/* roulang page: index */
:root{
  --bg-0:#07080B;--bg-1:#0C0E13;--bg-2:#12151C;
  --surface:#14171F;--surface-2:#191D27;
  --line:rgba(255,255,255,.08);--line-2:rgba(255,255,255,.16);
  --brand:#2CE8B6;--brand-deep:#0FA37D;--glow:rgba(44,232,182,.45);
  --accent:#FF4D8D;--warn:#FFC24B;
  --text-1:#EEF2F6;--text-body:#B9C1CD;--text-2:#9AA3B0;--text-3:#646D7B;
  --r-card:16px;--r-img:12px;--r-pill:999px;
  --shadow-card:inset 0 1px 0 rgba(255,255,255,.05),0 18px 40px -28px rgba(0,0,0,.9);
  --shadow-hover:0 0 0 1px rgba(44,232,182,.28),0 24px 48px -28px rgba(0,0,0,1);
  --ease:cubic-bezier(.22,.61,.36,1);
  --bs-body-bg:var(--bg-0);--bs-body-color:var(--text-body);
  --bs-primary:#2CE8B6;--bs-border-radius:16px;
  --bs-link-color:#2CE8B6;--bs-link-hover-color:#63F2CC;
  --bs-font-sans-serif:-apple-system,"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg-0);color:var(--text-body);
  font-family:-apple-system,"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  font-size:1rem;line-height:1.85;-webkit-font-smoothing:antialiased;overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--brand);text-decoration:none;transition:color .22s var(--ease)}
a:hover{color:#63F2CC}
h1,h2,h3,h4{color:var(--text-1);margin:0;font-weight:700;letter-spacing:-.01em}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:6px}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 20px}
@media (min-width:1400px){.container{max-width:1320px}}

/* 通用元件 */
.section{padding:96px 0;position:relative}
.section-alt{background:var(--bg-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{margin-bottom:48px;max-width:760px}
.section-head h2{font-size:clamp(1.75rem,3vw,2.5rem);line-height:1.2;margin-top:14px}
.section-head p{margin-top:14px;color:var(--text-2);font-size:.9375rem}
.head-split{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;max-width:none}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;font-size:.75rem;letter-spacing:.18em;
  color:var(--brand);text-transform:uppercase;font-weight:600;
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--brand);display:inline-block}
.meta{font-size:.8125rem;color:var(--text-3)}
.text-link{font-size:.875rem;border-bottom:1px solid var(--brand);padding-bottom:4px;white-space:nowrap}
.text-link:hover{border-bottom-width:2px}
.badge-soft{
  display:inline-flex;align-items:center;font-size:.75rem;line-height:1;padding:7px 12px;border-radius:var(--r-pill);
  border:1px solid var(--line-2);color:var(--brand);background:rgba(44,232,182,.05);white-space:nowrap;
}
.badge-accent{color:var(--accent);border-color:rgba(255,77,141,.35);background:rgba(255,77,141,.06)}

/* 按钮 */
.btn-brand,.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 28px;border-radius:var(--r-pill);font-size:.9375rem;font-weight:600;
  cursor:pointer;border:1px solid transparent;transition:all .22s var(--ease);
}
.btn-brand{background:var(--brand);color:#06120E;box-shadow:0 0 24px -4px rgba(44,232,182,.5)}
.btn-brand:hover{color:#06120E;filter:brightness(1.08);transform:translateY(-1px);box-shadow:0 0 30px -2px rgba(44,232,182,.65)}
.btn-ghost{background:transparent;color:var(--text-1);border-color:var(--line-2)}
.btn-ghost:hover{color:var(--brand);border-color:var(--brand);background:rgba(44,232,182,.06)}
.btn-brand.sm,.btn-ghost.sm{height:40px;padding:0 20px;font-size:.875rem}

/* 顶栏 */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:1030;
  background:rgba(7,8,11,.72);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid transparent;transition:border-color .3s var(--ease),background .3s var(--ease);
}
.site-header::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,var(--brand),rgba(44,232,182,0) 70%);
}
.site-header.scrolled{border-bottom-color:var(--line);background:rgba(7,8,11,.92)}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:24px;height:64px}
.logo{display:inline-flex;align-items:center;gap:10px;color:var(--text-1);font-weight:700;font-size:1.0625rem;letter-spacing:.01em}
.logo:hover{color:var(--text-1)}
.logo-mark{width:30px;height:30px;border-radius:9px;background:linear-gradient(140deg,var(--brand),#0A6B54);display:grid;place-items:center;box-shadow:0 0 18px -6px var(--glow)}
.logo-mark svg{width:16px;height:16px;stroke:#06120E;fill:none;stroke-width:2}
.main-nav{display:flex;align-items:center;gap:6px}
.main-nav a{
  position:relative;font-size:.875rem;color:var(--text-2);padding:0 14px;height:64px;display:inline-flex;align-items:center;
}
.main-nav a::after{content:"";position:absolute;left:14px;right:14px;bottom:16px;height:2px;background:var(--brand);transform:scaleX(0);transform-origin:left;transition:transform .22s var(--ease)}
.main-nav a:hover{color:var(--text-1)}
.main-nav a:hover::after{transform:scaleX(1)}
.main-nav a.active{color:var(--text-1)}
.main-nav a.active::after{transform:scaleX(1);box-shadow:0 0 10px 1px var(--glow)}
.nav-actions{display:flex;align-items:center;gap:12px}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:12px;border:1px solid var(--line-2);
  background:transparent;align-items:center;justify-content:center;cursor:pointer;
}
.nav-toggle span{display:block;width:16px;height:2px;background:var(--text-1);position:relative}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:16px;height:2px;background:var(--text-1)}
.nav-toggle span::before{top:-5px}.nav-toggle span::after{top:5px}
.offcanvas{background:var(--bg-1);color:var(--text-body);width:300px;border-left:1px solid var(--line)}
.offcanvas-header{border-bottom:1px solid var(--line);padding:18px 20px}
.offcanvas-body{padding:12px 0}
.offcanvas-body a{display:flex;align-items:center;height:52px;padding:0 20px;color:var(--text-2);font-size:.9375rem;border-left:3px solid transparent}
.offcanvas-body a.active,.offcanvas-body a:hover{color:var(--text-1);border-left-color:var(--brand);background:rgba(44,232,182,.05)}
.offcanvas .btn-close{filter:invert(1) grayscale(1);opacity:.7}

/* Hero */
.hero{
  position:relative;padding:150px 0 96px;overflow:hidden;
  background:linear-gradient(180deg,rgba(7,8,11,.62),rgba(7,8,11,.94)),url('/assets/images/backpic/back-1.png') center/cover no-repeat;
}
.hero::before{
  content:"";position:absolute;top:-220px;left:18%;width:620px;height:620px;pointer-events:none;
  background:radial-gradient(circle,rgba(44,232,182,.20),rgba(44,232,182,0) 65%);
}
.hero::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:170px;pointer-events:none;
  background:linear-gradient(180deg,rgba(7,8,11,0),var(--bg-0));
}
.hero-lines{
  position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:48px 48px;
  mask-image:radial-gradient(ellipse at 30% 20%,#000 20%,transparent 72%);
  -webkit-mask-image:radial-gradient(ellipse at 30% 20%,#000 20%,transparent 72%);
}
.hero .container{position:relative;z-index:2}
.hero h1{font-size:clamp(2.25rem,5vw,4rem);line-height:1.08;font-weight:800;letter-spacing:-.02em;margin-top:18px}
.hero-sub{margin-top:20px;font-size:1.0625rem;color:var(--text-body);max-width:520px}
.hero-actions{display:flex;gap:16px;margin-top:34px;flex-wrap:wrap}
.hero-meta{margin-top:26px;font-size:.8125rem;color:var(--text-3);letter-spacing:.02em}
.hero-visual{position:relative;border-radius:20px;overflow:hidden;border:1px solid var(--line-2);box-shadow:0 0 0 1px rgba(44,232,182,.16),0 30px 60px -30px rgba(0,0,0,1)}
.hero-visual img{width:100%;aspect-ratio:16/10;object-fit:cover}
.hero-visual::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(7,8,11,0) 55%,rgba(7,8,11,.55));pointer-events:none}

/* 轮播 */
.shot-carousel{border:1px solid var(--line);border-radius:20px;background:var(--surface);overflow:hidden}
.shot-slide{display:grid;grid-template-columns:1fr 1.1fr;gap:32px;padding:40px;align-items:center}
.shot-slide h3{font-size:1.375rem}
.shot-slide p{margin-top:14px;color:var(--text-2);font-size:.9375rem}
.shot-slide .thumb{border-radius:var(--r-img);overflow:hidden;border:1px solid var(--line)}
.shot-slide .thumb img{width:100%;aspect-ratio:16/9;object-fit:cover}
.carousel-inner{border-radius:20px}
.shot-bar{display:flex;align-items:center;gap:20px;padding:18px 24px;border-top:1px solid var(--line)}
.shot-track{flex:1;height:2px;background:rgba(255,255,255,.1);position:relative;overflow:hidden}
.shot-fill{position:absolute;inset:0;background:var(--brand);transform:scaleX(0);transform-origin:left}
.carousel-item.active .shot-fill{animation:barGrow 5s linear forwards}
@keyframes barGrow{from{transform:scaleX(0)}to{transform:scaleX(1)}}
.shot-count{font-size:.8125rem;color:var(--text-2);font-variant-numeric:tabular-nums;letter-spacing:.06em}
.shot-nav{display:flex;gap:10px}
.shot-nav button{
  width:40px;height:40px;border-radius:50%;border:1px solid var(--line-2);background:transparent;
  color:var(--text-2);display:grid;place-items:center;cursor:pointer;transition:all .22s var(--ease);
}
.shot-nav button:hover{border-color:var(--brand);color:var(--brand)}

/* 功能价值区 */
.value-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);padding:28px;box-shadow:var(--shadow-card);transition:all .22s var(--ease)}
.value-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.value-card h3{font-size:1.25rem;margin-top:20px}
.value-card p{margin-top:12px;color:var(--text-2);font-size:.9375rem}
.vicon{width:44px;height:44px;border-radius:12px;border:1px solid var(--line-2);display:grid;place-items:center;color:var(--brand)}
.vicon svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.6}
.value-main{display:flex;flex-direction:column;justify-content:space-between;min-height:100%;background:linear-gradient(160deg,var(--surface-2),var(--surface));}
.value-main .thumb{margin-top:26px;border-radius:var(--r-img);overflow:hidden;border:1px solid var(--line)}
.value-main .thumb img{width:100%;aspect-ratio:16/9;object-fit:cover}
.value-stack{display:grid;gap:24px;height:100%}
.value-stack .value-card:first-child{padding-bottom:44px}
.value-stack .value-card:last-child{padding-top:34px}

/* 分类入口 */
.entry-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.entry-card{
  display:block;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--shadow-card);transition:all .22s var(--ease);
}
.entry-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:rgba(44,232,182,.3)}
.entry-card .num{font-size:.75rem;letter-spacing:.18em;color:var(--text-3)}
.entry-card h3{font-size:1.0625rem;margin-top:12px;color:var(--text-1)}
.entry-card:hover h3{color:var(--brand)}
.entry-card p{margin-top:10px;font-size:.875rem;color:var(--text-2)}
.entry-card .go{margin-top:16px;font-size:.8125rem;color:var(--brand);display:inline-flex;gap:6px;align-items:center}

/* 系统要求 */
.specs{border-top:1px solid var(--line)}
.spec-row{display:grid;grid-template-columns:200px 1fr;gap:24px;padding:18px 0;border-bottom:1px solid var(--line);align-items:baseline}
.spec-row dt{color:var(--text-2);font-size:.875rem}
.spec-row dd{margin:0;color:var(--text-1);font-size:.9375rem}
.spec-note{margin-top:24px;font-size:.8125rem;color:var(--text-3)}

/* 评价墙 */
.review-stat{display:flex;align-items:baseline;gap:18px;margin-bottom:36px;flex-wrap:wrap}
.review-stat .big{font-size:clamp(2.5rem,6vw,4rem);font-weight:900;letter-spacing:-.03em;color:var(--brand);line-height:1}
.review-stat span{font-size:.875rem;color:var(--text-2)}
.review-wall{columns:3;column-gap:20px}
.review-card{
  break-inside:avoid;margin-bottom:20px;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-card);padding:24px;box-shadow:var(--shadow-card);transition:all .22s var(--ease);
}
.review-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.review-top{display:flex;align-items:center;gap:12px}
.avatar{width:40px;height:40px;border-radius:50%;border:1px solid var(--line-2);display:grid;place-items:center;color:var(--brand);font-size:.875rem;font-weight:600;background:var(--surface-2)}
.review-name{color:var(--text-1);font-size:.9375rem;font-weight:600}
.stars{display:flex;gap:3px;margin-top:14px}
.stars svg{width:15px;height:15px;fill:none;stroke:var(--warn);stroke-width:1.5}
.review-card p{margin-top:12px;font-size:.9375rem;color:var(--text-body)}
.review-card .meta{display:block;margin-top:14px}

/* 资讯列表 */
.card-surface{display:block;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--shadow-card);transition:all .22s var(--ease)}
.card-surface:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:rgba(44,232,182,.3)}
.card-surface:hover h3{color:var(--brand)}
.card-surface h3{font-size:1.0625rem;line-height:1.5;margin-top:14px;transition:color .22s var(--ease);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-surface .thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .4s var(--ease)}
.card-surface:hover .thumb img{transform:scale(1.03)}
.news-body{padding:22px 24px 26px}
.news-body p{margin-top:12px;font-size:.9375rem;color:var(--text-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-body .meta{display:block;margin-top:16px}
.news-row{display:flex;gap:16px;padding:18px;background:var(--surface);border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow-card);transition:all .22s var(--ease)}
.news-row:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:rgba(44,232,182,.3)}
.news-row:hover h3{color:var(--brand)}
.news-row .thumb{width:132px;flex:0 0 132px;border-radius:10px;overflow:hidden;border:1px solid var(--line)}
.news-row .thumb img{width:100%;height:100%;aspect-ratio:4/3;object-fit:cover;transition:transform .4s var(--ease)}
.news-row:hover .thumb img{transform:scale(1.03)}
.news-row h3{font-size:.9375rem;line-height:1.5;margin-top:10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;transition:color .22s var(--ease)}
.news-row .meta{display:block;margin-top:10px}
.news-list{display:grid;gap:16px}

/* 空态 */
.empty-state{
  border:1px dashed rgba(255,255,255,.12);border-radius:var(--r-card);padding:64px 24px;text-align:center;
  display:flex;flex-direction:column;align-items:center;gap:16px;
}
.empty-state svg{width:34px;height:34px;fill:none;stroke:var(--text-3);stroke-width:1.4}
.empty-state p{font-size:.875rem;color:var(--text-2)}

/* CTA */
.cta-box{
  display:grid;grid-template-columns:1.4fr auto;gap:40px;align-items:center;
  background:var(--surface);border:1px solid rgba(44,232,182,.3);border-radius:20px;padding:44px;
  box-shadow:0 0 40px -22px var(--glow),var(--shadow-card);position:relative;overflow:hidden;
}
.cta-box::before{content:"";position:absolute;top:-140px;right:-60px;width:420px;height:420px;background:radial-gradient(circle,rgba(44,232,182,.14),transparent 65%);pointer-events:none}
.cta-box h2{font-size:clamp(1.5rem,2.6vw,2.125rem);position:relative}
.cta-box p{margin-top:14px;color:var(--text-2);font-size:.9375rem;position:relative}
.cta-side{display:flex;align-items:center;gap:24px;position:relative}
.cta-buttons{display:flex;flex-direction:column;gap:12px}
.qr{width:104px;height:104px;border:1px solid var(--line-2);border-radius:14px;display:grid;place-items:center;color:var(--text-3);font-size:.75rem;text-align:center;padding:8px;line-height:1.5;background:var(--bg-2)}

/* FAQ */
.faq-wrap{max-width:860px}
.accordion-item{background:transparent;border:0;border-top:1px solid var(--line)}
.accordion-item:last-child{border-bottom:1px solid var(--line)}
.accordion-button{
  background:transparent;color:var(--text-1);font-size:1.0625rem;font-weight:600;padding:22px 0 22px 0;gap:16px;
  box-shadow:none;position:relative;display:flex;align-items:center;
}
.accordion-button::before{content:"";position:absolute;left:-16px;top:50%;transform:translateY(-50%) scaleY(0);width:2px;height:26px;background:var(--brand);transition:transform .22s var(--ease)}
.accordion-button:not(.collapsed)::before{transform:translateY(-50%) scaleY(1)}
.accordion-button:not(.collapsed){color:var(--text-1);background:transparent;box-shadow:none}
.accordion-button:focus{box-shadow:none;border-color:transparent}
.accordion-button::after{display:none}
.accordion-button .faq-num{font-size:.8125rem;color:var(--text-3);font-variant-numeric:tabular-nums;flex:0 0 34px}
.accordion-button:not(.collapsed) .faq-num{color:var(--brand)}
.accordion-button .chev{margin-left:auto;width:16px;height:16px;stroke:var(--text-2);fill:none;stroke-width:1.8;transition:transform .22s var(--ease)}
.accordion-button:not(.collapsed) .chev{transform:rotate(180deg);stroke:var(--brand)}
.accordion-body{padding:0 0 26px 34px;color:var(--text-body);font-size:.9375rem;line-height:1.9}

/* 页脚 */
.site-footer{background:var(--bg-0);border-top:1px solid var(--line);position:relative;padding:72px 0 0}
.site-footer::before{content:"";position:absolute;top:-1px;left:0;right:0;height:1px;background:linear-gradient(90deg,rgba(44,232,182,0),var(--brand),rgba(44,232,182,0))}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px}
.footer-grid h4{font-size:.9375rem;color:var(--text-1);margin-bottom:18px;font-weight:600}
.footer-links{display:grid;gap:12px}
.footer-links a{font-size:.875rem;color:var(--text-2)}
.footer-links a:hover{color:var(--brand)}
.footer-brand p{margin-top:16px;font-size:.875rem;color:var(--text-2);max-width:320px}
.footer-qr{width:88px;height:88px;border:1px solid var(--line-2);border-radius:12px;display:grid;place-items:center;color:var(--text-3);font-size:.75rem;text-align:center;padding:6px;line-height:1.5;margin-top:20px}
.footer-bottom{
  margin-top:56px;border-top:1px solid var(--line);padding:22px 0;display:flex;justify-content:space-between;
  gap:16px;flex-wrap:wrap;font-size:.8125rem;color:var(--text-3);
}
.footer-bottom a{color:var(--text-3)}
.footer-bottom a:hover{color:var(--brand)}

/* 动效 */
.fade-up{opacity:0;transform:translateY(16px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.fade-up.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important}
  .fade-up{opacity:1;transform:none}
  html{scroll-behavior:auto}
}
::-webkit-scrollbar{width:8px;height:8px}
::-webkit-scrollbar-track{background:var(--bg-1)}
::-webkit-scrollbar-thumb{background:rgba(255,255,255,.14);border-radius:99px}
::-webkit-scrollbar-thumb:hover{background:rgba(44,232,182,.4)}

/* 响应式 */
@media (max-width:1199px){
  .entry-grid{grid-template-columns:repeat(2,1fr)}
  .review-wall{columns:2}
}
@media (max-width:991px){
  .main-nav,.nav-actions .btn-brand{display:none}
  .nav-toggle{display:inline-flex}
  .section{padding:72px 0}
  .hero{padding:120px 0 72px}
  .hero-visual{margin-top:40px}
  .shot-slide{grid-template-columns:1fr;padding:28px;gap:22px}
  .cta-box{grid-template-columns:1fr;padding:32px}
  .cta-side{justify-content:flex-start}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .head-split{flex-direction:column;align-items:flex-start;gap:14px}
}
@media (max-width:767px){
  .section{padding:56px 0}
  .hero{padding:104px 0 56px}
  .hero h1{font-size:clamp(1.9rem,8vw,2.6rem)}
  .spec-row{grid-template-columns:1fr;gap:4px;padding:14px 0}
  .review-wall{columns:1}
  .value-stack .value-card:first-child,.value-stack .value-card:last-child{padding-bottom:28px;padding-top:28px}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .news-row .thumb{width:96px;flex:0 0 96px}
}
@media (max-width:575px){
  .hero-actions{flex-direction:column}
  .hero-actions .btn-brand,.hero-actions .btn-ghost{width:100%}
  .entry-grid{grid-template-columns:1fr}
  .cta-side{flex-direction:column;align-items:flex-start}
  .cta-buttons{width:100%}
  .cta-buttons .btn-brand,.cta-buttons .btn-ghost{width:100%}
  .accordion-body{padding-left:0}
}

/* roulang page: article */
:root{
  --bg-0:#07080B;
  --bg-1:#0C0E13;
  --bg-2:#12151C;
  --surface:#14171F;
  --surface-2:#191D27;
  --line:rgba(255,255,255,.08);
  --line-2:rgba(255,255,255,.16);
  --brand:#2CE8B6;
  --brand-deep:#0FA37D;
  --brand-glow:rgba(44,232,182,.45);
  --accent:#FF4D8D;
  --warn:#FFC24B;
  --text-1:#EEF2F6;
  --text-body:#B9C1CD;
  --text-2:#9AA3B0;
  --text-3:#646D7B;
  --radius-card:16px;
  --radius-img:12px;
  --shadow-card:0 1px 0 rgba(255,255,255,.05) inset, 0 18px 40px -28px rgba(0,0,0,.9);
  --shadow-hover:0 0 0 1px rgba(44,232,182,.28), 0 24px 48px -28px rgba(0,0,0,1);
  --ease:cubic-bezier(.22,.61,.36,1);
  --bs-body-bg:#07080B;
  --bs-body-color:#B9C1CD;
  --bs-primary:#2CE8B6;
  --bs-link-color:#2CE8B6;
  --bs-link-hover-color:#2CE8B6;
  --bs-border-radius:16px;
  --bs-font-sans-serif:-apple-system,"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",sans-serif;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--text-body);
  font-family:-apple-system,"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:var(--brand);text-decoration:none;transition:color .22s var(--ease),border-color .22s var(--ease);}
a:hover{color:var(--text-1);}
h1,h2,h3,h4,h5{color:var(--text-1);margin:0;font-weight:700;line-height:1.25;}
p{margin:0 0 1em;}
::selection{background:rgba(44,232,182,.28);color:#fff;}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:6px;}
::-webkit-scrollbar{width:8px;height:8px;}
::-webkit-scrollbar-track{background:var(--bg-1);}
::-webkit-scrollbar-thumb{background:rgba(255,255,255,.14);border-radius:8px;}
::-webkit-scrollbar-thumb:hover{background:rgba(44,232,182,.4);}

.container{width:100%;max-width:1240px;margin:0 auto;padding:0 20px;}
@media(min-width:1400px){.container{max-width:1320px;}}

/* ---------- 顶部霓虹线 & 顶栏 ---------- */
.topline{height:1px;width:100%;background:linear-gradient(90deg,var(--brand) 0%,rgba(44,232,182,.25) 42%,rgba(44,232,182,0) 100%);position:fixed;top:0;left:0;z-index:1045;}
.site-header{
  position:sticky;top:0;z-index:1040;
  background:rgba(7,8,11,.72);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid transparent;
  transition:border-color .22s var(--ease),background .22s var(--ease);
}
.site-header.is-scrolled{border-bottom-color:var(--line);}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:64px;}
.logo{display:inline-flex;align-items:center;gap:10px;color:var(--text-1);}
.logo:hover{color:var(--text-1);}
.logo-mark{
  width:32px;height:32px;flex:0 0 32px;border-radius:10px;
  background:linear-gradient(145deg,rgba(44,232,182,.18),rgba(44,232,182,.04));
  border:1px solid rgba(44,232,182,.45);
  display:inline-flex;align-items:center;justify-content:center;
  box-shadow:0 0 18px -6px var(--brand-glow);
}
.logo-mark svg{width:18px;height:18px;fill:none;stroke:var(--brand);stroke-width:1.6;stroke-linecap:round;}
.logo-text{font-size:1.0625rem;font-weight:800;letter-spacing:.02em;}
.main-nav{display:flex;align-items:center;gap:6px;}
.main-nav a{
  position:relative;
  display:inline-block;
  padding:8px 12px;
  font-size:14px;
  color:var(--text-2);
  border-radius:8px;
  transition:color .22s var(--ease);
}
.main-nav a::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:var(--brand);border-radius:2px;opacity:0;transform:translateY(4px);
  transition:opacity .22s var(--ease),transform .22s var(--ease);
}
.main-nav a:hover{color:var(--text-1);}
.main-nav a:hover::after{opacity:.5;transform:translateY(0);}
.main-nav a.active{color:var(--text-1);}
.main-nav a.active::after{opacity:1;transform:translateY(0);box-shadow:0 0 8px 1px var(--brand-glow);}
.header-actions{display:flex;align-items:center;gap:12px;}

.btn-brand{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 28px;border-radius:999px;border:0;
  background:var(--brand);color:#06120E;font-size:14px;font-weight:600;letter-spacing:.02em;
  box-shadow:0 0 24px -6px var(--brand-glow);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),filter .22s var(--ease);
}
.btn-brand:hover{color:#06120E;filter:brightness(1.08);transform:translateY(-1px);box-shadow:0 0 32px -4px var(--brand-glow);}
.btn-brand.btn-sm{height:40px;padding:0 20px;font-size:13px;}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;border-radius:999px;
  background:transparent;border:1px solid var(--line-2);color:var(--text-1);
  font-size:14px;font-weight:600;
  transition:border-color .22s var(--ease),color .22s var(--ease),background .22s var(--ease),transform .22s var(--ease);
}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);background:rgba(44,232,182,.06);transform:translateY(-1px);}
.btn-sm.btn-ghost{height:40px;padding:0 18px;font-size:13px;}
.nav-toggle{
  display:none;width:40px;height:40px;border-radius:12px;
  border:1px solid var(--line-2);background:transparent;color:var(--text-1);
  align-items:center;justify-content:center;
}
.nav-toggle:hover{border-color:var(--brand);color:var(--brand);}
.mobile-drawer{background:var(--bg-1)!important;width:300px!important;border-left:1px solid var(--line);color:var(--text-body);}
.mobile-drawer .offcanvas-header{border-bottom:1px solid var(--line);padding:18px 20px;}
.mobile-drawer .offcanvas-title{font-size:1rem;color:var(--text-1);font-weight:700;}
.mobile-drawer .drawer-nav{display:flex;flex-direction:column;padding:8px 0;}
.mobile-drawer .drawer-nav a{
  display:flex;align-items:center;height:52px;padding:0 20px;
  color:var(--text-2);font-size:15px;border-left:3px solid transparent;
}
.mobile-drawer .drawer-nav a:hover{color:var(--text-1);background:rgba(255,255,255,.03);}
.mobile-drawer .drawer-nav a.active{color:var(--text-1);border-left-color:var(--brand);background:rgba(44,232,182,.06);}
.mobile-drawer .drawer-foot{padding:20px;border-top:1px solid var(--line);}
@media(max-width:991.98px){
  .main-nav{display:none;}
  .nav-toggle{display:inline-flex;}
  .header-inner{height:56px;}
  .header-actions .btn-brand{display:none;}
}

/* ---------- 面包屑 & 文章头部 ---------- */
.crumbs-band{
  position:relative;
  padding:36px 0 28px;
  background:linear-gradient(180deg,rgba(7,8,11,0) 0%,rgba(7,8,11,0) 100%),
             url('/assets/images/backpic/back-1.png') center/cover no-repeat;
}
.crumbs-band::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(7,8,11,.86) 0%,rgba(7,8,11,.96) 70%,var(--bg-0) 100%);
}
.crumbs-inner{position:relative;z-index:2;}
.breadcrumb-nav{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-2);}
.breadcrumb-nav a{color:var(--text-2);}
.breadcrumb-nav a:hover{color:var(--brand);}
.breadcrumb-nav .sep{color:var(--text-3);}
.breadcrumb-nav .cur{color:var(--text-1);max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}

.article-section{padding:0 0 96px;}
.article-head{max-width:820px;margin:0 auto;padding-top:8px;}
.badge-cat{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 14px;border-radius:999px;border:1px solid rgba(44,232,182,.4);
  font-size:12px;letter-spacing:.06em;color:var(--brand);background:rgba(44,232,182,.07);
}
.article-head h1{
  font-size:clamp(1.85rem,3.6vw,2.9rem);
  line-height:1.22;font-weight:800;letter-spacing:-.015em;
  margin:18px 0 16px;
}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13px;color:var(--text-2);}
.article-meta .dot{color:var(--text-3);}
.article-cover{
  margin:28px 0 0;border-radius:var(--radius-img);overflow:hidden;
  border:1px solid var(--line);box-shadow:var(--shadow-card);
  aspect-ratio:16/9;background:var(--surface-2);
}
.article-cover img{width:100%;height:100%;object-fit:cover;}

/* ---------- 正文排版 ---------- */
.article-body{
  max-width:760px;margin:44px auto 0;
  font-size:1.0625rem;line-height:1.9;color:var(--text-body);
  word-wrap:break-word;overflow-wrap:break-word;
}
.article-body>*:first-child{margin-top:0;}
.article-body p{margin:0 0 1.2em;}
.article-body h2{
  font-size:clamp(1.35rem,2.2vw,1.6rem);color:var(--text-1);font-weight:700;
  margin:48px 0 16px;padding-left:14px;border-left:3px solid var(--brand);line-height:1.4;
}
.article-body h3{font-size:1.1875rem;color:var(--text-1);font-weight:600;margin:30px 0 12px;}
.article-body h4{font-size:1.0625rem;color:var(--text-1);font-weight:600;margin:24px 0 10px;}
.article-body a{color:var(--brand);border-bottom:1px solid rgba(44,232,182,.5);padding-bottom:1px;}
.article-body a:hover{border-bottom-width:2px;color:var(--brand);}
.article-body strong{color:var(--text-1);font-weight:600;}
.article-body blockquote{
  margin:26px 0;padding:20px 22px;border-left:3px solid var(--brand);
  background:rgba(44,232,182,.06);border-radius:0 12px 12px 0;color:var(--text-body);
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body ul{list-style:none;padding-left:0;margin:0 0 1.2em;}
.article-body ul>li{position:relative;padding-left:20px;margin-bottom:10px;}
.article-body ul>li::before{
  content:"";position:absolute;left:0;top:.78em;width:6px;height:6px;
  background:var(--brand);border-radius:2px;
}
.article-body ol{padding-left:1.3em;margin:0 0 1.2em;}
.article-body ol>li{margin-bottom:10px;padding-left:4px;}
.article-body ol>li::marker{color:var(--brand);font-weight:600;}
.article-body img{
  max-width:100%;height:auto;border-radius:var(--radius-img);
  border:1px solid var(--line);margin:26px auto;
}
.article-body figure{margin:26px 0;}
.article-body figcaption{font-size:.8125rem;color:var(--text-3);text-align:center;margin-top:12px;}
.article-body pre{
  background:#0B0D12;border:1px solid var(--line);border-radius:12px;
  padding:16px 18px;overflow-x:auto;margin:22px 0;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:.875rem;line-height:1.75;color:#CFE9E0;
}
.article-body code{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:.875em;color:var(--brand);background:rgba(44,232,182,.08);
  padding:2px 6px;border-radius:6px;
}
.article-body pre code{background:transparent;color:inherit;padding:0;font-size:1em;}
.article-body table{
  width:100%;border-collapse:collapse;margin:22px 0;display:block;overflow-x:auto;
  white-space:nowrap;font-size:.9375rem;
}
.article-body th,.article-body td{padding:12px 14px;border-bottom:1px solid var(--line);text-align:left;}
.article-body th{color:var(--text-1);font-weight:600;background:rgba(255,255,255,.03);}
.article-body tbody tr:nth-child(even){background:rgba(255,255,255,.02);}
.article-body hr{border:0;border-top:1px solid var(--line);margin:36px 0;}

/* ---------- 标签 / 翻页 / 相关 ---------- */
.article-tags{
  max-width:760px;margin:44px auto 0;padding-top:24px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:10px;
}
.tag-pill{
  display:inline-flex;align-items:center;padding:6px 14px;border-radius:999px;
  border:1px solid var(--line-2);font-size:12.5px;color:var(--text-2);
  transition:border-color .22s var(--ease),color .22s var(--ease),background .22s var(--ease);
}
.tag-pill:hover{border-color:var(--brand);color:var(--brand);background:rgba(44,232,182,.06);}
.tag-pill.is-accent{border-color:rgba(255,77,141,.4);color:var(--accent);}

.post-nav{max-width:920px;margin:44px auto 0;display:grid;grid-template-columns:1fr 1fr;gap:20px;}
.post-card{
  display:block;padding:22px 24px;border-radius:var(--radius-card);
  background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow-card);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.post-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:transparent;}
.post-card .k{font-size:12px;letter-spacing:.18em;color:var(--text-3);display:flex;align-items:center;gap:8px;}
.post-card .k::before{content:"";width:16px;height:1px;background:var(--brand);display:inline-block;}
.post-card .t{margin-top:12px;font-size:1rem;font-weight:600;color:var(--text-1);line-height:1.55;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.post-card:hover .t{color:var(--brand);}

.related-wrap{max-width:1240px;margin:72px auto 0;padding-top:8px;}
.related-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:26px;flex-wrap:wrap;}
.related-head h2{font-size:clamp(1.4rem,2.4vw,1.85rem);}
.related-head .eyebrow{
  font-size:12px;letter-spacing:.18em;color:var(--text-3);display:flex;align-items:center;gap:8px;margin-bottom:10px;
}
.related-head .eyebrow::before{content:"";width:18px;height:1px;background:var(--brand);display:inline-block;}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.r-card{
  display:flex;flex-direction:column;border-radius:var(--radius-card);overflow:hidden;
  background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow-card);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.r-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:transparent;}
.r-card .thumb{aspect-ratio:16/9;overflow:hidden;background:var(--surface-2);}
.r-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease);}
.r-card:hover .thumb img{transform:scale(1.03);}
.r-card .body{padding:20px 22px 24px;display:flex;flex-direction:column;gap:10px;flex:1;}
.r-card .badge-cat{align-self:flex-start;}
.r-card .t{font-size:1.0625rem;font-weight:600;color:var(--text-1);line-height:1.5;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.r-card:hover .t{color:var(--brand);}
.r-card .d{font-size:.875rem;color:var(--text-2);line-height:1.75;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.r-card .m{margin-top:auto;font-size:12.5px;color:var(--text-3);}

.back-row{max-width:920px;margin:44px auto 0;display:flex;justify-content:center;}

/* 空态 */
.empty-state{
  border:1px dashed rgba(255,255,255,.12);border-radius:var(--radius-card);
  padding:64px 24px;text-align:center;background:rgba(255,255,255,.01);
}
.empty-state svg{width:40px;height:40px;stroke:var(--text-3);fill:none;stroke-width:1.4;margin:0 auto 18px;}
.empty-state p{font-size:14px;color:var(--text-2);margin-bottom:20px;}

/* ---------- CTA 条 ---------- */
.cta-band{padding:0 0 96px;}
.cta-box{
  position:relative;overflow:hidden;
  display:flex;align-items:center;justify-content:space-between;gap:32px;
  padding:40px 44px;border-radius:20px;
  background:var(--surface);border:1px solid rgba(44,232,182,.3);
  box-shadow:0 0 60px -30px var(--brand-glow),var(--shadow-card);
}
.cta-box::after{
  content:"";position:absolute;right:-60px;top:-80px;width:280px;height:280px;
  background:radial-gradient(circle,rgba(44,232,182,.16),rgba(44,232,182,0) 70%);
  pointer-events:none;
}
.cta-box h2{font-size:clamp(1.3rem,2.2vw,1.75rem);margin-bottom:10px;}
.cta-box p{font-size:.9375rem;color:var(--text-2);margin:0;max-width:520px;}
.cta-actions{display:flex;align-items:center;gap:14px;position:relative;z-index:2;flex-wrap:wrap;}
.qr-box{
  width:92px;height:92px;border-radius:12px;border:1px dashed var(--line-2);
  display:flex;align-items:center;justify-content:center;text-align:center;
  font-size:11.5px;line-height:1.5;color:var(--text-3);flex:0 0 92px;
}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--bg-0);border-top:1px solid var(--line);position:relative;padding:64px 0 0;
}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,rgba(44,232,182,0) 0%,var(--brand) 45%,rgba(44,232,182,0) 100%);
}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:48px;}
.footer-brand .logo{margin-bottom:16px;}
.footer-brand p{font-size:.875rem;color:var(--text-2);line-height:1.85;max-width:340px;}
.footer-grid h4{font-size:.9375rem;color:var(--text-1);font-weight:600;margin-bottom:18px;}
.footer-links{display:flex;flex-direction:column;gap:12px;}
.footer-links a{font-size:.875rem;color:var(--text-2);}
.footer-links a:hover{color:var(--brand);}
.footer-qr{
  margin-top:18px;width:96px;height:96px;border-radius:12px;border:1px dashed var(--line-2);
  display:flex;align-items:center;justify-content:center;text-align:center;
  font-size:11.5px;line-height:1.5;color:var(--text-3);
}
.footer-bottom{
  border-top:1px solid var(--line);padding:22px 0 28px;
  display:flex;flex-wrap:wrap;gap:12px 28px;justify-content:space-between;
  font-size:12.5px;color:var(--text-3);
}
.footer-bottom a{color:var(--text-3);}
.footer-bottom a:hover{color:var(--brand);}

@media(max-width:991.98px){
  .article-section{padding-bottom:72px;}
  .cta-band{padding-bottom:72px;}
  .post-nav{grid-template-columns:1fr;}
  .related-grid{grid-template-columns:repeat(2,1fr);gap:20px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .cta-box{flex-direction:column;align-items:flex-start;padding:32px 28px;}
}
@media(max-width:767.98px){
  .crumbs-band{padding:26px 0 20px;}
  .article-body{margin-top:32px;}
  .related-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;gap:8px;}
}
@media(max-width:575.98px){
  .container{padding:0 16px;}
  .article-section{padding-bottom:56px;}
  .cta-band{padding-bottom:56px;}
  .btn-brand,.btn-ghost{width:100%;}
  .cta-actions{width:100%;}
  .qr-box{display:none;}
  .article-head h1{font-size:1.65rem;}
  .footer-grid{grid-template-columns:1fr;}
}

/* 入场动效 */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .6s var(--ease),transform .6s var(--ease);}
.reveal.in{opacity:1;transform:none;}
@media(prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}

/* roulang page: category1 */
:root{
  --bg-0:#07080B;
  --bg-1:#0C0E13;
  --bg-2:#12151C;
  --surface:#14171F;
  --surface-2:#191D27;
  --line:rgba(255,255,255,.08);
  --line-2:rgba(255,255,255,.16);
  --brand:#2CE8B6;
  --brand-deep:#0FA37D;
  --glow:rgba(44,232,182,.45);
  --accent:#FF4D8D;
  --warn:#FFC24B;
  --text-1:#EEF2F6;
  --text-body:#B9C1CD;
  --text-2:#9AA3B0;
  --text-3:#646D7B;
  --r-lg:20px;
  --r-md:16px;
  --r-sm:12px;
  --pill:999px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --dur:220ms;
  --shadow:inset 0 1px 0 rgba(255,255,255,.05), 0 18px 40px -28px rgba(0,0,0,.9);
  --shadow-hover:0 0 0 1px rgba(44,232,182,.28), 0 24px 48px -28px rgba(0,0,0,1);
  --font-sans:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --bs-body-bg:var(--bg-0);
  --bs-body-color:var(--text-body);
  --bs-primary:#2CE8B6;
  --bs-border-radius:16px;
  --bs-link-color:#2CE8B6;
  --bs-link-hover-color:#6CF2CE;
  --bs-body-font-family:var(--font-sans);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--text-body);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--brand);text-decoration:none}
a:hover{color:#6CF2CE}
h1,h2,h3,h4{margin:0;color:var(--text-1);font-weight:700}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
::selection{background:rgba(44,232,182,.28);color:#fff}
::-webkit-scrollbar{width:8px;height:8px}
::-webkit-scrollbar-track{background:var(--bg-1)}
::-webkit-scrollbar-thumb{background:rgba(255,255,255,.14);border-radius:8px}
::-webkit-scrollbar-thumb:hover{background:rgba(44,232,182,.4)}

.container{width:100%;max-width:1240px;margin:0 auto;padding-left:24px;padding-right:24px}
@media (min-width:1400px){.container{max-width:1320px}}
@media (max-width:575px){.container{padding-left:16px;padding-right:16px}}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(7,8,11,.72);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid transparent;
  transition:border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.site-header::before{
  content:"";display:block;height:1px;width:100%;
  background:linear-gradient(90deg,var(--brand),rgba(44,232,182,.25) 40%,rgba(44,232,182,0));
}
.site-header.is-scrolled{border-bottom-color:var(--line);background:rgba(7,8,11,.9)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:64px}
.logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.logo-mark{
  width:32px;height:32px;border-radius:10px;display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(140deg,rgba(44,232,182,.22),rgba(44,232,182,.04));
  border:1px solid rgba(44,232,182,.36);
}
.logo-mark svg{width:18px;height:18px;fill:none;stroke:var(--brand);stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.logo-text{font-size:1.0625rem;font-weight:700;color:var(--text-1);letter-spacing:.01em}
.main-nav{display:flex;align-items:center;gap:28px}
.main-nav a{
  position:relative;font-size:14px;color:var(--text-2);padding:8px 0;
  transition:color var(--dur) var(--ease);
}
.main-nav a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--brand);
  transform:scaleX(0);transform-origin:left;opacity:.6;
  transition:transform var(--dur) var(--ease),opacity var(--dur) var(--ease);
  box-shadow:0 0 8px var(--glow);
}
.main-nav a:hover{color:var(--text-1)}
.main-nav a:hover::after{transform:scaleX(1)}
.main-nav a.active{color:var(--text-1)}
.main-nav a.active::after{transform:scaleX(1);opacity:1}
.header-actions{display:flex;align-items:center;gap:12px}
.nav-toggle{
  display:none;width:40px;height:40px;border-radius:12px;border:1px solid var(--line-2);
  background:transparent;padding:0;flex-direction:column;align-items:center;justify-content:center;gap:4px;
  transition:border-color var(--dur) var(--ease);
}
.nav-toggle span{display:block;width:16px;height:1.5px;background:var(--text-1);border-radius:2px}
.nav-toggle:hover{border-color:var(--brand)}
@media (max-width:991px){
  .header-inner{height:56px}
  .main-nav{display:none}
  .nav-toggle{display:flex}
  .header-actions .btn-brand{display:none}
}

/* ---------- Buttons ---------- */
.btn-brand,.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 28px;border-radius:var(--pill);
  font-size:15px;font-weight:600;line-height:1;cursor:pointer;white-space:nowrap;
  transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease),background var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease),filter var(--dur) var(--ease);
}
.btn-brand{background:var(--brand);color:#06120E;border:0;box-shadow:0 0 24px -4px rgba(44,232,182,.5)}
.btn-brand:hover{color:#06120E;filter:brightness(1.08);transform:translateY(-1px);box-shadow:0 0 32px -2px rgba(44,232,182,.6)}
.btn-brand:active{transform:translateY(0)}
.btn-ghost{background:transparent;color:var(--text-1);border:1px solid var(--line-2)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);background:rgba(44,232,182,.06);transform:translateY(-1px)}
.btn-compact{height:40px;padding:0 20px;font-size:14px}
@media (max-width:575px){.btn-brand,.btn-ghost{height:44px;padding:0 22px;font-size:14px}}

/* ---------- Mobile offcanvas ---------- */
.mobile-nav{background:var(--bg-1);border-left:1px solid var(--line);width:300px;color:var(--text-body)}
.mobile-nav .offcanvas-header{border-bottom:1px solid var(--line);padding:16px 20px}
.mobile-nav .offcanvas-body{padding:12px 0 24px;display:flex;flex-direction:column}
.mobile-nav .m-link{
  display:flex;align-items:center;height:52px;padding:0 20px;font-size:15px;color:var(--text-2);
  border-left:3px solid transparent;transition:color var(--dur) var(--ease),background var(--dur) var(--ease)
}
.mobile-nav .m-link:hover{color:var(--text-1);background:rgba(255,255,255,.03)}
.mobile-nav .m-link.active{color:var(--text-1);border-left-color:var(--brand);background:rgba(44,232,182,.06)}
.mobile-nav .m-cta{margin:20px}
.btn-close{filter:invert(1) grayscale(1);opacity:.6}
.btn-close:hover{opacity:1}

/* ---------- Hero ---------- */
.page-hero{
  position:relative;overflow:hidden;min-height:320px;
  display:flex;align-items:flex-end;
  padding:56px 0 44px;
  background-image:linear-gradient(180deg,rgba(7,8,11,.78),rgba(7,8,11,.94)),url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
  border-bottom:1px solid var(--line);
}
.page-hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:48px 48px;
}
.page-hero::after{
  content:"";position:absolute;left:50%;top:-45%;width:72%;height:130%;transform:translateX(-50%);
  background:radial-gradient(ellipse at center,rgba(44,232,182,.16),transparent 66%);
  pointer-events:none;
}
.page-hero .container{position:relative;z-index:1}
.breadcrumb-nav{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-2);margin-bottom:20px}
.breadcrumb-nav a{color:var(--text-2)}
.breadcrumb-nav a:hover{color:var(--brand)}
.breadcrumb-nav .sep{color:var(--text-3)}
.breadcrumb-nav .current{color:var(--text-1)}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;margin:0 0 14px;
  font-size:12px;letter-spacing:.18em;color:var(--brand);text-transform:uppercase;
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--brand)}
.page-hero h1{
  font-size:clamp(1.9rem,4.2vw,3rem);line-height:1.15;font-weight:800;letter-spacing:-.02em;
  margin:0 0 14px;max-width:860px;
}
.hero-sub{margin:0;color:var(--text-2);font-size:1rem;max-width:700px}
@media (max-width:575px){.page-hero{min-height:0;padding:40px 0 36px}}

/* ---------- Sections ---------- */
.section{padding:96px 0}
@media (max-width:991px){.section{padding:72px 0}}
@media (max-width:575px){.section{padding:56px 0}}
.section-head{max-width:760px;margin-bottom:48px}
.section-head h2{font-size:clamp(1.75rem,3vw,2.5rem);line-height:1.2;letter-spacing:-.01em;margin-bottom:14px}
.section-head p{color:var(--text-2);font-size:.95rem}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.section-head.center .eyebrow{justify-content:center}

/* ---------- Alternating rows ---------- */
.alt-list{display:flex;flex-direction:column;gap:64px}
.alt-item{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.alt-item:nth-child(even) .alt-media{order:2}
.alt-media{
  position:relative;border-radius:var(--r-md);overflow:hidden;
  border:1px solid var(--line);background:var(--surface);box-shadow:var(--shadow);
}
.alt-media img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform 400ms var(--ease)}
.alt-item:hover .alt-media img{transform:scale(1.03)}
.alt-index{font-family:var(--font-mono);font-size:13px;letter-spacing:.1em;color:var(--brand)}
.alt-body h3{font-size:1.25rem;font-weight:600;margin:10px 0 14px;letter-spacing:-.01em}
.alt-body p{font-size:.95rem;line-height:1.85;color:var(--text-body);margin-bottom:10px}
.alt-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.tag{
  display:inline-flex;align-items:center;height:28px;padding:0 12px;border-radius:var(--pill);
  border:1px solid var(--line-2);font-size:12px;color:var(--text-2);
  transition:border-color var(--dur) var(--ease),color var(--dur) var(--ease)
}
.alt-item:hover .tag{border-color:rgba(44,232,182,.35);color:var(--brand)}
@media (max-width:991px){
  .alt-list{gap:48px}
  .alt-item{grid-template-columns:1fr;gap:20px}
  .alt-item:nth-child(even) .alt-media{order:0}
}

/* ---------- Spec list ---------- */
.spec-wrap{display:grid;grid-template-columns:4fr 8fr;gap:48px;align-items:start}
.spec-intro h2{font-size:clamp(1.6rem,2.6vw,2.2rem);line-height:1.22;margin-bottom:16px}
.spec-intro p{font-size:.95rem;color:var(--text-2);margin-bottom:18px}
.spec-note{
  display:inline-flex;align-items:center;gap:8px;font-size:12px;color:var(--text-3);
  border:1px dashed var(--line-2);border-radius:var(--pill);padding:6px 14px;
}
.spec-list{border-top:1px solid var(--line)}
.spec-row{
  display:grid;grid-template-columns:200px 1fr;gap:24px;
  padding:20px 0;border-bottom:1px solid var(--line);
  transition:background var(--dur) var(--ease)
}
.spec-row:hover{background:rgba(255,255,255,.02)}
.spec-row dt{color:var(--text-1);font-weight:600;font-size:.95rem}
.spec-row dd{margin:0;color:var(--text-body);font-size:.95rem;line-height:1.8}
@media (max-width:991px){.spec-wrap{grid-template-columns:1fr;gap:28px}}
@media (max-width:767px){
  .spec-row{grid-template-columns:1fr;gap:6px;padding:18px 0}
}

/* ---------- Scene cards ---------- */
.scene-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.scene-card{
  display:flex;gap:16px;padding:26px;border:1px solid var(--line);border-radius:var(--r-md);
  background:var(--surface);box-shadow:var(--shadow);
  transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease),border-color var(--dur) var(--ease)
}
.scene-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:rgba(44,232,182,.3)}
.scene-icon{
  flex:0 0 44px;width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  border:1px solid rgba(44,232,182,.28);background:rgba(44,232,182,.06)
}
.scene-icon svg{width:22px;height:22px;fill:none;stroke:var(--brand);stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.scene-card h3{font-size:1.0625rem;font-weight:600;margin-bottom:6px}
.scene-card p{font-size:.9rem;color:var(--text-2);line-height:1.8}
@media (max-width:575px){.scene-grid{grid-template-columns:1fr;padding:0}.scene-card{padding:22px}}

/* ---------- FAQ ---------- */
.faq-acc{border-top:1px solid var(--line)}
.faq-acc .accordion-item{background:transparent;border:0;border-bottom:1px solid var(--line)}
.faq-acc .accordion-header{margin:0}
.faq-acc .accordion-button{
  display:flex;align-items:flex-start;gap:14px;width:100%;
  background:transparent;border:0;border-radius:0;box-shadow:none;
  padding:22px 8px 22px 0;font-size:1rem;font-weight:600;color:var(--text-1);
  transition:color var(--dur) var(--ease)
}
.faq-acc .accordion-button:not(.collapsed){color:var(--text-1);background:transparent;box-shadow:none}
.faq-acc .accordion-button:focus{box-shadow:none;outline:none;border-radius:0}
.faq-acc .accordion-button:focus-visible{outline:2px solid var(--brand);outline-offset:-2px}
.q-no{font-family:var(--font-mono);font-size:13px;color:var(--text-3);flex:0 0 auto;padding-top:2px;transition:color var(--dur) var(--ease)}
.faq-acc .accordion-button:not(.collapsed) .q-no{color:var(--brand)}
.faq-acc .accordion-button::after{
  content:"";flex:0 0 auto;width:9px;height:9px;margin-left:auto;margin-top:8px;
  border-right:1.6px solid var(--text-2);border-bottom:1.6px solid var(--text-2);
  background-image:none;transform:rotate(45deg);
  transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease)
}
.faq-acc .accordion-button:not(.collapsed)::after{transform:rotate(-135deg);border-color:var(--brand)}
.faq-acc .accordion-body{padding:0 0 26px 30px;font-size:15px;line-height:1.9;color:var(--text-body)}
@media (max-width:575px){.faq-acc .accordion-body{padding-left:0}}

/* ---------- CTA band ---------- */
.cta-wrap{padding-bottom:96px}
@media (max-width:991px){.cta-wrap{padding-bottom:72px}}
@media (max-width:575px){.cta-wrap{padding-bottom:56px}}
.cta-band{
  display:flex;align-items:center;justify-content:space-between;gap:40px;
  padding:44px;border-radius:var(--r-lg);
  background:linear-gradient(135deg,rgba(44,232,182,.09),rgba(20,23,31,.9) 55%),var(--surface);
  border:1px solid rgba(44,232,182,.3);
  box-shadow:0 0 48px -24px rgba(44,232,182,.55), var(--shadow);
}
.cta-band h2{font-size:clamp(1.5rem,2.4vw,2rem);line-height:1.2;margin-bottom:10px}
.cta-band p{color:var(--text-2);font-size:.95rem;margin:0}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;flex:0 0 auto}
@media (max-width:991px){
  .cta-band{flex-direction:column;align-items:flex-start;padding:32px}
  .cta-actions{width:100%}
}
@media (max-width:575px){
  .cta-actions .btn-brand,.cta-actions .btn-ghost{width:100%}
}

/* ---------- Related categories ---------- */
.rel-section{padding:0 0 96px}
@media (max-width:991px){.rel-section{padding-bottom:72px}}
@media (max-width:575px){.rel-section{padding-bottom:56px}}
.rel-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.rel-card{
  display:flex;flex-direction:column;gap:8px;padding:22px;border-radius:14px;
  border:1px solid var(--line);background:var(--surface);color:var(--text-1);font-weight:600;font-size:1rem;
  box-shadow:var(--shadow);
  transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease),color var(--dur) var(--ease),box-shadow var(--dur) var(--ease)
}
.rel-card span{font-size:13px;font-weight:400;color:var(--text-2);line-height:1.7}
.rel-card:hover{transform:translateY(-4px);border-color:rgba(44,232,182,.4);color:var(--brand);box-shadow:var(--shadow-hover)}
.rel-card.is-current{border-color:rgba(44,232,182,.5);background:linear-gradient(180deg,rgba(44,232,182,.08),rgba(20,23,31,.9))}
@media (max-width:991px){.rel-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:575px){.rel-grid{grid-template-columns:1fr}}

/* ---------- Footer ---------- */
.site-footer{position:relative;background:var(--bg-0);border-top:1px solid var(--line);padding:64px 0 0;margin-top:0}
.site-footer::before{
  content:"";position:absolute;top:-1px;left:0;width:100%;height:1px;
  background:linear-gradient(90deg,var(--brand),rgba(44,232,182,.2) 45%,rgba(44,232,182,0));
}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;padding-bottom:48px}
.footer-brand .logo{margin-bottom:16px}
.footer-brand p{font-size:.875rem;color:var(--text-2);line-height:1.85;max-width:320px}
.site-footer h4{font-size:.875rem;color:var(--text-1);font-weight:600;margin-bottom:16px}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{font-size:.875rem;color:var(--text-2);transition:color var(--dur) var(--ease)}
.footer-links a:hover{color:var(--brand)}
.footer-qr{
  width:96px;height:96px;margin-top:18px;border:1px dashed var(--line-2);border-radius:12px;
  display:flex;align-items:center;justify-content:center;text-align:center;
  font-size:12px;color:var(--text-3);line-height:1.6;
}
.footer-bottom{
  border-top:1px solid var(--line);padding:20px 0;
  display:flex;flex-wrap:wrap;gap:12px 24px;justify-content:space-between;
  font-size:13px;color:var(--text-3);
}
.footer-bottom a{color:var(--text-2)}
.footer-bottom a:hover{color:var(--brand)}
@media (max-width:991px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .footer-brand{grid-column:1/-1}
}
@media (max-width:575px){
  .site-footer{padding-top:48px}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:32px}
}

/* ---------- Motion ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity 600ms var(--ease),transform 600ms var(--ease)}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important;scroll-behavior:auto!important}
  .reveal{opacity:1;transform:none}
}

/* roulang page: category2 */
:root{
  --bg-0:#07080B;
  --bg-1:#0C0E13;
  --bg-2:#12151C;
  --surface:#14171F;
  --surface-2:#191D27;
  --line:rgba(255,255,255,.08);
  --line-2:rgba(255,255,255,.16);
  --brand:#2CE8B6;
  --brand-deep:#0FA37D;
  --brand-glow:rgba(44,232,182,.45);
  --accent:#FF4D8D;
  --warn:#FFC24B;
  --text-1:#EEF2F6;
  --text-body:#B9C1CD;
  --text-2:#9AA3B0;
  --text-3:#646D7B;
  --r-card:16px;
  --r-img:12px;
  --r-pill:999px;
  --shadow-card:0 1px 0 rgba(255,255,255,.05) inset, 0 18px 40px -28px rgba(0,0,0,.9);
  --shadow-hover:0 0 0 1px rgba(44,232,182,.28), 0 24px 48px -28px rgba(0,0,0,1);
  --shadow-cta:0 0 24px -4px rgba(44,232,182,.5);
  --ease:cubic-bezier(.22,.61,.36,1);
  --font-sans:-apple-system,"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --bs-body-bg:var(--bg-0);
  --bs-body-color:var(--text-body);
  --bs-border-color:var(--line);
  --bs-border-radius:var(--r-card);
  --bs-border-radius-lg:var(--r-card);
  --bs-link-color:var(--brand);
  --bs-link-hover-color:#6bf3cd;
  --bs-primary:var(--brand);
  --bs-font-sans-serif:var(--font-sans);
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--text-body);
  font-family:var(--font-sans);
  font-size:1rem;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--brand);text-decoration:none;transition:color 220ms var(--ease),opacity 220ms var(--ease);}
a:hover{color:#6bf3cd;}
button{font-family:inherit;}
ul,ol{margin:0;padding:0;}
h1,h2,h3,h4,h5{margin:0;color:var(--text-1);font-weight:700;}
p{margin:0 0 1.1em;}
p:last-child{margin-bottom:0;}

::selection{background:rgba(44,232,182,.25);color:var(--text-1);}
::-webkit-scrollbar{width:8px;height:8px;}
::-webkit-scrollbar-track{background:var(--bg-1);}
::-webkit-scrollbar-thumb{background:rgba(255,255,255,.14);border-radius:8px;}
::-webkit-scrollbar-thumb:hover{background:rgba(44,232,182,.4);}

:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:4px;}

.container{width:100%;max-width:1240px;padding-left:24px;padding-right:24px;margin:0 auto;}
@media (min-width:1400px){.container{max-width:1320px;}}

/* ============ 顶部导航 ============ */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:1040;
  background:rgba(7,8,11,.72);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-top:1px solid transparent;
  transition:border-color 260ms var(--ease),background 260ms var(--ease);
}
.site-header::before{
  content:"";
  position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,var(--brand) 0%,rgba(44,232,182,.35) 32%,transparent 70%);
  opacity:.9;
}
.site-header.is-scrolled{border-bottom:1px solid var(--line);}
.header-inner{
  height:64px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
}
.logo{display:inline-flex;align-items:center;gap:10px;color:var(--text-1);font-weight:700;}
.logo:hover{color:var(--text-1);}
.logo-mark{
  width:32px;height:32px;flex:0 0 32px;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:10px;
  background:linear-gradient(140deg,rgba(44,232,182,.22),rgba(44,232,182,.04));
  border:1px solid rgba(44,232,182,.4);
  box-shadow:0 0 18px -6px var(--brand-glow);
}
.logo-mark svg{width:18px;height:18px;stroke:var(--brand);stroke-width:1.8;fill:none;stroke-linecap:round;}
.logo-text{font-size:1.0625rem;letter-spacing:.01em;font-weight:800;}

.main-nav{display:flex;align-items:center;gap:4px;}
.main-nav a{
  position:relative;
  display:inline-flex;
  align-items:center;
  height:64px;
  padding:0 14px;
  font-size:14px;
  color:var(--text-2);
  white-space:nowrap;
  transition:color 220ms var(--ease);
}
.main-nav a::after{
  content:"";
  position:absolute;left:14px;right:14px;bottom:16px;height:2px;
  border-radius:2px;
  background:var(--brand);
  opacity:0;
  transform:scaleX(.4);
  transition:opacity 220ms var(--ease),transform 220ms var(--ease);
}
.main-nav a:hover{color:var(--text-1);}
.main-nav a:hover::after{opacity:.45;transform:scaleX(1);}
.main-nav a.active{color:var(--text-1);}
.main-nav a.active::after{opacity:1;transform:scaleX(1);box-shadow:0 0 8px 1px var(--brand-glow);}

.header-actions{display:flex;align-items:center;gap:12px;}

.btn-brand{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 28px;
  border-radius:var(--r-pill);
  border:1px solid transparent;
  background:var(--brand);
  color:#06120E;
  font-size:.9375rem;font-weight:600;
  letter-spacing:.01em;
  cursor:pointer;
  box-shadow:var(--shadow-cta);
  transition:transform 220ms var(--ease),filter 220ms var(--ease),box-shadow 220ms var(--ease);
}
.btn-brand:hover{color:#06120E;filter:brightness(1.08);transform:translateY(-1px);box-shadow:0 0 32px -2px var(--brand-glow);}
.btn-brand:active{transform:translateY(0);filter:brightness(.96);}

.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;
  border-radius:var(--r-pill);
  background:transparent;
  border:1px solid var(--line-2);
  color:var(--text-1);
  font-size:.9375rem;font-weight:600;
  cursor:pointer;
  transition:all 220ms var(--ease);
}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);background:rgba(44,232,182,.06);transform:translateY(-1px);}
.btn-ghost:active{transform:translateY(0);}

.header-actions .btn-brand{height:42px;padding:0 22px;font-size:.875rem;}

.nav-toggle{
  display:none;
  width:42px;height:42px;
  align-items:center;justify-content:center;
  border-radius:12px;
  border:1px solid var(--line-2);
  background:transparent;
  color:var(--text-1);
  cursor:pointer;
  transition:all 220ms var(--ease);
}
.nav-toggle:hover{border-color:var(--brand);color:var(--brand);}

@media (max-width:991.98px){
  .main-nav{display:none;}
  .nav-toggle{display:inline-flex;}
  .header-inner{height:56px;}
  .header-actions .btn-brand{display:none;}
}

/* 移动抽屉 */
.mobile-drawer{
  width:300px !important;
  background:var(--bg-1);
  border-left:1px solid var(--line);
  color:var(--text-body);
}
.mobile-drawer .offcanvas-header{
  border-bottom:1px solid var(--line);
  padding:16px 20px;
}
.mobile-drawer .offcanvas-title{color:var(--text-1);font-size:1rem;font-weight:700;}
.mobile-drawer .btn-close{filter:invert(1) grayscale(1) brightness(2);opacity:.7;}
.mobile-drawer .offcanvas-body{padding:8px 0 24px;}
.mobile-drawer nav{display:flex;flex-direction:column;}
.mobile-drawer nav a{
  display:flex;align-items:center;
  height:52px;padding:0 20px;
  font-size:.9375rem;color:var(--text-2);
  border-left:3px solid transparent;
  transition:all 220ms var(--ease);
}
.mobile-drawer nav a:hover{color:var(--text-1);background:rgba(255,255,255,.03);}
.mobile-drawer nav a.active{
  color:var(--text-1);
  border-left-color:var(--brand);
  background:rgba(44,232,182,.06);
}
.mobile-drawer .drawer-cta{padding:20px;}

/* ============ 面包屑 ============ */
.breadcrumb-bar{padding:0 0 24px;}
.crumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--text-2);
}
.crumbs a{color:var(--text-2);}
.crumbs a:hover{color:var(--brand);}
.crumbs .sep{color:var(--text-3);}
.crumbs .current{color:var(--text-1);}

/* ============ 分类 Hero ============ */
.cat-hero{
  position:relative;
  margin-top:64px;
  min-height:320px;
  display:flex;
  align-items:center;
  background-image:linear-gradient(180deg,rgba(7,8,11,.72) 0%,rgba(7,8,11,.88) 55%,var(--bg-0) 100%),url('/assets/images/backpic/back-2.png');
  background-size:cover;
  background-position:center;
  overflow:hidden;
}
.cat-hero::before{
  content:"";
  position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:48px 48px;
  pointer-events:none;
}
.cat-hero::after{
  content:"";
  position:absolute;
  top:-160px;right:-80px;
  width:520px;height:520px;
  background:radial-gradient(circle,rgba(44,232,182,.18) 0%,transparent 68%);
  pointer-events:none;
}
.cat-hero .container{position:relative;z-index:2;padding-top:56px;padding-bottom:56px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:.75rem;letter-spacing:.18em;
  color:var(--brand);
  text-transform:uppercase;
  margin-bottom:16px;
}
.eyebrow::before{
  content:"";
  display:block;width:22px;height:2px;border-radius:2px;
  background:var(--brand);
  box-shadow:0 0 8px var(--brand-glow);
}
.cat-hero h1{
  font-size:clamp(2.5rem,5vw,4.5rem);
  line-height:1.08;
  letter-spacing:-.02em;
  font-weight:800;
  margin-bottom:16px;
}
.cat-hero .hero-lead{
  font-size:1rem;
  color:var(--text-body);
  max-width:640px;
  margin-bottom:0;
}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px;}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 14px;
  border-radius:var(--r-pill);
  border:1px solid rgba(44,232,182,.35);
  color:var(--brand);
  font-size:.75rem;
  letter-spacing:.03em;
  background:rgba(44,232,182,.05);
}
.tag.tag-accent{border-color:rgba(255,77,141,.4);color:var(--accent);background:rgba(255,77,141,.06);}
.tag.tag-muted{border-color:var(--line-2);color:var(--text-2);background:transparent;}

/* ============ 通用板块 ============ */
.section{padding:96px 0;}
.section-sm{padding:72px 0;}
.section-head{margin-bottom:48px;max-width:760px;}
.section-head h2{
  font-size:clamp(1.75rem,3vw,2.5rem);
  line-height:1.2;
  letter-spacing:-.015em;
  margin-bottom:14px;
}
.section-head p{color:var(--text-2);font-size:.9375rem;margin-bottom:0;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.divider-neon{
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(44,232,182,.5),transparent);
  border:0;margin:0;
}

/* ============ 版本通道数据条 ============ */
.stat-strip{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:0;
  border:1px solid var(--line);
  border-radius:var(--r-card);
  background:linear-gradient(180deg,var(--surface) 0%,var(--bg-1) 100%);
  overflow:hidden;
  box-shadow:var(--shadow-card);
}
.stat-item{
  padding:28px 24px;
  border-right:1px solid var(--line);
  transition:background 220ms var(--ease);
}
.stat-item:last-child{border-right:0;}
.stat-item:hover{background:rgba(44,232,182,.04);}
.stat-num{
  font-family:var(--font-mono);
  font-size:clamp(1.75rem,3vw,2.5rem);
  font-weight:900;
  letter-spacing:-.03em;
  color:var(--brand);
  line-height:1.1;
}
.stat-num .unit{font-size:.875rem;font-weight:600;color:var(--text-2);margin-left:4px;letter-spacing:0;}
.stat-label{font-size:.875rem;color:var(--text-2);margin-top:8px;}
@media (max-width:767.98px){
  .stat-strip{grid-template-columns:repeat(2,1fr);}
  .stat-item{border-right:1px solid var(--line);border-bottom:1px solid var(--line);}
  .stat-item:nth-child(2n){border-right:0;}
  .stat-item:nth-last-child(-n+2){border-bottom:0;}
}

/* ============ 安装包对比卡 ============ */
.pkg-grid{
  display:grid;
  grid-template-columns:1.15fr .85fr;
  gap:24px;
  align-items:stretch;
}
.pkg-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:28px;
  box-shadow:var(--shadow-card);
  transition:transform 220ms var(--ease),box-shadow 220ms var(--ease),border-color 220ms var(--ease);
}
.pkg-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:rgba(44,232,182,.28);}
.pkg-card h3{font-size:1.25rem;font-weight:600;margin-bottom:12px;}
.pkg-card p{font-size:.9375rem;color:var(--text-2);}
.pkg-media{
  position:relative;
  border-radius:var(--r-img);
  overflow:hidden;
  border:1px solid var(--line);
  aspect-ratio:16/9;
  margin-bottom:20px;
}
.pkg-media img{width:100%;height:100%;object-fit:cover;transition:transform 400ms var(--ease);}
.pkg-card:hover .pkg-media img{transform:scale(1.03);}
.pkg-list{list-style:none;margin-top:16px;display:flex;flex-direction:column;gap:10px;}
.pkg-list li{
  position:relative;
  padding-left:20px;
  font-size:.875rem;
  color:var(--text-body);
}
.pkg-list li::before{
  content:"";
  position:absolute;left:0;top:.68em;
  width:6px;height:6px;border-radius:2px;
  background:var(--brand);
}
.pkg-meta{
  display:flex;flex-wrap:wrap;gap:16px;
  margin-top:20px;padding-top:18px;
  border-top:1px solid var(--line);
  font-size:.8125rem;color:var(--text-3);
}
.pkg-meta strong{color:var(--text-1);font-weight:600;}
@media (max-width:991.98px){
  .pkg-grid{grid-template-columns:1fr;}
}

/* ============ 时间轴（本页主版式） ============ */
.timeline{position:relative;padding-left:0;}
.timeline::before{
  content:"";
  position:absolute;
  left:31px;top:12px;bottom:12px;
  width:1px;
  background:linear-gradient(180deg,var(--brand) 0%,rgba(44,232,182,.35) 40%,rgba(255,255,255,.08) 100%);
}
.tl-item{
  position:relative;
  display:grid;
  grid-template-columns:64px 1fr;
  gap:24px;
  padding-bottom:32px;
}
.tl-item:last-child{padding-bottom:0;}
.tl-node{
  position:relative;
  z-index:2;
  width:64px;height:64px;
  display:flex;align-items:center;justify-content:center;
  border-radius:50%;
  background:var(--bg-1);
  border:1px solid var(--line-2);
  font-family:var(--font-mono);
  font-size:1.25rem;
  font-weight:900;
  color:var(--text-2);
  letter-spacing:-.02em;
  transition:all 260ms var(--ease);
}
.tl-item:hover .tl-node{
  border-color:var(--brand);
  color:var(--brand);
  box-shadow:0 0 24px -6px var(--brand-glow);
  background:rgba(44,232,182,.06);
}
.tl-body{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:24px 28px;
  box-shadow:var(--shadow-card);
  transition:transform 220ms var(--ease),box-shadow 220ms var(--ease),border-color 220ms var(--ease);
}
.tl-item:hover .tl-body{transform:translateX(4px);box-shadow:var(--shadow-hover);border-color:rgba(44,232,182,.24);}
.tl-body h3{font-size:1.0625rem;font-weight:600;margin-bottom:10px;}
.tl-body p{font-size:.9375rem;color:var(--text-2);margin-bottom:10px;}
.tl-body p:last-of-type{margin-bottom:0;}
.tl-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px;}
.tl-tags .tag{font-size:.7rem;padding:4px 12px;}
@media (max-width:767.98px){
  .timeline::before{left:13px;}
  .tl-item{grid-template-columns:28px 1fr;gap:16px;}
  .tl-node{width:28px;height:28px;font-size:.75rem;border-radius:9px;}
  .tl-body{padding:20px;}
}

/* ============ 富文本区 ============ */
.rich{max-width:760px;}
.rich h2{
  font-size:1.5rem;
  font-weight:700;
  line-height:1.3;
  margin:40px 0 16px;
  padding-left:14px;
  position:relative;
}
.rich h2:first-child{margin-top:0;}
.rich h2::before{
  content:"";
  position:absolute;left:0;top:.18em;bottom:.18em;
  width:3px;border-radius:3px;
  background:var(--brand);
  box-shadow:0 0 10px var(--brand-glow);
}
.rich h3{font-size:1.125rem;font-weight:600;margin:28px 0 12px;}
.rich p{font-size:1.0625rem;line-height:1.9;color:var(--text-body);margin-bottom:1.2em;}
.rich ul{list-style:none;margin:0 0 1.2em;display:flex;flex-direction:column;gap:10px;}
.rich ul li{
  position:relative;
  padding-left:22px;
  font-size:1.0625rem;
  line-height:1.9;
  color:var(--text-body);
}
.rich ul li::before{
  content:"";
  position:absolute;left:0;top:.75em;
  width:6px;height:6px;border-radius:2px;
  background:var(--brand);
}
.rich blockquote{
  margin:24px 0;
  padding:20px 24px;
  border-left:3px solid var(--brand);
  background:rgba(44,232,182,.06);
  border-radius:0 var(--r-img) var(--r-img) 0;
  color:var(--text-body);
  font-size:1rem;
}
.rich blockquote p:last-child{margin-bottom:0;}
.rich figure{margin:24px 0;}
.rich figure img{width:100%;border-radius:var(--r-img);border:1px solid var(--line);}
.rich figcaption{font-size:.8125rem;color:var(--text-3);margin-top:12px;text-align:center;}

.split-rich{
  display:grid;
  grid-template-columns:minmax(0,1fr) 380px;
  gap:48px;
  align-items:start;
}
.side-note{
  position:sticky;
  top:96px;
  background:var(--surface-2);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:28px;
  box-shadow:var(--shadow-card);
}
.side-note h4{font-size:1rem;font-weight:600;margin-bottom:16px;}
.side-note ul{list-style:none;display:flex;flex-direction:column;gap:14px;}
.side-note li{
  font-size:.875rem;
  color:var(--text-2);
  padding-bottom:14px;
  border-bottom:1px dashed var(--line);
}
.side-note li:last-child{border-bottom:0;padding-bottom:0;}
.side-note li strong{display:block;color:var(--text-1);font-weight:600;font-size:.9375rem;margin-bottom:2px;}
@media (max-width:991.98px){
  .split-rich{grid-template-columns:1fr;gap:32px;}
  .side-note{position:static;}
}

/* ============ FAQ ============ */
.faq-wrap{max-width:880px;}
.faq-item{
  border-bottom:1px solid var(--line);
}
.faq-item:first-child{border-top:1px solid var(--line);}
.faq-btn{
  width:100%;
  display:flex;
  align-items:flex-start;
  gap:18px;
  padding:24px 0;
  background:transparent;
  border:0;
  text-align:left;
  cursor:pointer;
  color:var(--text-1);
  font-size:1.0625rem;
  font-weight:600;
  line-height:1.6;
  transition:color 220ms var(--ease);
}
.faq-btn:hover{color:var(--brand);}
.faq-idx{
  font-family:var(--font-mono);
  font-size:.8125rem;
  color:var(--text-3);
  padding-top:.35em;
  flex:0 0 28px;
  transition:color 220ms var(--ease);
}
.faq-btn[aria-expanded="true"] .faq-idx{color:var(--brand);}
.faq-q{flex:1;}
.faq-chev{
  flex:0 0 auto;
  width:20px;height:20px;
  margin-top:.3em;
  transition:transform 260ms var(--ease);
}
.faq-chev path{stroke:var(--text-2);stroke-width:1.8;fill:none;stroke-linecap:round;stroke-linejoin:round;transition:stroke 220ms var(--ease);}
.faq-btn[aria-expanded="true"] .faq-chev{transform:rotate(180deg);}
.faq-btn[aria-expanded="true"] .faq-chev path{stroke:var(--brand);}
.faq-body{
  padding:0 0 24px 46px;
  font-size:.9375rem;
  line-height:1.9;
  color:var(--text-body);
  max-width:720px;
}
.faq-item.open{border-left:0;}

/* ============ 相关分类互链 ============ */
.rel-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:20px;
}
.rel-card{
  display:block;
  padding:24px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--shadow-card);
  transition:transform 220ms var(--ease),box-shadow 220ms var(--ease),border-color 220ms var(--ease);
}
.rel-card:hover{
  transform:translateY(-4px);
  border-color:rgba(44,232,182,.3);
  box-shadow:var(--shadow-hover);
}
.rel-card .rel-idx{
  font-family:var(--font-mono);
  font-size:.75rem;
  color:var(--text-3);
  letter-spacing:.1em;
}
.rel-card h3{font-size:1.0625rem;font-weight:600;margin:12px 0 8px;color:var(--text-1);transition:color 220ms var(--ease);}
.rel-card:hover h3{color:var(--brand);}
.rel-card p{font-size:.875rem;color:var(--text-2);margin:0;}
@media (max-width:991.98px){.rel-grid{grid-template-columns:repeat(2,1fr);}}
@media (max-width:575.98px){.rel-grid{grid-template-columns:1fr;}}

/* ============ 下载 CTA ============ */
.cta-band{
  position:relative;
  border-radius:20px;
  border:1px solid rgba(44,232,182,.3);
  background:linear-gradient(135deg,var(--surface) 0%,var(--bg-2) 100%);
  padding:48px;
  overflow:hidden;
  box-shadow:0 0 60px -30px var(--brand-glow);
}
.cta-band::after{
  content:"";
  position:absolute;
  top:-120px;right:-60px;
  width:400px;height:400px;
  background:radial-gradient(circle,rgba(44,232,182,.14) 0%,transparent 70%);
  pointer-events:none;
}
.cta-inner{
  position:relative;
  z-index:2;
  display:grid;
  grid-template-columns:1fr auto;
  gap:32px;
  align-items:center;
}
.cta-inner h2{font-size:clamp(1.5rem,2.4vw,2rem);line-height:1.25;margin-bottom:10px;}
.cta-inner p{color:var(--text-2);font-size:.9375rem;margin:0;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center;}
.cta-qr{
  width:96px;height:96px;
  border:1px solid var(--line-2);
  border-radius:var(--r-img);
  display:flex;align-items:center;justify-content:center;
  text-align:center;
  font-size:.6875rem;
  line-height:1.5;
  color:var(--text-3);
  flex:0 0 96px;
}
@media (max-width:991.98px){
  .cta-band{padding:32px;}
  .cta-inner{grid-template-columns:1fr;}
  .cta-actions{width:100%;}
  .cta-actions .btn-brand,.cta-actions .btn-ghost{width:100%;}
  .cta-qr{width:100%;height:80px;flex:none;}
}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--bg-0);
  position:relative;
  padding:64px 0 0;
  margin-top:96px;
}
.site-footer::before{
  content:"";
  position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,var(--brand) 30%,rgba(44,232,182,.3) 60%,transparent);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.1fr;
  gap:40px;
  padding-bottom:48px;
}
.footer-brand p{font-size:.875rem;color:var(--text-2);margin-top:16px;max-width:320px;}
.site-footer h4{font-size:.875rem;font-weight:600;color:var(--text-1);margin-bottom:18px;letter-spacing:.02em;}
.footer-links{display:flex;flex-direction:column;gap:12px;}
.footer-links a{font-size:.875rem;color:var(--text-2);width:fit-content;}
.footer-links a:hover{color:var(--brand);}
.footer-qr{
  margin-top:18px;
  width:96px;height:96px;
  border:1px solid var(--line-2);
  border-radius:var(--r-img);
  display:flex;align-items:center;justify-content:center;
  text-align:center;
  font-size:.6875rem;
  line-height:1.5;
  color:var(--text-3);
}
.footer-bottom{
  border-top:1px solid var(--line);
  padding:22px 0 28px;
  display:flex;
  flex-wrap:wrap;
  gap:12px 28px;
  justify-content:space-between;
  align-items:center;
  font-size:.8125rem;
  color:var(--text-3);
}
.footer-bottom a{color:var(--text-2);}
.footer-bottom a:hover{color:var(--brand);}
@media (max-width:991.98px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:575.98px){
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}

/* ============ 入场动效 ============ */
.fade-up{opacity:0;transform:translateY(16px);transition:opacity 600ms var(--ease),transform 600ms var(--ease);}
.fade-up.in{opacity:1;transform:none;}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .fade-up{opacity:1;transform:none;}
}

/* ============ 响应式补充 ============ */
@media (max-width:991.98px){
  .section{padding:72px 0;}
  .section-sm{padding:56px 0;}
  .cat-hero{margin-top:56px;}
  .cat-hero .container{padding-top:40px;padding-bottom:40px;}
  .site-footer{margin-top:72px;}
}
@media (max-width:575.98px){
  .container{padding-left:16px;padding-right:16px;}
  .section{padding:56px 0;}
  .section-sm{padding:44px 0;}
  .section-head{margin-bottom:32px;}
  .btn-brand,.btn-ghost{height:44px;padding:0 22px;font-size:.875rem;}
  .cat-hero h1{font-size:2rem;}
  .cta-band{padding:24px;}
}

/* roulang page: category3 */
:root{
  --bg-0:#07080B; --bg-1:#0C0E13; --bg-2:#12151C;
  --surface:#14171F; --surface-2:#191D27;
  --line:rgba(255,255,255,.08); --line-2:rgba(255,255,255,.16);
  --brand:#2CE8B6; --brand-deep:#0FA37D; --glow:rgba(44,232,182,.45);
  --accent:#FF4D8D; --warn:#FFC24B;
  --text-1:#EEF2F6; --text-body:#B9C1CD; --text-2:#9AA3B0; --text-3:#646D7B;
  --radius:16px; --radius-sm:12px; --pill:999px;
  --shadow:0 1px 0 rgba(255,255,255,.05) inset, 0 18px 40px -28px rgba(0,0,0,.9);
  --shadow-hover:0 0 0 1px rgba(44,232,182,.28), 0 24px 48px -28px rgba(0,0,0,1);
  --ease:220ms cubic-bezier(.22,.61,.36,1);
  --nav-h:64px;

  --bs-body-bg:#07080B;
  --bs-body-color:#B9C1CD;
  --bs-primary:#2CE8B6;
  --bs-primary-rgb:44,232,182;
  --bs-link-color:#2CE8B6;
  --bs-link-hover-color:#2CE8B6;
  --bs-border-radius:16px;
  --bs-border-radius-lg:16px;
  --bs-border-radius-sm:12px;
  --bs-secondary-color:#9AA3B0;
  --bs-emphasis-color:#EEF2F6;
  --bs-font-sans-serif:-apple-system,"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg-0);color:var(--text-body);
  font-family:-apple-system,"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  font-size:16px;line-height:1.85;-webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";position:fixed;top:0;left:0;right:0;height:1px;z-index:1100;
  background:linear-gradient(90deg,var(--brand),rgba(44,232,182,0));
}
img{max-width:100%;display:block}
a{color:var(--brand);text-decoration:none;transition:color var(--ease),border-color var(--ease),background-color var(--ease)}
a:hover{color:var(--brand)}
h1,h2,h3,h4{margin:0}
p{margin:0 0 1em}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:4px}
::selection{background:rgba(44,232,182,.28);color:#fff}
::-webkit-scrollbar{width:8px;height:8px}
::-webkit-scrollbar-track{background:var(--bg-1)}
::-webkit-scrollbar-thumb{background:rgba(255,255,255,.14);border-radius:999px}
::-webkit-scrollbar-thumb:hover{background:rgba(44,232,182,.4)}

.container, .container-fluid, .container-lg, .container-xl{width:100%;max-width:1240px;padding-inline:24px;margin-inline:auto}
@media(min-width:1400px){.container,.container-fluid,.container-lg,.container-xl{max-width:1320px}}
@media(max-width:575px){.container{padding-inline:16px}}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(7,8,11,.72);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid transparent;
  transition:border-color var(--ease),background-color var(--ease);
}
.site-header.scrolled{border-bottom-color:var(--line);background:rgba(7,8,11,.88)}
.header-inner{height:var(--nav-h);display:flex;align-items:center;gap:28px}
.logo{display:inline-flex;align-items:center;gap:10px;color:var(--text-1);font-weight:700;letter-spacing:-.01em;flex:0 0 auto}
.logo:hover{color:var(--text-1)}
.logo-mark{
  width:30px;height:30px;display:grid;place-items:center;flex:0 0 auto;
  border:1px solid var(--line-2);border-radius:9px;color:var(--brand);
  background:rgba(44,232,182,.06);
}
.logo-mark svg{width:17px;height:17px;stroke:currentColor;stroke-width:1.7;fill:none;stroke-linecap:round}
.logo-text{font-size:16px;white-space:nowrap}
.main-nav{display:none;gap:26px;margin-left:auto}
@media(min-width:992px){.main-nav{display:flex;align-items:center}}
.main-nav a{position:relative;font-size:14px;color:var(--text-2);padding:8px 0;white-space:nowrap}
.main-nav a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;border-radius:2px;
  background:var(--brand);transform:scaleX(0);transform-origin:left;
  transition:transform var(--ease),box-shadow var(--ease),opacity var(--ease);
}
.main-nav a:hover{color:var(--text-1)}
.main-nav a:hover::after{transform:scaleX(1);opacity:.45}
.main-nav a.active{color:var(--text-1)}
.main-nav a.active::after{transform:scaleX(1);box-shadow:0 0 8px var(--glow)}
.header-actions{display:flex;align-items:center;gap:12px;margin-left:auto}
@media(min-width:992px){.header-actions{margin-left:0}}
.header-actions .btn-primary-c{height:40px;padding:0 20px;font-size:13px}
.nav-toggle{
  display:inline-flex;align-items:center;justify-content:center;
  width:40px;height:40px;border:1px solid var(--line-2);border-radius:10px;
  background:transparent;color:var(--text-1);transition:all var(--ease);
}
.nav-toggle:hover{border-color:var(--brand);color:var(--brand)}
.nav-toggle i{display:block;width:16px;height:0;position:relative}
.nav-toggle i::before,.nav-toggle i::after,.nav-toggle i{
  content:"";position:absolute;left:0;width:16px;height:1.5px;background:currentColor;border-radius:2px;
}
.nav-toggle i{position:relative;background:currentColor}
.nav-toggle i::before{top:-5px}
.nav-toggle i::after{top:5px}
@media(min-width:992px){.nav-toggle{display:none}}
@media(max-width:991px){.header-inner{height:56px;gap:14px}}

/* ---------- buttons ---------- */
.btn-primary-c{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 28px;border:0;border-radius:var(--pill);
  background:var(--brand);color:#06120E;font-size:14px;font-weight:600;
  transition:transform var(--ease),box-shadow var(--ease),filter var(--ease),color var(--ease);
  box-shadow:0 0 24px -4px rgba(44,232,182,.5);white-space:nowrap;
}
.btn-primary-c:hover{color:#06120E;filter:brightness(1.08);transform:translateY(-1px);box-shadow:0 0 32px -2px rgba(44,232,182,.62)}
.btn-primary-c:active{transform:translateY(0)}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;border-radius:var(--pill);
  background:transparent;border:1px solid var(--line-2);color:var(--text-1);
  font-size:14px;font-weight:600;transition:all var(--ease);white-space:nowrap;
}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);background:rgba(44,232,182,.06);transform:translateY(-1px)}
@media(max-width:575px){
  .btn-primary-c,.btn-ghost{height:44px;padding:0 20px;width:100%}
  .header-actions .btn-primary-c{display:none}
}

/* ---------- hero ---------- */
.cat-hero{
  position:relative;overflow:hidden;display:flex;align-items:center;
  min-height:320px;padding:64px 0 56px;
  background-image:linear-gradient(180deg,rgba(7,8,11,.70),rgba(7,8,11,.95)),url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;
}
.cat-hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:48px 48px;
  -webkit-mask-image:linear-gradient(180deg,#000,transparent 88%);
  mask-image:linear-gradient(180deg,#000,transparent 88%);
}
.cat-hero::after{
  content:"";position:absolute;top:-46%;left:50%;width:760px;height:760px;transform:translateX(-50%);
  background:radial-gradient(circle,rgba(44,232,182,.16),transparent 62%);pointer-events:none;
}
.cat-hero .container{position:relative;z-index:2}
.breadcrumb-c{display:flex;flex-wrap:wrap;gap:8px;font-size:13px;color:var(--text-2);margin-bottom:24px}
.breadcrumb-c a{color:var(--text-2)}
.breadcrumb-c a:hover{color:var(--brand)}
.breadcrumb-c .sep{color:var(--text-3)}
.breadcrumb-c .current{color:var(--text-1)}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;margin-bottom:16px;
  font-size:12px;letter-spacing:.18em;color:var(--brand);text-transform:uppercase;
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--brand);display:block}
h1{
  font-size:clamp(2.2rem,4.6vw,3.5rem);line-height:1.1;font-weight:800;
  letter-spacing:-.02em;color:var(--text-1);margin-bottom:16px;
}
.hero-desc{max-width:640px;font-size:16px;color:var(--text-2);margin:0}
@media(max-width:575px){.cat-hero{padding:48px 0 40px;min-height:auto}}

/* ---------- section ---------- */
.section{padding:96px 0}
@media(max-width:991px){.section{padding:72px 0}}
@media(max-width:575px){.section{padding:56px 0}}
.section-head{max-width:740px;margin-bottom:40px}
.section-head .eyebrow{margin-bottom:14px}
.section-head h2{
  font-size:clamp(1.75rem,3vw,2.5rem);line-height:1.2;font-weight:700;
  color:var(--text-1);letter-spacing:-.01em;margin-bottom:12px;
}
.section-head p{margin:0;color:var(--text-2);font-size:15px}

/* ---------- stats ---------- */
.stats-grid{display:grid;grid-template-columns:1fr;gap:24px}
@media(min-width:576px){.stats-grid{grid-template-columns:repeat(3,1fr)}}
.stat{
  position:relative;overflow:hidden;padding:28px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.stat:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:rgba(44,232,182,.28)}
.stat-num{
  font-size:clamp(2.5rem,6vw,4rem);line-height:1;font-weight:900;letter-spacing:-.03em;
  color:var(--brand);font-variant-numeric:tabular-nums;
}
.stat-num small{font-size:.38em;font-weight:600;color:var(--text-2);margin-left:6px;letter-spacing:0}
.stat-label{margin-top:14px;font-size:14px;color:var(--text-2)}
.stat::after{
  content:"";position:absolute;right:-60px;bottom:-80px;width:190px;height:190px;
  background:radial-gradient(circle,rgba(44,232,182,.14),transparent 70%);
}

/* ---------- horizontal track ---------- */
.h-track{
  display:flex;gap:20px;overflow-x:auto;scroll-snap-type:x mandatory;
  padding:6px 6px 22px;margin-inline:-6px;scrollbar-width:thin;
  scrollbar-color:rgba(255,255,255,.18) transparent;
}
.h-track::-webkit-scrollbar{height:6px}
.h-track::-webkit-scrollbar-track{background:rgba(255,255,255,.04);border-radius:999px}
.h-track::-webkit-scrollbar-thumb{background:rgba(255,255,255,.18);border-radius:999px}
.h-track::-webkit-scrollbar-thumb:hover{background:rgba(44,232,182,.5)}
.h-card{
  flex:0 0 min(340px,80vw);scroll-snap-align:start;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px;box-shadow:var(--shadow);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.h-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:rgba(44,232,182,.28)}
.h-card .thumb{
  aspect-ratio:16/9;overflow:hidden;border-radius:var(--radius-sm);
  border:1px solid var(--line);background:var(--bg-2);margin-bottom:18px;
}
.h-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform 400ms cubic-bezier(.22,.61,.36,1)}
.h-card:hover .thumb img{transform:scale(1.03)}
.h-card h3{font-size:1.0625rem;font-weight:600;color:var(--text-1);margin:14px 0 8px}
.h-card p{margin:0;font-size:14px;line-height:1.75;color:var(--text-2)}
.badge-c{
  display:inline-flex;align-items:center;gap:6px;font-size:12px;line-height:1;
  padding:6px 12px;border-radius:var(--pill);
  border:1px solid rgba(44,232,182,.35);color:var(--brand);background:rgba(44,232,182,.06);
}
.badge-c.accent{border-color:rgba(255,77,141,.4);color:var(--accent);background:rgba(255,77,141,.06)}
.track-hint{margin:8px 0 0;font-size:13px;color:var(--text-3)}

/* ---------- rich text ---------- */
.rich{max-width:820px}
.rich h2{
  font-size:clamp(1.4rem,2.4vw,1.9rem);font-weight:700;line-height:1.3;color:var(--text-1);
  padding-left:14px;border-left:3px solid var(--brand);margin:0 0 18px;
}
.rich h2 + p{margin-top:0}
.rich h2:not(:first-child){margin-top:44px}
.rich p{font-size:1.0625rem;line-height:1.9;color:var(--text-body);margin:0 0 1.2em}
.rich ul{list-style:none;margin:0 0 1.4em;padding:0}
.rich ul li{position:relative;padding-left:20px;margin-bottom:10px;color:var(--text-body);font-size:1.0625rem;line-height:1.85}
.rich ul li::before{content:"";position:absolute;left:0;top:.72em;width:6px;height:6px;border-radius:1px;background:var(--brand)}
.rich blockquote{
  margin:24px 0;padding:20px 22px;border-left:3px solid var(--brand);
  border-radius:0 var(--radius-sm) var(--radius-sm) 0;
  background:rgba(44,232,182,.06);color:var(--text-body);
}
.rich blockquote p:last-child{margin:0}
.spec-list{margin:36px 0 0;border-top:1px solid var(--line)}
.spec-row{display:flex;justify-content:space-between;gap:16px;padding:14px 0;border-bottom:1px solid var(--line)}
.spec-row dt{font-size:14px;font-weight:400;color:var(--text-2)}
.spec-row dd{margin:0;font-size:14px;color:var(--text-1);text-align:right}
@media(max-width:767px){
  .spec-row{flex-direction:column;gap:4px}
  .spec-row dd{text-align:left}
}

/* ---------- faq ---------- */
.faq-acc{
  max-width:920px;
  --bs-accordion-bg:transparent;
  --bs-accordion-color:var(--text-body);
  --bs-accordion-border-color:transparent;
  --bs-accordion-border-width:0;
  --bs-accordion-border-radius:0;
  --bs-accordion-inner-border-radius:0;
  --bs-accordion-btn-color:var(--text-1);
  --bs-accordion-btn-bg:transparent;
  --bs-accordion-btn-focus-box-shadow:none;
  --bs-accordion-btn-focus-border-color:transparent;
  --bs-accordion-active-color:var(--text-1);
  --bs-accordion-active-bg:transparent;
  --bs-accordion-btn-icon:none;
  --bs-accordion-btn-active-icon:none;
}
.faq-acc .accordion-item{background:transparent;border:0;border-bottom:1px solid var(--line)}
.faq-acc .accordion-item:first-child{border-top:1px solid var(--line)}
.faq-acc .accordion-button{
  position:relative;background:transparent;border:0;box-shadow:none;border-radius:0;
  padding:22px 0 22px 18px;font-size:16px;font-weight:600;color:var(--text-1);
  display:flex;align-items:center;gap:14px;line-height:1.6;
}
.faq-acc .accordion-button:not(.collapsed){color:var(--text-1);background:transparent;box-shadow:none}
.faq-acc .accordion-button:hover{color:var(--brand)}
.faq-acc .accordion-button:focus{box-shadow:none;border-color:transparent;z-index:auto}
.faq-acc .accordion-button::before{
  content:"";position:absolute;left:0;top:20px;bottom:20px;width:2px;border-radius:2px;
  background:transparent;transition:background var(--ease);
}
.faq-acc .accordion-button:not(.collapsed)::before{background:var(--brand)}
.faq-acc .accordion-button::after{
  width:9px;height:9px;flex:0 0 auto;margin-left:auto;
  border-right:1.6px solid var(--text-2);border-bottom:1.6px solid var(--text-2);
  background-image:none;transform:rotate(45deg) translate(-1px,-1px);
  transition:transform var(--ease),border-color var(--ease);
}
.faq-acc .accordion-button:not(.collapsed)::after{
  transform:rotate(-135deg) translate(-1px,-1px);border-color:var(--brand);
}
.faq-idx{
  font-size:12px;letter-spacing:.1em;color:var(--text-3);
  font-variant-numeric:tabular-nums;flex:0 0 auto;transition:color var(--ease);
}
.faq-acc .accordion-button:not(.collapsed) .faq-idx{color:var(--brand)}
.faq-acc .accordion-body{
  padding:0 0 26px 18px;font-size:15px;line-height:1.9;color:var(--text-body);max-width:800px;
}

/* ---------- cta ---------- */
.cta-band{
  background:var(--surface);border:1px solid rgba(44,232,182,.3);border-radius:20px;
  padding:40px;box-shadow:0 0 44px -22px rgba(44,232,182,.55);
}
.cta-inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:28px}
.cta-inner h2{font-size:clamp(1.4rem,2.4vw,1.9rem);font-weight:700;color:var(--text-1);line-height:1.3;margin-bottom:10px}
.cta-inner p{margin:0;font-size:15px;color:var(--text-2);max-width:520px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px}
@media(max-width:767px){
  .cta-band{padding:28px 22px}
  .cta-actions{width:100%}
}

/* ---------- related categories ---------- */
.cat-links{display:grid;grid-template-columns:1fr;gap:16px}
@media(min-width:576px){.cat-links{grid-template-columns:repeat(2,1fr)}}
@media(min-width:992px){.cat-links{grid-template-columns:repeat(4,1fr)}}
.cat-link{
  display:block;padding:22px;border:1px solid var(--line);border-radius:14px;
  background:var(--surface);color:var(--text-1);font-size:15px;font-weight:600;
  box-shadow:var(--shadow);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease),color var(--ease);
}
.cat-link:hover{transform:translateY(-4px);border-color:rgba(44,232,182,.3);box-shadow:var(--shadow-hover);color:var(--brand)}
.cat-link span{display:block;margin-top:8px;font-size:13px;font-weight:400;color:var(--text-3)}

/* ---------- footer ---------- */
.site-footer{position:relative;background:var(--bg-0);border-top:1px solid var(--line);padding-top:64px}
.site-footer::before{
  content:"";position:absolute;top:-1px;left:0;right:0;height:1px;opacity:.5;
  background:linear-gradient(90deg,transparent,var(--brand),transparent);
}
.footer-grid{display:grid;grid-template-columns:1fr;gap:36px;padding-bottom:48px}
@media(min-width:576px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:992px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px}}
.footer-brand p{margin:16px 0 0;font-size:14px;color:var(--text-2);line-height:1.8;max-width:330px}
.site-footer h4{font-size:14px;font-weight:600;color:var(--text-1);margin-bottom:16px}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{font-size:14px;color:var(--text-2)}
.footer-links a:hover{color:var(--brand)}
.footer-qr{
  margin-top:18px;width:98px;height:98px;border:1px dashed var(--line-2);border-radius:12px;
  display:grid;place-items:center;text-align:center;font-size:12px;line-height:1.5;color:var(--text-3);
}
.footer-bottom{
  border-top:1px solid var(--line);padding:22px 0;display:flex;flex-wrap:wrap;
  gap:8px 24px;justify-content:space-between;font-size:13px;color:var(--text-3);
}
.footer-bottom a{color:var(--text-2)}
.footer-bottom a:hover{color:var(--brand)}

/* ---------- offcanvas ---------- */
.offcanvas.mobile-nav{
  width:300px;background:var(--bg-1);border-left:1px solid var(--line);color:var(--text-body);
}
.mobile-nav .offcanvas-header{border-bottom:1px solid var(--line);padding:16px 20px}
.mobile-nav-list{display:flex;flex-direction:column;margin:10px 0 24px}
.mobile-nav-list a{
  display:flex;align-items:center;height:52px;padding:0 18px;font-size:15px;
  color:var(--text-2);border-left:3px solid transparent;transition:all var(--ease);
}
.mobile-nav-list a:hover{color:var(--text-1);background:rgba(255,255,255,.03)}
.mobile-nav-list a.active{color:var(--text-1);border-left-color:var(--brand);background:rgba(44,232,182,.05)}

/* ---------- motion ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity 600ms cubic-bezier(.22,.61,.36,1),transform 600ms cubic-bezier(.22,.61,.36,1)}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion: reduce){
  *{animation:none !important;transition:none !important}
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none}
}

/* roulang page: category4 */
:root{
  --bg-0:#07080B;--bg-1:#0C0E13;--bg-2:#12151C;
  --surface:#14171F;--surface-2:#191D27;
  --line:rgba(255,255,255,.08);--line-2:rgba(255,255,255,.16);
  --brand:#2CE8B6;--brand-deep:#0FA37D;--glow:rgba(44,232,182,.45);
  --accent:#FF4D8D;--warn:#FFC24B;
  --text-1:#EEF2F6;--text-body:#B9C1CD;--text-2:#9AA3B0;--text-3:#646D7B;
  --r-card:16px;--r-img:12px;--pill:999px;--r-input:12px;
  --shadow:inset 0 1px 0 rgba(255,255,255,.05),0 18px 40px -28px rgba(0,0,0,.9);
  --shadow-hover:0 0 0 1px rgba(44,232,182,.28),0 24px 48px -28px rgba(0,0,0,1);
  --ease:cubic-bezier(.22,.61,.36,1);--tx:220ms cubic-bezier(.22,.61,.36,1);
  --sec-y:96px;
  --bs-body-bg:var(--bg-0);--bs-body-color:var(--text-body);
  --bs-primary:var(--brand);--bs-border-radius:var(--r-card);
  --bs-link-color:var(--brand);--bs-link-hover-color:#69f5cd;
  --bs-font-sans-serif:-apple-system,"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  --bs-body-font-family:-apple-system,"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg-0);color:var(--text-body);
  font-family:-apple-system,"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  font-size:16px;line-height:1.85;-webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--brand);text-decoration:none;transition:color var(--tx)}
a:hover{color:#69f5cd}
button{font:inherit}
h1,h2,h3,h4{color:var(--text-1);margin:0;font-weight:700;letter-spacing:-.01em}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:4px}
::selection{background:rgba(44,232,182,.32);color:#fff}
::-webkit-scrollbar{width:8px;height:8px}
::-webkit-scrollbar-track{background:var(--bg-1)}
::-webkit-scrollbar-thumb{background:rgba(255,255,255,.14);border-radius:8px}
::-webkit-scrollbar-thumb:hover{background:rgba(44,232,182,.4)}

.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px}
@media (min-width:1400px){.container{max-width:1320px}}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(7,8,11,.72);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid transparent;transition:border-color var(--tx),background var(--tx);
}
.site-header.is-scrolled{border-bottom-color:var(--line);background:rgba(7,8,11,.9)}
.neon-topline{height:1px;width:100%;background:linear-gradient(90deg,var(--brand),rgba(44,232,182,0) 62%)}
.header-inner{display:flex;align-items:center;gap:28px;height:64px}
.logo{display:inline-flex;align-items:center;gap:10px;color:var(--text-1);font-weight:700}
.logo:hover{color:var(--text-1)}
.logo-mark{width:30px;height:30px;border-radius:9px;display:grid;place-items:center;
  background:linear-gradient(145deg,rgba(44,232,182,.22),rgba(44,232,182,.04));
  border:1px solid rgba(44,232,182,.35);box-shadow:0 0 18px -6px var(--glow);flex:0 0 auto}
.logo-mark svg{width:18px;height:18px;fill:none;stroke:var(--brand);stroke-width:1.6;stroke-linecap:round}
.logo-text{font-size:17px;letter-spacing:.01em;white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:26px;margin-left:auto}
.main-nav a{position:relative;font-size:14px;color:var(--text-2);padding:6px 2px}
.main-nav a::after{content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;border-radius:2px;
  background:var(--brand);transform:scaleX(0);transform-origin:center;transition:transform var(--tx)}
.main-nav a:hover{color:var(--text-1)}
.main-nav a:hover::after{transform:scaleX(1);opacity:.55}
.main-nav a.active{color:var(--text-1)}
.main-nav a.active::after{transform:scaleX(1);box-shadow:0 0 8px var(--glow)}
.header-actions{display:flex;align-items:center;gap:12px}
.btn-neon{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 28px;border-radius:var(--pill);border:1px solid transparent;
  background:var(--brand);color:#06120E;font-weight:600;font-size:15px;
  box-shadow:0 0 24px -4px rgba(44,232,182,.5);transition:all var(--tx);white-space:nowrap;cursor:pointer}
.btn-neon:hover{color:#06120E;filter:brightness(1.08);transform:translateY(-1px);box-shadow:0 0 30px -2px rgba(44,232,182,.62)}
.btn-neon.btn-sm{height:40px;padding:0 20px;font-size:14px;box-shadow:0 0 18px -6px rgba(44,232,182,.5)}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;border-radius:var(--pill);
  background:transparent;border:1px solid var(--line-2);color:var(--text-1);
  font-weight:600;font-size:15px;transition:all var(--tx);white-space:nowrap;cursor:pointer}
.btn-ghost:hover{color:var(--brand);border-color:var(--brand);background:rgba(44,232,182,.06)}
.btn-block{width:100%}
.nav-toggle{display:none;width:42px;height:42px;border-radius:12px;border:1px solid var(--line-2);
  background:transparent;padding:0;place-items:center;gap:4px;cursor:pointer}
.nav-toggle span{display:block;width:17px;height:1.6px;background:var(--text-1);border-radius:2px;margin:0 auto}
.nav-toggle span+span{margin-top:4px}

/* drawer */
.mobile-drawer{background:var(--bg-1)!important;color:var(--text-body);width:300px!important;border-left:1px solid var(--line)}
.mobile-drawer .offcanvas-header{padding:18px 20px;border-bottom:1px solid var(--line)}
.mobile-drawer .logo-text{font-size:16px;color:var(--text-1)}
.btn-close-drawer{background:none;border:0;color:var(--text-2);font-size:26px;line-height:1;padding:0 4px;cursor:pointer}
.btn-close-drawer:hover{color:var(--brand)}
.drawer-nav{display:flex;flex-direction:column;margin:8px 0 20px}
.drawer-nav a{height:52px;display:flex;align-items:center;padding:0 20px;color:var(--text-2);font-size:15px;
  border-left:3px solid transparent;transition:all var(--tx)}
.drawer-nav a:hover{color:var(--text-1);background:rgba(255,255,255,.03)}
.drawer-nav a.active{color:var(--text-1);border-left-color:var(--brand);background:rgba(44,232,182,.05)}

/* ---------- hero ---------- */
.cat-hero{position:relative;min-height:320px;display:flex;align-items:center;overflow:hidden;
  border-bottom:1px solid var(--line);padding:64px 0 56px}
.cat-hero-bg{position:absolute;inset:0;
  background:url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  filter:saturate(.7) brightness(.42);transform:scale(1.02)}
.cat-hero-bg::after{content:"";position:absolute;inset:0;
  background:
    radial-gradient(760px 300px at 18% 0%,rgba(44,232,182,.22),transparent 70%),
    repeating-linear-gradient(0deg,rgba(255,255,255,.04) 0 1px,transparent 1px 48px),
    repeating-linear-gradient(90deg,rgba(255,255,255,.04) 0 1px,transparent 1px 48px),
    linear-gradient(180deg,rgba(7,8,11,.5),rgba(7,8,11,.96))}
.cat-hero-inner{position:relative;z-index:1}
.breadcrumb-line{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-2);margin-bottom:22px;flex-wrap:wrap}
.breadcrumb-line a{color:var(--text-2)}
.breadcrumb-line a:hover{color:var(--brand)}
.breadcrumb-line .sep{color:var(--text-3)}
.breadcrumb-line .current{color:var(--text-1)}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:12px;letter-spacing:.18em;color:var(--brand);margin-bottom:16px}
.eyebrow-line{width:26px;height:1px;background:var(--brand);display:inline-block}
.cat-hero h1{font-size:clamp(2.1rem,4.6vw,3.6rem);line-height:1.1;font-weight:800;letter-spacing:-.02em;margin-bottom:14px}
.hero-note{color:var(--text-2);font-size:15px;max-width:640px}

/* ---------- sections ---------- */
.section{padding:var(--sec-y) 0}
.section-tight{padding-top:64px;padding-bottom:64px}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;flex-wrap:wrap}
.section-head h2{font-size:clamp(1.6rem,2.7vw,2.3rem);line-height:1.22;font-weight:700}
.section-head .sub{color:var(--text-2);font-size:15px;margin-top:10px;max-width:620px}
.section-head.center{flex-direction:column;align-items:center;text-align:center}
.tag{display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:var(--pill);
  border:1px solid rgba(44,232,182,.35);color:var(--brand);font-size:12px;letter-spacing:.04em;background:rgba(44,232,182,.05)}
.tag-accent{border-color:rgba(255,77,141,.35);color:var(--accent);background:rgba(255,77,141,.06)}

/* stats */
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.stat-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);padding:26px 24px;box-shadow:var(--shadow);transition:all var(--tx)}
.stat-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:rgba(44,232,182,.28)}
.stat-num{font-size:clamp(2.2rem,4vw,2.9rem);font-weight:900;letter-spacing:-.03em;line-height:1;color:var(--text-1)}
.stat-num em{font-style:normal;color:var(--brand);font-size:.5em;font-weight:700;margin-left:6px;letter-spacing:0}
.stat-label{margin-top:12px;font-size:15px;color:var(--text-1);font-weight:600}
.stat-desc{margin-top:6px;font-size:13.5px;color:var(--text-2);line-height:1.7}

/* flow */
.flow-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;position:relative}
.flow-card{position:relative;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:28px 24px 26px;box-shadow:var(--shadow);transition:all var(--tx)}
.flow-card:hover{transform:translateY(-4px);border-color:rgba(44,232,182,.28);box-shadow:var(--shadow-hover)}
.flow-idx{font-size:2.4rem;font-weight:900;letter-spacing:-.03em;line-height:1;color:rgba(44,232,182,.85)}
.flow-card h3{font-size:1.0625rem;font-weight:600;margin:14px 0 8px}
.flow-card p{font-size:14px;color:var(--text-2);line-height:1.75}

/* main support layout */
.support-layout{display:grid;grid-template-columns:250px minmax(0,1fr);gap:40px;align-items:start}
.anchor-col{position:sticky;top:96px}
.anchor-title{font-size:12px;letter-spacing:.18em;color:var(--text-3);margin-bottom:14px}
.anchor-nav{display:flex;flex-direction:column;gap:2px;border-left:1px solid var(--line);padding-left:0}
.anchor-link{display:block;padding:10px 14px;font-size:14.5px;color:var(--text-2);border-left:2px solid transparent;
  margin-left:-1px;transition:all var(--tx)}
.anchor-link:hover{color:var(--text-1);background:rgba(255,255,255,.03)}
.anchor-link.active{color:var(--brand);border-left-color:var(--brand);background:rgba(44,232,182,.05)}
.acc-group{margin-bottom:46px}
.acc-group:last-child{margin-bottom:0}
.acc-group-head{display:flex;align-items:center;gap:12px;margin-bottom:18px}
.acc-group-head h2{font-size:1.4rem;font-weight:700}
.acc-group-head span.count{font-size:12px;color:var(--text-3);border:1px solid var(--line);border-radius:var(--pill);padding:2px 10px}
.acc-intro{font-size:14.5px;color:var(--text-2);margin:-6px 0 18px;line-height:1.8}

/* accordion */
.faq-acc .accordion-item{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  margin-bottom:12px;overflow:hidden;box-shadow:var(--shadow)}
.faq-acc .accordion-item:last-child{margin-bottom:0}
.faq-acc .accordion-button{
  background:transparent;color:var(--text-1);font-size:15.5px;font-weight:600;line-height:1.6;
  padding:20px 52px 20px 22px;border:0;box-shadow:none;transition:all var(--tx)}
.faq-acc .accordion-button:hover{color:var(--brand)}
.faq-acc .accordion-button:not(.collapsed){color:var(--brand);background:rgba(44,232,182,.05);box-shadow:none}
.faq-acc .accordion-button:focus{box-shadow:0 0 0 3px rgba(44,232,182,.18);border-radius:12px}
.faq-acc .accordion-button::after{
  content:"";width:10px;height:10px;margin-left:auto;background-image:none!important;
  border-right:2px solid var(--text-2);border-bottom:2px solid var(--text-2);
  transform:rotate(45deg);transition:transform var(--tx),border-color var(--tx)}
.faq-acc .accordion-button:not(.collapsed)::after{transform:rotate(-135deg);border-color:var(--brand)}
.faq-acc .accordion-body{padding:0 22px 22px;font-size:14.8px;line-height:1.9;color:var(--text-body);border-top:1px solid var(--line);padding-top:18px}
.faq-acc .accordion-body strong{color:var(--text-1);font-weight:600}

/* scene cards */
.scene-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.scene-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;
  box-shadow:var(--shadow);transition:all var(--tx);display:flex;flex-direction:column}
.scene-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:rgba(44,232,182,.28)}
.card-media{aspect-ratio:16/9;overflow:hidden;background:var(--bg-2)}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform 400ms var(--ease)}
.scene-card:hover .card-media img{transform:scale(1.03)}
.scene-body{padding:22px}
.scene-body h3{font-size:1.0625rem;font-weight:600;margin-bottom:8px}
.scene-body p{font-size:14px;color:var(--text-2);line-height:1.75}

/* category links */
.cat-links{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.cat-link{display:block;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--shadow);transition:all var(--tx);color:var(--text-body)}
.cat-link:hover{transform:translateY(-4px);border-color:rgba(44,232,182,.35);box-shadow:var(--shadow-hover);color:var(--text-body)}
.cat-link h3{font-size:1.0625rem;font-weight:600;margin-bottom:8px;color:var(--text-1)}
.cat-link:hover h3{color:var(--brand)}
.cat-link p{font-size:13.5px;color:var(--text-2);line-height:1.75}
.cat-link .now{margin-top:14px;display:inline-block}

/* CTA band */
.cta-band{position:relative;overflow:hidden;border-radius:20px;border:1px solid rgba(44,232,182,.3);
  box-shadow:0 0 40px -18px var(--glow);padding:48px}
.cta-band-bg{position:absolute;inset:0;background:url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  filter:saturate(.6) brightness(.35)}
.cta-band-bg::after{content:"";position:absolute;inset:0;
  background:radial-gradient(600px 260px at 12% 20%,rgba(44,232,182,.2),transparent 70%),
  linear-gradient(90deg,rgba(7,8,11,.92),rgba(7,8,11,.78))}
.cta-inner{position:relative;z-index:1;display:flex;align-items:center;justify-content:space-between;gap:36px;flex-wrap:wrap}
.cta-inner h2{font-size:clamp(1.5rem,2.4vw,2rem);margin-bottom:10px}
.cta-inner p{color:var(--text-2);font-size:15px;max-width:560px}
.cta-actions{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.qr-box{width:92px;height:92px;border:1px dashed var(--line-2);border-radius:14px;display:grid;place-items:center;
  text-align:center;font-size:12px;color:var(--text-3);line-height:1.5;background:rgba(255,255,255,.02)}

/* footer */
.site-footer{background:var(--bg-0);padding:64px 0 0;position:relative;margin-top:96px}
.site-footer::before{content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,var(--brand),transparent)}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:36px;padding-bottom:44px}
.footer-brand .logo{margin-bottom:16px}
.footer-brand p{font-size:14px;color:var(--text-2);line-height:1.8;max-width:340px}
.site-footer h4{font-size:14px;font-weight:600;color:var(--text-1);margin-bottom:16px;letter-spacing:.02em}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{font-size:14px;color:var(--text-2)}
.footer-links a:hover{color:var(--brand)}
.footer-qr{margin-top:18px;width:88px;height:88px;border:1px dashed var(--line-2);border-radius:12px;
  display:grid;place-items:center;text-align:center;font-size:12px;color:var(--text-3);line-height:1.5}
.footer-bottom{border-top:1px solid var(--line);padding:20px 0 26px;display:flex;justify-content:space-between;
  gap:16px;flex-wrap:wrap;font-size:13px;color:var(--text-3)}
.footer-bottom a{color:var(--text-3)}
.footer-bottom a:hover{color:var(--brand)}

/* animation */
.reveal{opacity:0;transform:translateY(16px);transition:opacity 600ms var(--ease),transform 600ms var(--ease)}
.reveal.is-visible{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1!important;transform:none!important;transition:none!important}
  html{scroll-behavior:auto}
  *{animation-duration:.001ms!important;transition-duration:.001ms!important}
}

/* responsive */
@media (max-width:1199px){
  .main-nav{gap:20px}
  .scene-grid{grid-template-columns:repeat(2,1fr)}
  .cat-links{grid-template-columns:repeat(2,1fr)}
  .stat-grid{grid-template-columns:repeat(2,1fr)}
  .flow-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:991px){
  :root{--sec-y:72px}
  .main-nav{display:none}
  .nav-toggle{display:grid}
  .header-inner{height:56px;gap:16px}
  .header-actions{margin-left:auto}
  .support-layout{grid-template-columns:1fr;gap:28px}
  .anchor-col{position:static}
  .anchor-nav{flex-direction:row;overflow-x:auto;border-left:0;gap:8px;padding-bottom:6px}
  .anchor-link{border-left:0;border:1px solid var(--line);border-radius:var(--pill);padding:8px 16px;
    white-space:nowrap;font-size:13.5px}
  .anchor-link.active{border-color:rgba(44,232,182,.45);background:rgba(44,232,182,.08)}
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:28px}
  .cta-band{padding:36px 28px}
}
@media (max-width:767px){
  :root{--sec-y:56px}
  .container{padding:0 16px}
  .cat-hero{min-height:0;padding:40px 0 36px}
  .section-tight{padding-top:48px;padding-bottom:48px}
  .scene-grid,.cat-links,.stat-grid,.flow-grid{grid-template-columns:1fr}
  .section-head{margin-bottom:28px}
  .cta-inner{flex-direction:column;align-items:flex-start;gap:24px}
  .cta-actions{width:100%}
  .cta-actions .btn-neon,.cta-actions .btn-ghost{width:100%}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;gap:8px}
}
@media (max-width:575px){
  .header-actions .btn-neon{display:none}
  .cat-hero h1{font-size:1.9rem}
}