/* roulang page: index */
:root{
  --ink-900:#0A0D14;
  --ink-800:#111726;
  --ink-700:#182030;
  --ink-600:#1F2A3D;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --text-1:#EEF3FB;
  --text-2:#A7B3C8;
  --text-3:#6D7C93;
  --brand-500:#12E29B;
  --brand-600:#0BB87D;
  --brand-300:#6BF3C6;
  --violet-500:#6C4DF6;
  --violet-600:#5233DB;
  --amber-400:#FFB13D;
  --danger:#FF5C7A;
  --paper:#F4F6FB;
  --paper-text:#10141C;
  --paper-text-2:#5A6577;
  --radius-s:8px;
  --radius-m:12px;
  --radius-l:16px;
  --radius-xl:20px;
  --shadow-card:0 18px 40px rgba(0,0,0,.45);
  --shadow-btn:rgba(18,226,155,.28) 0 10px 30px;
  --ease:cubic-bezier(.2,.7,.3,1);
  --dur:180ms;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--text-1);
  font-family:"PingFang SC","HarmonyOS Sans","MiSans","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;cursor:pointer;}
h1,h2,h3,h4{margin:0;letter-spacing:-.01em;line-height:1.25;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
.num{font-variant-numeric:tabular-nums;font-weight:800;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px;}
.section{padding:88px 0;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;flex-wrap:wrap;}
.section-title{font-size:30px;font-weight:700;}
.section-desc{color:var(--text-2);font-size:16px;margin-top:10px;max-width:620px;}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--brand-300);background:rgba(18,226,155,.1);border:1px solid rgba(18,226,155,.28);padding:6px 12px;border-radius:999px;margin-bottom:16px;}
.text-link{color:var(--brand-500);font-size:14px;font-weight:600;display:inline-flex;align-items:center;gap:6px;transition:color var(--dur) var(--ease),gap var(--dur) var(--ease);}
.text-link:hover{color:var(--brand-300);gap:10px;}
.hr-line{height:1px;background:var(--line);border:0;margin:0;}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:44px;padding:0 24px;border-radius:999px;font-size:15px;font-weight:700;border:1px solid transparent;transition:transform var(--dur) var(--ease),background var(--dur) var(--ease),box-shadow var(--dur) var(--ease),border-color var(--dur) var(--ease),color var(--dur) var(--ease);}
.btn-primary{background:var(--brand-500);color:#05231A;box-shadow:var(--shadow-btn);}
.btn-primary:hover{background:var(--brand-300);transform:translateY(-1px);}
.btn-primary:active{transform:translateY(0);background:var(--brand-600);}
.btn-outline{background:transparent;color:var(--text-1);border-color:var(--line-strong);}
.btn-outline:hover{border-color:rgba(18,226,155,.6);color:var(--brand-300);transform:translateY(-1px);}
.btn-sm{height:38px;padding:0 18px;font-size:14px;border-radius:var(--radius-m);}
.btn-block{width:100%;}
a:focus-visible,button:focus-visible,.btn:focus-visible{outline:2px solid var(--brand-300);outline-offset:2px;border-radius:var(--radius-m);}

/* 徽标 / 标签 */
.badge{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:700;padding:4px 10px;border-radius:999px;background:rgba(18,226,155,.12);color:var(--brand-300);border:1px solid rgba(18,226,155,.24);}
.badge-amber{background:rgba(255,177,61,.12);color:var(--amber-400);border-color:rgba(255,177,61,.3);}
.badge-violet{background:rgba(108,77,246,.16);color:#C4B6FF;border-color:rgba(108,77,246,.36);}
.tag{display:inline-block;font-size:13px;color:var(--text-2);border:1px solid var(--line);border-radius:999px;padding:5px 12px;}

/* 顶部公告条 */
.notice-bar{height:40px;background:var(--ink-800);border-bottom:1px solid var(--line);}
.notice-inner{display:flex;align-items:center;gap:10px;height:40px;}
.notice-dot{width:8px;height:8px;border-radius:50%;background:var(--brand-500);box-shadow:0 0 0 4px rgba(18,226,155,.16);flex:0 0 auto;}
.notice-text{font-size:13px;color:var(--text-2);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;flex:1 1 auto;}
.notice-close{background:none;border:0;color:var(--text-3);font-size:14px;line-height:1;padding:6px;border-radius:6px;transition:color var(--dur) var(--ease);}
.notice-close:hover{color:var(--text-1);}

/* 导航 */
.site-nav{position:sticky;top:0;z-index:60;background:rgba(10,13,20,.72);border-bottom:1px solid transparent;transition:background var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);}
.site-nav.is-solid{background:rgba(10,13,20,.96);border-bottom-color:var(--line);box-shadow:0 12px 30px rgba(0,0,0,.4);}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;height:68px;}
.brand{display:flex;flex-direction:column;line-height:1.05;}
.brand-mark{font-size:19px;font-weight:800;color:var(--text-1);letter-spacing:.01em;}
.brand-mark em{font-style:normal;color:var(--brand-500);}
.brand-sub{font-size:11px;color:var(--text-3);letter-spacing:.22em;margin-top:3px;}
.nav-links{display:flex;align-items:center;gap:4px;}
.nav-link{display:inline-block;padding:9px 14px;border-radius:999px;font-size:15px;color:var(--text-2);transition:color var(--dur) var(--ease),background var(--dur) var(--ease);}
.nav-link:hover{color:var(--text-1);background:rgba(255,255,255,.05);}
.nav-link.active{color:var(--brand-300);background:rgba(18,226,155,.1);}
.nav-actions{display:flex;align-items:center;gap:12px;}
.nav-toggle{display:none;width:44px;height:44px;border-radius:var(--radius-m);border:1px solid var(--line-strong);background:transparent;color:var(--text-1);font-size:18px;line-height:1;}

/* 移动抽屉 */
.drawer{position:fixed;inset:0;z-index:80;background:var(--ink-900);padding:24px 20px 40px;transform:translateX(100%);transition:transform 260ms var(--ease);visibility:hidden;overflow-y:auto;}
.drawer.is-open{transform:translateX(0);visibility:visible;}
.drawer-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px;}
.drawer-close{width:44px;height:44px;border-radius:var(--radius-m);border:1px solid var(--line-strong);background:transparent;color:var(--text-1);font-size:18px;}
.drawer-list li + li{border-top:1px solid var(--line);}
.drawer-list a{display:flex;align-items:center;justify-content:space-between;padding:18px 4px;font-size:17px;color:var(--text-1);}
.drawer-list a.active{color:var(--brand-300);}
.drawer-cta{margin-top:28px;}

/* Hero */
.hero{position:relative;overflow:hidden;padding:96px 0 88px;background:radial-gradient(900px 480px at 84% 16%,rgba(18,226,155,.16),transparent 62%),radial-gradient(680px 420px at 4% 96%,rgba(108,77,246,.15),transparent 66%),var(--ink-900);}
.hero::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);background-size:32px 32px;-webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.9),transparent 86%);mask-image:linear-gradient(180deg,rgba(0,0,0,.9),transparent 86%);pointer-events:none;}
.hero-inner{position:relative;display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center;}
.hero h1{font-size:40px;font-weight:800;line-height:1.2;margin-bottom:18px;}
.hero h1 span{color:var(--brand-500);}
.hero-lead{font-size:17px;color:var(--text-2);max-width:520px;margin-bottom:28px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:36px;}
.hero-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;border-top:1px solid var(--line);padding-top:24px;}
.stat-num{font-size:22px;color:var(--text-1);}
.stat-num.brand{color:var(--brand-500);}
.stat-num.amber{color:var(--amber-400);}
.stat-label{font-size:12px;color:var(--text-3);margin-top:6px;}
.hero-visual{position:relative;}
.hero-visual img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--radius-xl);border:1px solid var(--line);}
.hero-float{position:absolute;right:-8px;bottom:-24px;background:var(--ink-700);border:1px solid var(--line);border-radius:var(--radius-l);padding:16px 18px;display:flex;align-items:center;gap:14px;box-shadow:var(--shadow-card);max-width:280px;}
.hero-float strong{display:block;font-size:14px;color:var(--text-1);}
.hero-float small{display:block;font-size:12px;color:var(--text-3);margin-top:4px;}
.hero-float .arrow{color:var(--brand-500);font-size:18px;}

/* 通用卡片 */
.card{background:var(--ink-700);border:1px solid var(--line);border-radius:var(--radius-l);padding:24px;transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);}
.card:hover{transform:translateY(-4px);border-color:rgba(18,226,155,.4);box-shadow:var(--shadow-card);}

/* 浅色三步区 */
.steps-section{background:var(--paper);color:var(--paper-text);}
.steps-section .section-title{color:var(--paper-text);}
.steps-section .section-desc{color:var(--paper-text-2);}
.steps-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;position:relative;}
.step-card{background:#fff;border-radius:var(--radius-l);padding:28px 24px;border:1px solid rgba(16,20,28,.08);box-shadow:0 10px 28px rgba(16,20,28,.07);transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease);}
.step-card:hover{transform:translateY(-4px);box-shadow:0 18px 40px rgba(16,20,28,.12);}
.step-num{font-size:44px;font-weight:800;color:rgba(16,20,28,.12);line-height:1;font-variant-numeric:tabular-nums;}
.step-title{font-size:19px;font-weight:700;color:var(--paper-text);margin:14px 0 8px;}
.step-text{font-size:15px;color:var(--paper-text-2);}
.step-connector{position:absolute;top:70px;left:calc(33.333% - 10px);width:20px;height:2px;background:repeating-linear-gradient(90deg,rgba(16,20,28,.28) 0 4px,transparent 4px 8px);}
.step-connector.c2{left:calc(66.666% - 10px);}
.step-icon{width:40px;height:40px;border-radius:var(--radius-m);display:flex;align-items:center;justify-content:center;background:rgba(18,226,155,.14);color:#0B7F5A;font-size:18px;font-weight:800;}

/* 卖点网格 */
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.feature-icon{width:44px;height:44px;border-radius:var(--radius-m);display:flex;align-items:center;justify-content:center;background:rgba(108,77,246,.18);color:#C4B6FF;font-size:18px;font-weight:800;margin-bottom:16px;}
.feature-title{font-size:19px;font-weight:700;margin-bottom:8px;}
.feature-text{font-size:15px;color:var(--text-2);}
.feature-list{margin-top:14px;display:grid;gap:8px;}
.feature-list li{position:relative;padding-left:16px;font-size:14px;color:var(--text-2);}
.feature-list li::before{content:"";position:absolute;left:0;top:9px;width:6px;height:6px;background:var(--brand-500);border-radius:2px;}

/* 案例证明 */
.proof-grid{display:grid;grid-template-columns:7fr 5fr;gap:24px;}
.proof-main{background:var(--ink-700);border:1px solid var(--line);border-radius:var(--radius-xl);overflow:hidden;transition:border-color var(--dur) var(--ease),transform var(--dur) var(--ease);}
.proof-main:hover{border-color:rgba(18,226,155,.4);transform:translateY(-4px);}
.proof-main img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.proof-body{padding:26px;}
.proof-title{font-size:22px;font-weight:700;margin-bottom:10px;}
.proof-text{font-size:15px;color:var(--text-2);}
.proof-tags{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px;}
.proof-side{display:grid;gap:24px;}
.quote-card{background:var(--ink-700);border:1px solid var(--line);border-radius:var(--radius-l);padding:24px;position:relative;transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease);}
.quote-card:hover{transform:translateY(-4px);border-color:rgba(18,226,155,.4);}
.quote-mark{font-size:32px;line-height:1;color:var(--brand-500);opacity:.7;font-weight:800;}
.quote-text{font-size:15px;color:var(--text-2);margin:12px 0 14px;}
.quote-src{font-size:13px;color:var(--text-3);}
.metric-card{background:var(--ink-800);border:1px solid var(--line);border-radius:var(--radius-l);padding:24px;display:grid;grid-template-columns:repeat(3,1fr);gap:12px;text-align:center;}
.metric-num{font-size:22px;color:var(--brand-500);}
.metric-label{font-size:12px;color:var(--text-3);margin-top:6px;}

/* 资讯列表 */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.news-card{padding:0;overflow:hidden;display:flex;flex-direction:column;}
.news-thumb{position:relative;display:block;overflow:hidden;}
.news-thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform 400ms var(--ease);}
.news-card:hover .news-thumb img{transform:scale(1.04);}
.badge-float{position:absolute;left:14px;top:14px;background:rgba(10,13,20,.85);border-color:rgba(18,226,155,.35);}
.news-body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1 1 auto;}
.news-title{font-size:17px;font-weight:700;line-height:1.5;margin-bottom:10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-title a:hover{color:var(--brand-300);}
.news-summary{font-size:14px;color:var(--text-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:auto;padding-top:16px;border-top:1px solid var(--line);font-size:13px;color:var(--text-3);}
.empty-state{background:var(--ink-800);border:1px dashed var(--line-strong);border-radius:var(--radius-l);padding:56px 24px;text-align:center;}
.empty-state .empty-icon{width:56px;height:56px;margin:0 auto 16px;border-radius:var(--radius-l);border:1px solid var(--line-strong);display:flex;align-items:center;justify-content:center;color:var(--brand-500);font-size:22px;}
.empty-state p{color:var(--text-2);margin-bottom:20px;}

/* FAQ */
.faq-wrap{max-width:860px;margin:0 auto;}
.faq-item{border:1px solid var(--line);border-radius:var(--radius-l);background:var(--ink-800);margin-bottom:14px;overflow:hidden;transition:border-color var(--dur) var(--ease);}
.faq-item.is-open{border-color:rgba(18,226,155,.35);}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;background:none;border:0;color:var(--text-1);font-size:17px;font-weight:700;text-align:left;padding:20px 22px;line-height:1.5;}
.faq-icon{flex:0 0 auto;width:26px;height:26px;border-radius:50%;border:1px solid var(--line-strong);display:flex;align-items:center;justify-content:center;font-size:15px;color:var(--text-2);transition:transform var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease);}
.faq-item.is-open .faq-icon{transform:rotate(45deg);color:var(--brand-500);border-color:rgba(18,226,155,.5);}
.faq-a{max-height:0;overflow:hidden;transition:max-height 260ms var(--ease);}
.faq-a-inner{padding:0 22px 22px 22px;border-left:3px solid var(--brand-500);margin-left:0;font-size:15px;line-height:1.8;color:var(--text-2);}

/* CTA 带 */
.cta-band{position:relative;overflow:hidden;background:var(--ink-800);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:72px 0;text-align:center;}
.cta-band::before{content:"";position:absolute;inset:-40% -10%;background:repeating-linear-gradient(8deg,rgba(18,226,155,.09) 0 12px,transparent 12px 34px);pointer-events:none;}
.cta-inner{position:relative;max-width:720px;margin:0 auto;}
.cta-title{font-size:30px;font-weight:700;margin-bottom:14px;}
.cta-text{color:var(--text-2);margin-bottom:28px;}
.cta-actions{display:flex;justify-content:center;align-items:center;gap:20px;flex-wrap:wrap;}

/* 页脚 */
.site-footer{background:var(--ink-900);border-top:1px solid var(--line);padding:64px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:32px;padding-bottom:48px;}
.footer-brand .brand-mark{font-size:18px;}
.footer-desc{font-size:14px;color:var(--text-3);margin-top:14px;max-width:280px;}
.footer-social{display:flex;gap:10px;margin-top:18px;}
.footer-social span{width:36px;height:36px;border-radius:var(--radius-m);border:1px solid var(--line);display:flex;align-items:center;justify-content:center;font-size:13px;color:var(--text-3);transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);}
.footer-social span:hover{color:var(--brand-300);border-color:rgba(18,226,155,.4);}
.footer-title{font-size:14px;color:var(--text-1);font-weight:700;margin-bottom:16px;}
.footer-links li{margin-bottom:10px;}
.footer-links a,.footer-info li{font-size:14px;color:var(--text-3);transition:color var(--dur) var(--ease);}
.footer-links a:hover{color:var(--brand-300);}
.footer-info li{margin-bottom:10px;}
.footer-bottom{border-top:1px solid var(--line);padding:20px 0 28px;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:var(--text-3);}

/* 响应式 */
@media (max-width:1024px){
  .nav-links{display:none;}
  .nav-toggle{display:flex;align-items:center;justify-content:center;}
  .nav-cta{display:none;}
  .hero{padding:72px 0 64px;}
  .hero-inner{grid-template-columns:1fr;gap:40px;}
  .hero h1{font-size:32px;}
  .hero-visual{order:2;}
  .hero-float{position:static;margin-top:16px;max-width:none;}
  .section{padding:72px 0;}
  .feature-grid{grid-template-columns:repeat(2,1fr);}
  .news-grid{grid-template-columns:repeat(2,1fr);}
  .proof-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:768px){
  .container{padding:0 20px;}
  .section{padding:56px 0;}
  .hero h1{font-size:28px;}
  .section-title{font-size:23px;}
  .steps-grid{grid-template-columns:1fr;}
  .step-connector{display:none;}
  .feature-grid{grid-template-columns:1fr;}
  .news-grid{grid-template-columns:1fr;}
  .hero-stats{grid-template-columns:1fr;gap:14px;}
  .cta-title{font-size:23px;}
  .cta-actions .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .metric-card{grid-template-columns:1fr;}
}
@media (max-width:520px){
  .brand-mark{font-size:17px;}
  .hero-actions .btn{width:100%;}
  .section-head{margin-bottom:26px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition-duration:.01ms !important;animation-duration:.01ms !important;}
}

/* roulang page: article */
:root{
  --ink-900:#0A0D14;
  --ink-800:#111726;
  --ink-700:#182030;
  --ink-600:#1F2A3D;
  --line:rgba(255,255,255,.08);
  --text-1:#EEF3FB;
  --text-2:#A7B3C8;
  --text-3:#6D7C93;
  --brand-500:#12E29B;
  --brand-600:#0BB87D;
  --brand-300:#6BF3C6;
  --violet-500:#6C4DF6;
  --violet-600:#5233DB;
  --amber-400:#FFB13D;
  --danger:#FF5C7A;
  --radius-sm:8px;
  --radius-md:16px;
  --radius-lg:20px;
  --radius-btn:12px;
  --shadow-card:0 18px 40px rgba(0,0,0,.45);
  --ease:180ms cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--text-1);
  font-family:"PingFang SC","HarmonyOS Sans","MiSans","Source Han Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
a{color:inherit;text-decoration:none;}
ul,ol{list-style:none;margin:0;padding:0;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
:focus-visible{outline:2px solid var(--brand-300);outline-offset:2px;border-radius:6px;}
.num{font-variant-numeric:tabular-nums;font-weight:700;}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px;}

/* ============ 导航 ============ */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(10,13,20,.94);
  border-bottom:1px solid var(--line);
  transition:var(--ease);
}
.site-nav{position:relative;}
.nav-inner{
  display:flex;align-items:center;gap:24px;height:68px;
}
.brand{display:flex;flex-direction:column;line-height:1;gap:3px;flex:0 0 auto;}
.brand-mark{font-size:20px;font-weight:800;letter-spacing:-.01em;color:var(--text-1);}
.brand-mark em{font-style:normal;color:var(--brand-500);}
.brand-sub{font-size:11px;color:var(--text-3);letter-spacing:.28em;}
.nav-links{display:flex;align-items:center;gap:28px;margin-left:auto;}
.nav-link{
  position:relative;display:inline-block;padding:6px 0;
  font-size:15px;color:var(--text-2);transition:var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;border-radius:2px;
  background:var(--brand-500);transform:scaleX(0);transform-origin:left;transition:var(--ease);
}
.nav-link:hover{color:var(--text-1);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.active{color:var(--brand-500);}
.nav-link.active::after{transform:scaleX(1);}
.nav-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto;}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 24px;border-radius:999px;
  font-size:15px;font-weight:700;letter-spacing:.01em;
  transition:var(--ease);white-space:nowrap;
}
.btn-primary{
  background:var(--brand-500);color:#04160E;
  box-shadow:0 10px 30px rgba(18,226,155,.28);
}
.btn-primary:hover{background:var(--brand-600);transform:translateY(-1px);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{
  background:transparent;color:var(--text-1);
  border:1px solid var(--line);border-radius:var(--radius-btn);height:44px;padding:0 22px;
}
.btn-ghost:hover{border-color:rgba(18,226,155,.55);color:var(--brand-300);}
.text-link{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--brand-300);font-weight:600;font-size:15px;transition:var(--ease);
}
.text-link i{transition:var(--ease);}
.text-link:hover i{transform:translateX(4px);}
.nav-toggle{
  display:none;width:44px;height:44px;align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:12px;font-size:18px;color:var(--text-1);
}

/* ============ 面包屑与文章头 ============ */
.article-hero{
  position:relative;
  padding:36px 0 88px;
  background:
    radial-gradient(900px 380px at 12% -10%, rgba(18,226,155,.12), transparent 62%),
    radial-gradient(760px 340px at 92% 4%, rgba(108,77,246,.14), transparent 66%),
    var(--ink-900);
  border-bottom:1px solid var(--line);
}
.crumb{
  display:flex;align-items:center;flex-wrap:wrap;gap:10px;
  font-size:13px;color:var(--text-3);margin-bottom:28px;
}
.crumb a{color:var(--text-2);transition:var(--ease);}
.crumb a:hover{color:var(--brand-300);}
.crumb .sep{color:var(--brand-500);font-weight:700;}
.crumb .current{color:var(--text-3);max-width:520px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}

.article-layout{
  display:grid;grid-template-columns:minmax(0,760px) 300px;
  gap:56px;justify-content:center;align-items:start;
}
.article-main{min-width:0;}
.badge-cat{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;
  background:rgba(18,226,155,.12);color:var(--brand-300);
  font-size:12px;font-weight:700;letter-spacing:.04em;
}
.article-title{
  margin:18px 0 20px;font-size:40px;line-height:1.2;font-weight:800;letter-spacing:-.01em;
  color:var(--text-1);
}
.meta-row{
  display:flex;flex-wrap:wrap;gap:8px 24px;font-size:13px;color:var(--text-3);
  padding-bottom:26px;border-bottom:1px solid var(--line);
}
.meta-row time{color:var(--text-2);}
.meta-row .dot{color:var(--brand-500);}

.cover-figure{
  margin:32px 0 0;border-radius:14px;overflow:hidden;
  border:1px solid var(--line);background:var(--ink-800);
}
.cover-figure img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.cover-figure figcaption{
  padding:12px 16px;font-size:13px;color:var(--text-3);background:var(--ink-800);
  border-top:1px solid var(--line);text-align:center;
}

/* ============ 正文排版 ============ */
.article-body{
  margin-top:36px;
  font-size:17px;line-height:1.9;color:#DCE4F0;letter-spacing:0;
}
.article-body > *:first-child{margin-top:0;}
.article-body p{margin:0 0 20px;}
.article-body h2{
  position:relative;margin:48px 0 18px;padding-left:16px;
  font-size:26px;line-height:1.35;font-weight:700;letter-spacing:-.01em;color:var(--text-1);
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.2em;bottom:.2em;width:4px;border-radius:2px;
  background:var(--brand-500);
}
.article-body h3{margin:32px 0 14px;font-size:20px;line-height:1.4;font-weight:700;color:var(--text-1);}
.article-body h4{margin:26px 0 12px;font-size:17px;font-weight:700;color:var(--text-1);}
.article-body ul,.article-body ol{margin:0 0 22px;padding-left:24px;}
.article-body ul{list-style:square;}
.article-body ol{list-style:decimal;}
.article-body li{margin:8px 0;padding-left:4px;}
.article-body ul li::marker{color:var(--brand-500);}
.article-body ol li::marker{color:var(--brand-500);font-weight:700;}
.article-body a{
  color:var(--brand-300);text-decoration:underline;text-underline-offset:3px;
  text-decoration-color:rgba(107,243,198,.5);transition:var(--ease);
}
.article-body a:hover{color:var(--brand-500);text-decoration-color:var(--brand-500);}
.article-body strong{color:var(--text-1);font-weight:700;}
.article-body blockquote{
  margin:26px 0;padding:16px 20px;border-left:3px solid var(--brand-500);
  background:var(--ink-800);border-radius:0 12px 12px 0;color:var(--text-2);
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{border-radius:14px;margin:26px auto;border:1px solid var(--line);}
.article-body figure{margin:26px 0;}
.article-body figcaption{font-size:13px;color:var(--text-3);text-align:center;margin-top:10px;}
.article-body table{width:100%;border-collapse:collapse;margin:26px 0;font-size:15px;}
.article-body thead th{
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  padding:12px 14px;text-align:left;color:var(--text-1);font-weight:700;
}
.article-body tbody td{padding:12px 14px;border-bottom:1px solid var(--line);color:var(--text-2);}
.article-body tbody tr:nth-child(even){background:rgba(255,255,255,.02);}
.article-body code{
  background:var(--ink-700);border:1px solid var(--line);border-radius:6px;
  padding:2px 6px;font-size:14px;color:var(--brand-300);
}
.article-body hr{border:0;border-top:1px solid var(--line);margin:36px 0;}

.empty-state{
  margin-top:36px;padding:44px 28px;text-align:center;
  background:var(--ink-800);border:1px solid var(--line);border-radius:var(--radius-md);
}
.empty-state i{font-size:30px;color:var(--brand-500);}
.empty-state h2{margin:16px 0 10px;font-size:22px;font-weight:700;color:var(--text-1);}
.empty-state p{margin:0 0 22px;color:var(--text-2);font-size:15px;}

/* ============ 标签、翻页、推荐 ============ */
.tag-list{display:flex;flex-wrap:wrap;gap:10px;margin:40px 0 0;padding-top:26px;border-top:1px solid var(--line);}
.tag{
  display:inline-flex;align-items:center;height:32px;padding:0 14px;border-radius:999px;
  border:1px solid var(--line);background:var(--ink-800);
  font-size:13px;color:var(--text-2);transition:var(--ease);
}
.tag:hover{border-color:rgba(18,226,155,.5);color:var(--brand-300);transform:translateY(-1px);}

.post-nav{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin-top:32px;}
.post-nav-card{
  display:block;padding:20px 22px;border-radius:var(--radius-md);
  background:var(--ink-700);border:1px solid var(--line);transition:var(--ease);
}
.post-nav-card:hover{transform:translateY(-3px);border-color:rgba(18,226,155,.4);box-shadow:var(--shadow-card);}
.post-nav-card .pn-label{display:block;font-size:12px;color:var(--brand-300);letter-spacing:.08em;margin-bottom:8px;}
.post-nav-card .pn-title{display:block;font-size:17px;font-weight:700;color:var(--text-1);margin-bottom:6px;}
.post-nav-card .pn-desc{display:block;font-size:13px;color:var(--text-3);line-height:1.6;}

.section-block{padding:72px 0 0;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:28px;}
.section-title{margin:0;font-size:26px;font-weight:700;letter-spacing:-.01em;color:var(--text-1);}
.section-sub{margin:8px 0 0;font-size:14px;color:var(--text-3);}
.rel-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.card{
  display:flex;flex-direction:column;border-radius:var(--radius-md);overflow:hidden;
  background:var(--ink-700);border:1px solid var(--line);transition:var(--ease);
}
.card:hover{transform:translateY(-4px);border-color:rgba(18,226,155,.4);box-shadow:var(--shadow-card);}
.card-media{position:relative;overflow:hidden;}
.card-media img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:var(--ease);}
.card:hover .card-media img{transform:scale(1.04);}
.card-badge{
  position:absolute;left:12px;top:12px;height:24px;padding:0 10px;border-radius:999px;
  background:rgba(10,13,20,.86);color:var(--brand-300);font-size:12px;font-weight:600;
  display:inline-flex;align-items:center;
}
.card-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.card-title{font-size:17px;font-weight:700;line-height:1.5;color:var(--text-1);}
.card-text{font-size:14px;line-height:1.7;color:var(--text-2);margin:0;}
.card-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--text-3);}
.card-foot i{color:var(--brand-500);transition:var(--ease);}
.card:hover .card-foot i{transform:translateX(4px);}

/* ============ 侧栏 ============ */
.side-rail{position:sticky;top:96px;display:flex;flex-direction:column;gap:20px;}
.rail-box{
  padding:22px;border-radius:var(--radius-md);
  background:var(--ink-800);border:1px solid var(--line);
}
.rail-title{
  display:flex;align-items:center;gap:8px;margin:0 0 14px;
  font-size:14px;font-weight:700;color:var(--text-1);letter-spacing:.04em;
}
.rail-title i{color:var(--brand-500);font-size:13px;}
.toc-link{
  display:block;padding:8px 10px;border-left:2px solid transparent;border-radius:0 8px 8px 0;
  font-size:14px;color:var(--text-2);line-height:1.6;transition:var(--ease);
}
.toc-link:hover{color:var(--brand-300);background:rgba(18,226,155,.07);border-left-color:var(--brand-500);}
.rail-links{display:flex;flex-direction:column;gap:2px;}
.rail-links a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:11px 12px;border-radius:10px;font-size:14px;color:var(--text-2);transition:var(--ease);
}
.rail-links a:hover{background:var(--ink-700);color:var(--brand-300);}
.rail-links a i{font-size:12px;color:var(--text-3);}
.rail-cta{
  padding:24px;border-radius:var(--radius-md);text-align:center;
  background:linear-gradient(160deg, rgba(18,226,155,.16), rgba(108,77,246,.16)), var(--ink-800);
  border:1px solid rgba(18,226,155,.28);
}
.rail-cta h3{margin:0 0 8px;font-size:17px;font-weight:700;color:var(--text-1);}
.rail-cta p{margin:0 0 18px;font-size:13px;color:var(--text-2);line-height:1.7;}
.rail-cta .btn{width:100%;}

/* ============ CTA 带 ============ */
.cta-band{
  position:relative;overflow:hidden;margin-top:88px;padding:72px 0;
  background:var(--ink-800);border-top:1px solid var(--line);
}
.cta-band::before{
  content:"";position:absolute;inset:-40%;pointer-events:none;
  background:repeating-linear-gradient(8deg, rgba(255,255,255,.035) 0 10px, transparent 10px 24px);
}
.cta-inner{position:relative;text-align:center;max-width:720px;margin:0 auto;}
.cta-inner h2{margin:0 0 14px;font-size:30px;line-height:1.25;font-weight:800;letter-spacing:-.01em;color:var(--text-1);}
.cta-inner p{margin:0 0 28px;font-size:16px;color:var(--text-2);}
.cta-actions{display:flex;align-items:center;justify-content:center;gap:18px;flex-wrap:wrap;}

/* ============ 页脚 ============ */
.site-footer{margin-top:0;background:var(--ink-900);border-top:1px solid var(--line);padding:64px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.3fr;gap:40px;padding-bottom:48px;}
.footer-brand .brand-mark{font-size:22px;}
.brand-sub{font-size:11px;color:var(--text-3);letter-spacing:.28em;}
.footer-desc{margin:16px 0 20px;font-size:14px;line-height:1.75;color:var(--text-3);max-width:300px;}
.footer-social{display:flex;gap:10px;}
.footer-social span{
  display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;
  border-radius:10px;border:1px solid var(--line);background:var(--ink-800);
  font-size:13px;color:var(--text-3);
}
.footer-title{margin:0 0 18px;font-size:14px;font-weight:700;color:var(--text-1);letter-spacing:.04em;}
.footer-links li{margin-bottom:12px;}
.footer-links a{font-size:14px;color:var(--text-3);transition:var(--ease);}
.footer-links a:hover{color:var(--brand-500);}
.footer-info li{font-size:14px;color:var(--text-3);margin-bottom:12px;line-height:1.7;}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:22px 0 28px;border-top:1px solid var(--line);
  font-size:13px;color:var(--text-3);
}

/* ============ 响应式 ============ */
@media (max-width:1280px){
  .article-layout{grid-template-columns:minmax(0,760px);}
  .side-rail{display:none;}
}
@media (max-width:1024px){
  .container{padding:0 24px;}
  .nav-toggle{display:inline-flex;}
  .nav-links{
    position:fixed;left:0;right:0;top:68px;
    flex-direction:column;align-items:stretch;gap:4px;margin:0;
    padding:16px 24px 26px;
    background:var(--ink-800);border-bottom:1px solid var(--line);
    box-shadow:0 24px 48px rgba(0,0,0,.55);
    opacity:0;transform:translateY(-10px);pointer-events:none;
    transition:var(--ease);
  }
  .site-nav.open .nav-links{opacity:1;transform:translateY(0);pointer-events:auto;}
  .nav-link{padding:12px 4px;font-size:16px;border-bottom:1px solid var(--line);}
  .nav-link::after{display:none;}
  .nav-actions .btn-primary{height:44px;padding:0 18px;font-size:14px;}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px;}
  .article-title{font-size:32px;}
  .article-hero{padding:28px 0 64px;}
  .rel-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .cta-band{padding:56px 0;margin-top:64px;}
  .cta-inner h2{font-size:25px;}
}
@media (max-width:768px){
  .article-title{font-size:28px;}
  .article-body{font-size:16px;}
  .article-body h2{font-size:22px;}
  .article-body h3{font-size:18px;}
  .section-title{font-size:22px;}
  .section-head{flex-direction:column;align-items:flex-start;}
  .post-nav{grid-template-columns:minmax(0,1fr);}
  .rel-grid{grid-template-columns:minmax(0,1fr);}
  .cta-actions .btn{width:100%;}
}
@media (max-width:520px){
  .container{padding:0 20px;}
  .brand-sub{display:none;}
  .nav-actions .btn-primary{padding:0 14px;font-size:13px;}
  .footer-grid{grid-template-columns:minmax(0,1fr);}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .meta-row{gap:6px 14px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition-duration:.01ms !important;animation-duration:.01ms !important;}
}

/* roulang page: category1 */
:root{
  --ink-900:#0A0D14;
  --ink-800:#111726;
  --ink-700:#182030;
  --ink-600:#1F2A3D;
  --line:rgba(255,255,255,.08);
  --text-1:#EEF3FB;
  --text-2:#A7B3C8;
  --text-3:#6D7C93;
  --brand-500:#12E29B;
  --brand-600:#0BB87D;
  --brand-300:#6BF3C6;
  --violet-500:#6C4DF6;
  --violet-600:#5233DB;
  --amber-400:#FFB13D;
  --danger:#FF5C7A;
  --paper:#F4F6FB;
  --r-sm:8px;
  --r-card:16px;
  --r-lg:20px;
  --r-btn:12px;
  --shadow-card:0 18px 40px rgba(0,0,0,.45);
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--text-1);
  font-family:"PingFang SC","HarmonyOS Sans","MiSans","Source Han Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font:inherit;color:inherit;background:none;border:none;cursor:pointer;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
:focus-visible{outline:2px solid var(--brand-300);outline-offset:2px;}
.container{max-width:1200px;margin:0 auto;padding:0 32px;}
.num{font-variant-numeric:tabular-nums;font-weight:700;}

/* 顶部公告条 */
.notice-bar{background:var(--ink-800);border-bottom:1px solid var(--line);font-size:13px;}
.notice-inner{display:flex;align-items:center;gap:10px;height:40px;overflow:hidden;}
.notice-dot{width:8px;height:8px;border-radius:50%;background:var(--brand-500);box-shadow:0 0 0 4px rgba(18,226,155,.14);flex:none;}
.notice-text{color:var(--text-2);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.notice-text strong{color:var(--brand-300);font-variant-numeric:tabular-nums;}
.notice-close{margin-left:auto;color:var(--text-3);font-size:16px;line-height:1;padding:6px 8px;border-radius:8px;transition:color 180ms var(--ease),background 180ms var(--ease);}
.notice-close:hover{color:var(--text-1);background:rgba(255,255,255,.06);}

/* 导航 */
.site-header{position:sticky;top:0;z-index:60;background:rgba(10,13,20,.94);border-bottom:1px solid var(--line);}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:68px;gap:24px;}
.brand{display:flex;align-items:baseline;gap:8px;}
.brand-mark{font-size:19px;font-weight:800;letter-spacing:-.01em;}
.brand-mark em{color:var(--brand-500);font-style:normal;}
.brand-sub{font-size:11px;color:var(--text-3);letter-spacing:.16em;border:1px solid var(--line);border-radius:999px;padding:2px 8px;}
.nav-links{display:flex;align-items:center;gap:4px;}
.nav-link{display:inline-block;padding:8px 14px;border-radius:999px;font-size:15px;color:var(--text-2);transition:color 180ms var(--ease),background 180ms var(--ease);}
.nav-link:hover{color:var(--text-1);background:rgba(255,255,255,.06);}
.nav-link.active{color:var(--brand-300);background:rgba(18,226,155,.12);}
.nav-actions{display:flex;align-items:center;gap:12px;}
.nav-toggle{display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:var(--r-btn);color:var(--text-1);font-size:18px;line-height:1;}
.nav-toggle:hover{border-color:rgba(18,226,155,.4);color:var(--brand-300);}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:44px;padding:0 24px;border-radius:999px;font-size:15px;font-weight:600;transition:transform 180ms var(--ease),background 180ms var(--ease),border-color 180ms var(--ease),color 180ms var(--ease),box-shadow 180ms var(--ease);}
.btn-primary{background:var(--brand-500);color:#04160F;box-shadow:0 10px 30px rgba(18,226,155,.28);}
.btn-primary:hover{background:var(--brand-300);transform:translateY(-1px);}
.btn-primary:active{background:var(--brand-600);transform:translateY(0);}
.btn-ghost{border:1px solid var(--line);color:var(--text-1);}
.btn-ghost:hover{border-color:rgba(18,226,155,.45);color:var(--brand-300);transform:translateY(-1px);}
.btn-sm{height:38px;padding:0 18px;font-size:14px;border-radius:var(--r-btn);}
.btn-block{width:100%;}

/* 面包屑 */
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-3);flex-wrap:wrap;}
.crumb a{transition:color 180ms var(--ease);}
.crumb a:hover{color:var(--brand-300);}
.crumb .sep{color:var(--brand-500);}

/* 分类 Hero */
.cat-hero{
  position:relative;
  padding:48px 0 80px;
  background-image:radial-gradient(720px 340px at 12% 0%,rgba(18,226,155,.13),transparent 68%),radial-gradient(560px 300px at 92% 10%,rgba(108,77,246,.16),transparent 70%);
  overflow:hidden;
}
.cat-hero::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:32px 32px;
  mask-image:linear-gradient(180deg,rgba(0,0,0,.9),transparent 78%);
  pointer-events:none;
}
.cat-hero .container{position:relative;z-index:1;}
.cat-grid{display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center;margin-top:28px;}
.cat-badge{display:inline-flex;align-items:center;gap:8px;font-size:12px;color:var(--brand-300);background:rgba(18,226,155,.12);border:1px solid rgba(18,226,155,.24);border-radius:999px;padding:4px 12px;}
.cat-badge i{width:6px;height:6px;border-radius:50%;background:var(--brand-500);display:inline-block;}
h1{font-size:40px;line-height:1.2;font-weight:800;letter-spacing:-.01em;margin:18px 0 16px;}
.lead{font-size:17px;color:var(--text-1);max-width:620px;}
.cat-intro{margin-top:18px;font-size:15px;line-height:1.9;color:var(--text-2);max-width:660px;}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px;}
.hero-media{position:relative;border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow-card);}
.hero-media img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.media-card{position:absolute;right:16px;bottom:16px;background:var(--ink-700);border:1px solid var(--line);border-radius:var(--r-card);padding:14px 16px;display:flex;align-items:center;gap:12px;max-width:78%;}
.media-tag{font-size:11px;font-weight:700;color:#241500;background:var(--amber-400);border-radius:999px;padding:2px 9px;flex:none;}
.media-card p{font-size:13px;color:var(--text-2);line-height:1.5;}
.media-card .arrow{color:var(--brand-500);font-size:15px;}

/* 概览条 */
.overview{margin-top:36px;background:var(--ink-800);border:1px solid var(--line);border-radius:var(--r-lg);padding:22px 26px;display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.ov-item{border-left:3px solid rgba(18,226,155,.35);padding-left:16px;}
.ov-item:first-child{border-left-color:var(--brand-500);}
.ov-label{font-size:12px;color:var(--text-3);letter-spacing:.08em;}
.ov-value{font-size:20px;margin-top:4px;font-variant-numeric:tabular-nums;font-weight:700;}
.ov-value small{font-size:13px;color:var(--text-2);font-weight:400;}

/* 通用板块 */
.section{padding:88px 0;border-top:1px solid var(--line);}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px;flex-wrap:wrap;}
h2{font-size:30px;line-height:1.25;font-weight:700;letter-spacing:-.01em;}
.section-sub{margin-top:10px;font-size:15px;color:var(--text-2);max-width:640px;}
.text-link{color:var(--brand-500);font-size:14px;font-weight:600;display:inline-flex;align-items:center;gap:6px;transition:gap 180ms var(--ease),color 180ms var(--ease);}
.text-link:hover{gap:10px;color:var(--brand-300);}

/* 时间轴列表 */
.timeline-head{display:grid;grid-template-columns:180px 1fr 40px;gap:24px;padding:0 0 12px;border-bottom:1px solid var(--line);font-size:12px;color:var(--text-3);letter-spacing:.1em;}
.tl-row{display:grid;grid-template-columns:180px 1fr 40px;gap:24px;align-items:center;padding:24px 0;border-bottom:1px solid var(--line);transition:background 180ms var(--ease);}
.tl-row:hover{background:rgba(255,255,255,.022);}
.tl-ver{font-size:18px;color:var(--brand-300);font-variant-numeric:tabular-nums;font-weight:700;}
.tl-date{font-size:13px;color:var(--text-3);font-variant-numeric:tabular-nums;display:block;margin-top:2px;}
.tl-title{font-size:17px;font-weight:600;}
.tl-desc{font-size:14px;color:var(--text-2);margin-top:4px;}
.tl-arrow{justify-self:end;color:var(--text-3);font-size:18px;transition:transform 180ms var(--ease),color 180ms var(--ease);}
.tl-row:hover .tl-arrow{color:var(--brand-500);transform:translateX(4px);}

/* 卡片网格 */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
.card{background:var(--ink-700);border:1px solid var(--line);border-radius:var(--r-card);padding:26px;transition:transform 180ms var(--ease),box-shadow 180ms var(--ease),border-color 180ms var(--ease);}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-card);border-color:rgba(18,226,155,.4);}
.card-icon{width:44px;height:44px;border-radius:var(--r-btn);display:flex;align-items:center;justify-content:center;font-size:18px;background:rgba(18,226,155,.12);border:1px solid rgba(18,226,155,.28);color:var(--brand-300);margin-bottom:16px;font-variant-numeric:tabular-nums;font-weight:700;}
.card h3{font-size:22px;line-height:1.35;font-weight:700;margin-bottom:10px;}
.card p{font-size:15px;color:var(--text-2);}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px;}
.tag{font-size:12px;color:var(--brand-300);background:rgba(18,226,155,.12);border-radius:999px;padding:3px 11px;}
.tag-violet{color:#CFC4FF;background:rgba(108,77,246,.24);}

/* 适用场景 */
.scene-list{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;}
.scene-item{display:flex;gap:16px;background:var(--ink-800);border:1px solid var(--line);border-radius:var(--r-card);padding:20px 22px;transition:border-color 180ms var(--ease),transform 180ms var(--ease);}
.scene-item:hover{border-color:rgba(18,226,155,.4);transform:translateY(-3px);}
.scene-num{font-size:14px;font-weight:700;color:var(--brand-500);font-variant-numeric:tabular-nums;border:1px solid rgba(18,226,155,.3);border-radius:var(--r-sm);height:28px;min-width:34px;display:flex;align-items:center;justify-content:center;flex:none;}
.scene-item h3{font-size:17px;font-weight:600;margin-bottom:6px;}
.scene-item p{font-size:14px;color:var(--text-2);}

/* 流程 */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;position:relative;}
.step{background:var(--ink-800);border:1px solid var(--line);border-radius:var(--r-card);padding:28px;position:relative;}
.step-num{font-size:34px;font-weight:800;color:rgba(18,226,155,.9);font-variant-numeric:tabular-nums;letter-spacing:-.02em;line-height:1;}
.step h3{font-size:19px;font-weight:700;margin:14px 0 8px;}
.step p{font-size:14px;color:var(--text-2);}

/* FAQ */
.faq-wrap{max-width:860px;margin:0 auto;}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;text-align:left;padding:22px 0 22px 16px;font-size:17px;font-weight:700;color:var(--text-1);position:relative;transition:color 180ms var(--ease);}
.faq-q:hover{color:var(--brand-300);}
.faq-item.open .faq-q{color:var(--brand-300);}
.faq-item.open .faq-q::before{content:"";position:absolute;left:0;top:18px;bottom:18px;width:3px;border-radius:2px;background:var(--brand-500);}
.faq-sign{flex:none;width:26px;height:26px;border-radius:50%;border:1px solid var(--line);display:flex;align-items:center;justify-content:center;font-size:15px;color:var(--brand-300);transition:transform 180ms var(--ease);}
.faq-item.open .faq-sign{transform:rotate(45deg);}
.faq-a{display:none;padding:0 0 24px 16px;font-size:15px;line-height:1.85;color:var(--text-2);}
.faq-item.open .faq-a{display:block;}

/* 分页位 */
.pagination{display:flex;align-items:center;justify-content:center;gap:10px;margin-top:44px;flex-wrap:wrap;}
.page-pill{min-width:44px;height:44px;padding:0 14px;border:1px solid var(--line);border-radius:var(--r-btn);display:inline-flex;align-items:center;justify-content:center;font-size:14px;color:var(--text-2);font-variant-numeric:tabular-nums;transition:border-color 180ms var(--ease),color 180ms var(--ease),background 180ms var(--ease);}
.page-pill:hover{border-color:rgba(18,226,155,.45);color:var(--brand-300);}
.page-pill.current{background:var(--brand-500);border-color:transparent;color:#04160F;font-weight:700;}
.pagination-label{font-size:13px;color:var(--text-3);margin-right:6px;}

/* CTA 带 */
.cta-band{position:relative;background:var(--ink-800);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:72px 0;text-align:center;overflow:hidden;}
.cta-band::before{content:"";position:absolute;inset:-40%;background:repeating-linear-gradient(8deg,rgba(18,226,155,.07) 0 2px,transparent 2px 14px);pointer-events:none;}
.cta-band .container{position:relative;z-index:1;}
.cta-band h2{font-size:30px;}
.cta-band p{margin:14px auto 28px;font-size:15px;color:var(--text-2);max-width:600px;}
.cta-actions{display:flex;align-items:center;justify-content:center;gap:18px;flex-wrap:wrap;}

/* 页脚 */
.site-footer{background:var(--ink-900);border-top:1px solid var(--line);padding:64px 0 28px;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:36px;}
.footer-brand .brand-mark{font-size:19px;font-weight:800;}
.footer-brand .brand-mark em{color:var(--brand-500);font-style:normal;}
.footer-brand .brand-sub{font-size:11px;color:var(--text-3);letter-spacing:.16em;margin-top:6px;}
.footer-desc{margin-top:14px;font-size:14px;color:var(--text-3);max-width:280px;}
.footer-social{display:flex;gap:10px;margin-top:18px;}
.footer-social span{width:32px;height:32px;border-radius:var(--r-sm);border:1px solid var(--line);display:flex;align-items:center;justify-content:center;font-size:12px;color:var(--text-3);}
.footer-title{font-size:14px;color:var(--text-1);font-weight:700;margin-bottom:16px;}
.footer-links li,.footer-info li{margin-bottom:10px;}
.footer-links a{font-size:14px;color:var(--text-3);transition:color 180ms var(--ease);}
.footer-links a:hover{color:var(--brand-500);}
.footer-info li{font-size:13px;color:var(--text-3);}
.footer-bottom{margin-top:44px;padding-top:22px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:var(--text-3);}

@media (prefers-reduced-motion: reduce){
  *{transition:opacity 180ms linear !important;animation:none !important;}
  .card:hover,.scene-item:hover,.btn:hover{transform:none;}
}

@media (max-width:1024px){
  .container{padding:0 24px;}
  h1{font-size:32px;}
  h2{font-size:25px;}
  .cat-grid{grid-template-columns:1fr;gap:32px;}
  .cat-hero{padding:36px 0 60px;}
  .hero-media{order:2;}
  .nav-links{display:none;}
  .nav-links.open{
    display:flex;flex-direction:column;align-items:stretch;gap:6px;
    position:absolute;top:100%;left:0;right:0;
    background:var(--ink-800);border-bottom:1px solid var(--line);
    padding:16px 24px 22px;
  }
  .nav-links.open .nav-link{padding:12px 14px;font-size:16px;}
  .nav-toggle{display:flex;align-items:center;justify-content:center;}
  .overview{grid-template-columns:repeat(2,1fr);}
  .grid-3{grid-template-columns:repeat(2,1fr);}
  .steps{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:repeat(2,1fr);}
  .section{padding:72px 0;}
}
@media (max-width:768px){
  .tl-row,.timeline-head{grid-template-columns:1fr;gap:8px;}
  .timeline-head{display:none;}
  .tl-arrow{justify-self:start;}
  .grid-2,.scene-list{grid-template-columns:1fr;}
  .cta-band h2{font-size:24px;}
  .section{padding:56px 0;}
  h1{font-size:28px;}
  h2{font-size:23px;}
}
@media (max-width:560px){
  .container{padding:0 20px;}
  .overview{grid-template-columns:1fr;padding:20px;}
  .grid-3{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
  .brand-sub{display:none;}
  .hero-cta .btn{width:100%;}
  .cta-actions{flex-direction:column;}
  .cta-actions .btn{width:100%;}
  .footer-bottom{flex-direction:column;}
}

/* roulang page: category3 */
:root{
  --ink-900:#0A0D14;
  --ink-800:#111726;
  --ink-700:#182030;
  --ink-600:#1F2A3D;
  --line:rgba(255,255,255,.08);
  --text-1:#EEF3FB;
  --text-2:#A7B3C8;
  --text-3:#6D7C93;
  --brand-500:#12E29B;
  --brand-600:#0BB87D;
  --brand-300:#6BF3C6;
  --violet-500:#6C4DF6;
  --violet-600:#5233DB;
  --amber-400:#FFB13D;
  --danger:#FF5C7A;
  --paper:#F4F6FB;
  --paper-card:#FFFFFF;
  --paper-text:#10141C;
  --paper-sub:#5A6577;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:16px;
  --r-xl:20px;
  --shadow-card:0 18px 40px rgba(0,0,0,.45);
  --shadow-btn:0 10px 30px rgba(18,226,155,.28);
  --ease:cubic-bezier(.2,.7,.3,1);
  --dur:180ms;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  min-height:100%;
  font-family:"PingFang SC","HarmonyOS Sans","MiSans","Source Han Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text-1);
  background-color:var(--ink-900);
  background-image:
    radial-gradient(900px 520px at 10% -12%, rgba(18,226,155,.10), transparent 62%),
    radial-gradient(720px 520px at 94% 4%, rgba(108,77,246,.12), transparent 64%),
    linear-gradient(rgba(255,255,255,.026) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.026) 1px, transparent 1px);
  background-size:auto,auto,32px 32px,32px 32px;
  background-attachment:fixed,fixed,scroll,scroll;
}
img{max-width:100%;display:block;border-style:none;}
a{color:inherit;text-decoration:none;transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
.num{font-variant-numeric:tabular-nums;font-weight:800;}
:focus-visible{outline:2px solid var(--brand-300);outline-offset:2px;border-radius:6px;}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px;}
.section{padding:88px 0;}
.section-tight{padding:64px 0;}
.divider{height:1px;background:var(--line);border:0;margin:0;}

.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--brand-300);font-weight:700;
}
.eyebrow::before{content:"";width:18px;height:2px;background:var(--brand-500);display:block;border-radius:2px;}
h1{font-size:40px;line-height:1.2;font-weight:800;letter-spacing:-.01em;}
h2{font-size:30px;line-height:1.25;font-weight:700;letter-spacing:-.01em;}
h3{font-size:22px;line-height:1.35;font-weight:700;}
.lead{font-size:17px;line-height:1.8;color:var(--text-2);}
.sub{font-size:16px;color:var(--text-2);}
.small{font-size:14px;color:var(--text-3);}
.micro{font-size:12px;color:var(--text-3);}

/* ============ 导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(10,13,20,.86);
  border-bottom:1px solid var(--line);
  backdrop-filter:saturate(140%);
}
.site-nav{display:flex;align-items:center;}
.nav-inner{
  display:flex;align-items:center;gap:32px;
  height:68px;width:100%;max-width:1200px;margin:0 auto;padding:0 32px;
}
.brand{display:flex;align-items:baseline;gap:8px;flex:0 0 auto;}
.brand-mark{font-size:20px;font-weight:800;color:var(--text-1);letter-spacing:.01em;}
.brand-mark em{font-style:normal;color:var(--brand-500);}
.brand-sub{
  font-size:12px;color:var(--text-3);letter-spacing:.08em;
  border-left:1px solid var(--line);padding-left:8px;
}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:auto;}
.nav-link{
  display:inline-flex;align-items:center;
  padding:8px 14px;border-radius:var(--r-md);
  font-size:15px;color:var(--text-2);
  border:1px solid transparent;
}
.nav-link:hover{color:var(--text-1);background:rgba(255,255,255,.05);}
.nav-link.active{color:var(--brand-300);background:rgba(18,226,155,.10);border-color:rgba(18,226,155,.28);font-weight:700;}
.nav-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.nav-toggle{
  display:none;width:44px;height:44px;line-height:1;
  border:1px solid var(--line);border-radius:var(--r-md);
  color:var(--text-1);font-size:18px;
  transition:border-color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.nav-toggle:hover{border-color:rgba(18,226,155,.5);background:rgba(18,226,155,.08);}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 24px;border-radius:999px;
  font-size:15px;font-weight:700;white-space:nowrap;
  transition:transform var(--dur) var(--ease),background var(--dur) var(--ease),
             box-shadow var(--dur) var(--ease),border-color var(--dur) var(--ease),color var(--dur) var(--ease);
}
.btn-primary{background:var(--brand-500);color:#04170F;box-shadow:var(--shadow-btn);}
.btn-primary:hover{background:var(--brand-300);transform:translateY(-1px);}
.btn-ghost{background:transparent;color:var(--text-1);border:1px solid var(--line);}
.btn-ghost:hover{border-color:var(--brand-500);color:var(--brand-300);transform:translateY(-1px);}
.btn-sm{height:36px;padding:0 16px;font-size:14px;border-radius:var(--r-md);}
.link-more{color:var(--brand-300);font-size:14px;font-weight:700;display:inline-flex;align-items:center;gap:6px;}
.link-more::after{content:"→";transition:transform var(--dur) var(--ease);}
.link-more:hover::after{transform:translateX(4px);}

/* ============ 面包屑 ============ */
.crumb{padding:24px 0 0;}
.crumb-list{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-3);}
.crumb-list a:hover{color:var(--brand-300);}
.crumb-sep{color:var(--brand-500);}
.crumb-current{color:var(--text-2);}

/* ============ Hero ============ */
.hero{padding:40px 0 88px;}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center;}
.hero-copy h1{margin:16px 0 16px;max-width:14em;}
.hero-copy .lead{max-width:32em;}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px;}
.hero-stats{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
  gap:20px;margin-top:40px;padding-top:28px;border-top:1px solid var(--line);
}
.stat-num{font-size:26px;color:var(--text-1);font-variant-numeric:tabular-nums;font-weight:800;}
.stat-num span{color:var(--brand-500);}
.stat-cap{font-size:12px;color:var(--text-3);margin-top:6px;letter-spacing:.04em;}
.hero-visual{position:relative;border-radius:var(--r-xl);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow-card);}
.hero-visual img{width:100%;aspect-ratio:16/11;object-fit:cover;}
.hero-float{
  position:absolute;right:16px;bottom:16px;left:auto;max-width:280px;
  background:var(--ink-700);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:16px 18px;
}
.hero-float .pill{
  display:inline-block;font-size:12px;font-weight:700;letter-spacing:.06em;
  color:var(--amber-400);background:rgba(255,177,61,.12);
  border:1px solid rgba(255,177,61,.28);border-radius:999px;padding:2px 10px;margin-bottom:8px;
}
.hero-float p{font-size:14px;color:var(--text-2);line-height:1.6;}

/* ============ 区块标题 ============ */
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;}
.section-head h2{margin-top:12px;}
.section-head .sub{margin-top:12px;max-width:46em;}

/* ============ 筛选胶囊 ============ */
.filter-bar{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:32px;}
.filter-pill{
  padding:9px 18px;border-radius:999px;font-size:14px;font-weight:700;
  color:var(--text-2);border:1px solid var(--line);background:var(--ink-800);
  transition:all var(--dur) var(--ease);
}
.filter-pill:hover{color:var(--text-1);border-color:rgba(18,226,155,.45);}
.filter-pill.is-active{background:var(--brand-500);border-color:var(--brand-500);color:#04170F;box-shadow:var(--shadow-btn);}

/* ============ 玩法卡片网格 ============ */
.feat-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.feat-card{
  background:var(--ink-700);border:1px solid var(--line);border-radius:var(--r-lg);
  overflow:hidden;display:flex;flex-direction:column;
  transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.feat-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-card);border-color:rgba(18,226,155,.4);}
.feat-media{position:relative;overflow:hidden;}
.feat-media img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform 400ms var(--ease);}
.feat-card:hover .feat-media img{transform:scale(1.04);}
.feat-icon{
  width:40px;height:40px;border-radius:var(--r-md);
  display:flex;align-items:center;justify-content:center;
  background:rgba(108,77,246,.16);border:1px solid rgba(108,77,246,.4);
  color:var(--brand-300);font-size:16px;font-weight:800;
  position:absolute;left:16px;bottom:-20px;z-index:2;
}
.feat-body{padding:32px 24px 24px;display:flex;flex-direction:column;gap:10px;flex:1;}
.badge{
  align-self:flex-start;font-size:12px;font-weight:700;
  color:var(--brand-300);background:rgba(18,226,155,.12);
  border-radius:999px;padding:3px 10px;letter-spacing:.04em;
}
.feat-body h3{font-size:19px;}
.feat-body p{font-size:15px;color:var(--text-2);line-height:1.7;}
.feat-meta{margin-top:auto;padding-top:14px;border-top:1px solid var(--line);display:flex;justify-content:space-between;font-size:12px;color:var(--text-3);font-variant-numeric:tabular-nums;}

/* ============ 图文两栏 ============ */
.split{display:grid;grid-template-columns:5fr 7fr;gap:48px;align-items:center;}
.split-media{border-radius:var(--r-xl);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow-card);}
.split-media img{width:100%;aspect-ratio:4/3;object-fit:cover;}
.tip-list{margin-top:24px;display:flex;flex-direction:column;gap:16px;}
.tip-list li{
  display:flex;gap:14px;padding:16px 18px;
  background:var(--ink-800);border:1px solid var(--line);border-radius:var(--r-lg);
}
.tip-index{
  flex:0 0 auto;width:28px;height:28px;border-radius:50%;
  background:rgba(18,226,155,.14);color:var(--brand-300);
  display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:800;
  font-variant-numeric:tabular-nums;
}
.tip-list strong{display:block;font-size:15px;color:var(--text-1);margin-bottom:2px;}
.tip-list p{font-size:14px;color:var(--text-2);line-height:1.7;}

/* ============ 浅色反转区 ============ */
.paper-section{
  background:var(--paper);color:var(--paper-text);
  padding:88px 0;
}
.paper-section h2{color:var(--paper-text);}
.paper-section .eyebrow{color:#0E9C6D;}
.paper-section .sub{color:var(--paper-sub);}
.step-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;margin-top:40px;position:relative;}
.step-card{
  background:var(--paper-card);border-radius:var(--r-lg);padding:28px 24px;
  box-shadow:0 12px 30px rgba(16,20,28,.10);border:1px solid rgba(16,20,28,.06);
  transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.step-card:hover{transform:translateY(-4px);box-shadow:0 20px 40px rgba(16,20,28,.16);}
.step-num{
  font-size:44px;font-weight:800;line-height:1;letter-spacing:-.02em;
  font-variant-numeric:tabular-nums;color:#12E29B;
  -webkit-text-stroke:0;
}
.step-card h3{margin:16px 0 8px;font-size:19px;color:var(--paper-text);}
.step-card p{font-size:14px;color:var(--paper-sub);line-height:1.7;}

/* ============ 场景路径卡 ============ */
.path-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.path-card{
  background:var(--ink-800);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:28px 24px;display:flex;flex-direction:column;gap:12px;
  transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.path-card:hover{transform:translateY(-4px);border-color:rgba(108,77,246,.55);box-shadow:var(--shadow-card);}
.path-tag{
  align-self:flex-start;font-size:12px;font-weight:700;letter-spacing:.05em;
  color:#C9BCFF;background:rgba(108,77,246,.18);
  border:1px solid rgba(108,77,246,.42);border-radius:999px;padding:3px 10px;
}
.path-card h3{font-size:19px;}
.path-card p{font-size:15px;color:var(--text-2);line-height:1.7;}
.path-card .path-step{font-size:13px;color:var(--text-3);margin-top:auto;padding-top:14px;border-top:1px solid var(--line);}

/* ============ 数据条 ============ */
.data-strip{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1px;
  background:var(--line);border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;
}
.data-item{background:var(--ink-800);padding:26px 22px;}
.data-item .num{font-size:26px;color:var(--brand-300);}
.data-item .cap{font-size:13px;color:var(--text-3);margin-top:6px;}

/* ============ FAQ ============ */
.faq-wrap{max-width:860px;margin:0 auto;}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 0;text-align:left;font-size:17px;font-weight:700;color:var(--text-1);
  transition:color var(--dur) var(--ease);
}
.faq-q:hover{color:var(--brand-300);}
.faq-icon{
  flex:0 0 auto;width:24px;height:24px;border-radius:6px;
  display:flex;align-items:center;justify-content:center;
  border:1px solid var(--line);color:var(--text-2);font-size:15px;line-height:1;
  transition:transform var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.faq-item.is-open .faq-icon{transform:rotate(45deg);color:var(--brand-500);border-color:rgba(18,226,155,.5);}
.faq-a{max-height:0;overflow:hidden;transition:max-height 260ms var(--ease);}
.faq-a p{
  font-size:15px;line-height:1.8;color:var(--text-2);
  padding:0 0 22px;border-left:3px solid transparent;
}
.faq-item.is-open .faq-a p{border-left:3px solid var(--brand-500);padding-left:16px;}

/* ============ CTA 带 ============ */
.cta-band{
  position:relative;overflow:hidden;
  background:var(--ink-800);border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  padding:72px 0;text-align:center;
}
.cta-band::before{
  content:"";position:absolute;inset:-40% -10%;
  background:repeating-linear-gradient(98deg, rgba(18,226,155,.07) 0 14px, transparent 14px 40px);
  pointer-events:none;
}
.cta-inner{position:relative;z-index:1;max-width:720px;margin:0 auto;}
.cta-inner h2{margin-bottom:14px;}
.cta-inner .sub{margin-bottom:28px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:16px;justify-content:center;align-items:center;}

/* ============ 相关分类胶囊 ============ */
.chip-row{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-top:28px;}
.chip{
  font-size:14px;font-weight:700;padding:8px 18px;border-radius:999px;
  border:1px solid var(--line);color:var(--text-2);background:var(--ink-800);
  transition:all var(--dur) var(--ease);
}
.chip:hover{color:var(--brand-300);border-color:rgba(18,226,155,.45);}
.chip.is-current{background:var(--brand-500);border-color:var(--brand-500);color:#04170F;}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink-900);border-top:1px solid var(--line);padding:64px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:48px;}
.footer-brand .brand-mark{font-size:22px;}
.footer-desc{font-size:14px;color:var(--text-3);line-height:1.8;margin-top:14px;max-width:26em;}
.footer-social{display:flex;gap:10px;margin-top:18px;}
.footer-social span{
  width:34px;height:34px;border-radius:10px;border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;
  font-size:13px;color:var(--text-3);background:var(--ink-800);
}
.footer-title{font-size:14px;color:var(--text-1);font-weight:700;margin-bottom:16px;}
.footer-links li,.footer-info li{margin-bottom:10px;}
.footer-links a{font-size:14px;color:var(--text-3);}
.footer-links a:hover{color:var(--brand-500);}
.footer-info li{font-size:14px;color:var(--text-3);}
.footer-bottom{
  border-top:1px solid var(--line);padding:20px 0;
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:13px;color:var(--text-3);
}

/* ============ 移动端抽屉 ============ */
.nav-drawer{display:none;}

@media (max-width:1024px){
  .container{padding:0 24px;}
  .nav-inner{height:64px;padding:0 24px;}
  .nav-links,.nav-actions .btn{display:none;}
  .nav-toggle{display:flex;align-items:center;justify-content:center;}
  .nav-drawer{
    display:block;position:fixed;inset:64px 0 0 0;z-index:55;
    background:var(--ink-900);border-top:1px solid var(--line);
    padding:24px;transform:translateY(-8px);opacity:0;pointer-events:none;
    transition:opacity var(--dur) var(--ease),transform var(--dur) var(--ease);
  }
  .nav-drawer.is-open{opacity:1;transform:translateY(0);pointer-events:auto;}
  .nav-drawer ul{display:flex;flex-direction:column;gap:8px;margin-bottom:24px;}
  .nav-drawer a.nav-link{display:flex;padding:14px 16px;font-size:16px;width:100%;}
  .nav-drawer .btn{width:100%;height:48px;}

  .hero{padding:24px 0 72px;}
  .hero-grid{grid-template-columns:1fr;gap:36px;}
  h1{font-size:30px;}
  h2{font-size:24px;}
  h3{font-size:19px;}
  .section{padding:72px 0;}
  .paper-section{padding:72px 0;}
  .feat-grid,.path-grid,.step-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .split{grid-template-columns:1fr;gap:32px;}
  .data-strip{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px;}
}

@media (max-width:640px){
  .container{padding:0 20px;}
  .nav-inner{padding:0 20px;}
  body{font-size:16px;}
  h1{font-size:28px;}
  h2{font-size:23px;}
  h3{font-size:19px;}
  .section,.paper-section{padding:56px 0;}
  .hero-stats{grid-template-columns:1fr;gap:16px;}
  .feat-grid,.path-grid,.step-grid{grid-template-columns:1fr;}
  .data-strip{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .hero-float{position:static;max-width:none;margin:0;border-radius:0;border-left:0;border-right:0;border-bottom:0;}
  .cta-actions .btn{width:100%;}
  .nav-drawer .btn{width:100%;}
}

@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition-property:opacity!important;transition-duration:120ms!important;}
  html{scroll-behavior:auto;}
}

/* roulang page: category2 */
:root{
  --ink-900:#0A0D14;
  --ink-800:#111726;
  --ink-700:#182030;
  --ink-600:#1F2A3D;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --text-1:#EEF3FB;
  --text-2:#A7B3C8;
  --text-3:#6D7C93;
  --brand-500:#12E29B;
  --brand-600:#0BB87D;
  --brand-300:#6BF3C6;
  --violet-500:#6C4DF6;
  --violet-600:#5233DB;
  --amber-400:#FFB13D;
  --danger:#FF5C7A;
  --paper:#F4F6FB;
  --r-s:8px;
  --r-m:12px;
  --r-c:16px;
  --r-l:20px;
  --shadow-card:0 18px 40px rgba(0,0,0,.45);
  --glow:rgba(18,226,155,.28) 0 10px 30px;
  --ease:cubic-bezier(.2,.7,.3,1);
  --dur:180ms;
  --container:1200px;
  --pd:32px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--text-1);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans","MiSans","Source Han Sans SC","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.01em;line-height:1.25;}
p{margin:0;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--brand-300);outline-offset:2px;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 var(--pd);position:relative;z-index:2;}

/* 公告条 */
.notice-bar{background:var(--ink-800);border-bottom:1px solid var(--line);}
.notice-bar.is-hidden{display:none;}
.notice-inner{display:flex;align-items:center;gap:12px;min-height:40px;padding-top:8px;padding-bottom:8px;}
.notice-dot{width:8px;height:8px;border-radius:50%;background:var(--brand-500);box-shadow:0 0 0 4px rgba(18,226,155,.14);flex:none;}
.notice-text{font-size:13px;color:var(--text-2);flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.notice-close{background:transparent;border:1px solid var(--line);color:var(--text-3);width:26px;height:26px;border-radius:8px;font-size:15px;line-height:1;cursor:pointer;transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);}
.notice-close:hover{color:var(--text-1);border-color:var(--line-strong);}

/* 导航 */
.site-nav{position:sticky;top:0;z-index:60;background:transparent;border-bottom:1px solid transparent;transition:background var(--dur) var(--ease),border-color var(--dur) var(--ease);}
.site-nav.is-solid{background:rgba(10,13,20,.96);border-bottom-color:var(--line);}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:68px;}
.brand{display:flex;flex-direction:column;line-height:1.1;flex:none;}
.brand-mark{font-size:20px;font-weight:800;color:var(--text-1);letter-spacing:-.02em;}
.brand-mark em{font-style:normal;color:var(--brand-500);}
.brand-sub{font-size:11px;color:var(--text-3);letter-spacing:.16em;margin-top:3px;}
.nav-links{display:flex;align-items:center;gap:4px;}
.nav-link{display:block;padding:8px 14px;border-radius:999px;font-size:15px;color:var(--text-2);transition:color var(--dur) var(--ease),background var(--dur) var(--ease);}
.nav-link:hover{color:var(--text-1);background:rgba(255,255,255,.06);}
.nav-link.active{color:var(--brand-300);background:rgba(18,226,155,.12);box-shadow:inset 0 -2px 0 var(--brand-500);}
.nav-actions{display:flex;align-items:center;gap:12px;flex:none;}
.nav-toggle{display:none;width:42px;height:42px;border-radius:var(--r-m);border:1px solid var(--line);background:transparent;color:var(--text-1);font-size:20px;line-height:1;cursor:pointer;}
.nav-toggle:hover{border-color:var(--brand-500);color:var(--brand-300);}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:44px;padding:0 24px;border-radius:999px;font-size:15px;font-weight:700;border:1px solid transparent;cursor:pointer;transition:background var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease),transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease);}
.btn-primary{background:var(--brand-500);color:#06231A;}
.btn-primary:hover{background:var(--brand-600);transform:translateY(-1px);box-shadow:var(--glow);}
.btn-ghost{background:transparent;border-color:var(--line-strong);color:var(--text-1);}
.btn-ghost:hover{border-color:var(--brand-500);color:var(--brand-300);transform:translateY(-1px);}
.btn-block{width:100%;}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:700;color:var(--brand-300);transition:gap var(--dur) var(--ease);}
.link-arrow:hover{gap:10px;}

/* 通用板块 */
.section{padding:88px 0;}
.section-tight{padding:64px 0;}
.section-head{max-width:720px;margin-bottom:40px;}
.section-head h2{font-size:30px;margin-bottom:12px;}
.section-head p{color:var(--text-2);font-size:16px;}
.eyebrow{display:inline-block;font-size:12px;letter-spacing:.18em;color:var(--brand-300);text-transform:uppercase;margin-bottom:12px;}

/* 面包屑 */
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-3);margin-bottom:28px;flex-wrap:wrap;}
.breadcrumb a{color:var(--text-3);transition:color var(--dur) var(--ease);}
.breadcrumb a:hover{color:var(--brand-300);}
.breadcrumb .sep{color:var(--brand-500);}
.breadcrumb .current{color:var(--text-2);}

/* Hero */
.cat-hero{position:relative;overflow:hidden;padding:64px 0 72px;border-bottom:1px solid var(--line);}
.cat-hero::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);background-size:32px 32px;-webkit-mask-image:radial-gradient(circle at 18% 12%,#000,transparent 72%);mask-image:radial-gradient(circle at 18% 12%,#000,transparent 72%);pointer-events:none;}
.cat-hero::after{content:"";position:absolute;width:560px;height:560px;right:-140px;top:-200px;background:radial-gradient(circle,rgba(18,226,155,.16),transparent 62%);pointer-events:none;}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center;}
.hero-grid h1{font-size:40px;line-height:1.2;font-weight:800;margin-bottom:18px;}
.hero-lead{font-size:17px;color:var(--text-2);max-width:520px;margin-bottom:28px;}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;}
.hero-media{position:relative;}
.hero-media img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--r-l);border:1px solid var(--line);}
.hero-float{position:absolute;right:16px;bottom:-26px;max-width:300px;background:var(--ink-700);border:1px solid var(--line-strong);border-radius:var(--r-m);padding:16px 18px;box-shadow:var(--shadow-card);}
.hero-float p{font-size:13px;color:var(--text-2);margin-top:8px;line-height:1.6;}
.badge-version{display:inline-block;font-size:12px;font-weight:700;color:var(--amber-400);background:rgba(255,177,61,.12);border:1px solid rgba(255,177,61,.28);padding:3px 10px;border-radius:999px;font-variant-numeric:tabular-nums;}
.stat-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--r-m);overflow:hidden;margin-top:64px;}
.stat-strip li{background:var(--ink-800);padding:18px 20px;display:flex;flex-direction:column;gap:2px;}
.stat-strip strong{font-size:21px;color:var(--brand-300);font-variant-numeric:tabular-nums;font-weight:800;}
.stat-strip span{font-size:12px;color:var(--text-3);}

/* 三步指引条 */
.step-track{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;position:relative;}
.step-track::before{content:"";position:absolute;left:8%;right:8%;top:26px;border-top:1px dashed rgba(255,255,255,.16);}
.step-item{position:relative;z-index:1;display:flex;flex-direction:column;gap:14px;}
.step-num{width:52px;height:52px;border-radius:999px;background:var(--ink-700);border:1px solid var(--line-strong);display:flex;align-items:center;justify-content:center;font-weight:800;color:var(--brand-300);font-variant-numeric:tabular-nums;font-size:16px;}
.step-item h3{font-size:19px;}
.step-item p{font-size:14px;color:var(--text-2);}

/* 安装方式大图文卡 */
.install-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
.install-card{display:flex;flex-direction:column;background:var(--ink-700);border:1px solid var(--line);border-radius:var(--r-c);overflow:hidden;transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);}
.install-card:hover{transform:translateY(-4px);border-color:rgba(18,226,155,.4);box-shadow:var(--shadow-card);}
.install-media{aspect-ratio:16/9;overflow:hidden;}
.install-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease);}
.install-card:hover .install-media img{transform:scale(1.04);}
.install-body{padding:24px;display:flex;flex-direction:column;gap:14px;flex:1;}
.install-body h3{font-size:22px;}
.install-body>p{font-size:15px;color:var(--text-2);}
.tag-row{display:flex;gap:8px;flex-wrap:wrap;}
.tag{font-size:12px;font-weight:700;padding:3px 10px;border-radius:999px;background:rgba(18,226,155,.12);color:var(--brand-300);border:1px solid rgba(18,226,155,.22);}
.tag-violet{background:rgba(108,77,246,.16);color:#C0B2FF;border-color:rgba(108,77,246,.34);}
.check-list{margin-top:auto;display:flex;flex-direction:column;gap:10px;padding-top:14px;border-top:1px solid var(--line);}
.check-list li{display:flex;gap:10px;font-size:14px;color:var(--text-2);}
.check-list li::before{content:"";width:6px;height:6px;border-radius:2px;background:var(--brand-500);margin-top:9px;flex:none;}

/* 检查清单（深色块） */
.prep-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.prep-card{background:var(--ink-800);border:1px solid var(--line);border-radius:var(--r-c);padding:22px;transition:border-color var(--dur) var(--ease),transform var(--dur) var(--ease);}
.prep-card:hover{border-color:rgba(18,226,155,.4);transform:translateY(-4px);}
.prep-card h3{font-size:17px;margin-bottom:8px;}
.prep-card p{font-size:14px;color:var(--text-2);}
.prep-card .prep-num{font-size:12px;letter-spacing:.16em;color:var(--amber-400);font-variant-numeric:tabular-nums;display:block;margin-bottom:10px;}

/* 报错排查 */
.error-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.error-card{background:var(--ink-700);border:1px solid var(--line);border-radius:var(--r-c);padding:24px;display:flex;flex-direction:column;gap:10px;transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);}
.error-card:hover{transform:translateY(-4px);border-color:rgba(18,226,155,.4);box-shadow:var(--shadow-card);}
.error-card h3{font-size:17px;display:flex;align-items:center;gap:8px;}
.error-card h3::before{content:"!";width:22px;height:22px;border-radius:999px;background:rgba(255,92,122,.14);color:var(--danger);font-size:13px;font-weight:800;display:flex;align-items:center;justify-content:center;flex:none;}
.error-card p{font-size:14px;color:var(--text-2);}
.error-card .fix{font-size:14px;color:var(--text-1);border-left:3px solid var(--brand-500);padding-left:12px;}

/* FAQ */
.faq-list{max-width:860px;margin:0 auto;display:flex;flex-direction:column;gap:12px;}
.faq-item{background:var(--ink-800);border:1px solid var(--line);border-radius:var(--r-m);overflow:hidden;transition:border-color var(--dur) var(--ease);}
.faq-item:hover{border-color:var(--line-strong);}
.faq-item.is-open{border-color:rgba(18,226,155,.34);}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 22px;background:transparent;border:0;color:var(--text-1);font-size:17px;font-weight:700;text-align:left;cursor:pointer;}
.faq-icon{color:var(--brand-500);font-size:22px;line-height:1;font-weight:400;transition:transform var(--dur) var(--ease);flex:none;}
.faq-item.is-open .faq-icon{transform:rotate(45deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .28s var(--ease);}
.faq-a-inner{padding:0 22px 20px;font-size:15px;line-height:1.8;color:var(--text-2);border-left:3px solid transparent;margin-left:0;}
.faq-item.is-open .faq-a-inner{border-left-color:var(--brand-500);}

/* CTA 带 */
.cta-band{position:relative;overflow:hidden;background:var(--ink-800);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:72px 0;text-align:center;}
.cta-band::before{content:"";position:absolute;inset:-50%;background:repeating-linear-gradient(8deg,rgba(18,226,155,.06) 0 14px,transparent 14px 38px);pointer-events:none;}
.cta-band h2{font-size:30px;margin-bottom:12px;}
.cta-band p{color:var(--text-2);max-width:560px;margin:0 auto 28px;}
.cta-actions{display:flex;gap:16px;justify-content:center;align-items:center;flex-wrap:wrap;}

/* 栏目导航胶囊 */
.pager{display:flex;gap:10px;flex-wrap:wrap;justify-content:center;padding:36px 0 0;}
.pager a{display:inline-flex;align-items:center;height:38px;padding:0 18px;border-radius:999px;border:1px solid var(--line);color:var(--text-2);font-size:14px;transition:border-color var(--dur) var(--ease),color var(--dur) var(--ease),background var(--dur) var(--ease);}
.pager a:hover{border-color:var(--brand-500);color:var(--brand-300);}
.pager a.is-current{background:var(--brand-500);border-color:var(--brand-500);color:#06231A;font-weight:700;}

/* 页脚 */
.site-footer{background:var(--ink-900);border-top:1px solid var(--line);padding-top:64px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:32px;padding-bottom:40px;border-bottom:1px solid var(--line);}
.footer-brand .brand-mark{font-size:20px;}
.footer-desc{font-size:14px;color:var(--text-3);margin:14px 0 16px;max-width:320px;}
.footer-social{display:flex;gap:10px;}
.footer-social span{width:34px;height:34px;border-radius:10px;border:1px solid var(--line);display:flex;align-items:center;justify-content:center;font-size:12px;color:var(--text-3);transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);}
.footer-social span:hover{color:var(--brand-300);border-color:rgba(18,226,155,.4);}
.footer-title{font-size:14px;font-weight:700;color:var(--text-1);margin-bottom:14px;}
.footer-links li+li{margin-top:10px;}
.footer-links a{font-size:14px;color:var(--text-3);transition:color var(--dur) var(--ease);}
.footer-links a:hover{color:var(--brand-300);}
.footer-info li{font-size:14px;color:var(--text-3);margin-bottom:10px;}
.footer-bottom{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;padding:20px 0 30px;font-size:13px;color:var(--text-3);}

/* 响应式 */
@media (max-width:1024px){
  .nav-links{position:fixed;top:68px;left:0;right:0;height:calc(100vh - 68px);background:var(--ink-900);flex-direction:column;align-items:stretch;gap:6px;padding:24px;transform:translateX(100%);opacity:0;visibility:hidden;overflow-y:auto;transition:transform .24s var(--ease),opacity .24s var(--ease),visibility .24s var(--ease);z-index:55;}
  .nav-links.is-open{transform:none;opacity:1;visibility:visible;}
  .nav-link{font-size:17px;padding:14px 16px;border-radius:var(--r-m);}
  .nav-toggle{display:block;}
  .hero-grid{grid-template-columns:1fr;gap:40px;}
  .hero-grid h1{font-size:32px;}
  .hero-media{order:2;}
  .hero-float{position:static;margin-top:16px;max-width:none;}
  .install-grid{grid-template-columns:1fr;}
  .prep-grid{grid-template-columns:repeat(2,1fr);}
  .error-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:repeat(2,1fr);}
  .section{padding:72px 0;}
}
@media (max-width:768px){
  :root{--pd:20px;}
  .nav-inner{gap:12px;}
  .nav-actions .btn{padding:0 16px;height:40px;font-size:13px;}
  .hero-grid h1{font-size:28px;}
  .section-head h2,.cta-band h2{font-size:23px;}
  .step-track{grid-template-columns:1fr;gap:22px;}
  .step-track::before{display:none;}
  .stat-strip{grid-template-columns:repeat(2,1fr);margin-top:48px;}
  .prep-grid{grid-template-columns:1fr;}
  .error-grid{grid-template-columns:1fr;}
  .section{padding:56px 0;}
  .cta-band{padding:56px 0;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;}
  .cta-actions .btn{width:100%;}
  .hero-cta .btn{width:100%;}
  .install-body h3{font-size:19px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition-duration:.01ms !important;animation-duration:.01ms !important;scroll-behavior:auto !important;}
}

/* roulang page: category4 */
:root{
  --ink-900:#0A0D14;
  --ink-800:#111726;
  --ink-700:#182030;
  --ink-600:#1F2A3D;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --text-1:#EEF3FB;
  --text-2:#A7B3C8;
  --text-3:#6D7C93;
  --brand-500:#12E29B;
  --brand-600:#0BB87D;
  --brand-300:#6BF3C6;
  --violet-500:#6C4DF6;
  --violet-600:#5233DB;
  --amber-400:#FFB13D;
  --danger:#FF5C7A;
  --paper:#F4F6FB;
  --paper-card:#FFFFFF;
  --paper-text:#10141C;
  --paper-text-2:#5A6577;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:16px;
  --r-xl:20px;
  --shadow-card:0 18px 40px rgba(0,0,0,.45);
  --shadow-btn:rgba(18,226,155,.28) 0 10px 30px;
  --ease:cubic-bezier(.2,.7,.3,1);
  --t:180ms var(--ease);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--text-1);
  font-family:"PingFang SC","HarmonyOS Sans","MiSans","Source Han Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.75;
  letter-spacing:0;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color var(--t),border-color var(--t),background var(--t);}
button{font-family:inherit;cursor:pointer;}
h1,h2,h3,h4,p,ul,ol{margin:0;padding:0;}
ul,ol{list-style:none;}
.nums{font-variant-numeric:tabular-nums;font-weight:700;}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px;}
.narrow{max-width:960px;}
::selection{background:var(--brand-500);color:#04120C;}

/* ---------- 导航 ---------- */
.site-nav{
  position:sticky;top:0;z-index:60;
  background:rgba(10,13,20,.86);
  border-bottom:1px solid var(--line);
  transition:background var(--t),border-color var(--t);
}
.nav-inner{
  height:68px;display:flex;align-items:center;justify-content:space-between;gap:24px;
}
.brand{display:flex;flex-direction:column;line-height:1.05;gap:2px;}
.brand-mark{font-size:19px;font-weight:800;letter-spacing:-.01em;color:var(--text-1);}
.brand-mark em{font-style:normal;color:var(--brand-500);}
.brand-sub{font-size:11px;color:var(--text-3);letter-spacing:.14em;}
.nav-links{display:flex;align-items:center;gap:6px;}
.nav-link{
  display:inline-block;padding:9px 14px;border-radius:999px;
  font-size:14px;color:var(--text-2);border:1px solid transparent;
}
.nav-link:hover{color:var(--text-1);background:var(--ink-700);}
.nav-link.active{
  color:var(--brand-300);background:rgba(18,226,155,.12);
  border-color:rgba(18,226,155,.32);
}
.nav-actions{display:flex;align-items:center;gap:12px;}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:var(--r-md);
  background:var(--ink-700);border:1px solid var(--line);color:var(--text-1);font-size:18px;
}
.nav-toggle:hover{border-color:rgba(18,226,155,.4);}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 24px;border-radius:999px;
  font-size:14px;font-weight:600;border:1px solid transparent;
  transition:transform var(--t),background var(--t),box-shadow var(--t),border-color var(--t),color var(--t);
}
.btn-primary{background:var(--brand-500);color:#04120C;box-shadow:var(--shadow-btn);}
.btn-primary:hover{background:var(--brand-300);transform:translateY(-1px);}
.btn-ghost{background:transparent;border-color:var(--line-strong);color:var(--text-1);}
.btn-ghost:hover{border-color:rgba(18,226,155,.55);color:var(--brand-300);transform:translateY(-1px);}
.btn-violet{background:var(--violet-500);color:#fff;}
.btn-violet:hover{background:var(--violet-600);transform:translateY(-1px);}
.btn-sm{height:38px;padding:0 18px;font-size:13px;border-radius:var(--r-md);}
.btn:focus-visible,.nav-link:focus-visible,.acc-head:focus-visible,.index-link:focus-visible{
  outline:2px solid var(--brand-300);outline-offset:2px;
}
.link-arrow{color:var(--brand-500);font-size:14px;font-weight:600;display:inline-flex;align-items:center;gap:6px;}
.link-arrow:hover{color:var(--brand-300);}
.link-arrow::after{content:"→";transition:transform var(--t);}
.link-arrow:hover::after{transform:translateX(4px);}

/* ---------- 通用标签 ---------- */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:999px;font-size:12px;font-weight:600;
  background:rgba(18,226,155,.12);color:var(--brand-300);
  border:1px solid rgba(18,226,155,.24);
}
.tag-violet{background:rgba(108,77,246,.16);color:#BCAEFF;border-color:rgba(108,77,246,.34);}
.tag-amber{background:rgba(255,177,61,.14);color:var(--amber-400);border-color:rgba(255,177,61,.3);}

/* ---------- 面包屑 ---------- */
.crumb{padding:22px 0 0;font-size:13px;color:var(--text-3);display:flex;flex-wrap:wrap;gap:8px;align-items:center;}
.crumb a:hover{color:var(--brand-300);}
.crumb .sep{color:var(--brand-500);}
.crumb .now{color:var(--text-2);}

/* ---------- Hero ---------- */
.hero{position:relative;padding:44px 0 76px;overflow:hidden;}
.hero::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:32px 32px;
  mask-image:radial-gradient(circle at 22% 30%,#000 0%,transparent 72%);
  -webkit-mask-image:radial-gradient(circle at 22% 30%,#000 0%,transparent 72%);
  pointer-events:none;
}
.hero::after{
  content:"";position:absolute;width:640px;height:640px;left:-200px;top:-260px;
  background:radial-gradient(circle,rgba(18,226,155,.16) 0%,transparent 66%);
  pointer-events:none;
}
.hero-grid{position:relative;display:grid;grid-template-columns:7fr 5fr;gap:40px;align-items:center;}
.hero h1{font-size:40px;line-height:1.2;font-weight:800;letter-spacing:-.01em;margin:18px 0 16px;}
.hero h1 span{color:var(--brand-500);}
.hero-sub{font-size:16px;color:var(--text-2);max-width:520px;}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px;}
.hero-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:36px;padding-top:26px;border-top:1px solid var(--line);}
.stat-num{font-size:22px;color:var(--brand-300);}
.stat-key{font-size:12px;color:var(--text-3);margin-top:4px;}
.hero-visual{position:relative;}
.hero-figure{
  border-radius:var(--r-xl);overflow:hidden;border:1px solid var(--line);
  box-shadow:var(--shadow-card);aspect-ratio:16/10;background:var(--ink-700);
}
.hero-figure img{width:100%;height:100%;object-fit:cover;}
.hero-badge-card{
  position:absolute;right:-8px;bottom:-22px;width:236px;
  background:var(--ink-700);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:16px 18px;box-shadow:var(--shadow-card);
}
.hero-badge-card .ver{font-size:18px;color:var(--amber-400);}
.hero-badge-card p{font-size:12px;color:var(--text-2);margin-top:6px;}
.hero-badge-card .go{font-size:12px;color:var(--brand-300);margin-top:10px;display:inline-flex;gap:6px;align-items:center;}
.hero-badge-card .go::after{content:"→";transition:transform var(--t);}
.hero-badge-card:hover .go::after{transform:translateX(4px);}

/* ---------- 板块壳 ---------- */
.section{padding:88px 0;}
.section-alt{background:var(--ink-800);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{max-width:720px;margin-bottom:44px;}
.eyebrow{font-size:12px;letter-spacing:.18em;color:var(--brand-300);font-weight:700;text-transform:uppercase;}
.section-head h2{font-size:30px;line-height:1.25;font-weight:700;margin:12px 0 12px;letter-spacing:-.01em;}
.section-head p{color:var(--text-2);font-size:15px;}
.head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;}

/* ---------- 两栏问答布局 ---------- */
.qa-layout{display:grid;grid-template-columns:280px 1fr;gap:48px;align-items:start;}
.qa-index{position:sticky;top:96px;background:var(--ink-700);border:1px solid var(--line);border-radius:var(--r-lg);padding:22px;}
.qa-index h3{font-size:14px;color:var(--text-1);margin-bottom:14px;}
.index-link{
  display:block;padding:10px 12px;border-left:3px solid transparent;border-radius:0 var(--r-sm) var(--r-sm) 0;
  font-size:14px;color:var(--text-2);
}
.index-link:hover{color:var(--brand-300);border-left-color:var(--brand-500);background:rgba(18,226,155,.07);}
.index-link.on{color:var(--brand-300);border-left-color:var(--brand-500);background:rgba(18,226,155,.09);}
.index-note{margin-top:18px;padding-top:16px;border-top:1px solid var(--line);font-size:12px;color:var(--text-3);}
.qa-group{margin-bottom:44px;}
.qa-group:last-child{margin-bottom:0;}
.qa-group-head{display:flex;align-items:center;gap:12px;margin-bottom:18px;}
.qa-group-head .dot{width:10px;height:10px;background:var(--brand-500);border-radius:2px;transform:rotate(45deg);}
.qa-group-head h2{font-size:22px;font-weight:700;letter-spacing:-.01em;}
.qa-group-head p{font-size:13px;color:var(--text-3);}

.acc-item{background:var(--ink-700);border:1px solid var(--line);border-radius:var(--r-lg);margin-bottom:12px;overflow:hidden;transition:border-color var(--t);}
.acc-item:hover{border-color:rgba(18,226,155,.4);}
.acc-item.open{border-color:rgba(18,226,155,.42);}
.acc-head{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;background:transparent;border:0;text-align:left;
  font-size:16px;font-weight:700;color:var(--text-1);
}
.acc-item.open .acc-head{color:var(--brand-300);}
.acc-icon{
  flex:0 0 auto;width:22px;height:22px;position:relative;border-radius:50%;
  border:1px solid var(--line-strong);transition:transform var(--t),border-color var(--t);
}
.acc-icon::before,.acc-icon::after{
  content:"";position:absolute;background:currentColor;left:50%;top:50%;transform:translate(-50%,-50%);
}
.acc-icon::before{width:10px;height:1.5px;}
.acc-icon::after{width:1.5px;height:10px;transition:opacity var(--t);}
.acc-item.open .acc-icon{transform:rotate(45deg);border-color:var(--brand-500);color:var(--brand-500);}
.acc-panel{display:none;padding:0 22px;}
.acc-panel p{font-size:15px;line-height:1.8;color:var(--text-2);}
.acc-panel p + p{margin-top:12px;}
.acc-panel ul{margin:12px 0 0;}
.acc-panel li{position:relative;padding-left:20px;font-size:14px;line-height:1.8;color:var(--text-2);}
.acc-panel li::before{
  content:"";position:absolute;left:0;top:11px;width:7px;height:7px;border-radius:2px;background:var(--brand-500);
}
.acc-item.open .acc-panel{display:block;padding-bottom:20px;}

/* ---------- 卡片网格 ---------- */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.card{
  background:var(--ink-700);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:26px;transition:transform var(--t),border-color var(--t),box-shadow var(--t);
}
.card:hover{transform:translateY(-4px);border-color:rgba(18,226,155,.4);box-shadow:var(--shadow-card);}
.card-ico{
  width:44px;height:44px;border-radius:var(--r-md);display:flex;align-items:center;justify-content:center;
  background:rgba(18,226,155,.12);border:1px solid rgba(18,226,155,.3);color:var(--brand-300);
  font-size:16px;font-weight:800;margin-bottom:16px;
}
.card-violet .card-ico{background:rgba(108,77,246,.16);border-color:rgba(108,77,246,.36);color:#BCAEFF;}
.card h3{font-size:17px;font-weight:700;margin-bottom:10px;}
.card p{font-size:14px;color:var(--text-2);}

/* ---------- 步骤流程 ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;position:relative;}
.step{
  background:var(--ink-700);border:1px solid var(--line);border-radius:var(--r-lg);padding:24px;
  position:relative;
}
.step-num{font-size:32px;color:var(--ink-600);font-variant-numeric:tabular-nums;font-weight:800;line-height:1;}
.step h3{font-size:16px;font-weight:700;margin:14px 0 8px;}
.step p{font-size:14px;color:var(--text-2);}
.step:hover{border-color:rgba(18,226,155,.4);}
.steps::before{
  content:"";position:absolute;left:6%;right:6%;top:52px;height:1px;
  background:repeating-linear-gradient(90deg,rgba(255,255,255,.22) 0 8px,transparent 8px 16px);
  z-index:0;
}
.steps > *{position:relative;z-index:1;background:var(--ink-700);}

/* ---------- 浅色反转区 ---------- */
.paper-band{background:var(--paper);color:var(--paper-text);padding:80px 0;}
.paper-band .eyebrow{color:var(--brand-600);}
.paper-band h2{font-size:30px;font-weight:700;letter-spacing:-.01em;margin:12px 0 12px;color:var(--paper-text);}
.paper-band .lead{color:var(--paper-text-2);font-size:15px;max-width:660px;}
.paper-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:36px;}
.paper-card{background:var(--paper-card);border-radius:var(--r-lg);padding:26px;border:1px solid rgba(16,20,28,.08);box-shadow:0 10px 26px rgba(16,20,28,.07);}
.paper-card h3{font-size:17px;font-weight:700;margin-bottom:10px;color:var(--paper-text);}
.paper-card p{font-size:14px;color:var(--paper-text-2);}
.paper-card .k{font-size:12px;font-weight:700;letter-spacing:.16em;color:var(--brand-600);}

/* ---------- 图文块 ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center;}
.split figure{border-radius:var(--r-xl);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow-card);}
.split figure img{width:100%;aspect-ratio:4/3;object-fit:cover;}
.split h2{font-size:28px;font-weight:700;line-height:1.28;margin-bottom:16px;letter-spacing:-.01em;}
.split p{color:var(--text-2);font-size:15px;margin-bottom:14px;}
.check-list li{position:relative;padding-left:26px;font-size:15px;color:var(--text-2);margin-bottom:10px;}
.check-list li::before{
  content:"";position:absolute;left:0;top:9px;width:14px;height:8px;
  border-left:2px solid var(--brand-500);border-bottom:2px solid var(--brand-500);transform:rotate(-45deg);
}

/* ---------- 表单 ---------- */
.form-card{background:var(--ink-700);border:1px solid var(--line);border-radius:var(--r-xl);padding:32px;box-shadow:var(--shadow-card);}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;}
.field{display:flex;flex-direction:column;gap:8px;}
.field.full{grid-column:1/-1;}
.field label{font-size:13px;color:var(--text-2);}
.field input,.field select,.field textarea{
  background:var(--ink-800);border:1px solid var(--line);border-radius:var(--r-md);
  padding:12px 14px;color:var(--text-1);font-size:14px;font-family:inherit;
  transition:border-color var(--t),box-shadow var(--t);
}
.field textarea{min-height:118px;resize:vertical;}
.field input::placeholder,.field textarea::placeholder{color:var(--text-3);}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--brand-500);box-shadow:0 0 0 3px rgba(18,226,155,.26);
}
.form-hint{font-size:12px;color:var(--text-3);margin-top:14px;}

/* ---------- CTA 带 ---------- */
.cta-band{
  position:relative;background:var(--ink-800);border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  padding:76px 0;overflow:hidden;text-align:center;
}
.cta-band::before{
  content:"";position:absolute;inset:-40% -10%;
  background:repeating-linear-gradient(8deg,rgba(18,226,155,.08) 0 12px,transparent 12px 34px);
  pointer-events:none;
}
.cta-band .inner{position:relative;max-width:760px;margin:0 auto;}
.cta-band h2{font-size:30px;font-weight:700;letter-spacing:-.01em;margin-bottom:14px;}
.cta-band p{color:var(--text-2);font-size:15px;margin-bottom:28px;}
.cta-actions{display:flex;justify-content:center;gap:16px;flex-wrap:wrap;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink-900);border-top:1px solid var(--line);padding:64px 0 26px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:36px;}
.footer-brand .brand-mark{font-size:20px;}
.footer-desc{font-size:14px;color:var(--text-3);margin-top:14px;max-width:280px;}
.footer-social{display:flex;gap:10px;margin-top:18px;}
.footer-social span{
  width:34px;height:34px;border-radius:var(--r-sm);display:flex;align-items:center;justify-content:center;
  background:var(--ink-700);border:1px solid var(--line);color:var(--text-3);font-size:12px;
}
.footer-title{font-size:14px;color:var(--text-1);margin-bottom:16px;font-weight:700;}
.footer-links li,.footer-info li{margin-bottom:10px;}
.footer-links a{font-size:14px;color:var(--text-3);}
.footer-links a:hover{color:var(--brand-500);}
.footer-info li{font-size:14px;color:var(--text-3);}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--text-3);
}

/* ---------- 响应式 ---------- */
@media (max-width:1280px){
  .qa-layout{grid-template-columns:240px 1fr;gap:36px;}
}
@media (max-width:1023px){
  .container{padding:0 24px;}
  .nav-links{
    position:fixed;left:0;right:0;top:68px;display:none;flex-direction:column;align-items:stretch;
    background:var(--ink-900);border-bottom:1px solid var(--line);
    padding:14px 20px 22px;gap:6px;box-shadow:var(--shadow-card);
  }
  .nav-links.open{display:flex;}
  .nav-link{padding:13px 14px;border-radius:var(--r-md);}
  .nav-toggle{display:inline-flex;align-items:center;justify-content:center;}
  .nav-actions .btn{display:none;}
  .hero-grid{grid-template-columns:1fr;gap:44px;}
  .hero{padding:32px 0 64px;}
  .hero h1{font-size:32px;}
  .hero-visual{order:2;}
  .hero-badge-card{position:static;width:100%;margin-top:14px;}
  .section{padding:72px 0;}
  .qa-layout{grid-template-columns:1fr;}
  .qa-index{position:static;}
  .grid-3,.paper-grid{grid-template-columns:repeat(2,1fr);}
  .grid-4,.steps{grid-template-columns:repeat(2,1fr);}
  .steps::before{display:none;}
  .split{grid-template-columns:1fr;gap:30px;}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .section-head h2,.paper-band h2,.cta-band h2,.split h2{font-size:23px;}
}
@media (max-width:640px){
  .container{padding:0 20px;}
  .hero h1{font-size:28px;}
  .hero-stats{grid-template-columns:1fr;gap:14px;}
  .hero-cta .btn{width:100%;}
  .grid-3,.grid-4,.paper-grid,.steps,.form-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
  .section{padding:56px 0;}
  .cta-actions .btn{width:100%;}
  .footer-bottom{flex-direction:column;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:opacity var(--t) !important;animation:none !important;}
  html{scroll-behavior:auto;}
}