/* roulang page: index */
:root{
  --brand:#6D4DF6;
  --brand-deep:#4A2FD1;
  --accent:#35E0C4;
  --pink:#FF6FA5;
  --gold:#E5C172;
  --ink:#0C0A14;
  --panel:#15121F;
  --moon:#F4F2F8;
  --white:#FFFFFF;
  --t-on-dark:#F3F1F9;
  --t-on-dark-muted:#9C96B0;
  --t-on-light:#12101A;
  --t-on-light-muted:#5B5670;
  --line-dark:rgba(255,255,255,.08);
  --line-light:rgba(18,16,26,.10);
  --r:14px;
  --r-lg:18px;
  --r-pill:999px;
  --sh-1:0 2px 8px rgba(12,10,20,.06);
  --sh-2:0 18px 48px rgba(12,10,20,.14);
  --ease:cubic-bezier(.2,.7,.3,1);
  --bs-body-font-family:"HarmonyOS Sans SC","Source Han Sans SC","Noto Sans SC","PingFang SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --bs-body-color:#12101A;
  --bs-body-bg:#FFFFFF;
  --bs-border-color:rgba(18,16,26,.10);
  --bs-border-radius:14px;
  --bs-border-radius-lg:18px;
  --bs-link-color:#6D4DF6;
  --bs-link-hover-color:#4A2FD1;
  --bs-primary:#6D4DF6;
  --bs-primary-rgb:109,77,246;
  --bs-font-sans-serif:"HarmonyOS Sans SC","Source Han Sans SC","Noto Sans SC","PingFang SC",system-ui,sans-serif;
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--bs-body-font-family);
  font-size:16px;
  line-height:1.85;
  color:var(--t-on-light);
  background:var(--white);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease);}
a:hover{color:var(--brand);}
button,input,textarea,select{font:inherit;color:inherit;}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.02em;line-height:1.2;color:var(--t-on-light);}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px;}
.container{max-width:1200px;padding-left:20px;padding-right:20px;}
@media(min-width:1400px){.container{max-width:1280px;}}

/* 通用按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;padding:12px 26px;border:1px solid transparent;cursor:pointer;
  transition:background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),transform .22s var(--ease);}
.btn-solid{background:var(--brand);color:#fff;}
.btn-solid:hover{background:var(--accent);color:#08110F;transform:translateY(-2px);}
.btn-ghost{background:transparent;border-color:rgba(255,255,255,.28);color:var(--t-on-dark);}
.btn-ghost:hover{border-color:var(--brand);background:rgba(109,77,246,.16);color:#fff;}
.btn-ghost-dark{background:transparent;border-color:rgba(18,16,26,.20);color:var(--t-on-light);}
.btn-ghost-dark:hover{border-color:var(--brand);background:rgba(109,77,246,.08);color:var(--brand-deep);}
.btn-sm{padding:9px 18px;font-size:14px;}
.arrow-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand);position:relative;}
.arrow-link::after{content:"";position:absolute;left:0;bottom:-3px;width:0;height:1px;background:var(--brand);transition:width .28s var(--ease);}
.arrow-link:hover::after{width:100%;}

/* 标签 */
.tag{display:inline-flex;align-items:center;gap:6px;font-size:12px;letter-spacing:.14em;font-weight:600;
  padding:5px 12px;border-radius:var(--r-pill);background:rgba(109,77,246,.10);color:var(--brand-deep);}
.tag::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--pink);}
.tag-dark{background:rgba(53,224,196,.12);color:var(--accent);}
.tag-dark::before{background:var(--gold);}

/* 导航 */
.site-header{position:fixed;top:0;left:0;right:0;z-index:1030;transition:background .3s var(--ease),box-shadow .3s var(--ease),border-color .3s var(--ease);
  border-bottom:1px solid transparent;}
.site-header.is-stuck{background:rgba(12,10,20,.92);border-bottom-color:var(--line-dark);box-shadow:0 10px 30px rgba(0,0,0,.28);}
.hd-inner{display:flex;align-items:center;gap:22px;height:72px;}
.logo{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;}
.logo-mark{width:28px;height:28px;display:inline-grid;place-items:center;border-radius:9px;background:linear-gradient(140deg,var(--brand),#3B22A8);}
.logo-mark svg{width:16px;height:16px;fill:none;stroke:#fff;stroke-width:1.6;stroke-linecap:round;}
.logo-text{font-size:17px;font-weight:700;letter-spacing:-.01em;color:#fff;white-space:nowrap;}
.logo-text em{font-style:normal;color:var(--accent);}
.hd-nav{display:flex;align-items:center;gap:26px;margin-left:6px;}
.hd-nav a{position:relative;font-size:15px;color:rgba(243,241,249,.78);padding:6px 0;}
.hd-nav a::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--accent);transform:scaleX(0);transform-origin:left;transition:transform .26s var(--ease);}
.hd-nav a:hover{color:#fff;}
.hd-nav a:hover::after{transform:scaleX(1);}
.hd-nav a.active{color:#fff;}
.hd-nav a.active::after{transform:scaleX(1);}
.hd-right{margin-left:auto;display:flex;align-items:center;gap:12px;}
.hd-search{position:relative;width:220px;}
.hd-search input{width:100%;height:38px;border-radius:var(--r-pill);border:1px solid rgba(255,255,255,.16);
  background:rgba(255,255,255,.06);color:#fff;font-size:13.5px;padding:0 40px 0 16px;outline:none;transition:border-color .22s var(--ease),background .22s var(--ease);}
.hd-search input::placeholder{color:rgba(243,241,249,.45);}
.hd-search input:focus{border-color:var(--brand);background:rgba(255,255,255,.10);}
.hd-search button{position:absolute;right:4px;top:4px;width:30px;height:30px;border:0;background:transparent;border-radius:50%;
  display:grid;place-items:center;cursor:pointer;}
.hd-search button svg{width:15px;height:15px;stroke:rgba(243,241,249,.7);fill:none;stroke-width:1.8;}
.hd-login{font-size:14.5px;color:rgba(243,241,249,.8);}
.hd-login:hover{color:var(--accent);}
.nav-toggle{display:none;width:42px;height:42px;border-radius:12px;border:1px solid rgba(255,255,255,.2);background:transparent;cursor:pointer;}
.nav-toggle span{display:block;width:18px;height:1.6px;background:#fff;margin:4px auto;transition:transform .25s var(--ease),opacity .25s var(--ease);}
.m-drawer{position:fixed;inset:72px 0 auto 0;background:rgba(12,10,20,.98);border-bottom:1px solid var(--line-dark);
  padding:18px 20px 26px;transform:translateY(-14px);opacity:0;pointer-events:none;transition:opacity .26s var(--ease),transform .26s var(--ease);z-index:1029;}
.m-drawer.open{opacity:1;transform:none;pointer-events:auto;}
.m-drawer a{display:block;padding:13px 4px;font-size:16px;color:var(--t-on-dark);border-bottom:1px solid var(--line-dark);}
.m-drawer a.active{color:var(--accent);}
.m-drawer .m-btn{margin-top:16px;width:100%;}

/* Hero */
.hero{position:relative;background:var(--ink);overflow:hidden;padding:150px 0 96px;}
.hero-bg{position:absolute;inset:0;background:url(/assets/images/backpic/back-1.png) center/cover no-repeat;}
.hero-bg::after{content:"";position:absolute;inset:0;background:linear-gradient(115deg,rgba(12,10,20,.90) 0%,rgba(12,10,20,.68) 55%,rgba(12,10,20,.86) 100%);}
.hero-stars{position:absolute;inset:0;background-image:radial-gradient(rgba(255,255,255,.6) 1px,transparent 1px);background-size:36px 36px;opacity:.10;}
.hero-inner{position:relative;z-index:2;display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:center;}
.hero h1{font-size:clamp(40px,6.2vw,84px);font-weight:800;line-height:1.06;letter-spacing:-.03em;color:#fff;max-width:14em;}
.hero h1 span{color:var(--accent);}
.hero-sub{margin-top:24px;font-size:clamp(16px,1.5vw,19px);line-height:1.7;color:rgba(243,241,249,.72);max-width:34em;}
.hero-actions{margin-top:34px;display:flex;flex-wrap:wrap;gap:14px;}
.hero-facts{margin-top:30px;display:flex;flex-wrap:wrap;gap:22px;font-size:13px;letter-spacing:.02em;color:rgba(243,241,249,.5);}
.hero-facts span{display:inline-flex;align-items:center;gap:8px;}
.hero-facts span::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--accent);}
.hero-card{background:rgba(21,18,31,.86);border:1px solid var(--line-dark);border-radius:var(--r-lg);padding:28px;backdrop-filter:none;box-shadow:var(--sh-2);}
.hero-card h2{font-size:15px;font-weight:600;color:var(--t-on-dark-muted);letter-spacing:.08em;}
.hero-card-grid{margin-top:20px;display:grid;grid-template-columns:1fr 1fr;gap:18px;}
.hero-stat{border-left:2px solid rgba(53,224,196,.5);padding-left:12px;}
.hero-stat b{display:block;font-family:"Space Grotesk",Inter,ui-monospace,monospace;font-size:30px;font-weight:700;color:var(--accent);letter-spacing:-.02em;line-height:1.2;}
.hero-stat small{display:block;margin-top:4px;font-size:12.5px;color:var(--t-on-dark-muted);letter-spacing:.04em;}
.hero-shot{margin-top:22px;border-radius:16px;overflow:hidden;border:1px solid var(--line-dark);}
.hero-shot img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.hero-shot figcaption{margin-top:10px;font-size:12px;color:rgba(243,241,249,.45);}

/* 板块通用 */
.section{padding:104px 0;}
.section-tight{padding:84px 0;}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:44px;}
.sec-title{display:flex;align-items:flex-start;gap:14px;}
.sec-num{font-family:"Space Grotesk",Inter,ui-monospace,monospace;font-size:14px;font-weight:700;color:var(--brand);letter-spacing:.06em;padding-top:10px;}
.sec-title h2{font-size:clamp(28px,3.4vw,44px);font-weight:700;line-height:1.18;letter-spacing:-.02em;}
.sec-title h2::before{content:"";display:block;width:3px;height:0;}
.sec-desc{margin-top:12px;font-size:15.5px;color:var(--t-on-light-muted);max-width:52em;}
.bg-moon{background:var(--moon);}
.bg-ink{background:var(--ink);color:var(--t-on-dark);}
.bg-ink h2,.bg-ink h3{color:var(--t-on-dark);}

/* 服务区 */
.svc-grid{display:grid;grid-template-columns:5fr 7fr;gap:28px;align-items:stretch;}
.svc-main{background:var(--panel);color:var(--t-on-dark);border-radius:var(--r-lg);padding:40px 36px;border:1px solid var(--line-dark);display:flex;flex-direction:column;}
.svc-main h3{font-size:24px;font-weight:600;color:#fff;}
.svc-main p{margin-top:16px;font-size:15px;line-height:1.85;color:var(--t-on-dark-muted);}
.svc-main img{margin-top:26px;border-radius:var(--r);aspect-ratio:16/10;object-fit:cover;width:100%;}
.svc-main .arrow-link{margin-top:auto;padding-top:26px;color:var(--accent);}
.svc-main .arrow-link::after{background:var(--accent);}
.svc-list{display:flex;flex-direction:column;justify-content:center;}
.svc-item{display:grid;grid-template-columns:auto 1fr auto;gap:20px;align-items:center;padding:22px 18px;border-radius:var(--r);
  border-bottom:1px solid var(--line-light);transition:background .24s var(--ease),transform .24s var(--ease);}
.svc-item:hover{background:var(--moon);transform:translateX(4px);}
.svc-item .num{font-family:"Space Grotesk",Inter,ui-monospace,monospace;font-size:14px;font-weight:700;color:var(--brand);}
.svc-item h4{font-size:18px;font-weight:600;margin-bottom:4px;}
.svc-item p{font-size:14px;color:var(--t-on-light-muted);line-height:1.7;}
.svc-item .go{color:var(--brand);font-size:18px;transition:transform .24s var(--ease);}
.svc-item:hover .go{transform:translateX(4px);}

/* 数据带 */
.stats{background:var(--ink);padding:78px 0;position:relative;}
.stats::before{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(255,255,255,.55) 1px,transparent 1px);background-size:44px 44px;opacity:.07;}
.stats-grid{position:relative;display:grid;grid-template-columns:repeat(4,1fr);gap:26px;}
.stat-item{border:1px solid rgba(53,224,196,.28);border-radius:var(--r);padding:26px 22px;}
.stat-item b{display:block;font-family:"Space Grotesk",Inter,ui-monospace,monospace;font-size:clamp(34px,4vw,56px);font-weight:700;
  color:var(--accent);letter-spacing:-.03em;line-height:1.1;}
.stat-item span{display:block;margin-top:10px;font-size:13px;letter-spacing:.02em;color:var(--t-on-dark-muted);}

/* 案例轨道 */
.rail-wrap{position:relative;}
.rail{display:flex;gap:24px;overflow-x:auto;scroll-snap-type:x mandatory;padding-bottom:8px;scrollbar-width:none;}
.rail::-webkit-scrollbar{display:none;}
.rail-card{flex:0 0 calc((100% - 48px)/3);scroll-snap-align:start;background:#fff;border:1px solid var(--line-light);
  border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh-1);transition:transform .28s var(--ease),box-shadow .28s var(--ease),border-color .28s var(--ease);}
.rail-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:rgba(109,77,246,.4);}
.rail-card img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.rail-body{padding:22px 22px 26px;}
.rail-body h3{font-size:20px;font-weight:600;margin:14px 0 10px;line-height:1.4;}
.rail-body p{font-size:14.5px;color:var(--t-on-light-muted);line-height:1.8;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.rail-body .arrow-link{margin-top:16px;}
.rail-nav{display:flex;gap:10px;}
.rail-btn{width:42px;height:42px;border-radius:50%;border:1px solid rgba(18,16,26,.18);background:#fff;cursor:pointer;
  display:grid;place-items:center;transition:border-color .22s var(--ease),background .22s var(--ease),transform .22s var(--ease);}
.rail-btn:hover{border-color:var(--brand);background:rgba(109,77,246,.08);}
.rail-btn svg{width:16px;height:16px;stroke:var(--t-on-light);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;}

/* 资讯卡片 */
.news-card{background:#fff;border:1px solid var(--line-light);border-radius:var(--r-lg);overflow:hidden;height:100%;
  display:flex;flex-direction:column;transition:transform .28s var(--ease),box-shadow .28s var(--ease),border-color .28s var(--ease);}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:rgba(109,77,246,.4);}
.news-thumb{display:block;background:var(--panel);}
.news-thumb img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.news-body{padding:20px 22px 24px;display:flex;flex-direction:column;flex:1;}
.news-body h3{font-size:19px;font-weight:600;margin:14px 0 10px;line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-body h3 a:hover{color:var(--brand-deep);}
.news-sum{font-size:14px;color:var(--t-on-light-muted);line-height:1.8;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-meta{margin-top:auto;padding-top:18px;display:flex;align-items:center;justify-content:space-between;
  font-size:13px;letter-spacing:.02em;color:var(--t-on-light-muted);border-top:1px solid var(--line-light);margin-top:20px;}
.news-meta a{color:var(--brand);font-weight:600;}
.empty-state{grid-column:1/-1;min-height:220px;display:grid;place-items:center;text-align:center;gap:8px;
  border:1px dashed var(--line-light);border-radius:var(--r-lg);padding:40px 20px;background:#fff;}
.empty-state svg{width:38px;height:38px;stroke:var(--brand);fill:none;stroke-width:1.4;opacity:.6;margin:0 auto 14px;}
.empty-state p{font-size:15px;color:var(--t-on-light-muted);}
.empty-state a{display:inline-block;margin-top:10px;font-size:14px;font-weight:600;color:var(--brand);}

/* 方案交替 */
.plan-row{display:grid;grid-template-columns:5fr 7fr;gap:56px;align-items:center;}
.plan-row.reverse{grid-template-columns:7fr 5fr;}
.plan-row.reverse .plan-media{order:2;}
.plan-media img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-lg);border:1px solid var(--line-light);box-shadow:var(--sh-1);}
.plan-text h3{font-size:clamp(22px,2.2vw,30px);font-weight:700;line-height:1.25;}
.plan-text > p{margin-top:16px;font-size:15.5px;line-height:1.85;color:var(--t-on-light-muted);}
.plan-points{margin-top:26px;border-top:1px solid var(--line-light);}
.plan-points li{display:flex;gap:14px;padding:16px 0;border-bottom:1px solid var(--line-light);font-size:15px;line-height:1.7;}
.plan-points li strong{font-weight:600;min-width:5.5em;}
.plan-points li span{color:var(--t-on-light-muted);}
.plan-gap{margin-top:88px;}

/* FAQ */
.faq-wrap{max-width:820px;margin:0 auto;}
.accordion-item{background:transparent;border:0;border-top:1px solid var(--line-light);border-radius:0;}
.accordion-item:last-child{border-bottom:1px solid var(--line-light);}
.accordion-button{background:transparent;box-shadow:none;padding:24px 44px 24px 0;font-size:17.5px;font-weight:600;color:var(--t-on-light);
  border-radius:0;position:relative;}
.accordion-button:not(.collapsed){color:var(--brand);background:transparent;box-shadow:none;}
.accordion-button::after{display:none;}
.accordion-button::before,.accordion-button::after{content:"";}
.faq-plus{position:absolute;right:8px;top:50%;width:16px;height:16px;margin-top:-8px;pointer-events:none;}
.faq-plus::before,.faq-plus::after{content:"";position:absolute;background:var(--t-on-light-muted);transition:transform .28s var(--ease),background .28s var(--ease);}
.faq-plus::before{left:0;top:7.2px;width:16px;height:1.6px;}
.faq-plus::after{top:0;left:7.2px;height:16px;width:1.6px;}
.accordion-button:not(.collapsed) + .faq-plus::before,
.accordion-button:not(.collapsed) ~ .faq-plus::before{background:var(--brand);}
.accordion-button:not(.collapsed) ~ .faq-plus::after{transform:rotate(90deg);background:var(--brand);}
.accordion-body{padding:0 44px 26px 0;font-size:15px;line-height:1.9;color:var(--t-on-light-muted);}

/* CTA 表单 */
.cta{background:var(--ink);padding:96px 0;position:relative;overflow:hidden;}
.cta::before{content:"";position:absolute;inset:0;background:url(/assets/images/backpic/back-2.png) center/cover no-repeat;opacity:.16;}
.cta-inner{position:relative;z-index:2;display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:start;}
.cta h2{font-size:clamp(28px,3.2vw,42px);color:#fff;line-height:1.2;}
.cta-copy{margin-top:18px;font-size:15.5px;line-height:1.9;color:var(--t-on-dark-muted);max-width:36em;}
.cta-list{margin-top:26px;display:flex;flex-direction:column;gap:12px;font-size:14.5px;color:rgba(243,241,249,.75);}
.cta-list span{display:inline-flex;align-items:center;gap:10px;}
.cta-list span::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent);}
.cta-form{background:rgba(21,18,31,.72);border:1px solid var(--line-dark);border-radius:var(--r-lg);padding:34px 32px;}
.field{margin-bottom:26px;}
.field label{display:block;font-size:13px;letter-spacing:.1em;color:var(--t-on-dark-muted);margin-bottom:8px;}
.field input,.field textarea{width:100%;background:transparent;border:0;border-bottom:1px solid rgba(255,255,255,.2);
  padding:10px 2px;color:#fff;font-size:15px;outline:none;transition:border-color .24s var(--ease);resize:vertical;}
.field input:focus,.field textarea:focus{border-bottom-color:var(--accent);}
.field input::placeholder,.field textarea::placeholder{color:rgba(243,241,249,.35);}
.cta-form .btn-solid{width:100%;padding:14px;margin-top:6px;}
.form-tip{margin-top:14px;font-size:12.5px;letter-spacing:.02em;color:rgba(243,241,249,.45);min-height:20px;}

/* Footer */
.site-footer{background:var(--ink);color:var(--t-on-dark-muted);padding:72px 0 28px;border-top:1px solid var(--line-dark);}
.ft-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:44px;border-bottom:1px solid var(--line-dark);}
.ft-brand .logo-text{font-size:18px;}
.ft-brand p{margin-top:18px;font-size:14px;line-height:1.85;max-width:30em;}
.ft-domain{margin-top:14px;font-family:"Space Grotesk",Inter,ui-monospace,monospace;font-size:13.5px;color:rgba(243,241,249,.55);letter-spacing:.04em;}
.ft-col h3{font-size:14px;font-weight:600;color:#fff;letter-spacing:.06em;margin-bottom:18px;}
.ft-col a{display:block;font-size:14px;padding:6px 0;color:var(--t-on-dark-muted);}
.ft-col a:hover{color:var(--accent);}
.ft-bottom{display:flex;align-items:center;justify-content:space-between;gap:20px;padding-top:24px;font-size:13px;flex-wrap:wrap;}
.to-top{display:inline-flex;align-items:center;gap:8px;font-size:13.5px;color:var(--t-on-dark);}
.to-top:hover{color:var(--accent);}

/* 动效 */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .45s var(--ease),transform .45s var(--ease);}
.reveal.is-in{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none;}
  html{scroll-behavior:auto;}
  .btn:hover,.rail-card:hover,.news-card:hover{transform:none;}
}

/* 响应式 */
@media(max-width:1199px){
  .hd-search{width:190px;}
  .hd-nav{gap:20px;}
}
@media(max-width:991px){
  .hd-nav,.hd-search,.hd-login,.hd-right .btn{display:none;}
  .nav-toggle{display:block;}
  .hero{padding:126px 0 76px;}
  .hero-inner{grid-template-columns:1fr;gap:40px;}
  .svc-grid{grid-template-columns:1fr;}
  .plan-row,.plan-row.reverse{grid-template-columns:1fr;gap:30px;}
  .plan-row.reverse .plan-media{order:0;}
  .stats-grid{grid-template-columns:1fr 1fr;}
  .rail-card{flex:0 0 calc((100% - 24px)/2);}
  .cta-inner{grid-template-columns:1fr;gap:40px;}
  .ft-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .section{padding:76px 0;}
}
@media(max-width:767px){
  body{font-size:15.5px;}
  .hero h1{font-size:40px;}
  .hero-card{padding:22px;}
  .hero-card-grid{grid-template-columns:1fr 1fr;}
  .sec-head{flex-direction:column;align-items:flex-start;gap:16px;margin-bottom:32px;}
  .rail-card{flex:0 0 84%;}
  .stats-grid{grid-template-columns:1fr 1fr;gap:16px;}
  .stat-item{padding:20px 16px;}
  .svc-item{grid-template-columns:auto 1fr;gap:14px;}
  .svc-item .go{display:none;}
  .section{padding:58px 0;}
  .section-tight{padding:56px 0;}
  .cta{padding:64px 0;}
  .cta-form{padding:26px 20px;}
  .ft-grid{grid-template-columns:1fr;}
  .ft-bottom{flex-direction:column;align-items:flex-start;}
  .plan-gap{margin-top:56px;}
  .accordion-button{font-size:16px;padding:20px 36px 20px 0;}
  .accordion-body{padding:0 36px 22px 0;}
}

/* roulang page: article */
:root{
  --brand:#6D4DF6;
  --brand-deep:#4A2FD1;
  --accent:#35E0C4;
  --pink:#FF6FA5;
  --gold:#E5C172;
  --ink:#0C0A14;
  --panel:#15121F;
  --panel-2:#1C1829;
  --moon:#F4F2F8;
  --white:#FFFFFF;
  --t-dark:#F3F1F9;
  --t-dark-2:#9C96B0;
  --t-light:#12101A;
  --t-light-2:#5B5670;
  --line-dark:rgba(255,255,255,.08);
  --line-light:rgba(18,16,26,.10);
  --r-sm:10px;
  --r:14px;
  --r-lg:18px;
  --r-pill:999px;
  --sh-1:0 2px 8px rgba(12,10,20,.06);
  --sh-2:0 18px 48px rgba(12,10,20,.14);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font:"HarmonyOS Sans SC","Source Han Sans SC","Noto Sans SC","PingFang SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"Space Grotesk","Inter",ui-sans-serif,system-ui,sans-serif;
  --bs-primary:#6D4DF6;
  --bs-body-bg:#F4F2F8;
  --bs-body-color:#12101A;
  --bs-border-radius:14px;
  --bs-font-sans-serif:"HarmonyOS Sans SC","Source Han Sans SC","Noto Sans SC","PingFang SC",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  color:var(--t-light);
  background:var(--moon);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button,input,textarea,select{font:inherit;color:inherit;}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px;}
.container,.container-fluid{width:100%;max-width:1200px;margin:0 auto;padding-left:24px;padding-right:24px;}
@media(min-width:1400px){.container{max-width:1280px;}}

/* ---------- 通用按钮 / 标签 ---------- */
.btn-rl{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:11px 24px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;letter-spacing:.01em;border:1px solid transparent;
  cursor:pointer;transition:background-color .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),transform .22s var(--ease);
  white-space:nowrap;
}
.btn-solid{background:var(--brand);color:#fff;box-shadow:0 8px 24px rgba(109,77,246,.28);}
.btn-solid:hover,.btn-solid:focus-visible{background:var(--accent);color:var(--ink);box-shadow:0 10px 26px rgba(53,224,196,.28);}
.btn-ghost{background:transparent;border-color:rgba(255,255,255,.24);color:var(--t-dark);}
.btn-ghost:hover,.btn-ghost:focus-visible{border-color:var(--brand);background:rgba(109,77,246,.12);color:#fff;}
.btn-ghost-dark{background:transparent;border-color:var(--line-light);color:var(--t-light);}
.btn-ghost-dark:hover,.btn-ghost-dark:focus-visible{border-color:var(--brand);background:rgba(109,77,246,.08);}
.tag{
  display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 12px;border-radius:var(--r-pill);
  font-size:12px;letter-spacing:.14em;font-weight:600;
  background:rgba(109,77,246,.10);color:var(--brand-deep);
}
.tag::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--pink);}
.tag-dark{background:rgba(53,224,196,.12);color:var(--accent);}
.tag-dark::before{background:var(--accent);}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand-deep);position:relative;}
.link-arrow::after{content:"";position:absolute;left:0;bottom:-3px;height:1px;width:0;background:var(--accent);transition:width .24s var(--ease);}
.link-arrow:hover::after{width:100%;}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:200;
  background:rgba(12,10,20,.72);
  border-bottom:1px solid var(--line-dark);
  backface-visibility:hidden;
  transition:background-color .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease);
}
.site-header.is-stuck{background:rgba(12,10,20,.94);box-shadow:0 10px 30px rgba(12,10,20,.35);}
.hd-inner{display:flex;align-items:center;gap:22px;height:74px;}
.brand{display:flex;align-items:center;gap:10px;flex:none;}
.brand-mark{position:relative;width:26px;height:26px;flex:none;}
.brand-mark i{position:absolute;border-radius:50%;}
.brand-mark i:nth-child(1){width:8px;height:8px;top:1px;left:0;background:var(--accent);}
.brand-mark i:nth-child(2){width:6px;height:6px;top:11px;right:1px;background:var(--brand);box-shadow:0 0 0 3px rgba(109,77,246,.18);}
.brand-mark i:nth-child(3){width:5px;height:5px;bottom:0;left:8px;background:var(--gold);}
.logo-text{font-size:18px;font-weight:800;letter-spacing:-.01em;color:var(--t-dark);}
.logo-text em{font-style:normal;color:var(--accent);font-weight:700;margin-left:2px;}
.hd-nav{display:flex;align-items:center;gap:6px;margin-left:6px;}
.hd-nav a{
  position:relative;display:inline-flex;align-items:center;gap:6px;height:74px;padding:0 14px;
  font-size:15px;color:var(--t-dark-2);transition:color .2s var(--ease);
}
.hd-nav a:hover{color:var(--t-dark);}
.hd-nav a.active{color:var(--t-dark);font-weight:600;}
.hd-nav a.active::after{content:"";position:absolute;left:14px;right:14px;bottom:0;height:2px;background:var(--accent);border-radius:2px;}
.hd-actions{display:flex;align-items:center;gap:12px;margin-left:auto;}
.hd-search{position:relative;}
.hd-search input{
  width:220px;height:40px;padding:0 16px;border-radius:var(--r-pill);
  background:rgba(255,255,255,.06);border:1px solid var(--line-dark);color:var(--t-dark);
  font-size:14px;transition:border-color .2s var(--ease),background-color .2s var(--ease);
}
.hd-search input::placeholder{color:#6E6883;}
.hd-search input:focus{outline:none;border-color:var(--brand);background:rgba(109,77,246,.10);}
.link-plain{font-size:14px;color:var(--t-dark-2);transition:color .2s var(--ease);}
.link-plain:hover{color:var(--accent);}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--line-dark);
  background:rgba(255,255,255,.05);align-items:center;justify-content:center;flex-direction:column;gap:4px;cursor:pointer;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--t-dark);border-radius:2px;transition:transform .22s var(--ease),opacity .22s var(--ease);}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}
.hd-drawer{display:none;background:rgba(12,10,20,.98);border-bottom:1px solid var(--line-dark);padding:18px 24px 24px;}
.hd-drawer .drawer-links{display:flex;flex-direction:column;}
.hd-drawer .drawer-links a{padding:14px 0;border-bottom:1px solid var(--line-dark);font-size:16px;color:var(--t-dark);min-height:44px;display:flex;align-items:center;}
.hd-drawer .drawer-links a.active{color:var(--accent);}
.hd-drawer .drawer-search input{width:100%;height:46px;margin:18px 0 14px;padding:0 16px;border-radius:var(--r-pill);background:rgba(255,255,255,.06);border:1px solid var(--line-dark);color:var(--t-dark);}
.hd-drawer .drawer-search input:focus{outline:none;border-color:var(--brand);}
.hd-drawer .drawer-actions{display:flex;flex-direction:column;gap:10px;}
.hd-drawer .drawer-actions .btn-rl{width:100%;}

/* ---------- 文章头部 ---------- */
.art-hero{
  position:relative;overflow:hidden;color:var(--t-dark);
  background:#0C0A14 url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  padding:34px 0 54px;
}
.art-hero::before{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(255,255,255,.14) 1px,transparent 1px);
  background-size:36px 36px;opacity:.28;pointer-events:none;
}
.art-hero::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(12,10,20,.84),rgba(12,10,20,.95));}
.art-hero .container{position:relative;z-index:2;}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--t-dark-2);letter-spacing:.02em;}
.crumbs a{color:var(--t-dark-2);transition:color .2s var(--ease);}
.crumbs a:hover{color:var(--accent);}
.crumbs span.sep{color:#4F4A62;}
.crumbs .current{color:var(--t-dark);}
.art-hero h1{
  margin-top:22px;max-width:900px;
  font-size:clamp(28px,3.9vw,46px);font-weight:800;line-height:1.18;letter-spacing:-.02em;
}
.art-meta{display:flex;flex-wrap:wrap;align-items:center;gap:14px;margin-top:22px;font-size:13px;letter-spacing:.02em;color:var(--t-dark-2);font-family:var(--mono);}
.art-meta li{display:flex;align-items:center;gap:8px;}
.art-meta li+li::before{content:"";width:1px;height:12px;background:rgba(255,255,255,.18);margin-right:6px;}
.art-meta .hl{color:var(--accent);}

/* ---------- 正文区 ---------- */
.art-main{padding:64px 0 88px;background:var(--moon);}
.art-cover{
  max-width:1000px;margin:0 auto 52px;border-radius:var(--r-lg);overflow:hidden;
  border:1px solid var(--line-light);background:var(--panel);box-shadow:var(--sh-1);
}
.art-cover img{width:100%;height:auto;max-height:420px;object-fit:cover;aspect-ratio:16/7;}
.article-body{
  max-width:760px;margin:0 auto;font-size:17px;line-height:1.9;color:#241F35;
  overflow-wrap:break-word;word-break:break-word;
}
.article-body>*:first-child{margin-top:0;}
.article-body h2{
  position:relative;font-size:clamp(22px,2.4vw,30px);font-weight:700;line-height:1.32;
  letter-spacing:-.02em;color:var(--t-light);margin:48px 0 16px;padding-left:16px;
}
.article-body h2::before{content:"";position:absolute;left:0;top:.18em;bottom:.18em;width:3px;border-radius:3px;background:var(--brand);}
.article-body h3{font-size:20px;font-weight:600;line-height:1.4;margin:34px 0 12px;color:var(--t-light);}
.article-body h4{font-size:17px;font-weight:600;margin:26px 0 10px;}
.article-body p{margin:0 0 1.2em;}
.article-body ul,.article-body ol{margin:0 0 1.2em;padding-left:1.4em;}
.article-body ul{list-style:disc;}
.article-body ol{list-style:decimal;}
.article-body li{margin:.4em 0;}
.article-body li::marker{color:var(--brand);}
.article-body blockquote{
  margin:28px 0;padding:18px 24px;background:var(--moon);border-left:3px solid var(--accent);
  border-radius:0 12px 12px 0;color:#3A3550;
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{max-width:100%;height:auto;margin:28px auto;border-radius:12px;}
.article-body figure{margin:28px 0;}
.article-body figcaption{font-size:13px;color:var(--t-light-2);text-align:center;margin-top:10px;}
.article-body a{color:var(--brand-deep);border-bottom:1px solid rgba(109,77,246,.35);transition:color .2s var(--ease),border-color .2s var(--ease);}
.article-body a:hover{color:var(--accent);border-color:var(--accent);}
.article-body hr{border:0;border-top:1px solid var(--line-light);margin:40px 0;}
.article-body table{width:100%;border-collapse:collapse;margin:26px 0;font-size:15px;line-height:1.7;}
.article-body th,.article-body td{border:0;border-bottom:1px solid var(--line-light);padding:12px 10px;text-align:left;vertical-align:top;}
.article-body th{font-weight:600;color:var(--t-light);}
.article-body pre{background:var(--panel);color:#EDEAF7;padding:18px 20px;border-radius:12px;overflow-x:auto;font-size:14px;line-height:1.7;}
.article-body code{font-family:var(--mono);font-size:.92em;background:rgba(109,77,246,.08);padding:2px 6px;border-radius:6px;}
.article-body pre code{background:none;padding:0;}
.art-empty{
  text-align:center;padding:64px 24px;background:var(--white);border:1px solid var(--line-light);
  border-radius:var(--r-lg);box-shadow:var(--sh-1);
}
.art-empty h2{font-size:22px;font-weight:700;color:var(--t-light);margin-bottom:12px;}
.art-empty p{color:var(--t-light-2);margin-bottom:24px;}
.art-tags{
  max-width:760px;margin:56px auto 0;padding-top:26px;border-top:1px solid var(--line-light);
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
}
.art-tags .label{font-size:13px;color:var(--t-light-2);letter-spacing:.08em;margin-right:4px;}

/* ---------- 相关推荐 ---------- */
.related{padding:80px 0;background:var(--white);border-top:1px solid var(--line-light);}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:40px;}
.sec-head h2{font-size:clamp(24px,2.8vw,34px);font-weight:700;letter-spacing:-.02em;color:var(--t-light);}
.sec-head p{font-size:14px;color:var(--t-light-2);margin-top:8px;}
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.post-card{
  display:flex;flex-direction:column;background:var(--white);border:1px solid var(--line-light);
  border-radius:var(--r);overflow:hidden;box-shadow:var(--sh-1);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease),border-color .3s var(--ease);
}
.post-card:hover{transform:translateY(-4px);border-color:rgba(109,77,246,.4);box-shadow:var(--sh-2);}
.post-thumb{aspect-ratio:16/10;overflow:hidden;background:var(--panel);}
.post-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease);}
.post-card:hover .post-thumb img{transform:scale(1.03);}
.post-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:12px;flex:1;}
.post-body h3{font-size:19px;font-weight:600;line-height:1.42;color:var(--t-light);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.post-body p{font-size:14px;line-height:1.8;color:var(--t-light-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.post-foot{display:flex;align-items:center;justify-content:space-between;margin-top:auto;padding-top:14px;border-top:1px solid var(--line-light);font-size:13px;color:var(--t-light-2);font-family:var(--mono);}
.post-foot .read{color:var(--brand-deep);font-weight:600;}
.post-card:hover .post-foot .read{color:var(--brand);}

/* ---------- 返回入口 ---------- */
.back-strip{padding:0 0 80px;background:var(--white);}
.back-inner{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:18px;
  padding:26px 28px;border:1px dashed var(--line-light);border-radius:var(--r-lg);background:var(--moon);
}
.back-inner p{font-size:15px;color:var(--t-light-2);}
.back-inner strong{color:var(--t-light);font-weight:600;}

/* ---------- CTA 联系 ---------- */
.cta{position:relative;background:#0C0A14;color:var(--t-dark);padding:96px 0;overflow:hidden;}
.cta::before{
  content:"";position:absolute;inset:0;
  background:radial-gradient(600px 320px at 12% 10%,rgba(109,77,246,.28),transparent 68%),
             radial-gradient(520px 300px at 92% 88%,rgba(53,224,196,.18),transparent 70%);
  pointer-events:none;
}
.cta .container{position:relative;z-index:1;}
.cta-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start;}
.cta-left h2{font-size:clamp(28px,3.2vw,40px);font-weight:800;line-height:1.18;letter-spacing:-.02em;}
.cta-left p{margin-top:18px;font-size:16px;line-height:1.85;color:var(--t-dark-2);max-width:460px;}
.cta-points{margin-top:30px;display:flex;flex-direction:column;}
.cta-points li{padding:14px 0;border-top:1px solid var(--line-dark);font-size:15px;color:var(--t-dark-2);display:flex;gap:12px;}
.cta-points li:last-child{border-bottom:1px solid var(--line-dark);}
.cta-points span{font-family:var(--mono);color:var(--accent);font-size:13px;letter-spacing:.08em;}
.cta-form{background:rgba(255,255,255,.02);border:1px solid var(--line-dark);border-radius:var(--r-lg);padding:30px 28px 26px;}
.cta-form .field{margin-bottom:26px;}
.cta-form label{display:block;font-size:13px;letter-spacing:.08em;color:var(--t-dark-2);margin-bottom:8px;}
.cta-form input,.cta-form textarea{
  width:100%;background:transparent;border:0;border-bottom:1px solid rgba(255,255,255,.2);
  padding:10px 2px;color:var(--t-dark);font-size:15px;transition:border-color .22s var(--ease);
}
.cta-form textarea{resize:vertical;min-height:76px;line-height:1.7;}
.cta-form input:focus,.cta-form textarea:focus{outline:none;border-bottom-color:var(--accent);}
.cta-form input::placeholder,.cta-form textarea::placeholder{color:#67617A;}
.cta-form .btn-rl{width:100%;margin-top:6px;}
.cta-form .note{margin-top:14px;font-size:12px;letter-spacing:.04em;color:#67617A;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:var(--t-dark-2);padding:72px 0 0;}
.ft-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;}
.ft-brand .logo-text{font-size:20px;}
.ft-brand p{margin-top:16px;font-size:14px;line-height:1.85;color:var(--t-dark-2);max-width:340px;}
.ft-domain{margin-top:14px;font-family:var(--mono);font-size:13px;letter-spacing:.06em;color:#6E6883;}
.ft-col h3{font-size:14px;font-weight:600;letter-spacing:.12em;color:var(--t-dark);margin-bottom:18px;}
.ft-col a{display:block;padding:7px 0;font-size:14px;color:var(--t-dark-2);transition:color .2s var(--ease),transform .2s var(--ease);}
.ft-col a:hover{color:var(--accent);transform:translateX(3px);}
.ft-bottom{
  margin-top:56px;padding:22px 0;border-top:1px solid var(--line-dark);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;
  font-size:13px;color:#6E6883;letter-spacing:.02em;
}
.to-top{color:var(--t-dark-2);transition:color .2s var(--ease);}
.to-top:hover{color:var(--accent);}

/* ---------- 动效 ---------- */
[data-reveal]{opacity:0;transform:translateY(16px);transition:opacity .38s var(--ease),transform .38s var(--ease);}
[data-reveal].is-in{opacity:1;transform:none;}

/* ---------- 响应式 ---------- */
@media(max-width:1199.98px){
  .hd-search input{width:180px;}
  .hd-nav a{padding:0 11px;font-size:14px;}
}
@media(max-width:991.98px){
  .hd-nav,.hd-actions{display:none;}
  .nav-toggle{display:flex;margin-left:auto;}
  .hd-drawer.is-open{display:block;}
  .post-grid{grid-template-columns:repeat(2,1fr);}
  .cta-grid{grid-template-columns:1fr;gap:36px;}
  .ft-grid{grid-template-columns:1fr 1fr;gap:34px;}
  .art-main{padding:48px 0 64px;}
  .related{padding:64px 0;}
  .cta{padding:72px 0;}
}
@media(max-width:767.98px){
  body{font-size:16px;}
  .container{padding-left:16px;padding-right:16px;}
  .art-hero{padding:22px 0 40px;}
  .art-hero h1{margin-top:16px;font-size:clamp(26px,7vw,34px);}
  .art-meta{gap:10px;}
  .art-meta li+li::before{display:none;}
  .article-body{font-size:16px;line-height:1.88;}
  .article-body h2{margin:36px 0 14px;}
  .post-grid{grid-template-columns:1fr;}
  .sec-head{flex-direction:column;align-items:flex-start;gap:10px;}
  .ft-grid{grid-template-columns:1fr;gap:28px;}
  .ft-bottom{flex-direction:column;align-items:flex-start;}
  .back-inner{padding:22px;}
  .cta-form{padding:24px 20px 22px;}
  .art-cover{margin-bottom:34px;}
  .art-cover img{aspect-ratio:16/10;}
}
@media(prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;}
  [data-reveal]{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}

/* roulang page: category1 */
:root{
  --brand:#6D4DF6;
  --brand-deep:#4A2FD1;
  --cyan:#35E0C4;
  --pink:#FF6FA5;
  --gold:#E5C172;
  --ink:#0C0A14;
  --ink-2:#15121F;
  --light:#F4F2F8;
  --white:#FFFFFF;
  --td:#F3F1F9;
  --td2:#9C96B0;
  --tl:#12101A;
  --tl2:#5B5670;
  --line-d:rgba(255,255,255,.08);
  --line-l:rgba(18,16,26,.10);
  --r:14px;
  --r-lg:18px;
  --r-pill:999px;
  --sh-1:0 2px 8px rgba(12,10,20,.06);
  --sh-2:0 18px 48px rgba(12,10,20,.14);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font:"HarmonyOS Sans SC","Source Han Sans SC","Noto Sans SC","PingFang SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"Space Grotesk",Inter,ui-monospace,SFMono-Regular,Menlo,monospace;

  --bs-primary:#6D4DF6;
  --bs-body-bg:#FFFFFF;
  --bs-body-color:#12101A;
  --bs-border-radius:14px;
  --bs-link-color:#6D4DF6;
  --bs-link-hover-color:#4A2FD1;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font);
  font-size:16.5px;
  line-height:1.85;
  color:var(--tl);
  background:var(--white);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none;transition:color .22s var(--ease)}
button,input,textarea{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.02em}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--cyan);outline-offset:2px}
section[id]{scroll-margin-top:96px}

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

/* ---------- 通用按钮 ---------- */
.btn-solid,.btn-line,.btn-quiet{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 24px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;border:1px solid transparent;
  transition:background-colors .22s var(--ease),background-color .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),transform .22s var(--ease);
  cursor:pointer;
}
.btn-solid{background:var(--brand);color:#fff;border-color:var(--brand)}
.btn-solid:hover{background:var(--cyan);border-color:var(--cyan);color:#0C0A14}
.btn-line{border-color:rgba(255,255,255,.24);color:var(--td);background:transparent}
.btn-line:hover{border-color:var(--brand);background:rgba(109,77,246,.14);color:#fff}
.btn-quiet{border-color:rgba(18,16,26,.16);color:var(--tl);background:transparent}
.btn-quiet:hover{border-color:var(--brand);background:rgba(109,77,246,.08);color:var(--brand-deep)}
.btn-solid:active,.btn-line:active,.btn-quiet:active{transform:translateY(1px)}

/* ---------- 导航 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:1000;
  background:rgba(12,10,20,.74);
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  border-bottom:1px solid rgba(255,255,255,.06);
  transition:background-color .28s var(--ease),border-color .28s var(--ease);
}
.site-header.is-stuck{background:rgba(12,10,20,.94);border-bottom-color:var(--line-d)}
.header-inner{display:flex;align-items:center;gap:32px;height:72px}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{display:inline-flex;width:24px;height:24px;align-items:center;justify-content:center}
.brand-mark svg{width:24px;height:24px;display:block}
.logo-text{font-size:17px;font-weight:700;color:var(--td);letter-spacing:.01em;white-space:nowrap}
.logo-text em{font-style:normal;color:var(--cyan)}
.hd-collapse{display:flex;align-items:center;justify-content:space-between;gap:24px;flex:1}
.hd-nav{display:flex;align-items:center;gap:28px}
.hd-nav a{
  position:relative;font-size:15px;color:rgba(243,241,249,.72);
  padding:6px 0;transition:color .22s var(--ease);
}
.hd-nav a::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;
  background:var(--cyan);transition:width .28s var(--ease);
}
.hd-nav a:hover{color:#fff}
.hd-nav a:hover::after{width:100%}
.hd-nav a.active{color:#fff}
.hd-nav a.active::after{width:100%}
.header-actions{display:flex;align-items:center;gap:14px}
.hd-search{position:relative;display:flex;align-items:center}
.hd-search input{
  width:220px;height:38px;border-radius:var(--r-pill);
  border:1px solid rgba(255,255,255,.14);background:rgba(255,255,255,.05);
  color:var(--td);font-size:14px;padding:0 40px 0 16px;
  transition:border-color .22s var(--ease),box-shadow .22s var(--ease),background-color .22s var(--ease);
}
.hd-search input::placeholder{color:rgba(156,150,176,.9)}
.hd-search input:focus{
  outline:none;border-color:var(--brand);background:rgba(255,255,255,.08);
  box-shadow:0 0 0 3px rgba(109,77,246,.28);
}
.hd-search button{
  position:absolute;right:6px;top:50%;transform:translateY(-50%);
  width:30px;height:30px;border:0;border-radius:50%;background:transparent;
  display:inline-flex;align-items:center;justify-content:center;cursor:pointer;
}
.hd-search button svg{width:15px;height:15px;stroke:var(--td2);fill:none;stroke-width:1.8}
.hd-search button:hover svg{stroke:var(--cyan)}
.hd-login{font-size:15px;color:rgba(243,241,249,.78);padding:8px 4px}
.hd-login:hover{color:var(--cyan)}
.hd-toggle{
  display:none;width:44px;height:44px;border:1px solid rgba(255,255,255,.18);
  border-radius:12px;background:transparent;cursor:pointer;
  flex-direction:column;align-items:center;justify-content:center;gap:5px;
}
.hd-toggle span{display:block;width:18px;height:2px;background:var(--td);transition:transform .26s var(--ease),opacity .26s var(--ease)}
.hd-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.hd-toggle.is-open span:nth-child(2){opacity:0}
.hd-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- 分类页 Hero ---------- */
.hero-cat{
  position:relative;overflow:hidden;color:var(--td);
  padding:152px 0 88px;
  background-color:var(--ink);
  background-image:url("/assets/images/backpic/back-1.png");
  background-size:cover;background-position:center;
}
.hero-cat::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(135deg,rgba(12,10,20,.94) 0%,rgba(12,10,20,.84) 46%,rgba(21,18,31,.78) 100%);
}
.hero-cat::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.55;
  background-image:radial-gradient(circle,rgba(255,255,255,.12) 1px,transparent 1px);
  background-size:28px 28px;
}
.hero-cat .container{position:relative;z-index:2}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--td2);margin-bottom:26px}
.breadcrumb a{color:var(--td2)}
.breadcrumb a:hover{color:var(--cyan)}
.breadcrumb .sep{color:rgba(156,150,176,.6)}
.breadcrumb .now{color:var(--td)}
.hero-title{
  font-size:clamp(32px,4.8vw,58px);line-height:1.12;font-weight:800;
  letter-spacing:-.03em;color:#fff;max-width:16em;
}
.hero-title .hl{color:var(--cyan)}
.hero-lead{margin-top:22px;font-size:17.5px;line-height:1.85;color:rgba(243,241,249,.78);max-width:44em}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px}
.hero-meta{
  margin-top:30px;display:flex;flex-wrap:wrap;gap:26px;
  font-size:13px;letter-spacing:.06em;color:var(--td2);font-family:var(--mono);
}
.hero-meta span{display:inline-flex;align-items:center;gap:8px}
.hero-meta span::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--pink);opacity:.85}

/* ---------- 板块通用 ---------- */
.sec{padding:112px 0}
.sec-tight{padding:88px 0}
.sec-light{background:var(--light)}
.sec-white{background:var(--white)}
.sec-dark{background:var(--ink);color:var(--td)}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:28px;margin-bottom:52px}
.sec-eyebrow{
  display:block;font-family:var(--mono);font-size:12px;letter-spacing:.2em;
  color:var(--tl2);margin-bottom:14px;
}
.sec-dark .sec-eyebrow{color:var(--td2)}
.sec-title{
  position:relative;padding-left:20px;
  font-size:clamp(28px,3.4vw,42px);line-height:1.18;font-weight:700;color:inherit;
}
.sec-title::before{
  content:"";position:absolute;left:0;top:.2em;bottom:.2em;width:3px;
  background:var(--brand);border-radius:2px;
}
.sec-dark .sec-title::before{background:var(--cyan)}
.sec-sub{margin-top:16px;color:var(--tl2);font-size:16px;line-height:1.85;max-width:52em}
.sec-dark .sec-sub{color:var(--td2)}
.more-link{
  position:relative;font-size:15px;font-weight:600;color:var(--brand);white-space:nowrap;
  padding-bottom:4px;
}
.more-link::after{
  content:"";position:absolute;left:0;bottom:0;height:1px;width:0;
  background:var(--cyan);transition:width .3s var(--ease);
}
.more-link:hover::after{width:100%}
.sec-dark .more-link{color:var(--cyan)}

/* ---------- 目录卡 ---------- */
.dir-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.dir-card{
  display:flex;flex-direction:column;
  padding:34px 30px 30px;background:var(--white);
  border:1px solid var(--line-l);border-radius:var(--r-lg);box-shadow:var(--sh-1);
  transition:transform .28s var(--ease),box-shadow .28s var(--ease),border-color .28s var(--ease);
}
.dir-card:hover{transform:translateY(-4px);border-color:rgba(109,77,246,.4);box-shadow:var(--sh-2)}
.dir-num{font-family:var(--mono);font-size:13px;letter-spacing:.18em;color:var(--brand)}
.dir-card h3{font-size:21px;line-height:1.4;font-weight:600;margin:16px 0 12px}
.dir-card p{color:var(--tl2);font-size:15.5px;line-height:1.8}
.dir-arrow{
  display:inline-flex;align-items:center;gap:8px;margin-top:26px;
  font-size:14px;font-weight:600;color:var(--brand);
}
.dir-arrow i{
  display:inline-block;width:14px;height:1px;background:var(--brand);position:relative;
  transition:transform .26s var(--ease);
}
.dir-arrow i::after{
  content:"";position:absolute;right:0;top:-3px;width:7px;height:7px;
  border-top:1px solid var(--brand);border-right:1px solid var(--brand);
  transform:rotate(45deg);
}
.dir-card:hover .dir-arrow i{transform:translateX(6px)}

/* ---------- 数据带 ---------- */
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.stat{
  padding:8px 28px;border-left:1px solid var(--line-d);
}
.stat:first-child{border-left:0;padding-left:0}
.stat b{
  display:block;font-family:var(--mono);font-weight:700;
  font-size:clamp(34px,4vw,54px);line-height:1.1;color:#fff;letter-spacing:-.02em;
}
.stat b em{font-style:normal;color:var(--cyan)}
.stat span{display:block;margin-top:12px;font-size:13.5px;color:var(--td2);letter-spacing:.04em}

/* ---------- 图文分栏 ---------- */
.split{display:grid;grid-template-columns:5fr 7fr;gap:60px;align-items:center}
.split-media{position:relative}
.split-media img{
  width:100%;aspect-ratio:4/3;object-fit:cover;
  border-radius:var(--r-lg);border:1px solid var(--line-l);
}
.split-media::after{
  content:"";position:absolute;inset:auto -14px -14px auto;width:110px;height:110px;
  border-radius:22px;border:1px solid rgba(109,77,246,.28);z-index:-1;
}
.fact-list{border-top:1px solid var(--line-l)}
.fact{
  display:grid;grid-template-columns:56px 1fr;gap:18px;
  padding:24px 0;border-bottom:1px solid var(--line-l);
}
.fact-num{font-family:var(--mono);font-size:13px;letter-spacing:.14em;color:var(--cyan);padding-top:6px}
.fact h3{font-size:19px;font-weight:600;line-height:1.45;margin-bottom:8px}
.fact p{font-size:15.5px;color:var(--tl2);line-height:1.82}

/* ---------- 场景卡 ---------- */
.scene-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.scene-card{
  background:var(--white);border:1px solid var(--line-l);border-radius:var(--r-lg);
  padding:32px 28px;box-shadow:var(--sh-1);
  transition:transform .28s var(--ease),box-shadow .28s var(--ease),border-color .28s var(--ease);
}
.scene-card:hover{transform:translateY(-4px);border-color:rgba(109,77,246,.4);box-shadow:var(--sh-2)}
.scene-ico{
  width:44px;height:44px;border-radius:12px;display:inline-flex;align-items:center;justify-content:center;
  background:rgba(109,77,246,.1);border:1px solid rgba(109,77,246,.22);
}
.scene-ico svg{width:22px;height:22px;fill:none;stroke:var(--brand);stroke-width:1.6}
.scene-card h3{font-size:20px;font-weight:600;margin:20px 0 10px;line-height:1.4}
.scene-card p{font-size:15.5px;color:var(--tl2);line-height:1.82}

/* ---------- 步骤 ---------- */
.steps{position:relative;max-width:820px;margin:0 auto;padding-left:44px}
.steps::before{content:"";position:absolute;left:15px;top:8px;bottom:8px;width:1px;background:var(--line-l)}
.step{position:relative;padding-bottom:42px}
.step:last-child{padding-bottom:0}
.step::before{
  content:"";position:absolute;left:-35px;top:8px;width:12px;height:12px;border-radius:50%;
  background:var(--brand);box-shadow:0 0 0 5px rgba(109,77,246,.13);
}
.step-num{font-family:var(--mono);font-size:13px;letter-spacing:.16em;color:var(--tl2)}
.step h3{font-size:20px;font-weight:600;margin:8px 0 8px;line-height:1.45}
.step p{font-size:15.5px;color:var(--tl2);line-height:1.82}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:820px;margin:0 auto}
.faq-acc .accordion-item{background:transparent;border:0;border-top:1px solid var(--line-l);border-radius:0}
.faq-acc .accordion-item:last-child{border-bottom:1px solid var(--line-l)}
.faq-acc .accordion-header{margin:0}
.faq-acc .accordion-button{
  background:transparent;border:0;border-radius:0;box-shadow:none;
  padding:24px 44px 24px 0;font-size:18px;font-weight:600;color:var(--tl);
  line-height:1.5;letter-spacing:-.01em;
}
.faq-acc .accordion-button:not(.collapsed){color:var(--brand);background:transparent;box-shadow:none}
.faq-acc .accordion-button:focus{box-shadow:none;outline:2px solid var(--cyan);outline-offset:2px}
.faq-acc .accordion-button::after{
  content:"";width:16px;height:16px;margin-left:auto;flex:0 0 16px;
  background:
    linear-gradient(var(--brand),var(--brand)) center/16px 2px no-repeat,
    linear-gradient(var(--brand),var(--brand)) center/2px 16px no-repeat;
  transition:transform .3s var(--ease);
}
.faq-acc .accordion-button:not(.collapsed)::after{transform:rotate(135deg)}
.faq-acc .accordion-body{padding:0 44px 26px 0;color:var(--tl2);font-size:15.5px;line-height:1.9}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;background:var(--ink);color:var(--td);overflow:hidden;
  padding:104px 0;
}
.cta-band::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:radial-gradient(circle,rgba(255,255,255,.1) 1px,transparent 1px);
  background-size:30px 30px;
}
.cta-band .container{position:relative;z-index:2}
.cta-inner{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:start}
.cta-left h2{font-size:clamp(28px,3.4vw,40px);line-height:1.2;color:#fff;margin-bottom:20px}
.cta-left p{color:var(--td2);font-size:16px;line-height:1.85;max-width:30em}
.cta-points{margin-top:32px;border-top:1px solid var(--line-d)}
.cta-points li{
  display:flex;align-items:center;gap:12px;padding:16px 0;
  border-bottom:1px solid var(--line-d);font-size:15px;color:var(--td);
}
.cta-points li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--cyan);flex:0 0 6px}
.cta-form{background:var(--ink-2);border:1px solid var(--line-d);border-radius:var(--r-lg);padding:36px 32px}
.field{display:block;margin-bottom:26px}
.field span{display:block;font-size:13px;letter-spacing:.08em;color:var(--td2);margin-bottom:8px}
.field input,.field textarea{
  width:100%;background:transparent;border:0;border-bottom:1px solid rgba(255,255,255,.18);
  color:var(--td);padding:10px 2px;font-size:16px;border-radius:0;
  transition:border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.field textarea{resize:vertical;min-height:88px;line-height:1.7}
.field input:focus,.field textarea:focus{
  outline:none;border-bottom-color:var(--cyan);box-shadow:0 1px 0 0 var(--cyan);
}
.form-note{margin-top:16px;font-size:12.5px;color:var(--td2);letter-spacing:.03em}
.cta-form .btn-solid{width:100%}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:var(--td2);padding:76px 0 28px;border-top:1px solid var(--line-d)}
.ft-grid{
  display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:40px;
  padding-bottom:44px;border-bottom:1px solid var(--line-d);
}
.ft-brand .logo-text{font-size:18px;font-weight:700;color:#fff}
.ft-brand p{margin-top:18px;font-size:14.5px;line-height:1.85;max-width:340px}
.ft-domain{margin-top:14px;font-family:var(--mono);font-size:13px;letter-spacing:.08em;color:#6C6780}
.ft-col h3{font-size:14px;font-weight:600;color:#fff;margin-bottom:16px;letter-spacing:.06em}
.ft-col a{display:block;font-size:14.5px;color:var(--td2);padding:6px 0}
.ft-col a:hover{color:var(--cyan)}
.ft-bottom{
  display:flex;flex-wrap:wrap;gap:14px;justify-content:space-between;align-items:center;
  padding-top:24px;font-size:13.5px;color:#6C6780;
}
.to-top{color:var(--td2)}
.to-top:hover{color:var(--cyan)}

/* ---------- 动效 ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .38s var(--ease),transform .38s var(--ease)}
.reveal.in{opacity:1;transform:none}
.dir-grid>.reveal:nth-child(2),.scene-grid>.reveal:nth-child(2),.stats-grid>.reveal:nth-child(2){transition-delay:.06s}
.dir-grid>.reveal:nth-child(3),.scene-grid>.reveal:nth-child(3),.stats-grid>.reveal:nth-child(3){transition-delay:.12s}
.stats-grid>.reveal:nth-child(4){transition-delay:.18s}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  *{animation-duration:.001ms!important;transition-duration:.001ms!important}
}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .hd-search input{width:180px}
  .hd-nav{gap:20px}
  .split{gap:44px}
}
@media (max-width:991px){
  .hd-toggle{display:inline-flex}
  .header-inner{height:68px;justify-content:space-between}
  .hd-collapse{
    position:fixed;top:68px;left:0;right:0;z-index:999;
    display:flex;flex-direction:column;align-items:stretch;justify-content:flex-start;gap:0;
    background:rgba(12,10,20,.98);border-bottom:1px solid var(--line-d);
    padding:14px 24px 30px;max-height:calc(100vh - 68px);overflow-y:auto;
    transform:translateY(-12px);opacity:0;visibility:hidden;
    transition:opacity .26s var(--ease),transform .26s var(--ease),visibility .26s;
  }
  .hd-collapse.open{transform:none;opacity:1;visibility:visible}
  .hd-nav{flex-direction:column;align-items:stretch;gap:0}
  .hd-nav a{padding:15px 0;font-size:16px;border-bottom:1px solid var(--line-d)}
  .hd-nav a::after{display:none}
  .hd-nav a.active{color:var(--cyan)}
  .header-actions{flex-direction:column;align-items:stretch;gap:12px;margin-top:24px}
  .hd-search{width:100%}
  .hd-search input{width:100%}
  .header-actions .btn-solid,.header-actions .btn-line{width:100%}
  .hd-login{padding:10px 0;text-align:center}
  .hero-cat{padding:126px 0 72px}
  .sec{padding:80px 0}
  .sec-tight{padding:66px 0}
  .dir-grid,.scene-grid{grid-template-columns:repeat(2,1fr)}
  .split{grid-template-columns:1fr;gap:36px}
  .split-media::after{display:none}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:32px 0}
  .stat:nth-child(odd){border-left:0;padding-left:0}
  .cta-inner{grid-template-columns:1fr;gap:40px}
  .ft-grid{grid-template-columns:1fr 1fr;gap:34px}
}
@media (max-width:767px){
  body{font-size:16px}
  .container{padding:0 18px}
  .hero-cat{padding:112px 0 60px}
  .hero-title{font-size:clamp(30px,8vw,40px)}
  .hero-lead{font-size:16px}
  .hero-actions{gap:10px}
  .hero-actions .btn-solid,.hero-actions .btn-line{width:100%}
  .hero-meta{gap:16px;font-size:12.5px}
  .sec{padding:64px 0}
  .sec-tight{padding:56px 0}
  .sec-head{flex-direction:column;align-items:flex-start;gap:14px;margin-bottom:34px}
  .dir-grid,.scene-grid{grid-template-columns:1fr}
  .dir-card,.scene-card{padding:26px 22px}
  .stats-grid{grid-template-columns:1fr;gap:26px}
  .stat{padding:0;border-left:0;border-top:1px solid var(--line-d);padding-top:22px}
  .stat:first-child{border-top:0;padding-top:0}
  .fact{grid-template-columns:1fr;gap:6px}
  .fact-num{padding-top:0}
  .steps{padding-left:34px}
  .steps::before{left:11px}
  .step::before{left:-29px;width:10px;height:10px}
  .faq-acc .accordion-button{font-size:16.5px;padding:20px 38px 20px 0}
  .faq-acc .accordion-body{padding:0 30px 22px 0}
  .cta-band{padding:68px 0}
  .cta-form{padding:26px 20px}
  .ft-grid{grid-template-columns:1fr;gap:30px}
  .ft-brand p{max-width:none}
  .ft-bottom{flex-direction:column;align-items:flex-start}
}

/* roulang page: category3 */
:root{
  --brand:#6D4DF6;
  --brand-deep:#4A2FD1;
  --cyan:#35E0C4;
  --pink:#FF6FA5;
  --gold:#E5C172;
  --ink:#0C0A14;
  --panel:#15121F;
  --moon:#F4F2F8;
  --white:#FFFFFF;
  --t-dark:#F3F1F9;
  --t-dark-dim:#9C96B0;
  --t-light:#12101A;
  --t-light-dim:#5B5670;
  --line-dark:rgba(255,255,255,.08);
  --line-light:rgba(18,16,26,.10);
  --sh1:0 2px 8px rgba(12,10,20,.06);
  --sh2:0 18px 48px rgba(12,10,20,.14);
  --r:14px;
  --r-lg:18px;
  --gutter:26px;
  --bs-primary:#6D4DF6;
  --bs-body-bg:#FFFFFF;
  --bs-body-color:#12101A;
  --bs-border-radius:14px;
  --bs-font-sans-serif:"HarmonyOS Sans SC","Source Han Sans SC","Noto Sans SC","PingFang SC",system-ui,-apple-system,sans-serif;
  --bs-link-color:#4A2FD1;
  --bs-link-hover-color:#6D4DF6;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:"HarmonyOS Sans SC","Source Han Sans SC","Noto Sans SC","PingFang SC",system-ui,-apple-system,sans-serif;
  font-size:17px;
  line-height:1.85;
  color:var(--t-light);
  background:var(--white);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .22s cubic-bezier(.2,.7,.3,1)}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{outline:2px solid var(--cyan);outline-offset:2px;border-radius:6px}
h1,h2,h3,h4{margin:0;font-weight:700;color:inherit}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
@media (min-width:1400px){.container{max-width:1280px}}
.num{font-family:"Inter","Space Grotesk",ui-monospace,SFMono-Regular,Menlo,monospace;font-variant-numeric:tabular-nums}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(12,10,20,.9);
  border-bottom:1px solid transparent;
  transition:background .28s ease,box-shadow .28s ease,border-color .28s ease;
}
.site-header.scrolled{
  background:rgba(12,10,20,.94);
  border-bottom-color:var(--line-dark);
  box-shadow:0 12px 32px rgba(12,10,20,.35);
}
.hd-inner{display:flex;align-items:center;gap:28px;height:76px}
.hd-logo{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.logo-mark{width:26px;height:26px;position:relative;flex:0 0 auto}
.logo-mark i{position:absolute;border-radius:50%;background:var(--cyan);display:block}
.logo-mark i:nth-child(1){width:7px;height:7px;left:9px;top:0}
.logo-mark i:nth-child(2){width:5px;height:5px;left:0;top:14px;background:var(--brand)}
.logo-mark i:nth-child(3){width:5px;height:5px;right:0;top:14px;background:var(--pink)}
.logo-mark i:nth-child(4){width:4px;height:4px;left:11px;bottom:0;background:var(--gold)}
.logo-text{color:var(--t-dark);font-size:20px;font-weight:800;letter-spacing:-.02em}
.logo-text em{font-style:normal;color:var(--cyan);font-weight:700;margin-left:4px}
.hd-nav{display:flex;align-items:center;gap:6px;flex:1 1 auto}
.hd-nav a{
  position:relative;display:inline-flex;align-items:center;height:40px;padding:0 14px;
  color:var(--t-dark-dim);font-size:15px;border-radius:8px;
}
.hd-nav a:hover{color:var(--t-dark);background:rgba(255,255,255,.05)}
.hd-nav a::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;
  background:var(--cyan);transform:scaleX(0);transform-origin:left;
  transition:transform .24s cubic-bezier(.2,.7,.3,1);
}
.hd-nav a:hover::after{transform:scaleX(1)}
.hd-nav a.active{color:var(--t-dark);font-weight:600}
.hd-nav a.active::before{
  content:"";position:absolute;left:4px;top:17px;width:6px;height:6px;border-radius:50%;background:var(--cyan);
}
.hd-nav a.active::after{transform:scaleX(1)}
.hd-right{display:flex;align-items:center;gap:14px;flex:0 0 auto}
.hd-search{position:relative;width:220px}
.hd-search input{
  width:100%;height:40px;border-radius:999px;border:1px solid var(--line-dark);
  background:rgba(255,255,255,.05);color:var(--t-dark);font-size:14px;padding:0 40px 0 16px;
  transition:border-color .22s ease,background .22s ease;
}
.hd-search input::placeholder{color:var(--t-dark-dim)}
.hd-search input:focus{border-color:var(--brand);background:rgba(255,255,255,.08);outline:none}
.hd-search svg{position:absolute;right:15px;top:50%;transform:translateY(-50%);width:16px;height:16px;stroke:var(--t-dark-dim)}
.hd-link{color:var(--t-dark-dim);font-size:15px}
.hd-link:hover{color:var(--cyan)}
.btn-ghost-dark{
  display:inline-flex;align-items:center;justify-content:center;height:40px;padding:0 18px;
  border:1px solid rgba(255,255,255,.22);border-radius:999px;color:var(--t-dark);font-size:15px;
  transition:border-color .24s ease,background .24s ease,color .24s ease;
}
.btn-ghost-dark:hover{border-color:var(--brand);background:rgba(109,77,246,.14);color:var(--t-dark)}
.btn-primary-dark{
  display:inline-flex;align-items:center;justify-content:center;height:40px;padding:0 20px;
  border:1px solid var(--brand);background:var(--brand);color:#fff;font-size:15px;font-weight:600;border-radius:999px;
  transition:background .22s ease,color .22s ease,border-color .22s ease;
}
.btn-primary-dark:hover{background:var(--cyan);border-color:var(--cyan);color:#0C0A14}
.hd-burger{
  display:none;width:44px;height:44px;border:1px solid var(--line-dark);border-radius:12px;
  background:transparent;align-items:center;justify-content:center;flex-direction:column;gap:4px;cursor:pointer;
}
.hd-burger span{display:block;width:18px;height:2px;background:var(--t-dark);border-radius:2px}
.drawer{
  display:none;background:rgba(12,10,20,.98);border-bottom:1px solid var(--line-dark);
  padding:18px 24px 26px;
}
.drawer.open{display:block}
.drawer nav{display:flex;flex-direction:column;gap:4px;margin-bottom:16px}
.drawer nav a{padding:13px 12px;border-radius:10px;color:var(--t-dark-dim);font-size:16px;min-height:44px;display:flex;align-items:center}
.drawer nav a.active{color:var(--t-dark);background:rgba(109,77,246,.16)}
.drawer .hd-search{width:100%;margin-bottom:14px}
.drawer .drawer-actions{display:flex;flex-direction:column;gap:10px}
.drawer .drawer-actions a{width:100%;min-height:44px}

/* ---------- 内页 banner ---------- */
.page-banner{
  position:relative;background:var(--ink);color:var(--t-dark);
  padding:82px 0 74px;overflow:hidden;
}
.page-banner::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;opacity:.34;
}
.page-banner::after{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(255,255,255,.5) 1px,transparent 1px);
  background-size:52px 52px;opacity:.07;
}
.page-banner .container{position:relative;z-index:2}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--t-dark-dim);letter-spacing:.02em;margin-bottom:22px}
.crumb a{color:var(--t-dark-dim)}
.crumb a:hover{color:var(--cyan)}
.crumb span.sep{opacity:.5}
.crumb span.now{color:var(--t-dark)}
.banner-tag{
  display:inline-flex;align-items:center;gap:8px;font-size:12px;letter-spacing:.14em;
  color:var(--cyan);border:1px solid rgba(53,224,196,.4);border-radius:999px;padding:5px 14px;margin-bottom:22px;
}
.banner-tag i{width:6px;height:6px;border-radius:50%;background:var(--pink);display:block}
.page-banner h1{
  font-size:clamp(32px,4.6vw,58px);font-weight:800;line-height:1.1;letter-spacing:-.03em;max-width:900px;
}
.page-banner h1 em{font-style:normal;color:var(--cyan)}
.banner-sub{margin-top:20px;font-size:18px;line-height:1.8;color:var(--t-dark-dim);max-width:660px}
.banner-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px}
.btn-solid{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:48px;padding:0 28px;border-radius:999px;border:1px solid var(--brand);
  background:var(--brand);color:#fff;font-size:16px;font-weight:600;cursor:pointer;
  transition:background .22s ease,color .22s ease,border-color .22s ease,transform .22s ease;
}
.btn-solid:hover{background:var(--cyan);border-color:var(--cyan);color:#0C0A14;transform:translateY(-2px)}
.btn-outline{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:48px;padding:0 28px;border-radius:999px;border:1px solid rgba(255,255,255,.28);
  background:transparent;color:var(--t-dark);font-size:16px;font-weight:600;cursor:pointer;
  transition:border-color .24s ease,background .24s ease,color .24s ease,transform .22s ease;
}
.btn-outline:hover{border-color:var(--brand);background:rgba(109,77,246,.16);transform:translateY(-2px)}
.btn-outline.dark-on-light{border-color:var(--line-light);color:var(--t-light)}
.btn-outline.dark-on-light:hover{border-color:var(--brand);background:rgba(109,77,246,.08)}
.banner-facts{
  display:flex;flex-wrap:wrap;gap:36px;margin-top:44px;padding-top:28px;border-top:1px solid var(--line-dark);
}
.banner-facts div{min-width:130px}
.banner-facts b{display:block;font-size:clamp(26px,3vw,38px);font-weight:800;color:var(--cyan);line-height:1.1}
.banner-facts span{display:block;margin-top:6px;font-size:13px;color:var(--t-dark-dim);letter-spacing:.02em}

/* ---------- 通用板块 ---------- */
.section{padding:100px 0}
.section.tight{padding:80px 0}
.section.moon{background:var(--moon)}
.section.dark{background:var(--ink);color:var(--t-dark)}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:52px;flex-wrap:wrap}
.sec-eyebrow{
  display:flex;align-items:center;gap:12px;font-size:12px;letter-spacing:.14em;color:var(--brand);margin-bottom:16px;
}
.sec-eyebrow::before{content:"";width:3px;height:16px;background:var(--brand);border-radius:2px;display:block}
.section.dark .sec-eyebrow{color:var(--cyan)}
.section.dark .sec-eyebrow::before{background:var(--cyan)}
.sec-title{font-size:clamp(28px,3.4vw,44px);font-weight:700;line-height:1.18;letter-spacing:-.02em;max-width:760px}
.sec-desc{margin-top:16px;font-size:17px;color:var(--t-light-dim);max-width:720px}
.section.dark .sec-desc{color:var(--t-dark-dim)}
.link-arrow{
  position:relative;display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--brand);
  padding-bottom:3px;
}
.section.dark .link-arrow{color:var(--cyan)}
.link-arrow::after{
  content:"";position:absolute;left:0;bottom:0;width:0;height:1px;background:currentColor;
  transition:width .26s cubic-bezier(.2,.7,.3,1);
}
.link-arrow:hover::after{width:100%}

/* 场景卡 */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--gutter)}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--gutter)}
.card{
  background:var(--white);border:1px solid var(--line-light);border-radius:var(--r-lg);
  padding:34px 30px;box-shadow:var(--sh1);
  transition:transform .28s cubic-bezier(.2,.7,.3,1),box-shadow .28s ease,border-color .28s ease;
}
.card:hover{transform:translateY(-4px);border-color:rgba(109,77,246,.4);box-shadow:var(--sh2)}
.card .idx{
  font-family:"Inter","Space Grotesk",ui-monospace,monospace;font-size:13px;font-weight:600;
  letter-spacing:.14em;color:var(--brand);
}
.card h3{margin-top:18px;font-size:21px;font-weight:600;line-height:1.4}
.card p{margin-top:12px;font-size:16px;color:var(--t-light-dim);line-height:1.8}
.card ul{margin-top:18px;display:flex;flex-direction:column;gap:10px}
.card ul li{position:relative;padding-left:18px;font-size:15px;color:var(--t-light-dim)}
.card ul li::before{content:"";position:absolute;left:0;top:11px;width:7px;height:1px;background:var(--cyan)}

/* 步骤条 */
.steps{margin-top:8px;position:relative;max-width:900px}
.step{position:relative;padding:0 0 40px 52px}
.step:last-child{padding-bottom:0}
.step::before{
  content:"";position:absolute;left:15px;top:26px;bottom:0;width:1px;background:var(--line-dark);
}
.section.moon .step::before{background:var(--line-light)}
.step:last-child::before{display:none}
.step .dot{
  position:absolute;left:0;top:4px;width:31px;height:31px;border-radius:50%;
  border:1px solid rgba(53,224,196,.45);background:var(--ink);color:var(--cyan);
  display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:600;
  font-family:"Inter","Space Grotesk",ui-monospace,monospace;
}
.section.dark .step .dot{background:var(--panel)}
.step h3{font-size:22px;font-weight:600;line-height:1.4}
.section.dark .step h3{color:var(--t-dark)}
.step p{margin-top:10px;font-size:16px;color:var(--t-light-dim);max-width:680px}
.section.dark .step p{color:var(--t-dark-dim)}
.step .deliver{
  display:inline-flex;align-items:center;gap:8px;margin-top:14px;font-size:13px;letter-spacing:.02em;
  color:var(--cyan);border:1px solid rgba(53,224,196,.32);border-radius:999px;padding:4px 13px;
}

/* 信息卡（带图） */
.info-card{
  background:var(--white);border:1px solid var(--line-light);border-radius:var(--r-lg);
  overflow:hidden;box-shadow:var(--sh1);display:flex;flex-direction:column;
  transition:transform .28s cubic-bezier(.2,.7,.3,1),box-shadow .28s ease,border-color .28s ease;
}
.info-card:hover{transform:translateY(-4px);border-color:rgba(109,77,246,.4);box-shadow:var(--sh2)}
.info-card img{width:100%;aspect-ratio:16/9;object-fit:cover}
.info-card .body{padding:30px 30px 34px;display:flex;flex-direction:column;flex:1}
.pill{
  display:inline-flex;align-items:center;gap:8px;align-self:flex-start;
  font-size:12px;letter-spacing:.14em;color:var(--brand);border:1px solid rgba(109,77,246,.28);
  border-radius:999px;padding:4px 13px;
}
.pill i{width:6px;height:6px;border-radius:50%;background:var(--pink);display:block}
.info-card h3{margin-top:16px;font-size:21px;font-weight:600;line-height:1.4}
.info-card p{margin-top:12px;font-size:16px;color:var(--t-light-dim)}
.info-card .body .link-arrow{margin-top:auto;padding-top:22px}

/* 对比表 */
.cmp-wrap{margin-top:56px;overflow-x:auto}
table.cmp{width:100%;min-width:640px;border-collapse:collapse;font-size:16px}
table.cmp caption{
  text-align:left;font-size:14px;color:var(--t-light-dim);padding-bottom:16px;letter-spacing:.02em;
  caption-side:top;
}
table.cmp th,table.cmp td{padding:18px 14px;text-align:left;border-bottom:1px solid var(--line-light)}
table.cmp thead th{
  font-size:13px;letter-spacing:.14em;color:var(--t-light-dim);font-weight:600;border-bottom:1px solid rgba(18,16,26,.18);
}
table.cmp tbody th{font-weight:600;color:var(--t-light);width:32%}
table.cmp tbody td{color:var(--t-light-dim)}
table.cmp td strong{color:var(--brand);font-weight:600}

/* FAQ */
.faq{max-width:820px;margin:0 auto}
.accordion-item{background:transparent;border:0;border-top:1px solid var(--line-light);border-radius:0}
.accordion-item:last-child{border-bottom:1px solid var(--line-light)}
.accordion-button{
  background:transparent;color:var(--t-light);font-size:18px;font-weight:600;line-height:1.5;
  padding:24px 44px 24px 0;border-radius:0;box-shadow:none;
}
.accordion-button:not(.collapsed){color:var(--brand);background:transparent;box-shadow:none}
.accordion-button:focus{box-shadow:none;border-color:transparent;outline:2px solid var(--cyan);outline-offset:2px}
.accordion-button::after{
  content:"";width:16px;height:16px;background:none;position:absolute;right:8px;top:50%;
  transform:translateY(-50%);border:0;
  background-image:linear-gradient(var(--brand),var(--brand)),linear-gradient(var(--brand),var(--brand));
  background-size:100% 1.5px,1.5px 100%;background-position:center;background-repeat:no-repeat;
  transition:transform .28s cubic-bezier(.2,.7,.3,1);
}
.accordion-button:not(.collapsed)::after{transform:translateY(-50%) rotate(135deg);background-image:linear-gradient(var(--brand),var(--brand)),linear-gradient(var(--brand),var(--brand))}
.accordion-body{padding:0 60px 28px 0;font-size:16px;color:var(--t-light-dim);line-height:1.9}

/* CTA + 表单 */
.cta-band{background:var(--ink);color:var(--t-dark);padding:96px 0}
.cta-grid{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:start}
.cta-band h2{font-size:clamp(28px,3.2vw,42px);font-weight:700;line-height:1.2;letter-spacing:-.02em}
.cta-band .lead{margin-top:20px;font-size:17px;color:var(--t-dark-dim);max-width:520px}
.cta-list{margin-top:32px;display:flex;flex-direction:column;gap:0}
.cta-list li{
  display:flex;gap:14px;align-items:flex-start;padding:16px 0;border-top:1px solid var(--line-dark);
  font-size:16px;color:var(--t-dark-dim);
}
.cta-list li:last-child{border-bottom:1px solid var(--line-dark)}
.cta-list li b{color:var(--t-dark);font-weight:600;flex:0 0 auto;min-width:96px}
.form-card{
  background:var(--panel);border:1px solid var(--line-dark);border-radius:var(--r-lg);padding:36px 34px;
}
.form-card h3{font-size:20px;font-weight:600;color:var(--t-dark)}
.form-card .hint{margin-top:10px;font-size:14px;color:var(--t-dark-dim)}
.field{margin-top:26px}
.field label{display:block;font-size:13px;letter-spacing:.06em;color:var(--t-dark-dim);margin-bottom:8px}
.field input,.field textarea{
  width:100%;background:transparent;border:0;border-bottom:1px solid rgba(255,255,255,.22);
  color:var(--t-dark);font-size:16px;padding:10px 2px;font-family:inherit;
  transition:border-color .24s ease;
}
.field textarea{resize:vertical;min-height:78px;line-height:1.8}
.field input::placeholder,.field textarea::placeholder{color:rgba(156,150,176,.7)}
.field input:focus,.field textarea:focus{border-bottom-color:var(--cyan);outline:none}
.form-card .btn-solid{width:100%;margin-top:32px}
.form-note{margin-top:14px;font-size:13px;color:var(--t-dark-dim)}
.form-msg{
  display:none;margin-top:16px;font-size:14px;color:var(--cyan);
  border:1px solid rgba(53,224,196,.35);border-radius:10px;padding:12px 14px;
}
.form-msg.show{display:block}

/* 页脚 */
.site-footer{background:var(--ink);color:var(--t-dark-dim);padding:72px 0 32px;border-top:1px solid var(--line-dark)}
.ft-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px}
.ft-brand .logo-text{font-size:20px}
.ft-brand p{margin-top:18px;font-size:15px;line-height:1.85;max-width:340px}
.ft-domain{margin-top:16px;font-size:13px;letter-spacing:.06em;color:var(--t-dark);opacity:.6}
.ft-col h3{font-size:13px;letter-spacing:.14em;color:var(--t-dark);font-weight:600;margin-bottom:16px}
.ft-col a{display:block;font-size:15px;padding:7px 0;color:var(--t-dark-dim);border-bottom:1px solid var(--line-dark)}
.ft-col a:last-child{border-bottom:1px solid var(--line-dark)}
.ft-col a:hover{color:var(--cyan)}
.ft-bottom{
  margin-top:52px;padding-top:24px;border-top:1px solid var(--line-dark);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:14px;
}
.to-top{color:var(--t-dark-dim);min-height:44px;display:inline-flex;align-items:center}
.to-top:hover{color:var(--cyan)}

/* 动效 */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .38s ease,transform .38s cubic-bezier(.2,.7,.3,1)}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
  *{transition-duration:.001ms !important;animation-duration:.001ms !important}
}

/* 响应式 */
@media (max-width:1199px){
  .hd-search{width:180px}
  .hd-nav a{padding:0 10px}
}
@media (max-width:991px){
  .hd-nav,.hd-right .hd-search,.hd-right .hd-link,.hd-right .btn-ghost-dark,.hd-right .btn-primary-dark{display:none}
  .hd-burger{display:flex}
  .hd-inner{height:68px;justify-content:space-between}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .cta-grid{grid-template-columns:1fr;gap:44px}
  .ft-grid{grid-template-columns:1fr 1fr;gap:32px}
  .section{padding:72px 0}
  .section.tight{padding:60px 0}
  .sec-head{margin-bottom:38px}
}
@media (max-width:767px){
  body{font-size:16px}
  .container{padding:0 18px}
  .grid-3,.grid-2{grid-template-columns:1fr}
  .page-banner{padding:56px 0 52px}
  .page-banner h1{font-size:clamp(30px,8vw,40px)}
  .banner-sub{font-size:16px}
  .banner-facts{gap:22px;margin-top:34px}
  .banner-facts div{min-width:44%}
  .banner-actions{gap:12px}
  .banner-actions .btn-solid,.banner-actions .btn-outline{width:100%}
  .section{padding:56px 0}
  .section.tight{padding:48px 0}
  .card{padding:26px 22px}
  .step{padding-left:44px;padding-bottom:32px}
  .step .dot{width:26px;height:26px;font-size:12px}
  .step::before{left:12px}
  .accordion-button{font-size:16px;padding:20px 40px 20px 0}
  .accordion-body{padding-right:16px}
  .cta-band{padding:64px 0}
  .form-card{padding:28px 22px}
  .ft-grid{grid-template-columns:1fr}
  .ft-bottom{flex-direction:column;align-items:flex-start}
  table.cmp th,table.cmp td{padding:14px 10px}
}

/* roulang page: category2 */
:root{
  --brand:#6D4DF6;
  --brand-deep:#4A2FD1;
  --accent:#35E0C4;
  --pink:#FF6FA5;
  --gold:#E5C172;
  --ink:#0C0A14;
  --panel:#15121F;
  --moon:#F4F2F8;
  --white:#FFFFFF;
  --t-dark:#F3F1F9;
  --t-dark-2:#9C96B0;
  --t-light:#12101A;
  --t-body:#38334A;
  --t-light-2:#5B5670;
  --line-dark:rgba(255,255,255,.08);
  --line-light:rgba(18,16,26,.10);
  --r:14px;
  --r-lg:18px;
  --pill:999px;
  --sh-1:0 2px 8px rgba(12,10,20,.06);
  --sh-2:0 18px 48px rgba(12,10,20,.14);
  --ease:cubic-bezier(.2,.7,.3,1);
  --mono:"Inter","Space Grotesk",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --bs-primary:#6D4DF6;
  --bs-body-bg:#FFFFFF;
  --bs-body-color:#12101A;
  --bs-border-radius:14px;
  --bs-font-sans-serif:"HarmonyOS Sans SC","Source Han Sans SC","Noto Sans SC","PingFang SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --bs-link-color:#4A2FD1;
  --bs-link-hover-color:#6D4DF6;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"HarmonyOS Sans SC","Source Han Sans SC","Noto Sans SC","PingFang SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--t-light);
  background:var(--white);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
a:hover{color:inherit}
button,input,textarea,select{font:inherit;color:inherit}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}
::selection{background:rgba(109,77,246,.22)}

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

/* ---------- buttons ---------- */
.btn-solid,.btn-ghost,.btn-line{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--pill);font-size:14px;font-weight:600;
  padding:11px 22px;min-height:44px;border:1px solid transparent;cursor:pointer;
  transition:background-color .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),transform .22s var(--ease);
}
.btn-solid{background:var(--brand);color:#fff}
.btn-solid:hover{background:var(--accent);color:var(--ink);transform:translateY(-2px)}
.btn-ghost{background:transparent;color:var(--t-dark);border-color:var(--line-dark)}
.btn-ghost:hover{border-color:var(--brand);background:rgba(109,77,246,.16);color:#fff}
.btn-line{background:transparent;color:var(--brand-deep);border-color:rgba(109,77,246,.45)}
.btn-line:hover{background:rgba(109,77,246,.08);border-color:var(--brand);color:var(--brand-deep)}
.btn-sm{padding:9px 18px;font-size:13.5px;min-height:40px}
.btn-full{width:100%}

/* ---------- tags ---------- */
.tag{
  display:inline-flex;align-items:center;gap:7px;
  padding:6px 14px;border-radius:var(--pill);
  font-size:12px;letter-spacing:.14em;
  color:var(--t-light-2);background:var(--moon);border:1px solid var(--line-light);
}
.tag::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--pink)}
.tag.on-dark{color:var(--t-dark-2);background:rgba(255,255,255,.05);border-color:var(--line-dark)}
.tag.on-dark::before{background:var(--accent)}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:transparent;
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid transparent;
  transition:background-color .28s var(--ease),border-color .28s var(--ease);
}
.site-header.is-scrolled{background:rgba(12,10,20,.92);border-bottom-color:var(--line-dark)}
.hd-inner{display:flex;align-items:center;gap:20px;min-height:72px}
.hd-logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;color:#fff}
.logo-mark{position:relative;width:22px;height:22px;flex:0 0 auto}
.logo-mark::before{
  content:"";position:absolute;inset:0;background:linear-gradient(140deg,var(--brand),var(--accent));
  clip-path:polygon(50% 0,61% 39%,100% 50%,61% 61%,50% 100%,39% 61%,0 50%,39% 39%);
}
.logo-mark::after{content:"";position:absolute;width:5px;height:5px;border-radius:50%;background:var(--accent);right:-3px;top:-2px}
.hd-logo .logo-text{font-size:19px;font-weight:800;letter-spacing:-.02em}
.hd-logo .logo-text em{font-style:normal;color:var(--accent)}
.hd-nav{display:flex;align-items:center;gap:4px;flex:1 1 auto;justify-content:center}
.hd-nav a{
  position:relative;padding:10px 14px;border-radius:10px;
  font-size:15px;color:var(--t-dark-2);
  transition:color .2s var(--ease),background-color .2s var(--ease);
}
.hd-nav a:hover{color:#fff;background:rgba(255,255,255,.06)}
.hd-nav a.active{color:#fff}
.hd-nav a.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:3px;height:2px;
  background:var(--accent);border-radius:2px;
}
.hd-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.hd-search input{
  width:220px;padding:9px 18px;border-radius:var(--pill);
  background:rgba(255,255,255,.06);border:1px solid var(--line-dark);
  font-size:14px;color:var(--t-dark);
  transition:border-color .22s var(--ease),background-color .22s var(--ease);
}
.hd-search input::placeholder{color:var(--t-dark-2)}
.hd-search input:focus{outline:none;border-color:var(--brand);background:rgba(255,255,255,.1)}
.hd-link{font-size:14px;color:var(--t-dark-2);padding:8px 4px;position:relative;transition:color .2s var(--ease)}
.hd-link:hover{color:#fff}
.hd-link::after{content:"";position:absolute;left:4px;right:4px;bottom:2px;height:1px;background:var(--accent);width:0;transition:width .28s var(--ease)}
.hd-link:hover::after{width:calc(100% - 8px)}
.hd-toggle{
  display:none;width:44px;height:44px;border-radius:12px;
  background:rgba(255,255,255,.06);border:1px solid var(--line-dark);
  align-items:center;justify-content:center;cursor:pointer;
}
.hd-toggle span{display:block;width:18px;height:2px;background:#fff;position:relative;border-radius:2px}
.hd-toggle span::before,.hd-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:#fff;border-radius:2px}
.hd-toggle span::before{top:-6px}
.hd-toggle span::after{top:6px}
.hd-drawer{display:none;background:rgba(12,10,20,.97);border-top:1px solid var(--line-dark);overflow:hidden;max-height:0;transition:max-height .3s var(--ease)}
.hd-drawer .container{padding-top:14px;padding-bottom:20px}
.hd-drawer a{display:block;padding:13px 12px;border-radius:12px;font-size:15px;color:var(--t-dark-2)}
.hd-drawer a:hover{background:rgba(255,255,255,.06);color:#fff}
.hd-drawer a.active{color:#fff;background:rgba(109,77,246,.18)}
.hd-drawer .btn-solid{margin-top:12px}

/* ---------- page hero ---------- */
.page-hero{
  position:relative;isolation:isolate;overflow:hidden;
  background-color:var(--ink);
  background-image:url(/assets/images/backpic/back-1.png);
  background-size:cover;background-position:center;
  padding:64px 0 60px;color:var(--t-dark);
}
.page-hero::before{
  content:"";position:absolute;inset:0;z-index:-1;
  background:linear-gradient(180deg,rgba(12,10,20,.86) 0%,rgba(12,10,20,.93) 100%);
}
.page-hero::after{
  content:"";position:absolute;inset:0;z-index:-1;pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.12) 1px,transparent 1px);
  background-size:26px 26px;opacity:.45;
}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--t-dark-2);margin-bottom:22px}
.crumb a{color:var(--t-dark-2);transition:color .2s var(--ease)}
.crumb a:hover{color:var(--accent)}
.crumb .sep{opacity:.45}
.crumb .cur{color:var(--t-dark)}
.page-hero h1{
  font-size:clamp(30px,4.4vw,54px);font-weight:800;line-height:1.1;letter-spacing:-.03em;
  margin-bottom:18px;max-width:900px;
}
.page-hero h1 em{font-style:normal;color:var(--accent)}
.page-hero .lead{max-width:720px;font-size:17px;line-height:1.8;color:#C9C4DA;margin-bottom:24px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px}

/* ---------- sections ---------- */
.section{padding:96px 0}
.section-moon{background:var(--moon)}
.section-head{margin-bottom:40px;max-width:820px}
.section-head .idx{
  display:block;font-family:var(--mono);font-size:13px;letter-spacing:.16em;
  color:var(--brand);margin-bottom:12px;
}
.section-head h2{
  font-size:clamp(26px,3.2vw,40px);font-weight:700;line-height:1.2;letter-spacing:-.02em;
  padding-left:16px;position:relative;
}
.section-head h2::before{content:"";position:absolute;left:0;top:.16em;bottom:.16em;width:3px;border-radius:2px;background:var(--brand)}
.section-head p{margin-top:14px;color:var(--t-light-2);font-size:16px;max-width:720px}

/* ---------- doc layout ---------- */
.doc-wrap{padding:80px 0 32px}
.doc-aside{position:sticky;top:96px}
.aside-card{
  border:1px solid var(--line-light);border-radius:var(--r-lg);background:#fff;
  padding:22px;box-shadow:var(--sh-1);
}
.aside-card h2{font-size:13px;letter-spacing:.16em;color:var(--t-light-2);font-weight:600;margin-bottom:14px}
.toc-list{display:flex;flex-direction:column;gap:2px}
.toc-list a{
  display:block;padding:10px 12px;border-radius:10px;font-size:14.5px;color:var(--t-body);
  transition:background-color .2s var(--ease),color .2s var(--ease);
}
.toc-list a:hover{background:var(--moon);color:var(--brand-deep)}
.aside-cta{
  margin-top:20px;padding:24px;border-radius:var(--r-lg);
  border:1px solid rgba(109,77,246,.42);
  background:linear-gradient(160deg,rgba(109,77,246,.07),rgba(53,224,196,.06));
}
.aside-cta h3{font-size:18px;font-weight:700;line-height:1.4;margin-bottom:10px}
.aside-cta p{font-size:14px;color:var(--t-light-2);line-height:1.8;margin-bottom:16px}
.aside-meta{margin-top:18px;padding-top:16px;border-top:1px solid var(--line-light);font-size:13px;color:var(--t-light-2);line-height:1.9}
.aside-meta span{display:block}
.aside-meta b{font-family:var(--mono);color:var(--brand-deep);font-weight:600}

.doc-sec{padding:38px 0;border-top:1px solid var(--line-light)}
.doc-sec:first-of-type{border-top:0;padding-top:0}
.doc-sec h2{
  position:relative;padding-left:16px;margin-bottom:18px;
  font-size:clamp(21px,2.4vw,29px);font-weight:700;line-height:1.35;letter-spacing:-.02em;
}
.doc-sec h2::before{content:"";position:absolute;left:0;top:.18em;bottom:.18em;width:3px;border-radius:2px;background:var(--brand)}
.doc-sec p{color:var(--t-body);line-height:1.9;margin-bottom:16px}
.doc-sec p:last-child{margin-bottom:0}

.num-list{margin:20px 0 4px;border-top:1px solid var(--line-light)}
.num-list li{
  display:flex;gap:16px;padding:14px 0;border-bottom:1px solid var(--line-light);
  font-size:15.5px;color:var(--t-body);line-height:1.75;
}
.num-list .no{font-family:var(--mono);font-size:13.5px;font-weight:600;letter-spacing:.06em;color:var(--brand);flex:0 0 auto;padding-top:2px}

.quote{
  border-left:3px solid var(--accent);background:var(--moon);
  border-radius:0 12px 12px 0;padding:18px 22px;margin:22px 0;
  font-size:16px;color:var(--t-light);line-height:1.85;
}
.doc-figure{margin:26px 0}
.doc-figure .frame{border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line-light);box-shadow:var(--sh-1)}
.doc-figure img{width:100%;aspect-ratio:16/9;object-fit:cover}
.doc-figure figcaption{font-size:13px;color:var(--t-light-2);padding:12px 4px 0}

/* ---------- stat band ---------- */
.stat-band{background:var(--ink);color:var(--t-dark);padding:72px 0}
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:28px}
.stat{border-left:1px solid rgba(53,224,196,.34);padding-left:20px}
.stat .num{
  font-family:var(--mono);font-size:clamp(32px,3.8vw,52px);font-weight:700;line-height:1;
  letter-spacing:-.02em;color:#fff;
}
.stat .num span{color:var(--accent)}
.stat p{margin-top:14px;font-size:13.5px;color:var(--t-dark-2);line-height:1.7}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:820px}
.faq-wrap .accordion{--bs-accordion-bg:transparent;--bs-accordion-border-width:0;--bs-accordion-border-radius:0}
.faq-wrap .accordion-item{background:transparent;border:0;border-top:1px solid var(--line-light);border-radius:0}
.faq-wrap .accordion-item:last-child{border-bottom:1px solid var(--line-light)}
.faq-wrap .accordion-header{margin:0}
.faq-wrap .accordion-button{
  position:relative;background:transparent;border-radius:0;box-shadow:none;
  padding:22px 48px 22px 0;font-size:17px;font-weight:600;color:var(--t-light);
  transition:color .24s var(--ease);
}
.faq-wrap .accordion-button:not(.collapsed){color:var(--brand);background:transparent;box-shadow:none}
.faq-wrap .accordion-button:focus{box-shadow:none;outline:2px solid var(--accent);outline-offset:-2px}
.faq-wrap .accordion-button::after{display:none}
.acc-plus{position:absolute;right:6px;top:50%;width:16px;height:16px;margin-top:-8px}
.acc-plus::before,.acc-plus::after{content:"";position:absolute;background:var(--brand);border-radius:2px}
.acc-plus::before{left:0;right:0;top:7px;height:2px}
.acc-plus::after{top:0;bottom:0;left:7px;width:2px;transition:transform .28s var(--ease),opacity .28s var(--ease)}
.faq-wrap .accordion-button:not(.collapsed) .acc-plus::after{transform:scaleY(0);opacity:0}
.faq-wrap .accordion-body{padding:0 8px 24px 0;font-size:15.5px;color:var(--t-body);line-height:1.9}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;isolation:isolate;overflow:hidden;
  background-color:var(--ink);color:var(--t-dark);padding:96px 0;
}
.cta-band::before{
  content:"";position:absolute;inset:0;z-index:-2;
  background-image:url(/assets/images/backpic/back-2.png);
  background-size:cover;background-position:center;
}
.cta-band::after{
  content:"";position:absolute;inset:0;z-index:-1;
  background:linear-gradient(120deg,rgba(12,10,20,.94) 0%,rgba(12,10,20,.86) 55%,rgba(74,47,209,.72) 100%);
}
.cta-band h2{font-size:clamp(26px,3.2vw,38px);font-weight:700;line-height:1.22;letter-spacing:-.02em;margin-bottom:14px}
.cta-band .cta-lead{color:#C9C4DA;font-size:16px;line-height:1.85;max-width:460px}
.cta-points{margin-top:26px;border-top:1px solid var(--line-dark)}
.cta-points li{display:flex;justify-content:space-between;gap:16px;padding:13px 0;border-bottom:1px solid var(--line-dark);font-size:14.5px;color:var(--t-dark-2)}
.cta-points li b{color:var(--accent);font-family:var(--mono);font-weight:600}
.field{margin-bottom:26px}
.field label{display:block;font-size:13px;letter-spacing:.08em;color:var(--t-dark-2);margin-bottom:6px}
.field input,.field textarea{
  width:100%;background:transparent;border:0;border-bottom:1px solid rgba(255,255,255,.2);
  padding:10px 0;font-size:15px;color:var(--t-dark);resize:vertical;
  transition:border-color .22s var(--ease);
}
.field input::placeholder,.field textarea::placeholder{color:rgba(156,150,176,.75)}
.field input:focus,.field textarea:focus{outline:none;border-bottom-color:var(--accent)}
.form-note{margin-top:16px;font-size:12.5px;color:var(--t-dark-2);letter-spacing:.02em}
.form-tip{margin-top:14px;font-size:14px;color:var(--accent);display:none}
.form-tip.show{display:block}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:var(--t-dark-2);padding:72px 0 28px;border-top:1px solid var(--line-dark)}
.ft-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:36px;padding-bottom:42px}
.ft-brand .logo-text{display:block;font-size:20px;font-weight:800;color:#fff;letter-spacing:-.02em;margin-bottom:14px}
.ft-brand .logo-text em{font-style:normal;color:var(--accent)}
.ft-brand p{font-size:14px;line-height:1.85;max-width:340px;margin-bottom:12px}
.ft-domain{font-family:var(--mono);font-size:13px;letter-spacing:.08em;color:var(--gold)}
.ft-col h3{font-size:14px;font-weight:600;color:#fff;letter-spacing:.08em;margin-bottom:14px}
.ft-col a{display:block;padding:6px 0;font-size:14px;color:var(--t-dark-2);transition:color .2s var(--ease)}
.ft-col a:hover{color:var(--accent)}
.ft-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  border-top:1px solid var(--line-dark);padding-top:22px;font-size:13px;
}
.to-top{transition:color .2s var(--ease)}
.to-top:hover{color:var(--accent)}

/* ---------- motion ---------- */
.reveal{transition:opacity .38s var(--ease),transform .38s var(--ease)}
.js .reveal{opacity:0;transform:translateY(16px)}
.js .reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .js .reveal{opacity:1;transform:none}
  *{transition-duration:.01ms !important;animation-duration:.01ms !important}
}

/* ---------- responsive ---------- */
@media (max-width:1199.98px){
  .stat-grid{grid-template-columns:repeat(2,1fr);gap:24px}
}
@media (max-width:991.98px){
  .hd-nav,.hd-search,.hd-link,.hd-actions .btn-ghost{display:none}
  .hd-toggle{display:inline-flex}
  .hd-drawer{display:block}
  .hd-inner{justify-content:space-between}
  .doc-wrap{padding:56px 0 20px}
  .doc-aside{position:static;margin-bottom:32px}
  .aside-card{padding:16px}
  .aside-card h2{margin-bottom:10px}
  .toc-list{flex-direction:row;gap:10px;overflow-x:auto;padding-bottom:6px;scrollbar-width:none}
  .toc-list::-webkit-scrollbar{display:none}
  .toc-list a{white-space:nowrap;border:1px solid var(--line-light);border-radius:var(--pill);padding:9px 16px;font-size:14px}
  .section{padding:72px 0}
  .cta-band{padding:72px 0}
  .stat-band{padding:56px 0}
}
@media (max-width:767.98px){
  .container{padding-left:18px;padding-right:18px}
  .page-hero{padding:44px 0 40px}
  .page-hero .lead{font-size:15.5px}
  .doc-sec{padding:30px 0}
  .num-list li{font-size:15px;gap:12px}
  .section{padding:56px 0}
  .ft-grid{grid-template-columns:1fr 1fr;gap:28px}
  .cta-band{padding:56px 0}
  .stat-grid{grid-template-columns:1fr 1fr;gap:20px}
  .stat{padding-left:14px}
  .faq-wrap .accordion-button{font-size:16px;padding:18px 44px 18px 0}
}
@media (max-width:520px){
  .hd-logo .logo-text{font-size:17px}
  .page-hero h1{font-size:30px}
  .ft-grid{grid-template-columns:1fr}
  .stat-grid{grid-template-columns:1fr}
  .stat{border-left:0;border-top:1px solid rgba(53,224,196,.34);padding:16px 0 0}
  .btn-solid,.btn-ghost,.btn-line{width:100%}
  .hd-actions .btn-solid{width:auto}
}