer;
  transition:background .2s ease-out;
}
.search-btn:hover{background:var(--primary-hover)}
.nav-links{display:flex;align-items:center;gap:28px}
.nav-links a{
  position:relative;display:inline-block;padding:6px 0;
  font-size:14px;color:var(--text-2);text-decoration:none;
  transition:color .2s ease-out;
}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;
  background:var(--primary);transform:scaleX(0);transform-origin:left;
  transition:transform .2s ease-out;
}
.nav-links a:hover{color:var(--text-1)}
.nav-links a:hover::after{transform:scaleX(1)}
.nav-links a.active{color:var(--text-1);font-weight:600}
.nav-links a.active::after{transform:scaleX(1)}
.header-cta{flex:0 0 auto;padding:11px 22px;font-size:14px}
.menu-toggle{
  display:none;flex:0 0 auto;width:44px;height:44px;margin-left:auto;
  align-items:center;justify-content:center;
  background:var(--bg-2);border:1px solid var(--line);border-radius:12px;
  color:var(--text-1);cursor:pointer;
}
.mobile-search{display:none;padding:0 24px 16px}
.mobile-search.open{display:block}

/* 抽屉 */
.drawer{
  position:fixed;inset:0;z-index:300;
  background:var(--bg-0);
  display:none;flex-direction:column;
  padding:20px 24px 32px;
  overflow-y:auto;
}
.drawer.open{display:flex}
.drawer-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px}
.drawer-close{
  width:44px;height:44px;display:flex;align-items:center;justify-content:center;
  background:var(--bg-2);border:1px solid var(--line);border-radius:12px;
  color:var(--text-1);font-size:20px;cursor:pointer;
}
.drawer-nav{display:flex;flex-direction:column;gap:4px;margin-bottom:24px}
.drawer-nav a{
  display:flex;align-items:center;min-height:48px;padding:0 14px;
  border-radius:12px;color:var(--text-1);font-size:16px;text-decoration:none;
  border:1px solid transparent;
}
.drawer-nav a:hover{background:var(--bg-2);border-color:var(--line)}
.drawer-nav a.active{background:rgba(124,92,255,.14);border-color:rgba(124,92,255,.4);color:#fff;font-weight:600}
.drawer-foot{margin-top:auto}
body.drawer-open{overflow:hidden}

/* ---------- 页面头部 ---------- */
.b-page-hero{
  position:relative;
  padding:72px 0 56px;
  background-color:var(--bg-2);
  background-image:url('/assets/images/backpic/back-1.webp');
  background-size:cover;
  background-position:center 30%;
  overflow:hidden;
  border-bottom:1px solid var(--line);
}
.b-page-hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(10,8,24,.9) 0%,rgba(10,8,24,.78) 42%,rgba(10,8,24,.96) 100%);
}
.b-page-hero::after{
  content:"";position:absolute;left:0;top:0;bottom:0;width:62%;
  background:linear-gradient(90deg,rgba(10,8,24,.86) 0%,rgba(10,8,24,.4) 62%,rgba(10,8,24,0) 100%);
}
.b-page-hero .container{position:relative;z-index:2;max-width:1080px}
.c-crumb{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--text-3);margin-bottom:20px;flex-wrap:wrap}
.c-crumb a{color:var(--text-3)}
.c-crumb a:hover{color:var(--text-1)}
.c-crumb span.sep{color:rgba(160,140,255,.4)}
.c-crumb .current{color:var(--text-2)}
.b-page-hero h1{
  font-size:46px;font-weight:700;line-height:1.25;letter-spacing:.01em;
  color:var(--text-1);margin:18px 0 16px;max-width:760px;
}
.b-page-hero .lead{font-size:17px;line-height:1.8;color:var(--text-2);max-width:640px}
.hero-meta{
  display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:26px;
  font-size:12px;color:var(--text-3);font-variant-numeric:tabular-nums;
}
.hero-meta i{
  display:inline-block;width:7px;height:7px;border-radius:50%;
  background:var(--teal);margin-right:7px;vertical-align:middle;
  box-shadow:0 0 0 3px rgba(79,209,197,.16);
}

/* ---------- 区块标题 ---------- */
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px;flex-wrap:wrap}
.section-head h2{
  font-size:32px;font-weight:700;line-height:1.35;color:var(--text-1);
  padding-left:16px;border-left:4px solid var(--primary);
}
.section-head p{font-size:14px;color:var(--text-2);margin-top:10px;max-width:640px}

/* ---------- 步骤流 ---------- */
.b-steps{max-width:900px}
.c-step{position:relative;display:grid;grid-template-columns:96px minmax(0,1fr);gap:28px;padding-bottom:44px}
.c-step::before{
  content:"";position:absolute;left:47px;top:62px;bottom:6px;
  border-left:1px dashed rgba(160,140,255,.32);
}
.c-step:last-child{padding-bottom:0}
.c-step:last-child::before{display:none}
.c-step-num{
  font-size:40px;font-weight:800;line-height:1;
  color:transparent;-webkit-text-stroke:1.5px var(--primary);
  font-variant-numeric:tabular-nums;
  padding-top:2px;
}
.c-step-body h3{font-size:22px;font-weight:600;line-height:1.45;color:var(--text-1);margin-bottom:12px}
.c-step-body p{font-size:16px;line-height:1.85;color:var(--text-2)}
.c-step-link{display:inline-flex;align-items:center;gap:6px;margin-top:12px;font-size:14px;color:var(--teal)}
.c-step-link:hover{text-decoration:underline;text-underline-offset:3px}

/* ---------- 入口汇总卡 ---------- */
.entry-card{
  background:var(--bg-2);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:40px;
  box-shadow:var(--shadow);
}
.entry-card h3{font-size:24px;font-weight:700;color:var(--text-1);margin-bottom:8px}
.entry-card .entry-desc{font-size:15px;color:var(--text-2);margin-bottom:26px}
.alt-list{margin-top:26px;border-top:1px solid var(--line)}
.alt-list li{border-bottom:1px solid var(--line)}
.alt-list a{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:56px;padding:14px 4px;
  color:var(--text-1);font-size:15px;text-decoration:none;
  transition:color .2s ease-out,padding-left .2s ease-out;
}
.alt-list a:hover{color:var(--primary-hover);padding-left:10px;text-decoration:none}
.alt-list .alt-sub{display:block;font-size:12px;color:var(--text-3);margin-top:2px}
.alt-list svg{flex:0 0 auto;color:var(--text-3);transition:transform .2s ease-out,color .2s ease-out}
.alt-list a:hover svg{transform:translateX(3px);color:var(--primary-hover)}
.note-bar{
  margin-top:26px;padding:16px 20px;
  background:rgba(255,181,92,.07);
  border-left:3px solid var(--accent);
  border-radius:0 12px 12px 0;
  font-size:14px;line-height:1.75;color:var(--text-2);
}
.note-bar strong{color:var(--accent);font-weight:600}

/* ---------- 图文块 ---------- */
.b-split{display:grid;grid-template-columns:5fr 7fr;gap:56px;align-items:center}
.split-figure{
  position:relative;border-radius:var(--radius);overflow:hidden;
  border:1px solid var(--line);background:var(--bg-3);
  box-shadow:var(--shadow);
  aspect-ratio:16/10;
}
.split-figure img{width:100%;height:100%;object-fit:cover}
.split-figure::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(10,8,24,0) 55%,rgba(10,8,24,.62) 100%);
}
.split-text h2{
  font-size:32px;font-weight:700;line-height:1.35;color:var(--text-1);margin-bottom:16px;
}
.split-text p.desc{font-size:16px;color:var(--text-2);margin-bottom:22px}
.feature-list{display:flex;flex-direction:column;gap:16px}
.feature-list li{display:grid;grid-template-columns:28px minmax(0,1fr);gap:14px;align-items:start}
.feature-list .idx{
  display:inline-flex;align-items:center;justify-content:center;
  width:28px;height:28px;border-radius:999px;
  border:1px solid rgba(124,92,255,.45);color:var(--primary);
  font-size:12px;font-weight:700;font-variant-numeric:tabular-nums;
  margin-top:4px;
}
.feature-list h4{font-size:16px;font-weight:600;color:var(--text-1);margin-bottom:4px}
.feature-list p{font-size:14px;line-height:1.75;color:var(--text-2)}

/* ---------- 检查清单卡 ---------- */
.grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:var(--gap)}
.c-check{
  background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 22px;box-shadow:var(--shadow);
  transition:transform .2s ease-out,border-color .2s ease-out,box-shadow .2s ease-out;
}
.c-check:hover{transform:translateY(-4px);border-color:var(--primary);box-shadow:var(--shadow-hover)}
.c-check .ico{
  display:inline-flex;align-items:center;justify-content:center;
  width:44px;height:44px;border-radius:12px;
  background:var(--bg-3);color:var(--primary);margin-bottom:16px;
}
.c-check h3{font-size:17px;font-weight:600;color:var(--text-1);margin-bottom:8px}
.c-check p{font-size:14px;line-height:1.75;color:var(--text-2)}

/* ---------- 现象处理面板 ---------- */
.issue-panel{
  background:var(--bg-2);border:1px solid var(--line);
  border-radius:var(--radius-lg);padding:8px 32px;box-shadow:var(--shadow);
}
.c-issue{
  display:grid;grid-template-columns:220px minmax(0,1fr) 100px;
  gap:24px;align-items:start;padding:26px 0;
  border-bottom:1px solid var(--line);
}
.c-issue:last-child{border-bottom:0}
.c-issue-tag{
  display:inline-block;padding:4px 14px;border-radius:999px;
  border:1px solid rgba(255,181,92,.42);background:rgba(255,181,92,.06);
  color:var(--accent);font-size:13px;line-height:1.7;
}
.c-issue p{font-size:15px;line-height:1.8;color:var(--text-2)}
.c-issue p strong{color:var(--text-1);font-weight:600}
.c-issue-link{font-size:14px;color:var(--teal);text-align:right;white-space:nowrap}

/* ---------- FAQ ---------- */
.b-faq{max-width:820px}
.c-faq-item{
  background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius);
  margin-bottom:12px;overflow:hidden;
  transition:border-color .2s ease-out,background .2s ease-out;
}
.c-faq-item:hover{border-color:var(--primary)}
.c-faq-item.open{border-color:rgba(124,92,255,.5)}
.c-faq-q{
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  width:100%;padding:20px 24px;text-align:left;cursor:pointer;
  background:transparent;border:0;color:var(--text-1);
  font-size:16px;font-weight:600;line-height:1.6;
}
.c-faq-q .plus{
  flex:0 0 auto;width:20px;height:20px;position:relative;
  transition:transform .2s ease-out;
}
.c-faq-q .plus::before,
.c-faq-q .plus::after{
  content:"";position:absolute;left:50%;top:50%;
  background:var(--primary);border-radius:2px;
  transform:translate(-50%,-50%);
}
.c-faq-q .plus::before{width:14px;height:2px}
.c-faq-q .plus::after{width:2px;height:14px;transition:opacity .2s ease-out}
.c-faq-item.open .c-faq-q .plus{transform:rotate(180deg)}
.c-faq-item.open .c-faq-q .plus::after{opacity:0}
.c-faq-a{display:none;padding:0 24px 22px;border-top:1px solid var(--line);margin-top:0}
.c-faq-item.open .c-faq-a{display:block}
.c-faq-a p{font-size:15px;line-height:1.85;color:var(--text-2);padding-top:16px}

/* ---------- CTA ---------- */
.b-cta{
  position:relative;
  background:var(--bg-1);
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  padding:80px 0;text-align:center;overflow:hidden;
}
.b-cta::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
  opacity:.14;
}
.b-cta .container{position:relative;z-index:2}
.b-cta h2{font-size:32px;font-weight:700;color:var(--text-1);margin-bottom:12px}
.b-cta p{font-size:15px;color:var(--text-2);max-width:520px;margin:0 auto 28px}
.cta-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--bg-1);border-top:1px solid var(--line);padding:72px 0 32px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px}
.footer-brand .logo{margin-bottom:16px}
.footer-desc{font-size:14px;line-height:1.75;color:var(--text-2);max-width:280px;margin-bottom:18px}
.footer-status{display:flex;align-items:center;font-size:13px;color:var(--text-3)}
.footer-status .dot{
  display:inline-block;width:8px;height:8px;border-radius:50%;
  background:var(--teal);margin-right:8px;
  box-shadow:0 0 0 3px rgba(79,209,197,.18);
}
.footer-col h4{font-size:15px;font-weight:600;color:var(--text-1);margin-bottom:16px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{font-size:14px;color:var(--text-2);text-decoration:none}
.footer-col a:hover{color:var(--text-1);text-decoration:underline;text-underline-offset:3px}
.footer-badge-box{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.footer-badge-box span{
  font-size:12px;color:var(--text-2);
  border:1px solid var(--line);border-radius:999px;
  padding:4px 12px;background:var(--bg-2);
}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;
  border-top:1px solid var(--line);margin-top:48px;padding-top:24px;
  font-size:13px;color:var(--text-3);
}
.foot-note{display:flex;gap:20px;flex-wrap:wrap}
.to-top{
  width:40px;height:40px;border-radius:50%;
  display:inline-flex;align-items:center;justify-content:center;
  background:transparent;border:1px solid var(--line);color:var(--text-2);
  font-size:16px;cursor:pointer;
  transition:border-color .2s ease-out,color .2s ease-out,transform .2s ease-out;
}
.to-top:hover{border-color:var(--primary);color:var(--text-1);transform:translateY(-2px)}

/* ---------- 响应式 ---------- */
@media (max-width:1439px){
  :root{--container:1200px}
}
@media (max-width:1023px){
  :root{--section:72px}
  .header-inner{height:64px;gap:16px}
  .header-search,.nav-links,.header-cta{display:none}
  .menu-toggle{display:flex}
  .mobile-search{display:none}
  .b-page-hero{padding:56px 0 44px}
  .b-page-hero h1{font-size:36px}
  .b-split{grid-template-columns:1fr;gap:32px}
  .split-figure{order:-1}
  .grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px}
  .issue-panel{padding:8px 24px}
  .c-issue{grid-template-columns:1fr;gap:10px}
  .c-issue-link{text-align:left}
  .entry-card{padding:32px 24px}
  .section-head h2,.split-text h2,.b-cta h2{font-size:26px}
}
@media (max-width:767px){
  :root{--section:56px;--gap:16px}
  .container{padding:0 18px}
  .b-page-hero h1{font-size:30px}
  .b-page-hero .lead{font-size:15px}
  .c-step{grid-template-columns:56px minmax(0,1fr);gap:18px;padding-bottom:34px}
  .c-step::before{left:27px;top:50px}
  .c-step-num{font-size:30px}
  .c-step-body h3{font-size:19px}
  .b-cta{padding:56px 0}
  .cta-actions{flex-direction:column}
  .cta-actions .c-btn{width:100%}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .to-top{align-self:flex-end}
}
@media (max-width:519px){
  .grid-4{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .c-faq-q{font-size:15px;padding:18px}
  .c-faq-a{padding:0 18px 18px}
  .hero-meta{font-size:11px;gap:8px 16px}
}

/* roulang page: category2 */
:root{
  --bg-0:#0A0818;
  --bg-1:#120E26;
  --bg-2:#1A1533;
  --bg-3:#241D45;
  --line:rgba(160,140,255,0.16);
  --text-1:#F4F1FF;
  --text-2:#B9AEE0;
  --text-3:#7E74A8;
  --primary:#7C5CFF;
  --primary-light:#8F73FF;
  --primary-deep:#5B3FE0;
  --accent:#FFB55C;
  --teal:#4FD1C5;
  --danger:#FF6B6B;
  --radius:16px;
  --radius-sm:12px;
  --shadow:0 10px 28px rgba(10,7,26,0.5);
  --shadow-hover:0 0 0 1px rgba(124,92,255,0.5),0 16px 40px rgba(94,63,224,0.28);
  --font:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --space:96px;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--text-1);
  font-family:var(--font);
  font-size:17px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:var(--teal);text-decoration:none;transition:color .2s ease-out;}
a:hover{color:var(--text-1);}
p{margin:0 0 1.4em;}
h1,h2,h3,h4{margin:0;font-family:var(--font);color:var(--text-1);letter-spacing:.01em;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:var(--font);cursor:pointer;}
input{font-family:var(--font);}
:focus-visible{outline:2px solid var(--teal);outline-offset:2px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.narrow{max-width:820px;margin:0 auto;}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:120;
  background:var(--bg-1);
  border-bottom:1px solid var(--line);
}
.header-inner{
  max-width:1280px;margin:0 auto;padding:0 24px;
  height:80px;display:flex;align-items:center;gap:24px;
}
.logo{display:flex;flex-direction:column;justify-content:center;line-height:1.1;flex:0 0 auto;min-width:186px;}
.logo-main{font-size:21px;font-weight:700;color:var(--text-1);letter-spacing:.04em;}
.logo-sub{font-size:11px;letter-spacing:.12em;color:var(--text-2);margin-top:4px;}
.search-wrap{
  position:relative;flex:1 1 auto;max-width:560px;height:48px;
}
.search-input{
  width:100%;height:48px;border-radius:999px;
  background:#0F0B22;border:1px solid var(--line);
  color:var(--text-1);font-size:15px;padding:0 112px 0 46px;
  transition:border-color .2s ease-out,box-shadow .2s ease-out;
  margin:0;
}
.search-input::placeholder{color:var(--text-3);}
.search-input:focus{
  outline:none;border-color:var(--primary);
  box-shadow:0 0 0 4px rgba(124,92,255,0.18);
}
.search-icon{
  position:absolute;left:18px;top:50%;transform:translateY(-50%);
  font-size:15px;color:var(--text-3);pointer-events:none;
}
.search-btn{
  position:absolute;right:4px;top:4px;height:40px;padding:0 20px;
  border:none;border-radius:999px;background:var(--primary);color:#fff;
  font-size:14px;font-weight:600;letter-spacing:.04em;
  transition:background-color .2s ease-out,transform .2s ease-out;
  margin:0;
}
.search-btn:hover{background:var(--primary-light);}
.search-btn:active{background:var(--primary-deep);transform:translateY(1px);}
.nav-links{display:flex;align-items:center;gap:26px;flex:0 1 auto;}
.nav-links a{
  position:relative;font-size:14px;color:var(--text-2);
  padding:6px 0;white-space:nowrap;transition:color .2s ease-out;
}
.nav-links a:hover{color:var(--text-1);}
.nav-links a.active{color:var(--text-1);font-weight:600;}
.nav-links a.active::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;
  background:var(--primary);border-radius:0;
}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:999px;padding:14px 28px;font-size:15px;font-weight:600;
  letter-spacing:.02em;border:1px solid transparent;
  transition:transform .2s ease-out,background-color .2s ease-out,border-color .2s ease-out,box-shadow .2s ease-out;
  text-align:center;
}
.btn-primary{background:var(--primary);color:#fff;}
.btn-primary:hover{background:var(--primary-light);color:#fff;transform:translateY(-2px);box-shadow:var(--shadow-hover);}
.btn-primary:active{background:var(--primary-deep);transform:translateY(1px);}
.btn-ghost{background:transparent;color:var(--text-1);border-color:rgba(255,255,255,0.22);}
.btn-ghost:hover{border-color:var(--primary);background:rgba(124,92,255,0.12);color:var(--text-1);transform:translateY(-2px);}
.btn-ghost:active{transform:translateY(1px);}
.header-cta{flex:0 0 auto;padding:11px 22px;font-size:14px;}
.menu-toggle{
  display:none;width:44px;height:44px;flex:0 0 44px;
  border-radius:12px;border:1px solid var(--line);background:var(--bg-2);
  color:var(--text-1);font-size:17px;align-items:center;justify-content:center;
}
.menu-toggle:hover{border-color:var(--primary);}

/* 移动抽屉 */
.drawer-mask{
  position:fixed;inset:0;background:rgba(6,4,16,0.72);
  opacity:0;visibility:hidden;transition:opacity .24s ease-out,visibility .24s ease-out;z-index:130;
}
.drawer-mask.open{opacity:1;visibility:visible;}
.mobile-drawer{
  position:fixed;top:0;right:0;bottom:0;width:86%;max-width:360px;
  background:var(--bg-1);border-left:1px solid var(--line);
  transform:translateX(102%);transition:transform .26s ease-out;z-index:140;
  padding:22px 22px 32px;display:flex;flex-direction:column;gap:18px;overflow-y:auto;
}
.mobile-drawer.open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;}
.drawer-close{
  width:44px;height:44px;border-radius:12px;border:1px solid var(--line);
  background:var(--bg-2);color:var(--text-1);font-size:16px;
}
.drawer-search{position:relative;height:48px;}
.drawer-search input{
  width:100%;height:48px;border-radius:12px;background:var(--bg-2);
  border:1px solid var(--line);color:var(--text-1);padding:0 14px 0 42px;font-size:15px;margin:0;
}
.drawer-search input::placeholder{color:var(--text-3);}
.drawer-search input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 4px rgba(124,92,255,0.18);}
.drawer-search i{position:absolute;left:15px;top:50%;transform:translateY(-50%);color:var(--text-3);font-size:14px;}
.drawer-nav{display:flex;flex-direction:column;}
.drawer-nav a{
  display:flex;align-items:center;min-height:48px;font-size:15px;color:var(--text-2);
  border-bottom:1px solid var(--line);
}
.drawer-nav a.active{color:var(--primary-light);font-weight:600;}
.drawer-nav a:hover{color:var(--text-1);}

/* ---------- 页面头部 ---------- */
.page-hero{
  position:relative;padding:64px 0 56px;
  background-color:var(--bg-1);
  background-image:
    linear-gradient(90deg,rgba(10,8,24,0.96) 0%,rgba(10,8,24,0.82) 55%,rgba(10,8,24,0.55) 100%),
    linear-gradient(180deg,rgba(10,8,24,0.55) 0%,rgba(10,8,24,0.9) 100%),
    url(/assets/images/backpic/back-2.webp);
  background-size:cover;background-position:center;
  border-bottom:1px solid var(--line);
}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-3);margin-bottom:22px;}
.crumb a{color:var(--text-3);}
.crumb a:hover{color:var(--teal);}
.crumb span.sep{color:var(--text-3);opacity:.7;}
.crumb .current{color:var(--text-2);}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;
  border:1px solid rgba(255,181,92,0.55);color:var(--accent);
  font-size:12px;letter-spacing:.06em;margin-bottom:22px;background:transparent;
}
.page-hero h1{
  font-size:46px;font-weight:700;line-height:1.25;letter-spacing:.01em;
  max-width:760px;
}
.page-hero .hero-sub{
  margin-top:20px;max-width:660px;font-size:16px;color:var(--text-2);line-height:1.8;
}
.hero-meta{display:flex;flex-wrap:wrap;gap:20px;margin-top:26px;font-size:13px;color:var(--text-3);}
.hero-meta span{display:inline-flex;align-items:center;gap:7px;}

/* ---------- 指标条 ---------- */
.stat-strip{padding:var(--space) 0 0;}
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.stat-card{
  background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 24px;box-shadow:var(--shadow);
  transition:border-color .2s ease-out,box-shadow .2s ease-out,transform .2s ease-out;
}
.stat-card:hover{border-color:rgba(124,92,255,0.5);box-shadow:var(--shadow-hover);transform:translateY(-3px);}
.stat-num{font-size:32px;font-weight:800;color:var(--text-1);font-variant-numeric:tabular-nums;line-height:1.2;}
.stat-num em{font-style:normal;color:var(--primary-light);font-size:18px;margin-left:4px;font-weight:600;}
.stat-label{margin-top:8px;font-size:13px;color:var(--text-2);letter-spacing:.04em;}
.stat-line{height:1px;background:var(--line);margin:16px 0 12px;}
.stat-note{font-size:13px;color:var(--text-3);line-height:1.7;}

/* ---------- 通用区块 ---------- */
.section{padding:var(--space) 0 0;}
.section-head{margin-bottom:40px;}
.section-head h2{
  font-size:32px;font-weight:700;line-height:1.35;position:relative;padding-left:18px;
}
.section-head h2::before{
  content:"";position:absolute;left:0;top:8px;bottom:8px;width:4px;
  background:var(--primary);border-radius:2px;
}
.section-head p{margin:16px 0 0;color:var(--text-2);font-size:15px;max-width:720px;}

/* ---------- 功能交错块 ---------- */
.feature-row{
  display:grid;grid-template-columns:5fr 7fr;gap:48px;align-items:center;
  margin-bottom:64px;
}
.feature-row:last-child{margin-bottom:0;}
.feature-row.reverse{grid-template-columns:7fr 5fr;}
.feature-row.reverse .feature-media{order:2;}
.feature-media{
  position:relative;border-radius:var(--radius);overflow:hidden;
  border:1px solid var(--line);background:var(--bg-3);
  aspect-ratio:16/10;box-shadow:var(--shadow);
}
.feature-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease-out;}
.feature-media:hover img{transform:scale(1.03);}
.feature-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(10,8,24,0) 45%,rgba(10,8,24,0.55) 100%);
  pointer-events:none;
}
.feature-index{
  position:absolute;left:16px;top:14px;z-index:2;
  font-size:13px;letter-spacing:.12em;color:var(--accent);
  border:1px solid rgba(255,181,92,0.5);border-radius:999px;
  padding:3px 12px;background:rgba(10,8,24,0.6);font-variant-numeric:tabular-nums;
}
.feature-body .f-icon{
  display:inline-flex;align-items:center;justify-content:center;
  width:42px;height:42px;border-radius:12px;
  background:rgba(124,92,255,0.14);border:1px solid rgba(124,92,255,0.36);
  color:var(--primary-light);font-size:17px;margin-bottom:16px;
}
.feature-body h3{font-size:22px;font-weight:600;line-height:1.45;margin-bottom:12px;}
.feature-body p{color:var(--text-2);font-size:15px;line-height:1.85;margin-bottom:14px;}
.inline-link{
  display:inline-flex;align-items:center;gap:7px;font-size:14px;color:var(--teal);
  border-bottom:1px solid transparent;transition:border-color .2s ease-out,color .2s ease-out;
}
.inline-link:hover{border-color:var(--teal);color:var(--text-1);}
.inline-link i{font-size:12px;transition:transform .2s ease-out;}
.inline-link:hover i{transform:translateX(3px);}

/* ---------- 路径流程 ---------- */
.path-section{padding:var(--space) 0 0;}
.path-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.path-card{
  position:relative;background:var(--bg-2);border:1px solid var(--line);
  border-radius:var(--radius);padding:30px 26px;box-shadow:var(--shadow);
  transition:border-color .2s ease-out,transform .2s ease-out,box-shadow .2s ease-out;
}
.path-card:hover{border-color:rgba(124,92,255,0.5);transform:translateY(-3px);box-shadow:var(--shadow-hover);}
.path-num{
  display:inline-block;font-size:40px;font-weight:800;line-height:1;
  color:transparent;-webkit-text-stroke:1.4px var(--primary);
  margin-bottom:18px;font-variant-numeric:tabular-nums;
}
.path-card h3{font-size:18px;font-weight:600;margin-bottom:10px;}
.path-card p{font-size:14px;color:var(--text-2);line-height:1.8;margin:0;}
.path-tag{
  display:inline-block;margin-top:16px;font-size:12px;letter-spacing:.06em;
  color:var(--teal);border:1px solid rgba(79,209,197,0.4);border-radius:999px;padding:3px 12px;
}

/* ---------- FAQ ---------- */
.faq-section{padding:var(--space) 0 0;}
.faq-list{display:flex;flex-direction:column;gap:12px;}
.faq-item{
  background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius);
  padding:0 24px;transition:border-color .2s ease-out;
}
.faq-item:hover{border-color:rgba(124,92,255,0.5);}
.faq-q{
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  width:100%;background:none;border:none;color:var(--text-1);
  font-size:16px;font-weight:600;text-align:left;padding:20px 0;line-height:1.6;
  min-height:44px;
}
.faq-q .plus{
  flex:0 0 22px;width:22px;height:22px;position:relative;
  transition:transform .2s ease-out;
}
.faq-q .plus::before,.faq-q .plus::after{
  content:"";position:absolute;background:var(--primary-light);border-radius:2px;
}
.faq-q .plus::before{left:0;right:0;top:10px;height:2px;}
.faq-q .plus::after{top:0;bottom:0;left:10px;width:2px;transition:opacity .2s ease-out;}
.faq-item.open .faq-q .plus{transform:rotate(180deg);}
.faq-item.open .faq-q .plus::after{opacity:0;}
.faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease-out;}
.faq-a p{
  margin:0;padding:16px 0 22px;border-top:1px solid var(--line);
  color:var(--text-2);font-size:15px;line-height:1.85;
}

/* ---------- CTA ---------- */
.cta-section{padding:var(--space) 0 0;}
.cta-box{
  position:relative;background:var(--bg-1);border:1px solid var(--line);
  border-radius:20px;padding:64px 32px;text-align:center;overflow:hidden;
}
.cta-box::before{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(circle at 18% 22%,rgba(124,92,255,0.22),transparent 42%),
                   radial-gradient(circle at 82% 78%,rgba(79,209,197,0.12),transparent 46%);
  pointer-events:none;
}
.cta-box h2{position:relative;font-size:32px;line-height:1.35;}
.cta-box p{position:relative;margin:16px auto 30px;max-width:620px;color:var(--text-2);font-size:15px;}
.cta-actions{position:relative;display:flex;gap:16px;justify-content:center;flex-wrap:wrap;}

/* ---------- 页脚 ---------- */
.site-footer{margin-top:var(--space);background:var(--bg-1);border-top:1px solid var(--line);padding:64px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px;}
.footer-brand .logo{min-width:0;margin-bottom:16px;}
.footer-desc{font-size:14px;color:var(--text-2);line-height:1.8;margin:0 0 16px;max-width:280px;}
.footer-status{display:flex;align-items:center;gap:8px;font-size:12px;color:var(--text-3);}
.dot{width:7px;height:7px;border-radius:50%;background:var(--teal);display:inline-block;box-shadow:0 0 0 3px rgba(79,209,197,0.16);}
.footer-col h4{font-size:14px;font-weight:600;color:var(--text-1);margin-bottom:16px;letter-spacing:.04em;}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col a{font-size:14px;color:var(--text-2);}
.footer-col a:hover{color:var(--text-1);text-decoration:underline;text-underline-offset:3px;}
.footer-badge-box{display:flex;gap:8px;margin-top:18px;flex-wrap:wrap;}
.footer-badge-box span{
  font-size:12px;letter-spacing:.06em;color:var(--accent);
  border:1px solid rgba(255,181,92,0.5);border-radius:999px;padding:3px 12px;
}
.footer-bottom{
  margin-top:48px;border-top:1px solid var(--line);
  padding:22px 0 26px;display:flex;align-items:center;justify-content:space-between;
  gap:18px;flex-wrap:wrap;font-size:13px;color:var(--text-3);
}
.foot-note{display:flex;gap:20px;flex-wrap:wrap;}
.to-top{
  width:40px;height:40px;border-radius:50%;border:1px solid var(--line);
  background:transparent;color:var(--text-2);font-size:15px;
  transition:border-color .2s ease-out,color .2s ease-out,transform .2s ease-out;
}
.to-top:hover{border-color:var(--primary);color:var(--text-1);transform:translateY(-2px);}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .container{max-width:1120px;}
}
@media (max-width:1023px){
  :root{--space:72px;}
  .header-inner{height:72px;gap:16px;}
  .nav-links,.header-cta{display:none;}
  .menu-toggle{display:inline-flex;}
  .logo{min-width:0;}
  .search-wrap{max-width:none;}
  .page-hero h1{font-size:36px;}
  .stat-grid{grid-template-columns:repeat(2,1fr);}
  .feature-row,.feature-row.reverse{grid-template-columns:1fr;gap:28px;}
  .feature-row.reverse .feature-media{order:0;}
  .path-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .cta-box h2,.section-head h2{font-size:26px;}
}
@media (max-width:767px){
  body{font-size:16px;}
  :root{--space:56px;}
  .header-inner{height:64px;padding:0 16px;gap:12px;}
  .logo-main{font-size:19px;}
  .logo-sub{font-size:10px;}
  .search-wrap{display:none;}
  .container{padding:0 16px;}
  .page-hero{padding:44px 0 40px;}
  .page-hero h1{font-size:30px;}
  .page-hero .hero-sub{font-size:15px;}
  .stat-grid{grid-template-columns:1fr;}
  .stat-card{padding:22px 20px;}
  .feature-body h3{font-size:19px;}
  .faq-item{padding:0 18px;}
  .faq-q{font-size:15px;}
  .cta-box{padding:44px 20px;border-radius:16px;}
  .cta-actions .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:14px;}
  .foot-note{flex-direction:column;gap:6px;}
}
@media (max-width:520px){
  .stat-num{font-size:26px;}
  .path-num{font-size:34px;}
  .drawer-mask,.mobile-drawer{display:block;}
}

/* roulang page: category3 */
/* ============ 设计变量 ============ */
:root{
  --bg-0:#0A0818;
  --bg-1:#120E26;
  --bg-2:#1A1533;
  --bg-3:#241D45;
  --line:rgba(160,140,255,.16);
  --text-1:#F4F1FF;
  --text-2:#B9AEE0;
  --text-3:#7E74A8;
  --primary:#7C5CFF;
  --primary-soft:#8F73FF;
  --primary-deep:#5B3FE0;
  --accent:#FFB55C;
  --teal:#4FD1C5;
  --radius-lg:16px;
  --radius-md:12px;
  --radius-pill:999px;
  --shadow:0 10px 28px rgba(10,7,26,.5);
  --shadow-hover:0 0 0 1px rgba(124,92,255,.5),0 16px 40px rgba(94,63,224,.28);
  --container:1200px;
  --ease:200ms ease-out;
}
/* ============ 基础 reset ============ */
*,*::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:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:17px;
  line-height:1.85;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
a{color:var(--teal);text-decoration:none;transition:color var(--ease),text-decoration-color var(--ease)}
a:hover{color:#7FE3DA;text-decoration:underline;text-underline-offset:3px}
img{max-width:100%;display:block;height:auto}
button{font-family:inherit}
input,button,select{font-size:16px}
:focus-visible{outline:2px solid var(--teal);outline-offset:2px;border-radius:4px}
::selection{background:rgba(124,92,255,.45);color:#fff}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section--tight{padding:72px 0}
.section--alt{background:var(--bg-1)}
.sec-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:32px}
.sec-title{font-size:32px;line-height:1.35;font-weight:700;position:relative;padding-left:16px}
.sec-title::before{content:"";position:absolute;left:0;top:.22em;bottom:.22em;width:4px;border-radius:2px;background:var(--primary)}
.sec-sub{color:var(--text-2);font-size:15px;line-height:1.8;max-width:640px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12px;letter-spacing:.06em;color:var(--accent);border:1px solid rgba(255,181,92,.45);border-radius:var(--radius-pill);padding:5px 14px;background:transparent}
.muted{color:var(--text-3);font-size:14px}
.tnum{font-variant-numeric:tabular-nums}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--bg-1);
  border-bottom:1px solid var(--line);
  box-shadow:0 6px 20px rgba(6,4,18,.55);
}
.header-inner{display:flex;align-items:center;gap:24px;height:80px}
.logo{display:flex;flex-direction:column;justify-content:center;line-height:1.15;flex:0 0 auto;text-decoration:none}
.logo:hover{text-decoration:none}
.logo-main{font-size:21px;font-weight:700;color:var(--text-1);letter-spacing:.06em}
.logo-sub{font-size:11px;letter-spacing:.12em;color:var(--text-3);margin-top:3px}
.nav-search{flex:1 1 auto;max-width:560px;min-width:0}
.search-form{
  display:flex;align-items:center;height:48px;border-radius:var(--radius-pill);
  background:#0F0B22;border:1px solid var(--line);padding:0 4px 0 16px;
  transition:border-color var(--ease),box-shadow var(--ease);
}
.search-form:focus-within{border-color:var(--primary);box-shadow:0 0 0 4px rgba(124,92,255,.18)}
.search-form svg{flex:0 0 auto;color:var(--text-3)}
.search-form input{
  flex:1 1 auto;min-width:0;height:44px;border:0;background:transparent;color:var(--text-1);
  padding:0 12px;font-size:15px;
}
.search-form input::placeholder{color:var(--text-3)}
.search-form input:focus{outline:none}
.search-form button{
  flex:0 0 auto;height:40px;padding:0 20px;border:0;border-radius:var(--radius-pill);
  background:var(--primary);color:#fff;font-size:14px;font-weight:600;cursor:pointer;
  transition:background var(--ease),transform var(--ease);
}
.search-form button:hover{background:var(--primary-soft)}
.search-form button:active{background:var(--primary-deep);transform:translateY(1px)}
.nav-links{display:flex;align-items:center;gap:26px;margin-left:auto}
.nav-links a{
  position:relative;font-size:14px;color:var(--text-2);text-decoration:none;padding:6px 0;
  transition:color var(--ease);
}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;border-radius:0;
  background:var(--primary);transform:scaleX(0);transform-origin:left;transition:transform var(--ease);
}
.nav-links a:hover{color:var(--text-1)}
.nav-links a:hover::after,.nav-links a.active::after{transform:scaleX(1)}
.nav-links a.active{color:var(--text-1)}
.header-cta{flex:0 0 auto}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 26px;border-radius:var(--radius-pill);border:1px solid transparent;
  font-size:15px;font-weight:600;cursor:pointer;text-decoration:none;
  transition:background var(--ease),border-color var(--ease),color var(--ease),transform var(--ease),box-shadow var(--ease);
}
.btn:hover{text-decoration:none;transform:translateY(-2px)}
.btn:active{transform:translateY(1px)}
.btn--primary{background:var(--primary);color:#fff;box-shadow:0 8px 20px rgba(94,63,224,.35)}
.btn--primary:hover{background:var(--primary-soft);color:#fff}
.btn--primary:active{background:var(--primary-deep)}
.btn--ghost{background:transparent;border-color:rgba(255,255,255,.22);color:var(--text-1)}
.btn--ghost:hover{border-color:var(--primary);background:rgba(124,92,255,.12);color:var(--text-1)}
.btn--wide{width:100%;height:52px;font-size:16px}
.menu-toggle{
  display:none;align-items:center;justify-content:center;width:44px;height:44px;
  border-radius:var(--radius-md);background:var(--bg-2);border:1px solid var(--line);color:var(--text-1);cursor:pointer;
}
.search-toggle{display:none;align-items:center;justify-content:center;width:44px;height:44px;
  border-radius:var(--radius-md);background:var(--bg-2);border:1px solid var(--line);color:var(--text-1);cursor:pointer;}

/* 移动抽屉 */
.mobile-drawer{
  position:fixed;inset:0;z-index:90;background:var(--bg-1);
  display:none;flex-direction:column;padding:24px;overflow-y:auto;
}
.mobile-drawer.open{display:flex}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px}
.drawer-close{width:44px;height:44px;border-radius:var(--radius-md);background:var(--bg-2);border:1px solid var(--line);color:var(--text-1);cursor:pointer;font-size:20px}
.drawer-nav a{
  display:flex;align-items:center;min-height:48px;font-size:16px;color:var(--text-1);
  border-bottom:1px solid var(--line);text-decoration:none;
}
.drawer-nav a.active{color:var(--accent)}
.drawer-foot{margin-top:auto;padding-top:24px}

/* ============ 页面头部 ============ */
.page-hero{
  position:relative;overflow:hidden;
  min-height:340px;display:flex;align-items:flex-end;
  padding:64px 0 56px;
  background-color:var(--bg-2);
  background-image:
    linear-gradient(180deg,rgba(10,8,24,.9) 0%,rgba(10,8,24,.55) 45%,rgba(10,8,24,.96) 100%),
    linear-gradient(90deg,rgba(10,8,24,.94) 0%,rgba(10,8,24,.45) 62%,rgba(10,8,24,.8) 100%),
    url('/assets/images/backpic/back-2.webp');
  background-size:cover;
  background-position:center 35%;
}
.page-hero .container{position:relative;z-index:2;max-width:var(--container)}
.crumb{font-size:13px;color:var(--text-3);margin-bottom:20px;letter-spacing:.02em}
.crumb a{color:var(--text-3)}
.crumb a:hover{color:var(--text-1);text-decoration:none}
.crumb span{margin:0 8px;color:rgba(126,116,168,.7)}
.page-hero h1{
  font-size:46px;line-height:1.25;font-weight:700;letter-spacing:.01em;
  max-width:760px;margin:18px 0 16px;
}
.page-hero .lede{font-size:17px;line-height:1.8;color:var(--text-2);max-width:640px}
.hero-meta{display:flex;flex-wrap:wrap;gap:20px;margin-top:24px;font-size:13px;color:var(--text-3)}
.hero-meta i{display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--teal);margin-right:7px;vertical-align:middle}

/* ============ 设备卡片 ============ */
.device-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.device-card{
  background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:28px 26px;box-shadow:var(--shadow);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease),background var(--ease);
}
.device-card:hover{transform:translateY(-4px);border-color:rgba(124,92,255,.55);box-shadow:var(--shadow-hover);background:var(--bg-3)}
.device-card .ico{
  width:46px;height:46px;border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;
  border:1px solid var(--line);background:rgba(124,92,255,.12);color:var(--primary);margin-bottom:18px;
}
.device-card h3{font-size:20px;font-weight:600;line-height:1.4;margin-bottom:10px}
.device-card p{font-size:15px;line-height:1.8;color:var(--text-2)}
.device-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.tag{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:var(--radius-pill);
  font-size:12px;letter-spacing:.04em;color:var(--text-2);border:1px solid var(--line);background:rgba(255,255,255,.02);
}
.tag--accent{color:var(--accent);border-color:rgba(255,181,92,.4)}

/* ============ 对比表 ============ */
.table-tip{font-size:13px;color:var(--text-3);margin-bottom:14px}
.table-wrap{
  overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius-lg);
  background:var(--bg-2);box-shadow:var(--shadow);
  -webkit-overflow-scrolling:touch;
}
table.cmp{width:100%;min-width:820px;border-collapse:collapse;font-size:15px}
table.cmp thead th{
  background:var(--bg-3);color:var(--text-1);font-weight:600;text-align:left;
  padding:16px 20px;white-space:nowrap;font-size:14px;letter-spacing:.03em;
}
table.cmp tbody td{
  padding:16px 20px;border-top:1px solid var(--line);color:var(--text-2);line-height:1.7;vertical-align:top;
}
table.cmp tbody td:first-child{color:var(--text-1);font-weight:600;white-space:nowrap}
table.cmp tbody tr{transition:background var(--ease)}
table.cmp tbody tr:hover{background:rgba(124,92,255,.07)}
.state-ok{color:var(--teal)}

/* ============ 数据指标 ============ */
.metrics{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
.metric{
  border:1px solid var(--line);border-radius:var(--radius-lg);padding:24px 22px;
  background:linear-gradient(180deg,rgba(36,29,69,.65),rgba(26,21,51,.9));
}
.metric strong{display:block;font-size:34px;font-weight:800;line-height:1.2;color:var(--text-1);font-variant-numeric:tabular-nums}
.metric span{display:block;margin-top:8px;font-size:13px;color:var(--text-3);letter-spacing:.04em}
.metric em{font-style:normal;color:var(--accent);font-size:18px;margin-left:2px}

/* ============ 图文自检 ============ */
.split{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:56px;align-items:center}
.split figure{margin:0}
.split img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--radius-lg);border:1px solid var(--line);background:var(--bg-3)}
.check-list{margin-top:22px;display:grid;gap:14px}
.check-list li{
  display:flex;gap:14px;align-items:flex-start;font-size:15px;line-height:1.8;color:var(--text-2);
}
.check-list b{color:var(--text-1);font-weight:600}
.check-index{
  flex:0 0 auto;width:28px;height:28px;border-radius:50%;border:1px solid rgba(124,92,255,.55);
  color:var(--primary);font-size:13px;font-weight:700;display:flex;align-items:center;justify-content:center;
  font-variant-numeric:tabular-nums;margin-top:2px;
}

/* ============ 步骤流 ============ */
.steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;counter-reset:step}
.step{
  position:relative;background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:30px 26px 28px;box-shadow:var(--shadow);transition:border-color var(--ease),transform var(--ease);
}
.step:hover{border-color:rgba(124,92,255,.5);transform:translateY(-3px)}
.step .num{
  font-size:34px;font-weight:800;line-height:1;color:transparent;
  -webkit-text-stroke:1.5px rgba(124,92,255,.85);letter-spacing:.02em;
}
.step h3{font-size:19px;font-weight:600;margin:14px 0 10px}
.step p{font-size:15px;line-height:1.8;color:var(--text-2)}

/* ============ FAQ ============ */
.faq-wrap{max-width:820px;margin:0 auto}
.faq-item{
  background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius-lg);
  margin-bottom:12px;overflow:hidden;transition:border-color var(--ease),background var(--ease);
}
.faq-item:hover{border-color:rgba(124,92,255,.55)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 24px;font-size:16px;font-weight:600;color:var(--text-1);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"+";flex:0 0 auto;width:22px;text-align:center;font-size:20px;font-weight:400;
  color:var(--primary);transition:transform var(--ease),color var(--ease);
}
.faq-item[open] summary::after{content:"−";color:var(--accent);transform:rotate(180deg)}
.faq-item .faq-body{
  padding:16px 24px 22px;border-top:1px solid var(--line);
  font-size:15px;line-height:1.85;color:var(--text-2);
}
.faq-item .faq-body a{color:var(--teal)}

/* ============ CTA ============ */
.cta-band{
  background:var(--bg-1);
  background-image:radial-gradient(circle at 20% 30%,rgba(124,92,255,.16),transparent 55%),
                   radial-gradient(circle at 82% 70%,rgba(79,209,197,.08),transparent 50%);
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  padding:88px 0;text-align:center;
}
.cta-band h2{font-size:32px;font-weight:700;line-height:1.35;margin-bottom:14px}
.cta-band p{color:var(--text-2);font-size:16px;max-width:640px;margin:0 auto 30px}
.cta-actions{display:flex;flex-wrap:wrap;gap:16px;justify-content:center}
.mini-cta{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:18px;
  border:1px solid var(--line);border-radius:var(--radius-lg);background:var(--bg-2);
  padding:22px 28px;max-width:820px;margin:44px auto 0;
}
.mini-cta p{font-size:15px;color:var(--text-2);margin:0}
.mini-cta b{color:var(--text-1)}

/* ============ 页脚 ============ */
.site-footer{background:var(--bg-1);border-top:1px solid var(--line);padding:72px 0 28px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px}
.footer-brand .logo{margin-bottom:16px}
.footer-desc{font-size:14px;line-height:1.8;color:var(--text-2);max-width:280px}
.footer-status{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-3);margin-top:16px}
.footer-status .dot{width:7px;height:7px;border-radius:50%;background:var(--teal);box-shadow:0 0 0 3px rgba(79,209,197,.16)}
.footer-col h4{font-size:14px;font-weight:600;color:var(--text-1);letter-spacing:.06em;margin-bottom:16px}
.footer-col li{margin-bottom:10px}
.footer-col a{font-size:14px;color:var(--text-2)}
.footer-col a:hover{color:var(--text-1);text-decoration:underline;text-underline-offset:3px}
.footer-badge-box{display:flex;gap:8px;margin-top:16px;flex-wrap:wrap}
.footer-badge-box span{
  font-size:12px;color:var(--text-2);border:1px solid var(--line);border-radius:var(--radius-pill);padding:4px 12px;
}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;
  border-top:1px solid var(--line);margin-top:48px;padding-top:22px;font-size:13px;color:var(--text-3);
}
.foot-note{display:flex;flex-wrap:wrap;gap:20px}
.to-top{
  width:40px;height:40px;border-radius:50%;border:1px solid var(--line);background:transparent;
  color:var(--text-2);font-size:16px;cursor:pointer;line-height:1;
  transition:border-color var(--ease),color var(--ease),transform var(--ease);
}
.to-top:hover{border-color:var(--primary);color:var(--text-1);transform:translateY(-2px)}

/* ============ 响应式 ============ */
@media (max-width:1023px){
  .header-inner{height:64px;gap:16px}
  .nav-search{display:none}
  .nav-links,.header-cta{display:none}
  .search-toggle,.menu-toggle{display:flex}
  .site-header.search-open .nav-search{
    display:block;position:absolute;left:0;right:0;top:64px;padding:12px 24px;
    background:var(--bg-1);border-bottom:1px solid var(--line);max-width:none;
  }
  .page-hero{padding:48px 0 44px;min-height:300px}
  .page-hero h1{font-size:36px}
  .section{padding:72px 0}
  .section--tight{padding:56px 0}
  .device-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .metrics{grid-template-columns:repeat(2,minmax(0,1fr))}
  .split{grid-template-columns:1fr;gap:32px}
  .steps{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px}
  .sec-title{font-size:26px}
  .cta-band h2{font-size:26px}
}
@media (max-width:639px){
  body{font-size:16px}
  .container{padding:0 18px}
  .page-hero{min-height:260px}
  .page-hero h1{font-size:30px;margin:14px 0 12px}
  .page-hero .lede{font-size:15px}
  .section{padding:56px 0}
  .section--tight{padding:44px 0}
  .device-grid{grid-template-columns:1fr}
  .metrics{grid-template-columns:1fr 1fr;gap:14px}
  .metric strong{font-size:26px}
  .sec-title{font-size:24px;padding-left:14px}
  .cta-band{padding:56px 0}
  .cta-actions .btn{width:100%}
  .mini-cta{flex-direction:column;align-items:flex-start;padding:20px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .faq-item summary{padding:18px;font-size:15px}
  .faq-item .faq-body{padding:14px 18px 20px}
}
@media (min-width:1440px){
  :root{--container:1280px}
}

/* roulang page: category4 */
:root{
  --bg-0:#0A0818;
  --bg-1:#120E26;
  --bg-2:#1A1533;
  --bg-3:#241D45;
  --line:rgba(160,140,255,.16);
  --text-1:#F4F1FF;
  --text-2:#B9AEE0;
  --text-3:#7E74A8;
  --primary:#7C5CFF;
  --primary-deep:#5B3FE0;
  --primary-lift:#8F73FF;
  --accent:#FFB55C;
  --teal:#4FD1C5;
  --danger:#FF6B6B;
  --r-card:16px;
  --r-pill:999px;
  --shadow:0 10px 28px rgba(10,7,26,.5);
  --shadow-hover:0 0 0 1px rgba(124,92,255,.5),0 16px 40px rgba(94,63,224,.28);
  --container:1200px;
  --gap:96px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--text-1);
  font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  font-size:17px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
img{max-width:100%;display:block}
a{color:var(--teal);text-decoration:none;transition:color .2s ease-out}
a:hover{color:var(--primary-lift)}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--teal);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
@media (min-width:1440px){:root{--container:1280px}}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--bg-1);
  border-bottom:1px solid var(--line);
}
.header-inner{
  display:flex;align-items:center;gap:24px;
  height:80px;
}
.logo{
  display:flex;flex-direction:column-reverse;justify-content:center;
  line-height:1.15;flex:0 0 auto;min-width:132px;
  color:var(--text-1);
}
.logo-main{font-size:21px;font-weight:700;letter-spacing:.06em;color:var(--text-1)}
.logo-sub{font-size:11px;letter-spacing:.12em;color:var(--text-3);margin-bottom:2px}
.logo:hover .logo-main{color:var(--primary-lift)}
.nav-search{flex:1 1 auto;max-width:560px}
.search-form{
  position:relative;display:flex;align-items:center;
  height:48px;background:#0F0B22;
  border:1px solid var(--line);border-radius:var(--r-pill);
  padding:0 4px 0 44px;
  transition:border-color .2s ease-out,box-shadow .2s ease-out;
}
.search-form:focus-within{border-color:var(--primary);box-shadow:0 0 0 4px rgba(124,92,255,.18)}
.search-form .search-icon{
  position:absolute;left:16px;top:50%;transform:translateY(-50%);
  width:18px;height:18px;stroke:var(--text-3);fill:none;stroke-width:1.8;
}
.search-form input[type="search"]{
  flex:1 1 auto;height:40px;background:transparent;border:0;
  color:var(--text-1);font-size:15px;padding:0 8px;
}
.search-form input::placeholder{color:var(--text-3)}
.search-form input:focus{outline:none}
.search-form button{
  flex:0 0 auto;height:40px;padding:0 20px;
  border:0;border-radius:var(--r-pill);
  background:var(--primary);color:#fff;font-size:14px;font-weight:600;
  cursor:pointer;transition:background .2s ease-out,transform .2s ease-out;
}
.search-form button:hover{background:var(--primary-lift)}
.search-form button:active{background:var(--primary-deep);transform:translateY(1px)}
.nav-links{
  display:flex;align-items:center;gap:22px;flex:0 0 auto;
}
.nav-links a{
  position:relative;font-size:14px;color:var(--text-2);
  padding:6px 0;white-space:nowrap;
}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--primary);transform:scaleX(0);transform-origin:left;
  transition:transform .2s ease-out;
}
.nav-links a:hover{color:var(--text-1)}
.nav-links a:hover::after,.nav-links a.active::after{transform:scaleX(1)}
.nav-links a.active{color:var(--text-1)}
.nav-cta{flex:0 0 auto}
.c-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:12px 26px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;cursor:pointer;border:1px solid transparent;
  transition:background .2s ease-out,border-color .2s ease-out,transform .2s ease-out,color .2s ease-out,box-shadow .2s ease-out;
  white-space:nowrap;
}
.c-btn--primary{background:var(--primary);color:#fff;box-shadow:var(--shadow)}
.c-btn--primary:hover{background:var(--primary-lift);color:#fff;transform:translateY(-2px)}
.c-btn--primary:active{background:var(--primary-deep);transform:translateY(1px)}
.c-btn--ghost{background:transparent;color:var(--text-1);border-color:rgba(255,255,255,.22)}
.c-btn--ghost:hover{border-color:var(--primary);background:rgba(124,92,255,.12);color:var(--text-1)}
.c-btn--ghost:active{background:rgba(124,92,255,.2);transform:translateY(1px)}
.c-btn--sm{min-height:40px;padding:9px 20px;font-size:14px}
.hamburger{
  display:none;width:44px;height:44px;border-radius:12px;
  background:var(--bg-2);border:1px solid var(--line);
  align-items:center;justify-content:center;cursor:pointer;
}
.hamburger span{display:block;width:18px;height:2px;background:var(--text-1);position:relative}
.hamburger span::before,.hamburger span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--text-1);
}
.hamburger span::before{top:-6px}
.hamburger span::after{top:6px}

/* 移动抽屉 */
.mobile-drawer{
  position:fixed;inset:0;z-index:100;
  background:var(--bg-1);
  display:flex;flex-direction:column;
  padding:20px 24px 32px;
  transform:translateX(100%);
  transition:transform .24s ease-out;
  visibility:hidden;
}
.mobile-drawer.open{transform:translateX(0);visibility:visible}
.drawer-top{display:flex;align-items:center;justify-content:space-between;padding-bottom:18px;border-bottom:1px solid var(--line)}
.drawer-close{
  width:44px;height:44px;border-radius:12px;border:1px solid var(--line);
  background:var(--bg-2);color:var(--text-1);font-size:22px;line-height:1;cursor:pointer;
}
.drawer-nav{display:flex;flex-direction:column;margin-top:16px}
.drawer-nav a{
  display:flex;align-items:center;height:48px;font-size:16px;color:var(--text-2);
  border-bottom:1px solid var(--line);
}
.drawer-nav a.active{color:var(--primary-lift)}
.drawer-foot{margin-top:auto;padding-top:24px}
.drawer-foot .c-btn{width:100%}

/* ---------- 页面头部 ---------- */
.b-page-hero{
  position:relative;overflow:hidden;
  padding:56px 0 64px;
  border-bottom:1px solid var(--line);
}
.b-page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
  opacity:.42;
}
.b-page-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(10,8,24,.96) 0%,rgba(10,8,24,.86) 52%,rgba(10,8,24,.55) 100%),
             linear-gradient(180deg,rgba(10,8,24,.65) 0%,rgba(10,8,24,.2) 45%,var(--bg-0) 100%);
}
.b-page-hero .container{position:relative;z-index:2}
.breadcrumb{
  display:flex;align-items:center;gap:8px;
  font-size:14px;color:var(--text-3);margin-bottom:22px;
}
.breadcrumb a{color:var(--text-3)}
.breadcrumb a:hover{color:var(--teal)}
.breadcrumb .sep{color:rgba(160,140,255,.4)}
.c-badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 14px;border-radius:var(--r-pill);
  border:1px solid rgba(255,181,92,.55);
  background:transparent;color:var(--accent);
  font-size:12px;letter-spacing:.06em;
}
.b-page-hero h1{
  font-size:46px;font-weight:700;line-height:1.25;letter-spacing:.01em;
  margin:20px 0 18px;max-width:900px;
}
.page-hero-sub{
  font-size:17px;line-height:1.85;color:var(--text-2);
  max-width:720px;
}
.hero-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 26px;
  margin-top:28px;font-size:13px;color:var(--text-3);
  font-variant-numeric:tabular-nums;
}
.hero-meta .status{
  display:inline-flex;align-items:center;gap:8px;
}
.hero-meta .dot{
  width:7px;height:7px;border-radius:50%;background:var(--teal);
  box-shadow:0 0 0 4px rgba(79,209,197,.16);
}

/* ---------- 快速定位 ---------- */
.b-quick{padding:64px 0 8px}
.quick-head{
  display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;
  gap:12px;margin-bottom:28px;
}
.quick-head h2{font-size:28px;font-weight:700;line-height:1.35}
.quick-head p{font-size:14px;color:var(--text-2);max-width:520px}
.quick-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:20px;
}
.c-quick-card{
  position:relative;display:block;
  background:var(--bg-2);border:1px solid var(--line);
  border-radius:var(--r-card);padding:24px 24px 22px;
  box-shadow:var(--shadow);
  transition:transform .2s ease-out,border-color .2s ease-out,box-shadow .2s ease-out;
}
.c-quick-card:hover{transform:translateY(-4px);border-color:var(--primary);box-shadow:var(--shadow-hover)}
.c-quick-card .num{
  display:block;font-size:30px;font-weight:800;line-height:1;
  color:transparent;-webkit-text-stroke:1px rgba(124,92,255,.75);
  font-variant-numeric:tabular-nums;margin-bottom:14px;
}
.c-quick-card h3{font-size:18px;font-weight:600;color:var(--text-1);margin-bottom:8px}
.c-quick-card p{font-size:14px;line-height:1.7;color:var(--text-2)}
.c-quick-card .go{
  display:inline-flex;align-items:center;gap:6px;
  margin-top:14px;font-size:13px;color:var(--teal);
}
.c-quick-card:hover .go{color:var(--primary-lift)}

/* ---------- FAQ 主体 ---------- */
.b-faq{padding:var(--gap) 0}
.faq-layout{
  display:grid;grid-template-columns:240px 1fr;gap:56px;align-items:start;
}
.faq-aside{
  position:sticky;top:104px;
  border-right:1px solid var(--line);
  padding-right:24px;
}
.faq-aside .aside-title{
  font-size:13px;letter-spacing:.12em;color:var(--text-3);
  margin-bottom:16px;text-transform:uppercase;
}
.c-aside-link{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:10px 12px 10px 14px;margin-bottom:4px;
  font-size:14px;color:var(--text-2);border-radius:10px;
  border-left:3px solid transparent;
  transition:background .2s ease-out,color .2s ease-out,border-color .2s ease-out;
}
.c-aside-link span{
  font-size:12px;color:var(--text-3);font-variant-numeric:tabular-nums;
}
.c-aside-link:hover{background:var(--bg-2);color:var(--text-1)}
.c-aside-link.active{
  border-left-color:var(--primary);background:rgba(124,92,255,.1);color:var(--text-1);
}
.c-aside-link.active span{color:var(--accent)}
.aside-tip{
  margin-top:22px;padding:16px;
  background:var(--bg-2);border:1px solid var(--line);border-radius:12px;
  font-size:13px;line-height:1.7;color:var(--text-2);
}
.aside-tip strong{display:block;color:var(--text-1);font-size:13px;margin-bottom:6px;font-weight:600}

.faq-main{min-width:0}
.faq-group{margin-bottom:56px;scroll-margin-top:110px}
.faq-group:last-child{margin-bottom:0}
.faq-group > h2{
  position:relative;font-size:30px;font-weight:700;line-height:1.35;
  padding-left:16px;margin-bottom:8px;
}
.faq-group > h2::before{
  content:"";position:absolute;left:0;top:8px;bottom:8px;width:4px;
  border-radius:2px;background:var(--primary);
}
.faq-group > .group-desc{
  font-size:14px;color:var(--text-2);padding-left:16px;margin-bottom:24px;
}
.c-faq-item{
  background:var(--bg-2);border:1px solid var(--line);border-radius:var(--r-card);
  margin-bottom:12px;overflow:hidden;
  transition:border-color .2s ease-out,box-shadow .2s ease-out;
}
.c-faq-item:hover{border-color:var(--primary)}
.c-faq-item[open]{box-shadow:var(--shadow)}
.c-faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 24px;cursor:pointer;list-style:none;
  font-size:16px;font-weight:600;color:var(--text-1);line-height:1.6;
}
.c-faq-item summary::-webkit-details-marker{display:none}
.c-faq-item summary::marker{content:""}
.c-faq-item summary::after{
  content:"+";flex:0 0 auto;width:22px;height:22px;
  display:flex;align-items:center;justify-content:center;
  font-size:20px;font-weight:400;line-height:1;color:var(--primary);
  transition:transform .2s ease-out,color .2s ease-out;
}
.c-faq-item[open] summary::after{transform:rotate(45deg);color:var(--accent)}
.faq-body{
  padding:0 24px 22px;
  border-top:1px solid var(--line);
  margin-top:0;
}
.faq-body p{
  font-size:15px;line-height:1.85;color:var(--text-2);
  padding-top:18px;
}
.faq-body p + p{margin-top:12px}
.faq-body ul{margin-top:14px}
.faq-body li{
  position:relative;padding-left:18px;
  font-size:15px;line-height:1.85;color:var(--text-2);margin-bottom:8px;
}
.faq-body li::before{
  content:"";position:absolute;left:0;top:12px;
  width:6px;height:6px;border-radius:50%;background:var(--primary);
}
.faq-body .note{
  display:block;margin-top:16px;padding:12px 16px;
  border-left:3px solid var(--accent);background:rgba(255,181,92,.07);
  border-radius:0 10px 10px 0;font-size:14px;line-height:1.7;color:var(--text-2);
}

/* ---------- 反馈 CTA ---------- */
.b-feedback{
  padding:0 0 var(--gap);
}
.feedback-inner{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:24px;
  background:var(--bg-1);
  border:1px solid var(--line);border-radius:var(--r-card);
  padding:32px 36px;
  box-shadow:var(--shadow);
}
.feedback-inner h2{font-size:22px;font-weight:600;line-height:1.45;margin-bottom:8px}
.feedback-inner p{font-size:14px;line-height:1.7;color:var(--text-2);max-width:640px}
.feedback-inner .c-btn{flex:0 0 auto}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--bg-1);
  border-top:1px solid var(--line);
  padding:72px 0 28px;
}
.footer-grid{
  display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;
}
.footer-brand .logo{margin-bottom:16px}
.footer-desc{font-size:14px;line-height:1.75;color:var(--text-2);max-width:280px}
.footer-status{
  display:flex;align-items:center;gap:8px;margin-top:18px;
  font-size:13px;color:var(--text-3);
}
.footer-status .dot{
  width:7px;height:7px;border-radius:50%;background:var(--teal);
  box-shadow:0 0 0 4px rgba(79,209,197,.16);
}
.footer-col h4{
  font-size:14px;font-weight:600;color:var(--text-1);
  margin-bottom:16px;letter-spacing:.04em;
}
.footer-col ul li{margin-bottom:10px}
.footer-col ul a{font-size:14px;color:var(--text-2)}
.footer-col ul a:hover{color:var(--text-1);text-decoration:underline;text-underline-offset:3px}
.footer-badge-box{
  display:flex;flex-wrap:wrap;gap:8px;margin-top:18px;
}
.footer-badge-box span{
  display:inline-flex;align-items:center;
  padding:4px 12px;border-radius:var(--r-pill);
  border:1px solid var(--line);background:var(--bg-2);
  font-size:12px;color:var(--text-2);letter-spacing:.04em;
}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;
  margin-top:48px;padding-top:24px;border-top:1px solid var(--line);
  font-size:13px;color:var(--text-3);
}
.foot-note{display:flex;flex-wrap:wrap;gap:8px 24px}
.to-top{
  width:40px;height:40px;border-radius:50%;
  background:transparent;border:1px solid var(--line);color:var(--text-2);
  font-size:16px;line-height:1;cursor:pointer;
  transition:border-color .2s ease-out,color .2s ease-out,transform .2s ease-out;
}
.to-top:hover{border-color:var(--primary);color:var(--text-1);transform:translateY(-2px)}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .nav-links{gap:16px}
  .nav-cta{display:none}
  .b-page-hero h1{font-size:38px}
}
@media (max-width:1023px){
  :root{--gap:72px}
  .nav-links{display:none}
  .nav-search{max-width:none}
  .hamburger{display:flex}
  .header-inner{gap:16px;height:72px}
  .b-page-hero{padding:44px 0 52px}
  .b-page-hero h1{font-size:36px}
  .quick-grid{grid-template-columns:1fr;gap:16px}
  .faq-layout{grid-template-columns:1fr;gap:0}
  .faq-aside{
    position:static;border-right:0;padding-right:0;
    border-bottom:1px solid var(--line);padding-bottom:16px;margin-bottom:32px;
  }
  .faq-aside .aside-list{
    display:flex;gap:10px;overflow-x:auto;padding-bottom:6px;
    scroll-snap-type:x mandatory;-webkit-overflow-scrolling:touch;
  }
  .faq-aside .aside-list::-webkit-scrollbar{height:4px}
  .faq-aside .aside-list::-webkit-scrollbar-thumb{background:var(--bg-3);border-radius:2px}
  .c-aside-link{
    flex:0 0 auto;scroll-snap-align:start;white-space:nowrap;
    border-left:0;border:1px solid var(--line);border-radius:var(--r-pill);
    padding:8px 16px;margin-bottom:0;
  }
  .c-aside-link.active{border-color:var(--primary);background:rgba(124,92,255,.16)}
  .aside-tip{display:none}
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:32px}
  .feedback-inner{padding:28px}
}
@media (max-width:767px){
  .container{padding:0 18px}
  body{font-size:16px}
  .b-page-hero h1{font-size:30px}
  .page-hero-sub{font-size:15px}
  .quick-head h2{font-size:24px}
  .faq-group > h2{font-size:24px}
  .c-faq-item summary{font-size:15px;padding:18px 20px}
  .faq-body{padding:0 20px 20px}
  .feedback-inner{flex-direction:column;align-items:flex-start;padding:24px}
  .feedback-inner .c-btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .site-footer{padding:56px 0 24px}
}
@media (max-width:519px){
  .header-inner{height:64px;gap:12px}
  .logo{min-width:auto}
  .logo-main{font-size:19px}
  .logo-sub{font-size:10px;letter-spacing:.1em}
  .nav-search{display:none}
  .b-page-hero{padding:36px 0 44px}
  .b-page-hero h1{font-size:27px}
  .hero-meta{font-size:12px;gap:8px 16px}
  .b-quick{padding-top:48px}
  .quick-head{gap:8px}
  .c-quick-card{padding:20px}
  .faq-group > h2{font-size:22px}
  .c-faq-item summary{font-size:15px}
  .faq-body p,.faq-body li{font-size:14px}
  .to-top{align-self:flex-end}
}

/* roulang page: category5 */
:root{
  --bg-0:#0A0818;
  --bg-1:#120E26;
  --bg-2:#1A1533;
  --bg-3:#241D45;
  --line:rgba(160,140,255,.16);
  --line-strong:rgba(160,140,255,.32);
  --text-1:#F4F1FF;
  --text-2:#B9AEE0;
  --text-3:#7E74A8;
  --primary:#7C5CFF;
  --primary-light:#8F73FF;
  --primary-deep:#5B3FE0;
  --accent:#FFB55C;
  --teal:#4FD1C5;
  --r-card:16px;
  --r-pill:999px;
  --shadow:0 10px 28px rgba(10,7,26,.5);
  --shadow-hover:0 0 0 1px rgba(124,92,255,.5),0 16px 40px rgba(94,63,224,.28);
  --container:1200px;
  --gap:24px;
  --section-y:96px;
}
*,*::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:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:17px;
  line-height:1.85;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:12px;}
a{color:var(--teal);text-decoration:none;transition:color .2s ease-out,text-decoration-color .2s ease-out;}
a:hover{color:var(--text-1);text-decoration:underline;text-underline-offset:3px;}
button{font-family:inherit;}
h1,h2,h3,h4{margin:0;color:var(--text-1);font-weight:700;letter-spacing:.01em;}
h1{font-size:46px;line-height:1.25;}
h2{font-size:32px;line-height:1.35;}
h3{font-size:22px;line-height:1.45;font-weight:600;}
h4{font-size:17px;line-height:1.5;font-weight:600;}
p{margin:0 0 1.4em;}
p:last-child{margin-bottom:0;}
ul,ol{margin:0 0 1.4em;padding-left:1.3em;}
li{margin-bottom:.5em;}
:focus-visible{outline:2px solid var(--teal);outline-offset:2px;}
::selection{background:rgba(124,92,255,.45);color:#fff;}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}
.narrow{max-width:820px;}
.section{padding:var(--section-y) 0;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px;flex-wrap:wrap;}
.section-head h2{position:relative;padding-left:18px;}
.section-head h2::before{content:"";position:absolute;left:0;top:.18em;bottom:.18em;width:4px;border-radius:2px;background:var(--primary);}
.section-lead{color:var(--text-2);font-size:15px;max-width:640px;margin-top:10px;}
.more-link{color:var(--teal);font-size:14px;display:inline-flex;align-items:center;gap:8px;white-space:nowrap;}
.more-link i{font-size:12px;transition:transform .2s ease-out;}
.more-link:hover{text-decoration:none;color:var(--text-1);}
.more-link:hover i{transform:translateX(3px);}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 28px;border-radius:var(--r-pill);border:1px solid transparent;
  font-size:15px;font-weight:600;line-height:1;cursor:pointer;
  transition:transform .2s ease-out,background-color .2s ease-out,border-color .2s ease-out,box-shadow .2s ease-out,color .2s ease-out;
}
.btn-primary{background:var(--primary);color:#F8F6FF;box-shadow:0 8px 22px rgba(91,63,224,.32);}
.btn-primary:hover{background:var(--primary-light);color:#fff;transform:translateY(-2px);text-decoration:none;}
.btn-primary:active{background:var(--primary-deep);transform:translateY(1px);}
.btn-ghost{background:transparent;color:var(--text-1);border-color:rgba(255,255,255,.22);}
.btn-ghost:hover{background:rgba(124,92,255,.12);border-color:var(--primary);color:var(--text-1);text-decoration:none;transform:translateY(-2px);}
.btn-ghost:active{transform:translateY(1px);}
.btn-block{width:100%;}

/* 徽章 / 标签 */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:var(--r-pill);
  border:1px solid rgba(255,181,92,.55);
  color:var(--accent);background:transparent;
  font-size:12px;letter-spacing:.06em;line-height:1.6;
}
.badge-teal{border-color:rgba(79,209,197,.5);color:var(--teal);}
.tag{display:inline-block;padding:4px 10px;border-radius:var(--r-pill);background:var(--bg-3);color:var(--text-2);font-size:12px;letter-spacing:.04em;}

/* 顶部导航 */
.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--bg-1);
  border-bottom:1px solid var(--line);
}
.header-inner{
  max-width:var(--container);margin:0 auto;padding:0 24px;
  height:80px;display:flex;align-items:center;gap:24px;
}
.logo{display:flex;flex-direction:column;line-height:1.1;color:var(--text-1);flex-shrink:0;}
.logo:hover{text-decoration:none;color:var(--text-1);}
.logo-main{font-size:21px;font-weight:700;letter-spacing:.16em;}
.logo-sub{font-size:11px;letter-spacing:.12em;color:var(--text-3);margin-top:4px;}
.nav-search{flex:1 1 auto;max-width:560px;}
.search-form{
  display:flex;align-items:center;gap:10px;
  height:48px;padding:4px 4px 4px 16px;
  background:#0F0B22;border:1px solid var(--line);border-radius:var(--r-pill);
  transition:border-color .2s ease-out,box-shadow .2s ease-out;
}
.search-form:focus-within{border-color:var(--primary);box-shadow:0 0 0 4px rgba(124,92,255,.22);}
.search-form i{color:var(--text-3);font-size:15px;}
.search-form input{
  flex:1 1 auto;min-width:0;background:transparent;border:0;color:var(--text-1);
  font-size:14px;line-height:1.5;padding:10px 0;
}
.search-form input::placeholder{color:var(--text-3);}
.search-form input:focus{outline:none;}
.search-form button{
  flex-shrink:0;height:40px;padding:0 20px;border:0;border-radius:var(--r-pill);
  background:var(--primary);color:#fff;font-size:14px;font-weight:600;cursor:pointer;
  transition:background-color .2s ease-out;
}
.search-form button:hover{background:var(--primary-light);}
.nav-links{display:flex;align-items:center;gap:26px;margin-left:auto;}
.nav-links a{
  position:relative;color:var(--text-2);font-size:14px;padding:6px 0;white-space:nowrap;
  transition:color .2s ease-out;
}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--primary);
  transform:scaleX(0);transform-origin:left;transition:transform .2s ease-out;
}
.nav-links a:hover{color:var(--text-1);text-decoration:none;}
.nav-links a:hover::after,.nav-links a.active::after{transform:scaleX(1);}
.nav-links a.active{color:var(--text-1);}
.header-cta{flex-shrink:0;padding:12px 22px;font-size:14px;}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--line);
  background:var(--bg-2);color:var(--text-1);font-size:17px;cursor:pointer;
  align-items:center;justify-content:center;
}
.mobile-drawer{
  display:none;border-top:1px solid var(--line);background:var(--bg-1);
  padding:20px 24px 28px;
}
.mobile-drawer.is-open{display:block;}
.drawer-links{display:flex;flex-direction:column;margin:18px 0 20px;}
.drawer-links a{
  display:flex;align-items:center;min-height:48px;color:var(--text-2);font-size:15px;
  border-bottom:1px solid var(--line);
}
.drawer-links a.active{color:var(--text-1);}
.drawer-links a:hover{color:var(--text-1);text-decoration:none;}

/* 面包屑 */
.crumb-bar{background:var(--bg-0);border-bottom:1px solid var(--line);}
.crumb{display:flex;align-items:center;gap:10px;padding:16px 0;font-size:14px;color:var(--text-3);flex-wrap:wrap;}
.crumb a{color:var(--text-3);}
.crumb a:hover{color:var(--text-1);text-decoration:none;}
.crumb span.sep{color:var(--line-strong);}
.crumb .current{color:var(--text-2);}

/* 页面头部 */
.page-hero{
  position:relative;overflow:hidden;
  background-color:#0B0819;
  background-image:linear-gradient(90deg,rgba(10,8,24,.94) 0%,rgba(10,8,24,.78) 52%,rgba(10,8,24,.45) 100%),url("/assets/images/backpic/back-2.webp");
  background-size:cover;background-position:center;
  border-bottom:1px solid var(--line);
}
.page-hero::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:120px;
  background:linear-gradient(180deg,rgba(10,8,24,0) 0%,var(--bg-0) 100%);
  pointer-events:none;
}
.page-hero-inner{position:relative;z-index:2;padding:64px 0 76px;max-width:720px;}
.page-hero h1{font-size:42px;margin:18px 0 16px;}
.page-hero .sub{font-size:17px;color:var(--text-2);max-width:620px;margin-bottom:26px;}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;}
.hero-meta{
  display:flex;gap:22px;flex-wrap:wrap;margin-top:26px;
  font-size:12px;color:var(--text-3);letter-spacing:.04em;
}
.hero-meta span{display:inline-flex;align-items:center;gap:7px;}
.hero-meta i{color:var(--primary);font-size:11px;}
.dot{width:7px;height:7px;border-radius:50%;background:var(--teal);display:inline-block;box-shadow:0 0 0 3px rgba(79,209,197,.16);}

/* 速览图文块 */
.overview-grid{display:grid;grid-template-columns:5fr 7fr;gap:48px;align-items:center;}
.overview-figure{position:relative;border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow);}
.overview-figure img{width:100%;height:100%;aspect-ratio:16/10;object-fit:cover;border-radius:0;background:var(--bg-3);}
.overview-figure .figure-cap{
  position:absolute;left:0;right:0;bottom:0;padding:16px 18px;font-size:13px;color:var(--text-2);
  background:linear-gradient(180deg,rgba(10,8,24,0) 0%,rgba(10,8,24,.9) 100%);
}
.overview-body h2{padding-left:18px;position:relative;margin-bottom:20px;}
.overview-body h2::before{content:"";position:absolute;left:0;top:.18em;bottom:.18em;width:4px;border-radius:2px;background:var(--primary);}
.overview-body p{color:var(--text-2);font-size:16px;}
.fact-list{list-style:none;padding:0;margin:24px 0 0;display:grid;gap:14px;}
.fact-list li{
  display:flex;gap:12px;align-items:flex-start;
  padding:14px 16px;border:1px solid var(--line);border-radius:12px;background:var(--bg-2);
  font-size:15px;color:var(--text-2);
}
.fact-list i{color:var(--accent);margin-top:5px;font-size:13px;}

/* 统计卡 */
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--gap);}
.stat-card{
  padding:24px;border-radius:var(--r-card);border:1px solid var(--line);background:var(--bg-2);
  transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
}
.stat-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:var(--primary);}
.stat-num{font-size:32px;font-weight:700;color:var(--text-1);font-variant-numeric:tabular-nums;line-height:1.2;}
.stat-num em{font-style:normal;font-size:15px;color:var(--text-3);margin-left:6px;font-weight:500;}
.stat-label{font-size:13px;color:var(--text-3);letter-spacing:.06em;margin-top:8px;}

/* 时间线 */
.timeline{position:relative;}
.timeline-month{
  display:flex;align-items:center;gap:14px;margin:0 0 22px;
  font-size:13px;letter-spacing:.12em;color:var(--text-3);
  font-variant-numeric:tabular-nums;
}
.timeline-month::after{content:"";flex:1;height:1px;background:var(--line);}
.tl-item{
  display:grid;grid-template-columns:120px 1fr;gap:24px;
  position:relative;padding-bottom:28px;
}
.tl-item::before{
  content:"";position:absolute;left:127px;top:16px;bottom:-4px;width:1px;
  background:linear-gradient(180deg,var(--line-strong),var(--line));
}
.tl-item:last-child::before{display:none;}
.tl-date{
  font-size:12px;color:var(--text-3);font-variant-numeric:tabular-nums;letter-spacing:.06em;
  padding-top:18px;text-align:right;
}
.tl-date strong{display:block;font-size:15px;color:var(--text-2);font-weight:600;letter-spacing:.04em;}
.tl-node{
  position:absolute;left:120px;top:22px;width:14px;height:14px;border-radius:50%;
  background:var(--bg-0);border:1px solid var(--primary);display:flex;align-items:center;justify-content:center;
}
.tl-node::after{content:"";width:8px;height:8px;border-radius:50%;background:var(--primary);}
.tl-card{
  margin-left:32px;
  padding:22px 24px;border-radius:var(--r-card);border:1px solid var(--line);background:var(--bg-2);
  transition:transform .2s ease-out,border-color .2s ease-out,box-shadow .2s ease-out;
}
.tl-card:hover{transform:translateY(-2px);border-color:var(--primary);box-shadow:var(--shadow-hover);}
.tl-card-head{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:12px;}
.tl-card h3{font-size:19px;}
.tl-card ul{list-style:none;padding:0;margin:0 0 14px;display:grid;gap:8px;}
.tl-card ul li{
  position:relative;padding-left:18px;font-size:15px;color:var(--text-2);margin:0;line-height:1.75;
}
.tl-card ul li::before{
  content:"";position:absolute;left:0;top:.72em;width:6px;height:6px;border-radius:50%;
  background:var(--primary);opacity:.85;
}
.tl-link{font-size:14px;display:inline-flex;align-items:center;gap:8px;color:var(--teal);}
.tl-link i{font-size:11px;transition:transform .2s ease-out;}
.tl-link:hover{text-decoration:none;color:var(--text-1);}
.tl-link:hover i{transform:translateX(3px);}

/* 步骤 */
.steps{display:grid;gap:12px;}
.step{
  display:grid;grid-template-columns:auto 1fr;gap:24px;align-items:flex-start;
  padding:24px;border-radius:var(--r-card);border:1px solid var(--line);background:var(--bg-2);
}
.step-num{
  font-size:40px;line-height:1;font-weight:800;color:transparent;
  -webkit-text-stroke:1px var(--primary);font-variant-numeric:tabular-nums;
  min-width:64px;
}
.step h3{font-size:19px;margin-bottom:8px;}
.step p{font-size:15px;color:var(--text-2);margin:0;}

/* FAQ */
.faq-list{display:grid;gap:12px;}
.faq-item{
  border:1px solid var(--line);border-radius:var(--r-card);background:var(--bg-2);
  padding:0 24px;transition:border-color .2s ease-out,box-shadow .2s ease-out;
}
.faq-item:hover{border-color:var(--primary);}
.faq-item[open]{box-shadow:var(--shadow);}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 0;font-size:16px;font-weight:600;color:var(--text-1);
  min-height:44px;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"+";font-size:22px;font-weight:400;color:var(--primary);line-height:1;
  transition:transform .2s ease-out;
}
.faq-item[open] summary::after{transform:rotate(45deg);}
.faq-body{
  border-top:1px solid var(--line);padding:16px 0 22px;font-size:15px;color:var(--text-2);
}
.faq-body p{margin-bottom:.9em;}

/* CTA */
.cta-band{
  position:relative;overflow:hidden;
  background:var(--bg-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(244,241,255,.06) 1px,transparent 1px);
  background-size:26px 26px;opacity:.6;pointer-events:none;
}
.cta-inner{position:relative;z-index:2;padding:88px 0;text-align:center;}
.cta-inner h2{font-size:34px;margin-bottom:14px;}
.cta-inner p{color:var(--text-2);font-size:16px;margin-bottom:30px;}
.cta-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;}

/* 页脚 */
.site-footer{background:var(--bg-1);border-top:1px solid var(--line);padding:72px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;}
.footer-brand .logo{margin-bottom:18px;}
.footer-desc{font-size:14px;color:var(--text-2);max-width:280px;line-height:1.8;}
.footer-status{display:flex;align-items:center;gap:8px;font-size:12px;color:var(--text-3);margin-top:16px;letter-spacing:.04em;}
.footer-col h4{font-size:14px;color:var(--text-1);margin-bottom:16px;letter-spacing:.06em;}
.footer-col ul{list-style:none;padding:0;margin:0;display:grid;gap:10px;}
.footer-col li{margin:0;}
.footer-col a{font-size:14px;color:var(--text-2);}
.footer-col a:hover{color:var(--text-1);text-decoration:underline;text-underline-offset:3px;}
.footer-badge-box{display:flex;gap:8px;flex-wrap:wrap;margin-top:16px;}
.footer-badge-box span{
  font-size:12px;padding:4px 10px;border-radius:var(--r-pill);
  border:1px solid var(--line);color:var(--text-3);
}
.footer-bottom{
  margin-top:56px;padding:22px 0 28px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;
  font-size:13px;color:var(--text-3);
}
.foot-note{display:flex;gap:18px;flex-wrap:wrap;}
.to-top{
  width:40px;height:40px;border-radius:50%;border:1px solid var(--line);background:transparent;
  color:var(--text-2);cursor:pointer;font-size:15px;
  transition:border-color .2s ease-out,color .2s ease-out,transform .2s ease-out;
}
.to-top:hover{border-color:var(--primary);color:var(--text-1);transform:translateY(-2px);}

/* 响应式 */
@media (max-width:1023px){
  :root{--section-y:72px;}
  h1{font-size:36px;}
  h2{font-size:26px;}
  .header-inner{height:72px;gap:16px;}
  .nav-links{display:none;}
  .nav-search{max-width:none;}
  .header-cta{display:none;}
  .nav-toggle{display:flex;margin-left:auto;}
  .page-hero h1{font-size:34px;}
  .overview-grid{grid-template-columns:1fr;gap:32px;}
  .stats-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .tl-item{grid-template-columns:88px 1fr;gap:16px;}
  .tl-item::before{left:87px;}
  .tl-node{left:81px;top:22px;}
  .tl-date{text-align:left;padding-top:10px;}
  .tl-card{margin-left:24px;}
}
@media (max-width:767px){
  :root{--section-y:56px;--gap:16px;}
  body{font-size:16px;}
  h1{font-size:30px;}
  h2{font-size:24px;}
  h3{font-size:18px;}
  .container{padding:0 18px;}
  .header-inner{padding:0 18px;height:64px;}
  .nav-search{display:none;}
  .page-hero-inner{padding:44px 0 56px;}
  .page-hero h1{font-size:28px;}
  .page-hero .sub{font-size:15px;}
  .hero-actions .btn{width:100%;}
  .tl-item{grid-template-columns:1fr;gap:10px;padding-bottom:20px;}
  .tl-item::before{left:6px;top:34px;}
  .tl-node{left:0;top:26px;width:12px;height:12px;}
  .tl-node::after{width:6px;height:6px;}
  .tl-date{text-align:left;padding:0 0 0 26px;}
  .tl-date strong{display:inline;margin-right:8px;}
  .tl-card{margin-left:26px;padding:18px;}
  .step{grid-template-columns:1fr;gap:8px;padding:20px;}
  .step-num{font-size:32px;min-width:0;}
  .stats-grid{grid-template-columns:1fr 1fr;}
  .cta-inner{padding:56px 0;}
  .cta-inner h2{font-size:24px;}
  .cta-actions .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;gap:32px;}
  .site-footer{padding-top:56px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:14px;}
  .mobile-drawer .search-form{display:flex;}
  .faq-item{padding:0 18px;}
  .overview-body h2{font-size:22px;}
}
@media (min-width:1440px){
  :root{--container:1280px;}
}