/* roulang page: index */
:root{
  --bg-0:#0D0A18;
  --bg-1:#15102B;
  --bg-2:#1E1840;
  --line:rgba(148,132,255,.18);
  --line-strong:rgba(148,132,255,.38);
  --brand:#6B4EFF;
  --brand-hover:#5A3DEB;
  --brand-active:#4C32D6;
  --accent:#21D4C2;
  --star:#FFC24B;
  --text:#E8E6F5;
  --text-2:#A9A4C7;
  --text-3:#7A749B;
  --ok:#35D07F;
  --warn:#FF7A59;
  --invert-bg:#F7F6FD;
  --invert-text:#1A1630;
  --r-sm:8px; --r-md:12px; --r-lg:16px; --r-pill:999px;
  --sh-1:0 2px 8px rgba(6,4,18,.35);
  --sh-2:0 12px 32px rgba(6,4,18,.45);
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",system-ui,sans-serif;
  --font-num:"Inter","SF Pro Display",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--text);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  padding-bottom:64px;
}
img{max-width:100%;display:block;}
a{color:var(--accent);text-decoration:none;transition:color .18s ease-out;}
a:hover{color:#5CE6D7;}
h1,h2,h3,h4,p,ul,ol{margin:0;}
ul,ol{padding-left:22px;}
p+p{margin-top:1.2em;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px;}
::selection{background:rgba(107,78,255,.45);color:#fff;}

.container{width:100%;max-width:1140px;margin:0 auto;padding:0 16px;}
@media (min-width:768px){.container{max-width:720px;}}
@media (min-width:992px){.container{max-width:960px;}}
@media (min-width:1200px){.container{max-width:1140px;}}
@media (min-width:1400px){.container{max-width:1200px;}}

.num{font-family:var(--font-num);font-variant-numeric:tabular-nums;font-feature-settings:"tnum";}

/* ---------- 装饰 ---------- */
.starfield{
  position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:radial-gradient(rgba(232,230,245,.16) 1px,transparent 1px);
  background-size:38px 38px;
  mask-image:linear-gradient(180deg,rgba(0,0,0,.9),rgba(0,0,0,0) 78%);
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.9),rgba(0,0,0,0) 78%);
}
.starfield--soft{opacity:.28;background-size:52px 52px;}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:1040;
  background:rgba(13,10,24,0);
  border-bottom:1px solid transparent;
  transition:background .22s ease-out,border-color .22s ease-out,backdrop-filter .22s ease-out;
}
.site-header.is-scrolled{
  background:rgba(13,10,24,.95);
  border-bottom-color:var(--line);
}
.nav-shell{display:flex;align-items:center;justify-content:space-between;height:72px;gap:20px;}
.brand{display:flex;align-items:center;gap:10px;max-width:168px;color:var(--text);}
.brand:hover{color:var(--text);}
.brand-mark{width:30px;height:30px;flex:0 0 30px;}
.brand-text{display:flex;flex-direction:column;line-height:1.05;}
.brand-text b{font-size:17px;font-weight:700;letter-spacing:.06em;}
.brand-text span{font-size:10px;color:var(--text-3);letter-spacing:.14em;}
.nav-links{display:flex;align-items:center;gap:28px;list-style:none;margin:0;padding:0;}
.nav-links a{
  position:relative;font-size:14px;font-weight:500;color:var(--text-2);padding:6px 0;display:inline-block;
}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--accent);
  transform:scaleX(0);transform-origin:left;transition:transform .18s ease-out;
}
.nav-links a:hover,.nav-links a.active{color:var(--text);}
.nav-links a:hover::after,.nav-links a.active::after{transform:scaleX(1);}
.nav-actions{display:flex;align-items:center;gap:12px;}
.btn{border-radius:10px;font-weight:600;transition:background .18s ease-out,color .18s ease-out,border-color .18s ease-out,transform .18s ease-out,box-shadow .18s ease-out;}
.btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px;box-shadow:none;}
.btn-brand{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  background:var(--brand);color:#fff;border:1px solid var(--brand);
  height:44px;padding:0 22px;font-size:15px;font-weight:600;
}
.btn-brand:hover{background:var(--brand-hover);border-color:var(--brand-hover);color:#fff;transform:translateY(-2px);box-shadow:var(--sh-2);}
.btn-brand:active{background:var(--brand-active);border-color:var(--brand-active);transform:translateY(0);}
.btn-brand-lg{height:48px;padding:0 28px;font-size:16px;}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  background:transparent;color:var(--text);border:1px solid var(--line-strong);
  height:44px;padding:0 20px;font-size:15px;font-weight:600;
}
.btn-ghost:hover{background:rgba(107,78,255,.12);color:var(--text);border-color:var(--accent);transform:translateY(-2px);}
.btn-ghost:active{transform:translateY(0);background:rgba(107,78,255,.2);}
.btn[disabled],.btn.disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none;}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--accent);}
.link-arrow svg{transition:transform .18s ease-out;}
.link-arrow:hover svg{transform:translateX(3px);}
.nav-burger{
  display:none;width:44px;height:44px;border:1px solid var(--line-strong);border-radius:10px;
  background:transparent;align-items:center;justify-content:center;color:var(--text);
}
@media (max-width:991px){
  .nav-links,.nav-actions{display:none;}
  .nav-burger{display:inline-flex;}
}
.offcanvas{background:var(--bg-1);color:var(--text);width:300px;}
.offcanvas-header{border-bottom:1px solid var(--line);padding:18px 20px;}
.offcanvas-body{padding:0;}
.drawer-cta{padding:20px;display:flex;flex-direction:column;gap:12px;border-bottom:1px solid var(--line);}
.drawer-cta .btn{width:100%;}
.drawer-list{list-style:none;margin:0;padding:0;}
.drawer-list a{
  display:flex;align-items:center;justify-content:space-between;
  height:52px;padding:0 20px;font-size:15px;color:var(--text);border-bottom:1px solid var(--line);
}
.drawer-list a:hover{background:rgba(107,78,255,.12);color:var(--text);}
.drawer-foot{padding:20px;font-size:13px;color:var(--text-3);line-height:1.7;}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;padding:72px 0 88px;background:var(--bg-0);}
@media (max-width:991px){.hero{padding:44px 0 64px;}}
.hero::after{
  content:"";position:absolute;right:-160px;top:-120px;width:640px;height:640px;
  border:1px solid rgba(148,132,255,.16);border-radius:50%;pointer-events:none;
}
.hero-inner{position:relative;z-index:2;display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center;}
@media (max-width:991px){.hero-inner{grid-template-columns:1fr;gap:32px;}}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;height:28px;padding:0 14px;border-radius:var(--r-pill);
  background:rgba(107,78,255,.14);border:1px solid var(--line);color:var(--accent);
  font-size:12px;letter-spacing:.06em;margin-bottom:20px;
}
.hero h1{
  font-size:clamp(28px,4.6vw,44px);font-weight:700;line-height:1.25;letter-spacing:.02em;
  color:var(--text);margin-bottom:18px;
}
.hero-sub{font-size:16px;color:var(--text-2);max-width:520px;margin-bottom:28px;}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;align-items:center;margin-bottom:26px;}
@media (max-width:575px){.hero-cta{flex-direction:column;align-items:stretch;}.hero-cta .btn{width:100%;}}
.hero-badges{display:flex;flex-wrap:wrap;gap:10px;list-style:none;margin:0;padding:0;}
.hero-badges li{
  display:inline-flex;align-items:center;gap:6px;height:30px;padding:0 14px;border-radius:var(--r-pill);
  background:var(--bg-2);border:1px solid var(--line);font-size:12.5px;color:var(--text-2);
}
.hero-badges svg{color:var(--accent);}
.hero-visual{position:relative;border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);box-shadow:var(--sh-2);}
.hero-visual img{width:100%;aspect-ratio:5/4;object-fit:cover;}
.hero-visual::after{content:"";position:absolute;inset:0;background:rgba(13,10,24,.2);}
.hero-visual figcaption{
  position:absolute;left:18px;bottom:16px;z-index:3;font-size:12.5px;color:var(--text-2);
  background:rgba(13,10,24,.72);border:1px solid var(--line);border-radius:var(--r-pill);padding:5px 14px;
}
@media (max-width:767px){.hero-visual{order:-1;}}

/* ---------- 通用板块 ---------- */
.section{padding:96px 0;position:relative;}
@media (max-width:991px){.section{padding:72px 0;}}
@media (max-width:575px){.section{padding:56px 0;}}
.section--alt{background:var(--bg-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;}
.section-head h2{font-size:clamp(22px,3vw,32px);font-weight:700;line-height:1.3;letter-spacing:.01em;}
.section-head p{font-size:14px;color:var(--text-2);margin-top:10px;max-width:640px;}
@media (max-width:767px){.section-head{flex-direction:column;align-items:flex-start;gap:14px;}}

/* ---------- 卖点 ---------- */
.feature-grid{display:grid;grid-template-columns:6fr 6fr;gap:24px;}
@media (max-width:991px){.feature-grid{grid-template-columns:1fr;}}
.card{
  background:var(--bg-2);border:1px solid var(--line);border-radius:var(--r-md);
  box-shadow:var(--sh-1);padding:24px;transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;
}
.card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:var(--line-strong);}
@media (max-width:575px){.card{padding:18px;}}
.card-index{font-family:var(--font-num);font-size:13px;letter-spacing:.08em;color:var(--accent);font-weight:600;}
.card h3{font-size:20px;font-weight:600;margin:12px 0 10px;}
.card p{font-size:14px;color:var(--text-2);}
.feature-main{display:flex;flex-direction:column;justify-content:space-between;gap:20px;}
.feature-main .feature-figure{margin-top:6px;border-radius:var(--r-md);overflow:hidden;border:1px solid var(--line);}
.feature-main .feature-figure img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.feature-side{display:flex;flex-direction:column;gap:24px;}
.feature-side .card{flex:1;display:flex;flex-direction:column;justify-content:center;}
.icon-badge{
  width:38px;height:38px;border-radius:10px;display:inline-flex;align-items:center;justify-content:center;
  background:rgba(33,212,194,.12);border:1px solid var(--line);color:var(--accent);
}

/* ---------- 场景演示 ---------- */
.demo-grid{display:grid;grid-template-columns:55fr 45fr;gap:40px;align-items:start;}
@media (max-width:991px){.demo-grid{grid-template-columns:1fr;gap:32px;}}
.panel{
  background:var(--bg-2);border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;
  box-shadow:var(--sh-1);
}
.panel-bar{display:flex;align-items:center;gap:8px;padding:14px 18px;border-bottom:1px solid var(--line);}
.panel-bar i{width:9px;height:9px;border-radius:50%;background:rgba(148,132,255,.35);display:block;}
.panel-bar i:first-child{background:rgba(255,194,75,.7);}
.panel-body{padding:22px;}
.panel-body .panel-shot{border-radius:var(--r-md);overflow:hidden;border:1px solid var(--line);margin-bottom:18px;}
.panel-body .panel-shot img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.skeleton-row{height:12px;border-radius:6px;background:rgba(148,132,255,.16);margin-bottom:12px;}
.skeleton-row.w70{width:70%;}
.skeleton-row.w45{width:45%;}
.skeleton-chips{display:flex;gap:8px;margin-top:16px;flex-wrap:wrap;}
.chip{
  height:24px;padding:0 12px;border-radius:var(--r-pill);display:inline-flex;align-items:center;
  font-size:12px;background:rgba(107,78,255,.12);color:var(--accent);border:1px solid var(--line);
}
.steps{list-style:none;margin:0;padding:0;position:relative;}
.steps li{position:relative;padding:0 0 26px 34px;}
.steps li::before{
  content:"";position:absolute;left:6px;top:22px;bottom:0;width:1px;background:var(--line);
}
.steps li:last-child{padding-bottom:0;}
.steps li:last-child::before{display:none;}
.steps li::after{
  content:"";position:absolute;left:0;top:8px;width:13px;height:13px;border-radius:50%;
  background:var(--brand);border:3px solid rgba(107,78,255,.22);box-sizing:content-box;
}
.steps h4{font-size:16px;font-weight:600;margin-bottom:6px;}
.steps p{font-size:14px;color:var(--text-2);}

/* ---------- 数据与口碑 ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-bottom:48px;}
@media (max-width:767px){.stats{grid-template-columns:repeat(2,1fr);gap:20px;}}
.stat{background:var(--bg-2);border:1px solid var(--line);border-radius:var(--r-md);padding:22px;}
.stat b{display:block;font-family:var(--font-num);font-size:28px;font-weight:700;color:var(--accent);font-variant-numeric:tabular-nums;line-height:1.2;}
.stat span{display:block;font-size:13px;color:var(--text-2);margin-top:6px;}
.voice-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:start;}
@media (max-width:991px){.voice-grid{grid-template-columns:repeat(2,1fr);}}
@media (max-width:575px){.voice-grid{grid-template-columns:1fr;}}
.voice{padding:22px;}
.voice-top{display:flex;align-items:center;gap:12px;margin-bottom:12px;}
.avatar{
  width:40px;height:40px;border-radius:50%;background:var(--bg-0);border:1px solid var(--line-strong);
  display:flex;align-items:center;justify-content:center;font-size:15px;font-weight:600;color:var(--accent);flex:0 0 40px;
}
.voice-top b{font-size:14px;font-weight:600;display:block;}
.voice-top em{font-style:normal;font-size:12px;color:var(--text-3);}
.star-row{display:flex;gap:3px;color:var(--star);margin-bottom:10px;}
.voice p{font-size:14px;color:var(--text-2);}

/* ---------- 资讯列表 ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
@media (max-width:991px){.news-grid{grid-template-columns:repeat(2,1fr);gap:20px;}}
@media (max-width:575px){.news-grid{grid-template-columns:1fr;gap:16px;}}
.news-card{
  background:var(--bg-2);border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;
  box-shadow:var(--sh-1);height:100%;display:flex;flex-direction:column;
  transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;
}
.news-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:var(--line-strong);}
.news-cover{position:relative;display:block;background:var(--bg-1);}
.news-cover img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.news-cat{
  position:absolute;left:12px;top:12px;height:24px;padding:0 10px;border-radius:var(--r-pill);
  background:rgba(107,78,255,.55);border:1px solid rgba(33,212,194,.35);color:#EAFBF8;
  font-size:12px;display:inline-flex;align-items:center;
}
.news-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1;}
.news-body h3{font-size:17px;font-weight:600;line-height:1.5;}
.news-body h3 a{color:var(--text);}
.news-body h3 a:hover{color:var(--accent);}
.clamp-2{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-body p{font-size:14px;color:var(--text-2);}
.news-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;padding-top:12px;border-top:1px solid var(--line);}
.news-foot time{font-size:13px;color:var(--text-3);font-family:var(--font-num);font-variant-numeric:tabular-nums;}
.news-foot a{font-size:13px;font-weight:600;}
.empty-box{
  border:1px dashed var(--line-strong);border-radius:var(--r-lg);padding:48px 24px;text-align:center;
  display:flex;flex-direction:column;align-items:center;gap:16px;color:var(--text-2);font-size:14px;
}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:840px;}
.accordion-item{background:var(--bg-1);border:0;border-radius:var(--r-md)!important;margin-bottom:8px;overflow:hidden;}
.accordion-button{
  background:var(--bg-1);color:var(--text);font-size:16px;font-weight:600;padding:20px 52px 20px 22px;
  border-radius:var(--r-md)!important;box-shadow:none;position:relative;
}
.accordion-button::after{display:none;}
.accordion-button .faq-icon{
  position:absolute;right:22px;top:50%;transform:translateY(-50%);width:16px;height:16px;color:var(--accent);
  transition:transform .18s ease-out;
}
.accordion-button::before{
  content:"";position:absolute;left:0;top:12px;bottom:12px;width:3px;background:var(--brand);
  border-radius:0 3px 3px 0;transform:scaleY(0);transform-origin:center;transition:transform .18s ease-out;
}
.accordion-button:not(.collapsed){background:var(--bg-2);color:var(--text);}
.accordion-button:not(.collapsed)::before{transform:scaleY(1);}
.accordion-button:not(.collapsed) .faq-icon{transform:translateY(-50%) rotate(180deg);}
.accordion-button:focus{box-shadow:none;outline:2px solid var(--accent);outline-offset:-2px;}
.accordion-body{padding:6px 22px 22px 22px;font-size:15px;line-height:1.8;color:var(--text-2);background:var(--bg-2);}

/* ---------- 尾部 CTA ---------- */
.cta-band{background:var(--bg-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:88px 0;text-align:center;position:relative;overflow:hidden;}
@media (max-width:991px){.cta-band{padding:64px 0;}}
.cta-band h2{font-size:clamp(22px,3vw,30px);font-weight:700;margin-bottom:14px;}
.cta-band p{font-size:15px;color:var(--text-2);max-width:620px;margin:0 auto 28px;}
.cta-band .btn{position:relative;z-index:2;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--bg-0);padding:64px 0 0;position:relative;}
.footer-wave{display:block;width:100%;height:auto;opacity:.14;max-height:70px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:40px;padding:40px 0 44px;}
@media (max-width:767px){.footer-grid{grid-template-columns:1fr;gap:32px;}}
.footer-brand p{font-size:14px;color:var(--text-2);max-width:340px;margin-top:16px;}
.footer-title{font-size:14px;font-weight:600;color:var(--text);margin-bottom:16px;}
.footer-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:11px;}
.footer-list a{font-size:14px;color:var(--text-2);}
.footer-list a:hover{color:var(--accent);}
.footer-bottom{
  border-top:1px solid var(--line);padding:20px 0;display:flex;flex-wrap:wrap;gap:12px;
  align-items:center;justify-content:space-between;font-size:13px;color:var(--text-3);
}
.footer-bottom .to-top{display:inline-flex;align-items:center;gap:6px;color:var(--text-2);font-size:13px;}
.footer-bottom .to-top:hover{color:var(--accent);}

/* ---------- 底部固定转化条 ---------- */
.dock-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:1045;height:64px;
  background:rgba(21,16,43,.96);border-top:1px solid var(--line);
  display:flex;align-items:center;
}
.dock-inner{display:flex;align-items:center;justify-content:space-between;gap:18px;width:100%;}
.dock-text{font-size:14px;color:var(--text-2);}
.dock-actions{display:flex;align-items:center;gap:18px;}
.dock-actions .btn-brand{height:40px;padding:0 20px;font-size:14.5px;}
@media (max-width:767px){
  body{padding-bottom:72px;}
  .dock-bar{height:72px;padding-bottom:env(safe-area-inset-bottom);}
  .dock-text{display:none;}
  .dock-actions{width:100%;justify-content:space-between;}
  .dock-actions .btn-brand{width:60%;}
}

/* roulang page: article */
:root{
  --bg-0:#0D0A18;
  --bg-1:#15102B;
  --bg-2:#1E1840;
  --line:rgba(148,132,255,0.18);
  --line-strong:rgba(148,132,255,0.38);
  --brand:#6B4EFF;
  --brand-hover:#5A3DEB;
  --brand-active:#4C32D6;
  --accent:#21D4C2;
  --star:#FFC24B;
  --text:#E8E6F5;
  --text-2:#A9A4C7;
  --text-3:#7A749B;
  --ok:#35D07F;
  --warn:#FF7A59;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:16px;
  --r-pill:999px;
  --sh-1:0 2px 8px rgba(6,4,18,.35);
  --sh-2:0 12px 32px rgba(6,4,18,.45);
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",system-ui,sans-serif;
  --font-num:"Inter","SF Pro Display",system-ui,sans-serif;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--text);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.8;
  padding-bottom:84px;
  background-image:
    radial-gradient(circle at 12% 8%, rgba(107,78,255,.16), transparent 42%),
    radial-gradient(circle at 88% 4%, rgba(33,212,194,.10), transparent 38%);
  background-repeat:no-repeat;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--accent);text-decoration:none}
a:hover{color:var(--text)}
button{font-family:inherit}
h1,h2,h3,h4{margin:0;letter-spacing:.02em}
p{margin:0 0 1.2em}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
::selection{background:rgba(107,78,255,.45);color:#fff}
.container{width:100%;max-width:1200px;padding-left:16px;padding-right:16px;margin:0 auto}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  min-height:72px;display:flex;align-items:center;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background .22s ease-out,border-color .22s ease-out;
}
.site-header.is-scrolled{background:rgba(13,10,24,.95);border-bottom-color:var(--line)}
.nav-shell{display:flex;align-items:center;gap:20px;width:100%}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;flex:0 0 auto;max-width:168px}
.brand-mark{width:26px;height:26px;flex:0 0 26px}
.brand-text b{display:block;font-size:15px;font-weight:700;color:var(--text);line-height:1.15}
.brand-text span{display:block;font-size:11px;color:var(--text-2);letter-spacing:.06em;line-height:1.3}
.nav-links{display:flex;align-items:center;gap:4px;margin:0 auto}
.nav-links a{
  display:inline-block;position:relative;padding:8px 12px;
  font-size:14px;font-weight:500;color:var(--text-2);text-decoration:none;
  border-radius:var(--r-sm);transition:color .18s ease-out;
}
.nav-links a::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:var(--accent);transform:scaleX(0);transform-origin:left;
  transition:transform .2s ease-out;
}
.nav-links a:hover,.nav-links a.active{color:var(--text)}
.nav-links a:hover::after,.nav-links a.active::after{transform:scaleX(1)}
.nav-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.nav-burger{
  display:none;align-items:center;justify-content:center;
  width:42px;height:42px;border-radius:var(--r-sm);
  background:transparent;border:1px solid var(--line-strong);color:var(--text);
  margin-left:auto;cursor:pointer;transition:border-color .18s ease-out,color .18s ease-out;
}
.nav-burger:hover{border-color:var(--accent);color:var(--accent)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:10px;border:1px solid transparent;
  font-size:15px;font-weight:600;line-height:1;cursor:pointer;
  text-decoration:none;white-space:nowrap;
  transition:background .18s ease-out,border-color .18s ease-out,color .18s ease-out,transform .18s ease-out,box-shadow .18s ease-out;
}
.btn-brand{background:var(--brand);color:#fff}
.btn-brand:hover{background:var(--brand-hover);color:#fff;transform:translateY(-2px);box-shadow:var(--sh-2)}
.btn-brand:active{background:var(--brand-active);transform:translateY(0)}
.btn-ghost{background:transparent;border-color:var(--line-strong);color:var(--text)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(0)}
.btn-lg{height:48px;padding:0 28px}
.btn-link{
  display:inline-flex;align-items:center;gap:6px;background:none;border:0;
  padding:0;color:var(--accent);font-size:14px;font-weight:600;cursor:pointer;
}
.btn-link svg{transition:transform .18s ease-out}
.btn-link:hover svg{transform:translateX(3px)}

/* ---------- drawer ---------- */
.nav-drawer{background:var(--bg-1);color:var(--text);border-left:1px solid var(--line);width:320px}
.nav-drawer .offcanvas-header{border-bottom:1px solid var(--line);padding:16px 20px}
.nav-drawer .drawer-title{font-size:15px;font-weight:700}
.drawer-cta{display:grid;gap:10px;padding:18px 20px;border-bottom:1px solid var(--line)}
.drawer-cta .btn{width:100%}
.drawer-links{display:block}
.drawer-links a{
  display:flex;align-items:center;justify-content:space-between;
  height:52px;padding:0 20px;font-size:15px;color:var(--text-2);
  border-bottom:1px solid var(--line);text-decoration:none;
  transition:color .18s ease-out,background .18s ease-out;
}
.drawer-links a:hover,.drawer-links a.active{color:var(--text);background:rgba(107,78,255,.10)}
.drawer-foot{padding:18px 20px;font-size:13px;color:var(--text-3);line-height:1.7}

/* ---------- progress ---------- */
.read-progress{
  position:fixed;top:0;left:0;height:2px;width:0;
  background:var(--accent);z-index:1040;transition:width .1s linear;
}

/* ---------- article head ---------- */
.article-hero{padding:40px 0 8px}
.breadcrumb-line{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--text-2);margin-bottom:18px;
}
.breadcrumb-line a{color:var(--text-2);text-decoration:none}
.breadcrumb-line a:hover{color:var(--accent)}
.breadcrumb-line .sep{color:var(--text-3)}
.breadcrumb-line .current{color:var(--text-2);max-width:280px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.article-title{font-size:clamp(24px,3vw,36px);font-weight:700;line-height:1.3;max-width:900px}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  margin-top:18px;font-size:13px;color:var(--text-3);
  font-family:var(--font-num);
}
.article-meta .dot{color:var(--text-3)}
.meta-chip{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:var(--r-pill);
  background:rgba(107,78,255,.12);color:var(--accent);
  font-size:12px;font-weight:600;font-family:var(--font-cn);
}
.article-cover{margin:30px 0 0;border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line)}
.article-cover img{width:100%;aspect-ratio:16/9;object-fit:cover}

/* ---------- layout ---------- */
.article-section{padding:44px 0 0}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:40px;align-items:start}
.article-main{min-width:0;max-width:760px}

.article-body{font-size:16.5px;line-height:1.9;color:var(--text);word-wrap:break-word}
.article-body p{margin:0 0 1.2em}
.article-body h2{
  font-size:22px;font-weight:700;line-height:1.4;
  margin:2em 0 .8em;padding-left:12px;border-left:3px solid var(--brand);
  scroll-margin-top:110px;
}
.article-body h3{font-size:18px;font-weight:600;margin:1.6em 0 .6em;scroll-margin-top:110px}
.article-body h4{font-size:17px;font-weight:600;margin:1.4em 0 .5em}
.article-body blockquote{
  margin:1.4em 0;padding:20px;background:var(--bg-1);
  border-left:4px solid var(--accent);border-radius:var(--r-md);color:var(--text-2);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{margin:1.6em auto;border-radius:var(--r-md)}
.article-body figure{margin:1.6em 0}
.article-body figcaption{font-size:13px;color:var(--text-2);text-align:center;margin-top:10px}
.article-body ul,.article-body ol{padding-left:22px;margin:0 0 1.2em}
.article-body ul li{list-style:disc;margin-bottom:8px}
.article-body ol li{list-style:decimal;margin-bottom:8px}
.article-body a{color:var(--accent);text-decoration:underline;text-underline-offset:3px}
.article-body table{
  width:100%;border-collapse:collapse;margin:1.4em 0;
  display:block;overflow-x:auto;border-radius:var(--r-md);
}
.article-body th{background:#F7F6FD;color:#1A1630;padding:11px 14px;text-align:left;font-size:14px;font-weight:700;white-space:nowrap}
.article-body td{padding:11px 14px;border-bottom:1px solid var(--line);font-size:14.5px;color:var(--text-2);white-space:nowrap}
.article-body strong{color:#fff}
.article-empty{
  border:1px dashed var(--line-strong);border-radius:var(--r-lg);
  padding:48px 24px;text-align:center;color:var(--text-2);
}
.article-empty p{font-size:16px;margin-bottom:18px}

/* ---------- sidebar ---------- */
.article-side{position:sticky;top:100px;display:grid;gap:20px}
.side-card{
  background:var(--bg-2);border:1px solid var(--line);border-radius:var(--r-md);
  padding:20px;box-shadow:var(--sh-1);
}
.side-card-title{font-size:15px;font-weight:700;margin-bottom:14px;display:flex;align-items:center;gap:8px}
.side-card-title::before{content:"";width:3px;height:14px;background:var(--brand);border-radius:2px}
.toc-list{display:grid;gap:2px}
.toc-list a{
  display:block;padding:8px 10px;border-left:2px solid transparent;
  font-size:13.5px;color:var(--text-2);text-decoration:none;border-radius:0 var(--r-sm) var(--r-sm) 0;
  transition:color .18s ease-out,background .18s ease-out,border-color .18s ease-out;
}
.toc-list a:hover{color:var(--text);background:rgba(107,78,255,.10)}
.toc-list a.current{color:var(--text);border-left-color:var(--brand);background:rgba(107,78,255,.14)}
.rank-list{display:grid;gap:12px}
.rank-list a{
  display:grid;grid-template-columns:22px 1fr;gap:10px;align-items:start;
  font-size:13.5px;color:var(--text-2);text-decoration:none;line-height:1.6;
  transition:color .18s ease-out;
}
.rank-list a:hover{color:var(--accent)}
.rank-list .num{font-family:var(--font-num);font-size:13px;color:var(--text-3);font-variant-numeric:tabular-nums;padding-top:1px}
.rank-list a:nth-child(1) .num,.rank-list a:nth-child(2) .num,.rank-list a:nth-child(3) .num{color:var(--accent)}
.side-cta{background:var(--bg-2);border:1px solid var(--line-strong);border-radius:var(--r-md);padding:20px;box-shadow:var(--sh-1)}
.side-cta h3{font-size:16px;font-weight:700;margin-bottom:8px}
.side-cta p{font-size:13.5px;color:var(--text-2);line-height:1.7;margin-bottom:16px}
.side-cta .btn{width:100%}

/* ---------- tags / nav cards ---------- */
.block-gap{margin-top:64px}
.block-title{font-size:20px;font-weight:700;display:flex;align-items:center;gap:10px;margin-bottom:18px}
.block-title::before{content:"";width:3px;height:16px;background:var(--brand);border-radius:2px}
.tag-row{display:flex;flex-wrap:wrap;gap:10px}
.tag{
  display:inline-flex;align-items:center;height:30px;padding:0 14px;border-radius:var(--r-pill);
  background:rgba(107,78,255,.12);border:1px solid var(--line);
  color:var(--accent);font-size:12.5px;font-weight:500;text-decoration:none;
  transition:border-color .18s ease-out,background .18s ease-out;
}
.tag:hover{border-color:var(--accent);background:rgba(33,212,194,.12);color:var(--accent)}
.pager-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.pager-card{
  display:block;background:var(--bg-2);border:1px solid var(--line);border-radius:var(--r-md);
  padding:20px;text-decoration:none;box-shadow:var(--sh-1);
  transition:transform .18s ease-out,border-color .18s ease-out,box-shadow .18s ease-out;
}
.pager-card:hover{transform:translateY(-2px);border-color:var(--line-strong);box-shadow:var(--sh-2)}
.pager-card span{display:block;font-size:12.5px;color:var(--text-3);margin-bottom:8px}
.pager-card b{display:block;font-size:15px;font-weight:600;color:var(--text);line-height:1.6}
.pager-card:hover b{color:var(--accent)}

/* ---------- related cards ---------- */
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.post-card{
  display:flex;flex-direction:column;background:var(--bg-2);border:1px solid var(--line);
  border-radius:var(--r-md);overflow:hidden;box-shadow:var(--sh-1);
  transition:transform .18s ease-out,border-color .18s ease-out,box-shadow .18s ease-out;
}
.post-card:hover{transform:translateY(-2px);border-color:var(--line-strong);box-shadow:var(--sh-2)}
.post-thumb{position:relative;overflow:hidden}
.post-thumb img{width:100%;aspect-ratio:16/9;object-fit:cover}
.post-thumb .chip{
  position:absolute;top:12px;left:12px;display:inline-flex;align-items:center;height:24px;
  padding:0 10px;border-radius:var(--r-pill);background:rgba(107,78,255,.85);
  color:#fff;font-size:12px;font-weight:600;
}
.post-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1}
.post-body h3{font-size:16.5px;font-weight:600;line-height:1.55;color:var(--text)}
.post-body p{font-size:14px;color:var(--text-2);line-height:1.7;margin:0}
.post-foot{display:flex;align-items:center;justify-content:space-between;margin-top:auto;padding-top:6px}
.post-foot time{font-size:13px;color:var(--text-3);font-family:var(--font-num);font-variant-numeric:tabular-nums}
.post-foot a{font-size:13.5px;font-weight:600;color:var(--accent);display:inline-flex;align-items:center;gap:5px}
.post-foot a:hover{color:var(--text)}
.center-btn{display:flex;justify-content:center;margin-top:36px}

/* ---------- fixed bar ---------- */
.convert-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:1035;
  min-height:64px;background:rgba(21,16,43,.96);border-top:1px solid var(--line);
  display:flex;align-items:center;
}
.convert-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;width:100%;padding:10px 0}
.convert-text{font-size:14px;color:var(--text-2)}
.convert-actions{display:flex;align-items:center;gap:16px}

/* ---------- footer ---------- */
.site-footer{margin-top:96px;background:var(--bg-1);border-top:1px solid var(--line);padding:0 0 26px}
.footer-wave{display:block;width:100%;height:70px;opacity:.14}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:40px;padding:26px 0 34px}
.footer-brand p{font-size:14px;color:var(--text-2);line-height:1.8;margin:14px 0 0;max-width:340px}
.footer-title{font-size:14px;font-weight:700;color:var(--text);margin-bottom:14px}
.footer-list{display:grid;gap:10px}
.footer-list a{font-size:14px;color:var(--text-2);text-decoration:none;transition:color .18s ease-out}
.footer-list a:hover{color:var(--accent)}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;
  border-top:1px solid var(--line);padding-top:20px;font-size:13px;color:var(--text-3);
}
.to-top{display:inline-flex;align-items:center;gap:6px;color:var(--text-2);text-decoration:none;font-size:13px}
.to-top:hover{color:var(--accent)}

@media (max-width:1199.98px){
  .container{max-width:960px}
}
@media (max-width:991.98px){
  .nav-links,.nav-actions{display:none}
  .nav-burger{display:inline-flex}
  .container{max-width:720px}
  .article-layout{grid-template-columns:minmax(0,1fr);gap:32px}
  .article-side{position:static;order:2}
  .article-main{max-width:none}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .site-footer{margin-top:72px}
}
@media (max-width:767.98px){
  .container{max-width:540px}
  .article-hero{padding:28px 0 4px}
  .article-meta{gap:8px}
  .breadcrumb-line .current{max-width:180px}
  .card-grid{grid-template-columns:minmax(0,1fr)}
  .pager-grid{grid-template-columns:minmax(0,1fr)}
  .footer-grid{grid-template-columns:1fr}
  .convert-inner{flex-direction:column;align-items:stretch;gap:10px}
  .convert-text{font-size:13px}
  .convert-actions{justify-content:space-between}
  .convert-actions .btn{flex:0 0 60%}
  body{padding-bottom:104px}
  .convert-bar{min-height:72px;padding-bottom:env(safe-area-inset-bottom)}
}
@media (max-width:575.98px){
  .container{max-width:none}
  .article-body{font-size:16px;line-height:1.85}
  .side-card,.side-cta{padding:18px}
  .post-body{padding:18px}
  .block-gap{margin-top:56px}
}

/* roulang page: category1 */
:root{
  --bg-0:#0D0A18;
  --bg-1:#15102B;
  --bg-2:#1E1840;
  --line:rgba(148,132,255,.18);
  --line-strong:rgba(148,132,255,.38);
  --brand:#6B4EFF;
  --brand-hover:#5A3DEB;
  --brand-active:#4C32D6;
  --accent:#21D4C2;
  --star:#FFC24B;
  --text:#E8E6F5;
  --text-2:#A9A4C7;
  --text-3:#7A749B;
  --ok:#35D07F;
  --warn:#FF7A59;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:16px;
  --r-pill:999px;
  --sh-1:0 2px 8px rgba(6,4,18,.35);
  --sh-2:0 12px 32px rgba(6,4,18,.45);
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",system-ui,sans-serif;
  --font-num:"Inter","SF Pro Display",system-ui,sans-serif;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--text);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  padding-bottom:88px;
}
img{max-width:100%;display:block;}
a{color:var(--accent);text-decoration:none;transition:color .18s ease-out,opacity .18s ease-out;}
a:hover{color:#4de5d4;}
h1,h2,h3,h4,h5{margin:0;color:var(--text);font-weight:700;}
p{margin:0 0 1.2em;}
p:last-child{margin-bottom:0;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px;}

.container{max-width:1200px!important;padding-left:16px;padding-right:16px;}
.num{font-family:var(--font-num);font-variant-numeric:tabular-nums;}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background .22s ease-out,border-color .22s ease-out;
}
.site-header.scrolled{
  background:rgba(13,10,24,.95);
  border-bottom:1px solid var(--line);
}
.nav-shell{display:flex;align-items:center;height:72px;gap:20px;}
.brand{display:flex;align-items:center;gap:9px;text-decoration:none;max-width:168px;flex:none;}
.brand-mark{width:26px;height:26px;flex:none;}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-text b{font-size:16px;font-weight:700;letter-spacing:.02em;color:var(--text);}
.brand-text span{font-size:10px;letter-spacing:.12em;color:var(--text-2);white-space:nowrap;}
.nav-links{display:flex;align-items:center;gap:26px;margin:0 auto;}
.nav-links a{
  position:relative;display:inline-block;padding:6px 0;
  color:var(--text-2);font-size:14px;font-weight:500;
}
.nav-links a::after{
  content:"";position:absolute;left:0;bottom:0;width:0;height:2px;
  background:var(--accent);transition:width .2s ease-out;
}
.nav-links a:hover,.nav-links a.active{color:var(--text);}
.nav-links a:hover::after,.nav-links a.active::after{width:100%;}
.nav-actions{display:flex;align-items:center;gap:12px;flex:none;}
.nav-burger{
  display:none;margin-left:auto;
  width:44px;height:44px;border-radius:10px;
  background:var(--bg-2);border:1px solid var(--line);color:var(--text);
  align-items:center;justify-content:center;cursor:pointer;
  transition:border-color .18s ease-out,background .18s ease-out;
}
.nav-burger:hover{border-color:var(--line-strong);background:#241d4d;}

/* ---------- 按钮 ---------- */
.btn-brand,.btn-ghost,.btn-line{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:10px;
  font-size:15px;font-weight:600;line-height:1;
  cursor:pointer;border:1px solid transparent;
  transition:background .18s ease-out,border-color .18s ease-out,transform .18s ease-out,color .18s ease-out;
}
.btn-brand{background:var(--brand);color:#fff;}
.btn-brand:hover{background:var(--brand-hover);color:#fff;transform:translateY(-2px);}
.btn-brand:active{background:var(--brand-active);transform:translateY(0);}
.btn-ghost{background:transparent;border-color:var(--line-strong);color:var(--text);}
.btn-ghost:hover{border-color:var(--accent);color:var(--text);transform:translateY(-2px);}
.btn-line{background:transparent;border-color:var(--line-strong);color:var(--text);}
.btn-line:hover{border-color:var(--accent);transform:translateY(-2px);}
.btn-brand.lg,.btn-ghost.lg{height:48px;padding:0 28px;}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--accent);font-size:14px;font-weight:600;
}
.link-arrow svg{transition:transform .18s ease-out;}
.link-arrow:hover svg{transform:translateX(3px);}

/* ---------- 抽屉 ---------- */
.offcanvas.drawer{background:var(--bg-1);color:var(--text);width:320px;border-right:1px solid var(--line);}
.drawer-top{display:flex;flex-direction:column;gap:10px;padding:20px 20px 18px;}
.drawer-top .btn-brand,.drawer-top .btn-ghost{width:100%;}
.drawer-list{margin:0;padding:0;list-style:none;}
.drawer-list li{border-top:1px solid var(--line);}
.drawer-list a{
  display:flex;align-items:center;height:52px;padding:0 20px;
  color:var(--text-2);font-size:15px;
}
.drawer-list a.active,.drawer-list a:hover{color:var(--text);background:var(--bg-2);}
.drawer-foot{padding:18px 20px;border-top:1px solid var(--line);font-size:13px;color:var(--text-3);margin-top:auto;}

/* ---------- 分类页 Hero ---------- */
.cat-hero{
  position:relative;
  min-height:320px;
  display:flex;align-items:center;
  background-image:linear-gradient(rgba(13,10,24,.72),rgba(13,10,24,.86)),url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
  border-bottom:1px solid var(--line);
}
.cat-hero::before{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(232,230,245,.16) 1px,transparent 1px);
  background-size:26px 26px;opacity:.5;pointer-events:none;
}
.cat-hero .container{position:relative;z-index:1;padding-top:56px;padding-bottom:56px;}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-2);margin-bottom:14px;}
.crumb a{color:var(--text-2);}
.crumb a:hover{color:var(--accent);}
.crumb .sep{color:var(--text-3);}
.cat-hero h1{font-size:clamp(28px,4.6vw,44px);line-height:1.25;letter-spacing:.02em;margin-bottom:14px;}
.cat-hero h1 em{font-style:normal;color:var(--accent);}
.cat-hero .lead{font-size:16px;color:var(--text-2);max-width:620px;margin:0;}
.hero-badges{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px;}
.pill{
  display:inline-flex;align-items:center;gap:6px;height:24px;padding:0 12px;
  border-radius:var(--r-pill);font-size:12px;line-height:1;
  background:rgba(107,78,255,.12);color:var(--accent);border:1px solid var(--line);
}
.pill.gold{color:var(--star);}
.pill.gold svg{width:10px;height:10px;}

/* ---------- 主体 ---------- */
.section{padding:96px 0;}
.section.tight{padding-top:72px;}
.section.alt{background:var(--bg-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{margin-bottom:32px;}
.section-head h2{font-size:clamp(22px,3vw,32px);line-height:1.3;margin-bottom:8px;}
.section-head p{font-size:14px;color:var(--text-2);margin:0;max-width:640px;}

.cat-layout{display:grid;grid-template-columns:minmax(0,4fr) minmax(0,8fr);gap:32px;align-items:start;}
.toc-card{
  position:sticky;top:96px;
  background:var(--bg-2);border:1px solid var(--line);border-radius:var(--r-md);
  padding:22px;box-shadow:var(--sh-1);
}
.toc-card .toc-title{font-size:13px;letter-spacing:.08em;color:var(--text-3);margin-bottom:14px;font-family:var(--font-num);}
.toc-list a{
  display:block;padding:9px 12px;border-radius:var(--r-sm);
  color:var(--text-2);font-size:14px;line-height:1.5;
  border-left:3px solid transparent;transition:background .18s ease-out,color .18s ease-out,border-color .18s ease-out;
}
.toc-list a:hover{background:rgba(107,78,255,.1);color:var(--text);}
.toc-list a.active{background:rgba(107,78,255,.14);color:var(--text);border-left-color:var(--brand);font-weight:600;}
.toc-help{margin-top:18px;padding-top:16px;border-top:1px solid var(--line);font-size:13px;color:var(--text-3);line-height:1.7;}

.content-block{margin-bottom:44px;}
.content-block:last-child{margin-bottom:0;}
.content-block h2{
  font-size:clamp(20px,2.4vw,26px);line-height:1.35;margin-bottom:16px;
  padding-left:12px;border-left:3px solid var(--brand);
}
.content-block h3{font-size:18px;font-weight:600;margin:22px 0 10px;}
.content-block p{color:var(--text-2);font-size:15.5px;}
.content-block p strong{color:var(--text);font-weight:600;}

/* 要点卡组：2 列 + 1 通栏 */
.point-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;}
.point-card{
  background:var(--bg-2);border:1px solid var(--line);border-radius:var(--r-md);
  padding:24px;box-shadow:var(--sh-1);
  transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;
}
.point-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:var(--line-strong);}
.point-card .idx{font-family:var(--font-num);font-size:13px;letter-spacing:.08em;color:var(--accent);display:block;margin-bottom:12px;}
.point-card h3{font-size:18px;font-weight:600;margin:0 0 10px;}
.point-card p{font-size:14px;color:var(--text-2);margin-bottom:10px;}
.point-card .thumb{border-radius:var(--r-sm);overflow:hidden;margin-top:14px;border:1px solid var(--line);}
.point-card .thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.point-card.wide{grid-column:1 / -1;display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:24px;align-items:center;}
.point-card.wide .thumb{margin-top:0;}
.point-card.wide .thumb img{aspect-ratio:4/3;}
.mini-list{margin-top:8px;}
.mini-list li{
  position:relative;padding-left:18px;font-size:14px;color:var(--text-2);margin-bottom:8px;
}
.mini-list li::before{
  content:"";position:absolute;left:0;top:11px;width:6px;height:6px;border-radius:50%;
  background:var(--brand);
}

/* 条目列表 */
.entry-list{border-top:1px solid var(--line);margin-top:8px;}
.entry{
  display:grid;grid-template-columns:40px minmax(0,1fr);gap:16px;
  padding:18px 0;border-bottom:1px solid var(--line);
  transition:background .18s ease-out;
}
.entry:hover{background:rgba(107,78,255,.06);}
.entry .no{font-family:var(--font-num);font-size:14px;color:var(--text-3);padding-top:2px;}
.entry h3{font-size:16px;font-weight:600;margin-bottom:6px;}
.entry p{font-size:14px;color:var(--text-2);margin:0 0 8px;}
.entry .entry-link{font-size:13px;font-weight:600;}

/* 提示条 */
.notice{
  display:flex;gap:14px;align-items:flex-start;
  background:var(--bg-2);border:1px solid var(--line);border-left:3px solid var(--star);
  border-radius:var(--r-md);padding:20px 22px;
}
.notice svg{flex:none;margin-top:3px;}
.notice p{font-size:14.5px;color:var(--text-2);margin:0;}
.notice strong{color:var(--text);}

/* FAQ */
.faq-wrap{max-width:900px;}
.accordion-item{
  background:var(--bg-1);border:none;border-radius:var(--r-md);
  margin-bottom:8px;overflow:hidden;
}
.accordion-button{
  background:var(--bg-1);color:var(--text);
  font-size:16px;font-weight:600;line-height:1.6;
  padding:18px 20px;box-shadow:none;border-radius:var(--r-md)!important;
  display:flex;align-items:center;gap:14px;
}
.accordion-button:not(.collapsed){
  background:var(--bg-1);color:var(--text);
  box-shadow:inset 3px 0 0 var(--brand);
}
.accordion-button:focus{box-shadow:none;}
.accordion-button::after{display:none;}
.faq-icon{position:relative;flex:none;width:16px;height:16px;margin-left:auto;}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--accent);border-radius:2px;
  transition:transform .18s ease-out,opacity .18s ease-out;
}
.faq-icon::before{top:7px;left:0;width:16px;height:2px;}
.faq-icon::after{top:0;left:7px;width:2px;height:16px;}
.accordion-button:not(.collapsed) .faq-icon::after{transform:rotate(90deg);opacity:0;}
.accordion-body{
  padding:0 22px 20px;font-size:15px;line-height:1.8;color:var(--text-2);
  border-top:1px solid var(--line);padding-top:16px;
}

/* 尾部 CTA */
.cta-band{
  background:var(--bg-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  padding:72px 0;text-align:center;
}
.cta-band h2{font-size:clamp(22px,3vw,30px);margin-bottom:12px;}
.cta-band p{color:var(--text-2);font-size:15px;max-width:560px;margin:0 auto 24px;}
.cta-band .cta-row{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;}

/* 页脚 */
.site-footer{background:var(--bg-0);border-top:1px solid var(--line);padding-top:56px;position:relative;}
.footer-wave{width:100%;height:70px;opacity:.14;display:block;margin-bottom:24px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:40px;}
.footer-brand p{font-size:14px;color:var(--text-2);margin-top:16px;max-width:330px;}
.site-footer .brand{margin-bottom:4px;}
.footer-title{font-size:13px;letter-spacing:.08em;color:var(--text-3);margin-bottom:14px;font-family:var(--font-num);}
.footer-list li{margin-bottom:10px;}
.footer-list a{color:var(--text-2);font-size:14px;}
.footer-list a:hover{color:var(--accent);}
.footer-bottom{
  margin-top:44px;border-top:1px solid var(--line);
  padding:20px 0 26px;display:flex;flex-wrap:wrap;gap:12px 24px;
  align-items:center;justify-content:space-between;
  font-size:13px;color:var(--text-3);
}
.to-top{display:inline-flex;align-items:center;gap:6px;color:var(--text-2);font-size:13px;background:var(--bg-2);border:1px solid var(--line);border-radius:var(--r-pill);padding:7px 14px;}
.to-top:hover{border-color:var(--line-strong);color:var(--text);}

/* 底部固定转化条 */
.sticky-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:1040;
  height:64px;
  background:rgba(21,16,43,.96);
  border-top:1px solid var(--line);
  backdrop-filter:blur(2px);
}
.sticky-bar .inner{
  height:100%;display:flex;align-items:center;gap:16px;
  justify-content:space-between;
  padding-bottom:env(safe-area-inset-bottom);
}
.sticky-bar .tip{font-size:14px;color:var(--text-2);}
.sticky-bar .acts{display:flex;align-items:center;gap:14px;}

/* 响应式 */
@media (max-width:1199.98px){
  .cat-layout{grid-template-columns:minmax(0,4fr) minmax(0,8fr);gap:24px;}
}
@media (max-width:991.98px){
  .nav-links,.nav-actions{display:none;}
  .nav-burger{display:inline-flex;}
  .section{padding:72px 0;}
  .cat-layout{grid-template-columns:1fr;}
  .toc-card{position:static;}
  .toc-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:4px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .footer-brand{grid-column:1 / -1;}
}
@media (max-width:767.98px){
  body{padding-bottom:104px;}
  .section{padding:56px 0;}
  .cat-hero{min-height:auto;}
  .cat-hero .container{padding-top:44px;padding-bottom:44px;}
  .point-grid{grid-template-columns:1fr;gap:16px;}
  .point-card{padding:18px;}
  .point-card.wide{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
  .cta-band{padding:56px 0;}
  .sticky-bar{height:72px;}
  .sticky-bar .tip{display:none;}
  .sticky-bar .inner{justify-content:flex-end;}
  .sticky-bar .acts{width:100%;}
  .sticky-bar .acts .btn-brand{width:60%;}
}
@media (max-width:575.98px){
  .toc-list{grid-template-columns:1fr;}
  .hero-badges{gap:8px;}
  .entry{grid-template-columns:28px minmax(0,1fr);gap:12px;}
  .cta-band .cta-row{flex-direction:column;align-items:stretch;}
  .cta-band .cta-row .btn-brand,.cta-band .cta-row .btn-line{width:100%;}
}

/* roulang page: category2 */
:root{
  --bg-0:#0D0A18;
  --bg-1:#15102B;
  --bg-2:#1E1840;
  --line:rgba(148,132,255,.18);
  --line-strong:rgba(148,132,255,.38);
  --brand:#6B4EFF;
  --brand-hover:#5A3DEB;
  --brand-active:#4C32D6;
  --accent:#21D4C2;
  --star:#FFC24B;
  --text:#E8E6F5;
  --text-2:#A9A4C7;
  --text-3:#7A749B;
  --ok:#35D07F;
  --warn:#FF7A59;
  --invert-bg:#F7F6FD;
  --invert-text:#1A1630;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:16px;
  --r-pill:999px;
  --sh-1:0 2px 8px rgba(6,4,18,.35);
  --sh-2:0 12px 32px rgba(6,4,18,.45);
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",system-ui,sans-serif;
  --font-num:"Inter","SF Pro Display",system-ui,sans-serif;
  --ease:180ms ease-out;
  --bar-h:64px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--text);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.8;
  padding-bottom:calc(var(--bar-h) + 28px);
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  background-image:radial-gradient(circle, rgba(232,230,245,.075) 1px, transparent 1px);
  background-size:44px 44px;
  pointer-events:none;
  z-index:0;
  opacity:.75;
}
body>*{position:relative;z-index:1}
img{max-width:100%;display:block;object-fit:cover}
a{color:var(--accent);text-decoration:none;transition:color var(--ease)}
a:hover{color:#5CF0DE}
p{margin:0 0 1.2em}
p:last-child{margin-bottom:0}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.3;letter-spacing:.01em}
h1{font-size:clamp(28px,4.6vw,44px);line-height:1.25;letter-spacing:.02em}
h2{font-size:clamp(22px,3vw,32px);line-height:1.3}
h3{font-size:20px;font-weight:600}
h4{font-size:17px;font-weight:600}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}

.container{width:100%;padding-left:16px;padding-right:16px;margin-left:auto;margin-right:auto}
@media (min-width:576px){.container{max-width:540px}}
@media (min-width:768px){.container{max-width:720px}}
@media (min-width:992px){.container{max-width:960px}}
@media (min-width:1200px){.container{max-width:1140px}}
@media (min-width:1400px){.container{max-width:1200px}}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:44px;
  padding:0 22px;
  font-size:15px;
  font-weight:600;
  line-height:1;
  border-radius:10px;
  border:1px solid transparent;
  cursor:pointer;
  white-space:nowrap;
  transition:background var(--ease),border-color var(--ease),color var(--ease),transform var(--ease),box-shadow var(--ease);
}
.btn-brand{background:var(--brand);color:#fff;border-color:var(--brand);box-shadow:var(--sh-1)}
.btn-brand:hover{background:var(--brand-hover);border-color:var(--brand-hover);color:#fff;transform:translateY(-2px);box-shadow:var(--sh-2)}
.btn-brand:active{background:var(--brand-active);border-color:var(--brand-active);transform:translateY(0)}
.btn-ghost{background:transparent;color:var(--text);border-color:var(--line-strong)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(0)}
.btn-lg{height:48px;padding:0 28px;font-size:16px}
.btn:disabled,.btn.disabled{opacity:.5;cursor:not-allowed;transform:none;box-shadow:none}
.link-arrow{
  display:inline-flex;
  align-items:center;
  gap:6px;
  color:var(--accent);
  font-size:14px;
  font-weight:600;
}
.link-arrow svg{transition:transform var(--ease);flex:none}
.link-arrow:hover svg{transform:translateX(3px)}
.badge-pill{
  display:inline-flex;
  align-items:center;
  gap:6px;
  height:24px;
  padding:0 10px;
  font-size:12px;
  font-weight:600;
  border-radius:var(--r-pill);
  background:rgba(107,78,255,.12);
  color:var(--accent);
  border:1px solid rgba(33,212,194,.22);
  white-space:nowrap;
}
.badge-star{
  background:rgba(255,194,75,.12);
  color:var(--star);
  border-color:rgba(255,194,75,.28);
}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:1040;
  background:rgba(13,10,24,0);
  border-bottom:1px solid transparent;
  transition:background var(--ease),border-color var(--ease);
}
.site-header.is-scrolled{
  background:rgba(13,10,24,.95);
  border-bottom-color:var(--line);
}
.nav-shell{
  display:flex;
  align-items:center;
  gap:24px;
  height:72px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  max-width:168px;
  color:var(--text);
  flex:none;
}
.brand:hover{color:var(--text)}
.brand-mark{width:28px;height:28px;flex:none}
.brand-text{display:flex;flex-direction:column;line-height:1.1}
.brand-text b{font-size:16px;font-weight:700;letter-spacing:.04em}
.brand-text span{font-size:10px;color:var(--text-2);letter-spacing:.06em;margin-top:2px}
.nav-links{
  display:flex;
  align-items:center;
  gap:28px;
  margin:0 auto 0 8px;
}
.nav-links a{
  position:relative;
  font-size:14px;
  font-weight:500;
  color:var(--text-2);
  padding:6px 0;
}
.nav-links a::after{
  content:"";
  position:absolute;
  left:0;
  bottom:0;
  height:2px;
  width:0;
  background:var(--accent);
  border-radius:2px;
  transition:width var(--ease);
}
.nav-links a:hover{color:var(--text)}
.nav-links a:hover::after{width:100%}
.nav-links a.active{color:var(--text)}
.nav-links a.active::after{width:100%}
.nav-actions{display:flex;align-items:center;gap:12px;flex:none}
.nav-burger{
  display:none;
  width:44px;
  height:44px;
  align-items:center;
  justify-content:center;
  border:1px solid var(--line-strong);
  border-radius:10px;
  background:transparent;
  color:var(--text);
  margin-left:auto;
  cursor:pointer;
  transition:border-color var(--ease),color var(--ease);
}
.nav-burger:hover{border-color:var(--accent);color:var(--accent)}

.offcanvas.nav-drawer{
  background:var(--bg-1);
  color:var(--text);
  width:min(84vw,340px);
  border-right:1px solid var(--line);
}
.nav-drawer .offcanvas-header{border-bottom:1px solid var(--line);padding:18px 20px}
.nav-drawer .offcanvas-body{padding:20px;display:flex;flex-direction:column;gap:20px}
.drawer-cta{display:flex;flex-direction:column;gap:12px}
.drawer-cta .btn{width:100%}
.drawer-list{border-top:1px solid var(--line)}
.drawer-list a{
  display:flex;
  align-items:center;
  justify-content:space-between;
  height:52px;
  font-size:15px;
  color:var(--text-2);
  border-bottom:1px solid var(--line);
}
.drawer-list a:hover,.drawer-list a.active{color:var(--text)}
.drawer-foot{
  margin-top:auto;
  padding-top:16px;
  border-top:1px solid var(--line);
  font-size:13px;
  line-height:1.7;
  color:var(--text-3);
}

/* ---------- 底部固定转化条 ---------- */
.bottom-bar{
  position:fixed;
  left:0;
  right:0;
  bottom:0;
  z-index:1030;
  background:rgba(21,16,43,.96);
  border-top:1px solid var(--line);
  min-height:var(--bar-h);
  display:flex;
  align-items:center;
  padding-bottom:env(safe-area-inset-bottom);
}
.bottom-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  width:100%;
}
.bottom-text{font-size:14px;color:var(--text-2)}
.bottom-actions{display:flex;align-items:center;gap:18px;flex:none}
.bottom-actions .btn{height:40px;padding:0 20px;font-size:14px}

/* ---------- 分类 Hero ---------- */
.cat-hero{
  position:relative;
  min-height:280px;
  display:flex;
  align-items:center;
  background-image:linear-gradient(90deg,rgba(13,10,24,.92) 0%,rgba(13,10,24,.78) 55%,rgba(13,10,24,.6) 100%),url('/assets/images/backpic/back-2.png');
  background-size:cover;
  background-position:center;
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.cat-hero::after{
  content:"";
  position:absolute;
  inset:auto 0 0 0;
  height:1px;
  background:linear-gradient(90deg,transparent,var(--line-strong),transparent);
}
.cat-hero .container{position:relative;z-index:2;padding-top:56px;padding-bottom:56px}
.crumb{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--text-2);
  margin-bottom:16px;
  flex-wrap:wrap;
}
.crumb a{color:var(--text-2)}
.crumb a:hover{color:var(--accent)}
.crumb .sep{color:var(--text-3)}
.cat-hero h1{margin-bottom:14px}
.cat-hero p{font-size:15px;color:var(--text-2);margin:0;max-width:640px}

/* ---------- 标签条 ---------- */
.tag-strip{
  border-bottom:1px solid var(--line);
  background:var(--bg-0);
}
.tag-scroll{
  display:flex;
  align-items:center;
  gap:10px;
  overflow-x:auto;
  padding:18px 0;
  scrollbar-width:none;
}
.tag-scroll::-webkit-scrollbar{display:none}
.tag-pill{
  flex:none;
  display:inline-flex;
  align-items:center;
  gap:6px;
  height:34px;
  padding:0 16px;
  font-size:13px;
  font-weight:600;
  border-radius:var(--r-pill);
  border:1px solid var(--line);
  background:var(--bg-2);
  color:var(--text-2);
  cursor:pointer;
  transition:background var(--ease),color var(--ease),border-color var(--ease);
}
.tag-pill:hover{color:var(--text);border-color:var(--line-strong)}
.tag-pill.is-active{background:var(--brand);border-color:var(--brand);color:#fff}

/* ---------- 板块 ---------- */
.section{padding:96px 0}
.section-tight{padding:72px 0}
.section-alt{background:var(--bg-1)}
.sec-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  margin-bottom:36px;
  flex-wrap:wrap;
}
.sec-head p{font-size:14px;color:var(--text-2);margin:8px 0 0}
.eyebrow{
  font-family:var(--font-num);
  font-size:13px;
  font-weight:600;
  letter-spacing:.08em;
  color:var(--accent);
  text-transform:uppercase;
  margin-bottom:10px;
  display:block;
}

/* ---------- 通栏卡片流 ---------- */
.stream{display:flex;flex-direction:column;gap:20px}
.stream-card{
  display:grid;
  grid-template-columns:240px 1fr;
  gap:24px;
  padding:20px;
  background:var(--bg-2);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--sh-1);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.stream-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:var(--line-strong)}
.stream-thumb{
  position:relative;
  width:100%;
  aspect-ratio:4/3;
  border-radius:var(--r-md);
  overflow:hidden;
  background:var(--bg-1);
  border:1px solid var(--line);
}
.stream-thumb img{width:100%;height:100%}
.stream-thumb .badge-pill{position:absolute;left:10px;top:10px;background:rgba(13,10,24,.72)}
.stream-body{display:flex;flex-direction:column;gap:10px;min-width:0}
.stream-top{display:flex;align-items:center;gap:12px}
.stream-num{
  font-family:var(--font-num);
  font-variant-numeric:tabular-nums;
  font-size:13px;
  font-weight:600;
  letter-spacing:.08em;
  color:var(--accent);
}
.stream-body h3{font-size:19px}
.stream-body .desc{font-size:14px;line-height:1.75;color:var(--text-2);margin:0}
.stream-meta{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--text-3);
  font-variant-numeric:tabular-nums;
}
.stream-foot{
  margin-top:auto;
  padding-top:12px;
  border-top:1px solid var(--line);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
}

/* ---------- 亮色反色区块 ---------- */
.invert{
  background:var(--invert-bg);
  color:var(--invert-text);
  border-radius:var(--r-lg);
  padding:48px;
  border:1px solid rgba(26,22,48,.08);
}
.invert h2{color:var(--invert-text)}
.invert .lead{font-size:15px;line-height:1.8;color:#4A4566;margin:12px 0 0;max-width:720px}
.flow-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:20px;
  margin-top:36px;
}
.flow-item{
  background:#fff;
  border:1px solid rgba(26,22,48,.1);
  border-radius:var(--r-md);
  padding:22px 20px;
  display:flex;
  flex-direction:column;
  gap:8px;
}
.flow-item .num{
  font-family:var(--font-num);
  font-variant-numeric:tabular-nums;
  font-size:13px;
  font-weight:700;
  letter-spacing:.1em;
  color:var(--brand);
}
.flow-item h4{color:var(--invert-text)}
.flow-item p{font-size:14px;line-height:1.75;color:#55516E;margin:0}

/* ---------- 混合栅格 ---------- */
.mix-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.mix-card{
  background:var(--bg-2);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:24px;
  box-shadow:var(--sh-1);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.mix-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:var(--line-strong)}
.mix-card h3{margin-bottom:10px}
.mix-card p{font-size:14px;line-height:1.8;color:var(--text-2);margin:0}
.mix-card.wide{grid-column:1 / -1;display:grid;grid-template-columns:1.1fr 1fr;gap:28px;align-items:center;padding:0;overflow:hidden}
.mix-card.wide .wide-text{padding:28px}
.mix-card.wide .wide-media{height:100%;min-height:220px}
.mix-card.wide .wide-media img{width:100%;height:100%}
.check-list{display:flex;flex-direction:column;gap:10px;margin-top:14px}
.check-list li{display:flex;gap:10px;font-size:14px;color:var(--text-2);line-height:1.7}
.check-list li svg{flex:none;margin-top:6px;color:var(--accent)}

/* ---------- FAQ ---------- */
.faq .accordion-item{
  background:var(--bg-1);
  border:0;
  border-radius:var(--r-md);
  margin-bottom:8px;
  overflow:hidden;
}
.faq .accordion-item:last-child{margin-bottom:0}
.faq .accordion-button{
  background:var(--bg-1);
  color:var(--text);
  font-size:16px;
  font-weight:600;
  padding:20px 24px;
  box-shadow:none;
  position:relative;
  gap:16px;
}
.faq .accordion-button:not(.collapsed){background:var(--bg-1);color:var(--text);box-shadow:none}
.faq .accordion-button::before{
  content:"";
  position:absolute;
  left:0;
  top:14px;
  bottom:14px;
  width:3px;
  border-radius:0 3px 3px 0;
  background:var(--brand);
  opacity:0;
  transition:opacity var(--ease);
}
.faq .accordion-button:not(.collapsed)::before{opacity:1}
.faq .accordion-button::after{
  background-image:none;
  content:"+";
  font-size:22px;
  font-weight:400;
  line-height:1;
  width:22px;
  height:22px;
  display:flex;
  align-items:center;
  justify-content:center;
  color:var(--accent);
  transition:transform var(--ease);
  transform:none;
}
.faq .accordion-button:not(.collapsed)::after{transform:rotate(45deg)}
.faq .accordion-button:focus{box-shadow:none;outline:2px solid var(--accent);outline-offset:-2px}
.faq .accordion-body{
  padding:0 24px 22px 24px;
  font-size:15px;
  line-height:1.8;
  color:var(--text-2);
}

/* ---------- 页尾 CTA ---------- */
.cta-band{
  background:var(--bg-1);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  text-align:center;
  padding:88px 0;
}
.cta-band h2{margin-bottom:14px}
.cta-band p{font-size:15px;color:var(--text-2);margin:0 auto 28px;max-width:560px}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--bg-0);padding:0 0 28px;position:relative}
.footer-wave{width:100%;height:70px;opacity:.14;display:block}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr;
  gap:48px;
  padding:32px 0 40px;
  border-bottom:1px solid var(--line);
}
.footer-brand p{font-size:14px;line-height:1.8;color:var(--text-2);margin:16px 0 0;max-width:340px}
.footer-title{font-size:15px;font-weight:600;color:var(--text);margin-bottom:16px}
.footer-list li{margin-bottom:10px}
.footer-list a{font-size:14px;color:var(--text-2)}
.footer-list a:hover{color:var(--accent)}
.footer-bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding-top:22px;
  font-size:13px;
  color:var(--text-3);
  flex-wrap:wrap;
}
.to-top{display:inline-flex;align-items:center;gap:6px;color:var(--text-2);font-size:13px}
.to-top:hover{color:var(--accent)}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .sec-head{margin-bottom:28px}
}
@media (max-width:991px){
  .nav-links,.nav-actions{display:none}
  .nav-burger{display:inline-flex}
  .section{padding:72px 0}
  .flow-grid{grid-template-columns:repeat(2,1fr)}
  .invert{padding:36px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:767px){
  body{padding-bottom:calc(72px + 28px + env(safe-area-inset-bottom));--bar-h:72px}
  .section{padding:56px 0}
  .section-tight{padding:48px 0}
  .cat-hero .container{padding-top:40px;padding-bottom:40px}
  .stream-card{grid-template-columns:1fr;gap:16px;padding:16px}
  .stream-thumb{aspect-ratio:16/9}
  .mix-grid{grid-template-columns:1fr}
  .mix-card{padding:18px}
  .mix-card.wide{grid-template-columns:1fr;padding:0}
  .mix-card.wide .wide-text{padding:20px}
  .mix-card.wide .wide-media{order:-1;min-height:180px}
  .flow-grid{grid-template-columns:1fr;gap:14px}
  .invert{padding:24px}
  .cta-band{padding:56px 0}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding:24px 0 28px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:10px}
  .bottom-text{display:none}
  .bottom-inner{justify-content:flex-end;gap:12px}
  .bottom-actions{width:100%;display:flex;justify-content:space-between;align-items:center}
  .bottom-actions .btn{min-width:56%;height:44px}
  .stream-foot{flex-direction:column;align-items:flex-start;gap:10px}
}
@media (max-width:575px){
  .brand{max-width:150px}
  .brand-text span{font-size:9px}
  .cat-hero{min-height:260px}
  .stream-body h3{font-size:17px}
  .mix-card.wide .wide-media{min-height:160px}
}