/* roulang page: index */
:root{
  --bg-0:#0b0f10;
  --bg-1:#11171a;
  --bg-2:#161e22;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,183,77,.28);
  --primary:#ffb74d;
  --primary-strong:#ff9d1e;
  --accent:#4fd1c5;
  --danger:#ff7a6b;
  --text-1:#f2f5f6;
  --text-2:#a8b3b7;
  --text-3:#6f7c81;
  --radius-card:16px;
  --radius-sm:12px;
  --radius-pill:999px;
  --shadow-card:0 20px 40px -24px rgba(0,0,0,.8);
  --glow:0 0 0 1px rgba(255,183,77,.5),0 8px 28px -8px rgba(255,157,30,.55);
  --glow-hover:0 0 0 1px rgba(255,183,77,.62),0 12px 36px -6px rgba(255,157,30,.7);
  --glass:linear-gradient(160deg,rgba(255,255,255,.055),rgba(255,255,255,.015));
  --container:1200px;
  --font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*,*::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-2);
  font-family:var(--font);
  font-size:16px;
  line-height:1.9;
  letter-spacing:.2px;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body.nav-open{overflow:hidden}
img{max-width:100%;display:block;border-radius:var(--radius-sm)}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
h1,h2,h3,h4{margin:0;color:var(--text-1);font-weight:700;line-height:1.3}
p{margin:0 0 1.1em}
p:last-child{margin-bottom:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px}
::selection{background:rgba(255,183,77,.28);color:#fff}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:110px 0}
.section--tight{padding:80px 0}
.section--alt{background:linear-gradient(180deg,rgba(255,255,255,.018),rgba(255,255,255,0))}
.divider{height:1px;background:var(--line);border:none;margin:0}

.section-head{max-width:720px;margin-bottom:52px}
.section-head--center{margin-left:auto;margin-right:auto;text-align:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:1.6px;text-transform:uppercase;
  color:var(--accent);font-family:var(--mono);margin-bottom:16px;
}
.eyebrow::before{content:"";width:18px;height:1px;background:var(--accent);display:block}
.section-title{font-size:29px;letter-spacing:.5px;position:relative;padding-left:16px}
.section-title::before{
  content:"";position:absolute;left:0;top:8px;bottom:8px;width:3px;
  background:linear-gradient(180deg,var(--primary),var(--primary-strong));
  border-radius:3px;
}
.section-head--center .section-title{padding-left:0}
.section-head--center .section-title::before{display:none}
.section-desc{margin-top:16px;color:var(--text-2);font-size:15.5px}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--radius-pill);
  font-size:15px;font-weight:600;letter-spacing:.4px;
  padding:14px 30px;transition:all .22s ease;white-space:nowrap;
}
.btn--primary{
  background:linear-gradient(135deg,var(--primary),var(--primary-strong));
  color:#11171a;box-shadow:var(--glow);
}
.btn--primary:hover{transform:translateY(-1px);box-shadow:var(--glow-hover)}
.btn--primary:active{transform:translateY(0);box-shadow:0 0 0 1px rgba(255,183,77,.4)}
.btn--ghost{
  border:1px solid var(--line);color:var(--text-2);background:rgba(255,255,255,.02);
}
.btn--ghost:hover{border-color:var(--accent);color:var(--text-1)}
.btn--sm{padding:10px 22px;font-size:14px}
.btn--block{width:100%}

/* ============ 标签 ============ */
.tag{
  display:inline-flex;align-items:center;
  font-size:12px;letter-spacing:.4px;line-height:1;
  padding:6px 12px;border-radius:var(--radius-pill);
  border:1px solid rgba(79,209,197,.42);color:var(--accent);
  background:rgba(79,209,197,.06);
}
.tag--solid{background:var(--primary);border-color:var(--primary);color:#11171a;font-weight:700}
.tag-row{display:flex;flex-wrap:wrap;gap:10px}

/* ============ 导航 ============ */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:80;
  height:72px;display:flex;align-items:center;
  background:rgba(11,15,16,.72);
  transition:background .3s ease,box-shadow .3s ease,border-color .3s ease;
  border-bottom:1px solid transparent;
}
.site-header.is-scrolled{
  background:rgba(11,15,16,.9);
  backdrop-filter:blur(16px) saturate(130%);
  -webkit-backdrop-filter:blur(16px) saturate(130%);
  border-bottom-color:var(--line);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:inline-flex;align-items:center;gap:12px}
.brand__mark{
  width:36px;height:36px;border-radius:11px;flex:0 0 auto;
  display:grid;place-items:center;
  background:linear-gradient(140deg,rgba(255,183,77,.9),rgba(255,157,30,.6));
  color:#11171a;font-weight:800;font-size:17px;font-family:var(--mono);
}
.brand__text{font-size:17px;font-weight:700;color:var(--text-1);letter-spacing:.6px;white-space:nowrap}
.nav-desktop{display:flex;align-items:center;gap:34px}
.nav-link{
  position:relative;font-size:15px;color:var(--text-2);
  padding:6px 0;transition:color .2s ease;
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:var(--primary);transform:scaleX(0);transform-origin:left;
  transition:transform .25s ease;
}
.nav-link:hover{color:var(--text-1)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--text-1)}
.nav-link.is-active::after{transform:scaleX(1)}
.nav-link.is-active::before{
  content:"";position:absolute;right:-9px;top:2px;
  width:4px;height:4px;border-radius:50%;background:var(--primary);
}
.header-actions{display:flex;align-items:center;gap:14px}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:12px;
  border:1px solid var(--line);place-items:center;
}
.nav-toggle svg{stroke:var(--text-1);stroke-width:1.5;fill:none}
.nav-drawer{
  position:fixed;inset:0;z-index:90;background:var(--bg-0);
  padding:96px 28px 40px;
  transform:translateY(-102%);transition:transform .38s cubic-bezier(.4,0,.2,1);
  display:flex;flex-direction:column;gap:6px;
}
.nav-drawer.is-open{transform:translateY(0)}
.nav-drawer a{
  font-size:22px;color:var(--text-1);padding:20px 0;
  border-bottom:1px solid var(--line);
}
.nav-drawer a.is-active{color:var(--primary)}
.nav-drawer__close{
  position:absolute;top:22px;right:24px;width:44px;height:44px;
  border:1px solid var(--line);border-radius:12px;display:grid;place-items:center;
}
.nav-drawer__close svg{stroke:var(--text-1);stroke-width:1.5;fill:none}
.nav-drawer .btn{margin-top:28px;align-self:flex-start}

/* ============ Hero ============ */
.hero{
  position:relative;padding:168px 0 96px;overflow:hidden;
  background-image:linear-gradient(180deg,rgba(11,15,16,.82),rgba(11,15,16,.95)),url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;
}
.hero::after{
  content:"";position:absolute;inset:auto 0 0 0;height:180px;
  background:linear-gradient(180deg,rgba(11,15,16,0),var(--bg-0));pointer-events:none;
}
.hero-grid{
  position:relative;z-index:2;
  display:grid;grid-template-columns:1.05fr .95fr;gap:64px;align-items:center;
}
.hero-badge{
  display:inline-flex;align-items:center;gap:10px;
  padding:8px 16px;border-radius:var(--radius-pill);
  border:1px solid var(--line);background:rgba(255,255,255,.03);
  font-size:13px;color:var(--text-2);
}
.hero-badge i{width:6px;height:6px;border-radius:50%;background:var(--accent);display:block}
.hero h1{
  font-size:44px;line-height:1.26;letter-spacing:.6px;margin:24px 0 0;
}
.hero h1 em{font-style:normal;color:var(--primary)}
.hero-sub{
  margin-top:20px;font-size:18px;color:var(--text-1);font-weight:500;letter-spacing:.4px;
}
.hero-desc{margin-top:18px;font-size:15.5px;max-width:560px}
.hero-actions{display:flex;flex-wrap:wrap;gap:16px;margin-top:34px}
.trust-row{
  display:flex;flex-wrap:wrap;gap:14px 40px;margin-top:44px;
  padding-top:28px;border-top:1px solid var(--line);
}
.trust-item{display:flex;align-items:baseline;gap:10px}
.trust-item b{font-family:var(--mono);font-size:22px;color:var(--primary);font-weight:700}
.trust-item span{font-size:13px;color:var(--text-3)}

.hero-visual{position:relative}
.hero-visual__main{
  border-radius:20px;overflow:hidden;border:1px solid var(--line);
  box-shadow:var(--shadow-card);
}
.hero-visual__main img{width:100%;height:380px;object-fit:cover;border-radius:0}
.hero-float{
  position:absolute;right:-18px;top:-26px;width:190px;
  padding:16px;border-radius:16px;
  background:var(--glass);border:1px solid var(--line);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  box-shadow:var(--shadow-card);
}
.hero-float img{height:88px;object-fit:cover;width:100%}
.hero-float p{margin:10px 0 0;font-size:12.5px;color:var(--text-3);line-height:1.6}
.hero-card{
  position:absolute;left:-14px;bottom:-22px;width:230px;
  padding:18px;border-radius:16px;
  background:var(--glass);border:1px solid var(--line);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  box-shadow:var(--shadow-card);
}
.hero-card h4{font-size:14px;margin-bottom:8px}
.hero-card p{font-size:12.5px;color:var(--text-3);margin:0;line-height:1.7}

/* ============ 卖点非对称 ============ */
.feature-grid{
  display:grid;grid-template-columns:1.35fr 1fr 1fr;gap:22px;align-items:stretch;
}
.card{
  position:relative;border-radius:var(--radius-card);
  background:var(--glass);border:1px solid var(--line);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  box-shadow:var(--shadow-card);
  transition:transform .2s ease,border-color .2s ease;
}
.card:hover{transform:translateY(-2px);border-color:var(--line-strong)}
.card--pad{padding:30px}
.feature-main{display:flex;flex-direction:column;overflow:hidden}
.feature-main img{height:210px;width:100%;object-fit:cover;border-radius:0}
.feature-main__body{padding:28px;display:flex;flex-direction:column;flex:1}
.feature-main__body h3{font-size:22px;margin-bottom:14px}
.feature-main__body p{font-size:15px;flex:1}
.feature-small{padding:28px;display:flex;flex-direction:column}
.icon-box{
  width:46px;height:46px;border-radius:14px;display:grid;place-items:center;
  border:1px solid rgba(79,209,197,.32);background:rgba(79,209,197,.07);margin-bottom:20px;
}
.icon-box svg{stroke:var(--accent);stroke-width:1.5;fill:none}
.feature-small h3{font-size:18px;margin-bottom:12px}
.feature-small p{font-size:14.5px;color:var(--text-2)}
.num-index{
  font-family:var(--mono);font-size:13px;color:var(--primary);
  letter-spacing:1px;margin-bottom:14px;display:block;
}

/* ============ 场景交替 ============ */
.scene{
  display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center;
}
.scene + .scene{margin-top:96px}
.scene--reverse .scene-media{order:2}
.scene-media{
  border-radius:20px;overflow:hidden;border:1px solid var(--line);
  box-shadow:var(--shadow-card);position:relative;
}
.scene-media img{width:100%;height:330px;object-fit:cover;border-radius:0}
.scene-media__label{
  position:absolute;left:18px;top:18px;
  padding:7px 14px;border-radius:var(--radius-pill);
  background:rgba(11,15,16,.72);border:1px solid var(--line);
  font-size:12px;color:var(--text-1);letter-spacing:.6px;
  backdrop-filter:blur(8px);
}
.scene-body h2{font-size:26px;margin-bottom:18px}
.scene-list{margin-top:24px;display:flex;flex-direction:column;gap:2px}
.scene-list li{
  display:flex;gap:14px;padding:16px 0;border-top:1px solid var(--line);
  font-size:15px;color:var(--text-2);
}
.scene-list li:last-child{border-bottom:1px solid var(--line)}
.scene-list span{
  font-family:var(--mono);font-size:12px;color:var(--primary);
  flex:0 0 auto;padding-top:4px;
}

/* ============ 流程 ============ */
.flow{
  display:grid;grid-template-columns:repeat(4,1fr);gap:22px;
}
.flow-step{
  padding:26px;border-radius:var(--radius-card);
  border:1px solid var(--line);background:var(--bg-1);
  position:relative;transition:border-color .2s ease,transform .2s ease;
}
.flow-step:hover{border-color:var(--line-strong);transform:translateY(-2px)}
.flow-step b{
  font-family:var(--mono);font-size:13px;color:var(--primary);
  letter-spacing:1px;display:block;margin-bottom:18px;
}
.flow-step h3{font-size:17px;margin-bottom:10px}
.flow-step p{font-size:14px;color:var(--text-2)}
.flow-bar{height:3px;border-radius:3px;background:var(--line);margin-top:20px;overflow:hidden}
.flow-bar i{display:block;height:100%;background:linear-gradient(90deg,var(--primary),var(--primary-strong));border-radius:3px}

/* ============ 快捷入口卡 ============ */
.entry-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.entry-card{
  padding:28px;border-radius:var(--radius-card);
  border:1px solid var(--line);background:var(--bg-1);
  display:flex;flex-direction:column;gap:12px;
  transition:border-color .2s ease,background .2s ease,transform .2s ease;
}
.entry-card:hover{border-color:var(--line-strong);transform:translateY(-2px);background:var(--bg-2)}
.entry-card h3{font-size:18px}
.entry-card p{font-size:14.5px;color:var(--text-2);flex:1}
.entry-card .link-more{
  font-size:14px;color:var(--primary);display:inline-flex;align-items:center;gap:6px;
}
.entry-card .link-more svg{stroke:var(--primary);stroke-width:1.5;fill:none;transition:transform .2s ease}
.entry-card:hover .link-more svg{transform:translateX(4px)}

/* ============ 资讯列表（CMS） ============ */
.news-head{
  display:flex;align-items:flex-end;justify-content:space-between;
  gap:24px;margin-bottom:48px;flex-wrap:wrap;
}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.news-card{
  border-radius:var(--radius-card);overflow:hidden;
  background:var(--glass);border:1px solid var(--line);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  box-shadow:var(--shadow-card);
  transition:transform .2s ease,border-color .2s ease;display:flex;flex-direction:column;
}
.news-card:hover{transform:translateY(-2px);border-color:var(--line-strong)}
.news-cover{
  height:150px;
  background:linear-gradient(140deg,rgba(255,183,77,.24),rgba(79,209,197,.14) 55%,rgba(22,30,34,.9));
  display:flex;align-items:flex-end;padding:14px;
}
.news-cover span{
  font-family:var(--mono);font-size:12px;color:rgba(242,245,246,.75);letter-spacing:1px;
}
.news-body{padding:24px;display:flex;flex-direction:column;gap:12px;flex:1}
.news-title{
  font-size:18px;line-height:1.5;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-card:hover .news-title{color:var(--primary)}
.news-excerpt{
  font-size:14px;color:var(--text-2);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-meta{
  margin-top:auto;padding-top:14px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-size:12.5px;color:var(--text-3);font-family:var(--mono);
}
.empty-state{
  grid-column:1/-1;padding:72px 24px;text-align:center;
  border:1px dashed var(--line);border-radius:var(--radius-card);
  color:var(--text-3);font-size:15px;
}
.empty-state svg{stroke:var(--text-3);stroke-width:1.5;fill:none;margin:0 auto 14px}

/* ============ 社会认同 ============ */
.quote-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.quote-card{
  padding:26px;border-radius:var(--radius-card);
  background:var(--glass);border:1px solid var(--line);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  display:flex;flex-direction:column;gap:14px;
  transition:border-color .2s ease,transform .2s ease;
}
.quote-card:hover{border-color:var(--line-strong);transform:translateY(-2px)}
.quote-card b{font-family:var(--mono);font-size:26px;color:var(--primary);line-height:1}
.quote-card p{font-size:14.5px;color:var(--text-2);flex:1}
.quote-card span{font-size:12.5px;color:var(--text-3)}

/* ============ FAQ ============ */
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:880px;margin:0 auto}
.faq-item{
  border-radius:var(--radius-card);border:1px solid var(--line);
  background:var(--glass);overflow:hidden;transition:border-color .2s ease;
}
.faq-item.is-open{border-color:var(--line-strong)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 26px;font-size:16.5px;color:var(--text-1);font-weight:600;
  text-align:left;position:relative;
}
.faq-q::before{
  content:"";position:absolute;left:0;top:16px;bottom:16px;width:3px;
  background:var(--primary);border-radius:3px;opacity:0;transition:opacity .2s ease;
}
.faq-item.is-open .faq-q::before{opacity:1}
.faq-q svg{stroke:var(--primary);stroke-width:1.5;fill:none;flex:0 0 auto;transition:transform .25s ease}
.faq-item.is-open .faq-q svg{transform:rotate(45deg)}
.faq-a{
  max-height:0;overflow:hidden;transition:max-height .24s ease;
}
.faq-a p{padding:0 26px 24px 26px;font-size:15px;color:var(--text-2)}

/* ============ CTA ============ */
.cta-band{
  position:relative;border-radius:22px;overflow:hidden;
  border:1px solid var(--line-strong);
  background-image:linear-gradient(120deg,rgba(11,15,16,.92),rgba(11,15,16,.72)),url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
  padding:64px 56px;display:grid;grid-template-columns:1.4fr 1fr;gap:40px;align-items:center;
}
.cta-band h2{font-size:28px;margin-bottom:16px}
.cta-band p{font-size:15.5px;max-width:520px}
.cta-band__actions{display:flex;flex-direction:column;gap:14px}

/* ============ 页脚 ============ */
.site-footer{
  margin-top:120px;border-top:1px solid var(--line);
  background:var(--bg-1);padding:72px 0 120px;
}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;
}
.footer-col h4{font-size:14px;letter-spacing:1px;color:var(--text-1);margin-bottom:20px;font-weight:600}
.footer-col p{font-size:14px;color:var(--text-3);max-width:300px}
.footer-links{display:flex;flex-direction:column;gap:12px}
.footer-links a{font-size:14px;color:var(--text-2);transition:color .2s ease}
.footer-links a:hover{color:var(--primary)}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:20px}
.footer-bottom{
  margin-top:56px;padding-top:28px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:var(--text-3);
}

/* ============ 固定转化条 ============ */
.sticky-cta{
  position:fixed;left:50%;bottom:26px;transform:translate(-50%,140%);
  z-index:70;display:flex;align-items:center;gap:22px;
  padding:14px 18px 14px 26px;border-radius:var(--radius-pill);
  background:rgba(17,23,26,.94);border:1px solid var(--line-strong);
  backdrop-filter:blur(14px) saturate(130%);
  -webkit-backdrop-filter:blur(14px) saturate(130%);
  box-shadow:0 24px 48px -24px rgba(0,0,0,.9);
  opacity:0;pointer-events:none;transition:transform .34s ease,opacity .34s ease;
  max-width:calc(100% - 32px);
}
.sticky-cta.is-visible{transform:translate(-50%,0);opacity:1;pointer-events:auto}
.sticky-cta p{margin:0;font-size:14.5px;color:var(--text-1);white-space:nowrap}
.sticky-cta__close{
  width:32px;height:32px;border-radius:50%;display:grid;place-items:center;
  border:1px solid var(--line);flex:0 0 auto;
}
.sticky-cta__close:hover{border-color:var(--accent)}
.sticky-cta__close svg{stroke:var(--text-2);stroke-width:1.5;fill:none}

/* ============ 响应式 ============ */
@media (max-width:1280px){
  .hero h1{font-size:40px}
  .quote-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:1100px){
  .feature-grid{grid-template-columns:1fr 1fr}
  .feature-main{grid-column:1/-1;flex-direction:row;align-items:stretch}
  .feature-main img{width:42%;height:auto}
  .flow{grid-template-columns:repeat(2,1fr)}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .entry-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:900px){
  .nav-desktop{display:none}
  .nav-toggle{display:grid}
  .header-actions .btn--primary{display:none}
  .section{padding:76px 0}
  .hero{padding:132px 0 72px}
  .hero-grid{grid-template-columns:1fr;gap:56px}
  .hero-visual__main img{height:300px}
  .hero-float{right:0;top:-20px;width:160px}
  .hero-card{left:0;bottom:-18px;width:200px}
  .scene{grid-template-columns:1fr;gap:32px}
  .scene--reverse .scene-media{order:0}
  .cta-band{grid-template-columns:1fr;padding:44px 30px}
  .cta-band__actions{flex-direction:row;flex-wrap:wrap}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px}
}
@media (max-width:640px){
  .container{padding:0 18px}
  .brand__text{font-size:15.5px}
  .hero h1{font-size:28px;letter-spacing:.3px}
  .hero-sub{font-size:16px}
  .hero-desc{font-size:15px}
  .section-title{font-size:23px}
  .section{padding:64px 0}
  .feature-grid{grid-template-columns:1fr}
  .feature-main{flex-direction:column}
  .feature-main img{width:100%;height:190px}
  .flow{grid-template-columns:1fr}
  .news-grid{grid-template-columns:1fr}
  .entry-grid{grid-template-columns:1fr}
  .quote-grid{grid-template-columns:1fr}
  .hero-actions .btn{width:100%}
  .cta-band{background-position:center;padding:36px 22px}
  .cta-band h2{font-size:22px}
  .cta-band__actions{flex-direction:column}
  .cta-band__actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr}
  .site-footer{padding:56px 0 132px}
  .sticky-cta{
    left:0;right:0;bottom:0;transform:translate(0,140%);
    border-radius:18px 18px 0 0;gap:14px;padding:14px 16px;max-width:none;
    justify-content:space-between;
  }
  .sticky-cta.is-visible{transform:translate(0,0)}
  .sticky-cta p{font-size:14px;white-space:normal}
  .sticky-cta .btn{padding:12px 20px;font-size:14px}
}

/* roulang page: article */
:root{
  --bg-0:#0b0f10;
  --bg-1:#11171a;
  --bg-2:#161e22;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,183,77,.28);
  --primary:#ffb74d;
  --primary-strong:#ff9d1e;
  --accent:#4fd1c5;
  --text-1:#f2f5f6;
  --text-2:#a8b3b7;
  --text-3:#6f7c81;
  --danger:#ff7a6b;
  --radius-card:16px;
  --radius-btn:999px;
  --radius-sm:12px;
  --shadow-card:0 20px 40px -24px rgba(0,0,0,.8);
  --glow:0 0 0 1px rgba(255,183,77,.5), 0 8px 28px -8px rgba(255,157,30,.55);
  --glow-hover:0 12px 36px -6px rgba(255,157,30,.7);
  --font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --header-h:72px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--text-1);
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  background:
    radial-gradient(900px 520px at 12% -8%, rgba(79,209,197,.10), transparent 62%),
    radial-gradient(760px 460px at 88% 4%, rgba(255,183,77,.10), transparent 60%);
  pointer-events:none;
  z-index:0;
}
img{max-width:100%;display:block;border-style:none}
a{color:inherit;text-decoration:none}
button{font-family:inherit}
h1,h2,h3,h4{margin:0;font-weight:700;color:var(--text-1);letter-spacing:.5px}
p{margin:0}
ul,ol{margin:0;padding:0}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;position:relative;z-index:1}
::selection{background:rgba(255,183,77,.28);color:#fff}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  height:var(--header-h);
  display:flex;align-items:center;
  background:rgba(11,15,16,.82);
  backdrop-filter:blur(14px) saturate(120%);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:inline-flex;align-items:center;gap:10px;min-width:0}
.brand__mark{
  width:32px;height:32px;flex:none;border-radius:9px;
  display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(150deg,var(--primary),var(--primary-strong));
  color:#11171a;font-weight:700;font-size:16px;
}
.brand__text{font-size:17px;font-weight:700;color:var(--text-1);letter-spacing:.6px;white-space:nowrap}
.nav-desktop{display:flex;align-items:center;gap:30px}
.nav-link{
  position:relative;
  font-size:15px;color:var(--text-2);
  padding:6px 0;transition:color .2s ease;
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:1px;
  background:var(--primary);transform:scaleX(0);transform-origin:left;
  transition:transform .25s ease;
}
.nav-link:hover{color:var(--text-1)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--text-1)}
.nav-link.is-active::after{transform:scaleX(1)}
.nav-link.is-active::before{
  content:"";position:absolute;right:-8px;top:2px;width:4px;height:4px;border-radius:50%;
  background:var(--primary);
}
.header-actions{display:flex;align-items:center;gap:12px}
.nav-toggle{
  display:none;align-items:center;justify-content:center;
  width:40px;height:40px;border-radius:10px;
  background:transparent;border:1px solid var(--line);color:var(--text-1);cursor:pointer;
  transition:border-color .2s ease,color .2s ease;
}
.nav-toggle:hover{border-color:var(--accent);color:var(--accent)}
.nav-toggle svg{fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;line-height:1;
  padding:14px 26px;border:1px solid transparent;cursor:pointer;
  transition:transform .2s ease,box-shadow .25s ease,border-color .2s ease,color .2s ease,background .2s ease;
  white-space:nowrap;
}
.btn--sm{padding:11px 20px;font-size:14px}
.btn--primary{
  background:linear-gradient(135deg,var(--primary),var(--primary-strong));
  color:#11171a;box-shadow:var(--glow);
}
.btn--primary:hover{transform:translateY(-1px);box-shadow:var(--glow-hover)}
.btn--primary:active{transform:translateY(0);box-shadow:var(--glow)}
.btn--ghost{background:transparent;border-color:var(--line);color:var(--text-2)}
.btn--ghost:hover{border-color:var(--accent);color:var(--text-1)}

.pill{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:999px;
  font-size:12px;letter-spacing:.4px;line-height:1.4;
}
.pill--accent{border:1px solid rgba(79,209,197,.4);color:var(--accent);background:rgba(79,209,197,.06)}
.pill--primary{background:var(--primary);color:#11171a;font-weight:700}

/* ---------- article hero ---------- */
.article-hero{
  position:relative;
  padding:44px 0 36px;
  border-bottom:1px solid var(--line);
  background-image:linear-gradient(180deg,rgba(11,15,16,.72),rgba(11,15,16,.95)),url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
}
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  font-size:13px;color:var(--text-3);margin-bottom:26px;
}
.breadcrumb a{color:var(--text-3);transition:color .2s ease}
.breadcrumb a:hover{color:var(--primary)}
.crumb-sep{color:rgba(255,255,255,.18)}
.crumb-current{color:var(--text-2);max-width:520px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.article-head{max-width:820px}
.article-head h1{
  font-size:40px;line-height:1.28;letter-spacing:.5px;
  margin:18px 0 18px;
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:12px;
  font-size:13px;color:var(--text-3);letter-spacing:.4px;
}
.article-meta .dot{width:3px;height:3px;border-radius:50%;background:var(--text-3);opacity:.7}

/* ---------- article body ---------- */
.article-main{padding:72px 0 0}
.article-layout{display:block}
.article-body{
  max-width:760px;margin:0 auto;
  font-size:16px;color:var(--text-2);
}
.article-body > *:first-child{margin-top:0}
.article-body h2{
  position:relative;font-size:26px;line-height:1.35;margin:48px 0 18px;padding-left:16px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:8px;width:3px;height:20px;border-radius:2px;
  background:var(--primary);
}
.article-body h3{font-size:19px;line-height:1.45;margin:34px 0 14px;color:var(--text-1)}
.article-body h4{font-size:17px;margin:26px 0 12px;color:var(--text-1)}
.article-body p{margin:0 0 18px;line-height:2.0}
.article-body a{color:var(--primary);text-decoration:underline;text-underline-offset:4px}
.article-body a:hover{color:var(--primary-strong)}
.article-body strong{color:var(--text-1)}
.article-body img{border-radius:var(--radius-sm);margin:22px 0;box-shadow:var(--shadow-card)}
.article-body figure{margin:24px 0}
.article-body figcaption{font-size:13px;color:var(--text-3);text-align:center;margin-top:-8px}
.article-body ul,.article-body ol{margin:0 0 20px;padding-left:24px}
.article-body li{line-height:1.95;margin-bottom:9px}
.article-body ul li::marker{color:var(--primary)}
.article-body ol li::marker{color:var(--primary);font-family:var(--mono)}
.article-body blockquote{
  margin:26px 0;padding:16px 20px 16px 22px;
  border-left:3px solid var(--primary);
  background:var(--bg-1);border-radius:0 var(--radius-sm) var(--radius-sm) 0;
  color:var(--text-2);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body hr{border:0;border-top:1px solid var(--line);margin:36px 0}
.article-body code{
  font-family:var(--mono);font-size:.9em;color:var(--accent);
  background:var(--bg-1);padding:2px 7px;border-radius:6px;
}
.article-body pre{
  background:var(--bg-1);border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:16px 18px;overflow-x:auto;margin:0 0 22px;
}
.article-body pre code{background:none;padding:0;color:var(--text-2)}
.article-body table{
  width:100%;border-collapse:collapse;background:var(--bg-1);
  border:1px solid var(--line);border-radius:var(--radius-sm);overflow:hidden;
  margin:0 0 24px;font-size:14px;display:table;
}
.article-body th,.article-body td{padding:12px 15px;border-bottom:1px solid var(--line);text-align:left}
.article-body th{color:var(--text-1);background:rgba(255,255,255,.03);font-weight:600}
.article-body tr:last-child td{border-bottom:0}

.empty-state{
  text-align:center;padding:64px 24px;
  border:1px solid var(--line);border-radius:var(--radius-card);
  background:linear-gradient(160deg,rgba(255,255,255,.055),rgba(255,255,255,.015));
}
.empty-state svg{width:36px;height:36px;stroke:var(--text-3);fill:none;stroke-width:1.5;margin:0 auto 16px}
.empty-state p{font-size:16px;color:var(--text-2);margin-bottom:22px}

/* ---------- tags ---------- */
.article-foot{max-width:760px;margin:40px auto 0}
.article-tags{display:flex;flex-wrap:wrap;align-items:center;gap:10px;padding-top:26px;border-top:1px solid var(--line)}
.tag-label{font-size:13px;color:var(--text-3);letter-spacing:.4px}
.tag{
  display:inline-flex;align-items:center;
  padding:6px 13px;border-radius:999px;
  border:1px solid var(--line);font-size:13px;color:var(--text-2);
  transition:border-color .2s ease,color .2s ease,transform .2s ease;
}
.tag:hover{border-color:var(--line-strong);color:var(--primary);transform:translateY(-1px)}

/* ---------- sections ---------- */
.section{padding:88px 0}
.section--tight{padding:64px 0}
.section-head{max-width:680px;margin-bottom:40px}
.section-head .eyebrow{
  display:inline-block;font-size:12px;letter-spacing:2px;color:var(--accent);
  text-transform:uppercase;margin-bottom:14px;
}
.section-head h2{font-size:28px;line-height:1.35;margin-bottom:14px}
.section-head p{color:var(--text-2);font-size:15.5px;line-height:1.9}

.grid-3{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:22px}
.card{
  position:relative;display:flex;flex-direction:column;
  background:linear-gradient(160deg,rgba(255,255,255,.055),rgba(255,255,255,.015));
  backdrop-filter:blur(14px) saturate(120%);
  border:1px solid var(--line);border-radius:var(--radius-card);
  overflow:hidden;box-shadow:var(--shadow-card);
  transition:transform .2s ease,border-color .2s ease;
}
.card:hover{transform:translateY(-2px);border-color:var(--line-strong)}
.card__media{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--bg-1)}
.card__media img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.card:hover .card__media img{transform:scale(1.04)}
.card__media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(11,15,16,.05),rgba(11,15,16,.55));
}
.card__body{padding:22px 22px 24px;display:flex;flex-direction:column;gap:12px;flex:1}
.card__body h3{font-size:18px;line-height:1.5}
.card__body p{font-size:14.5px;color:var(--text-2);line-height:1.85;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card__meta{display:flex;align-items:center;gap:10px;font-size:12.5px;color:var(--text-3);letter-spacing:.4px;margin-top:auto}
.card__link{
  display:inline-flex;align-items:center;gap:6px;font-size:14px;color:var(--primary);
  margin-top:4px;
}
.card__link svg{width:15px;height:15px;fill:none;stroke:currentColor;stroke-width:1.5}
.card--link{cursor:pointer}

/* ---------- stats strip ---------- */
.stats{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:20px;
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  padding:38px 0;
}
.stat{display:flex;flex-direction:column;gap:6px}
.stat__num{font-family:var(--mono);font-size:28px;color:var(--primary);letter-spacing:1px}
.stat__txt{font-size:13.5px;color:var(--text-3)}

/* ---------- faq ---------- */
.faq-list{max-width:860px;display:flex;flex-direction:column;gap:12px}
.faq-item{
  border:1px solid var(--line);border-radius:var(--radius-card);
  background:linear-gradient(160deg,rgba(255,255,255,.05),rgba(255,255,255,.012));
  overflow:hidden;transition:border-color .2s ease;
}
.faq-item[open]{border-color:var(--line-strong);box-shadow:0 0 0 1px rgba(255,183,77,.12) inset}
.faq-item summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;min-height:56px;
  font-size:16px;color:var(--text-1);font-weight:600;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"";flex:none;width:9px;height:9px;
  border-right:1.5px solid var(--text-3);border-bottom:1.5px solid var(--text-3);
  transform:rotate(45deg);transition:transform .25s ease,border-color .2s ease;
}
.faq-item[open] summary::after{transform:rotate(-135deg);border-color:var(--primary)}
.faq-item summary:hover::after{border-color:var(--primary)}
.faq-body{padding:0 22px 22px;border-left:3px solid transparent;transition:border-color .2s ease}
.faq-item[open] .faq-body{border-left-color:var(--primary)}
.faq-body p{color:var(--text-2);font-size:15px;line-height:1.95}

/* ---------- cta ---------- */
.cta-band{
  padding:64px 0 88px;
}
.cta-card{
  position:relative;overflow:hidden;
  border:1px solid var(--line-strong);border-radius:24px;
  padding:52px 48px;
  background-image:linear-gradient(120deg,rgba(11,15,16,.9),rgba(11,15,16,.72)),url('/assets/images/backpic/back-3.webp');
  background-size:cover;background-position:center;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:28px;
}
.cta-card h2{font-size:28px;line-height:1.35;margin-bottom:12px}
.cta-card p{color:var(--text-2);font-size:15.5px;max-width:560px;line-height:1.9}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px}

/* ---------- footer ---------- */
.site-footer{
  border-top:1px solid var(--line);
  background:var(--bg-1);
  padding:64px 0 28px;
  position:relative;z-index:1;
}
.footer-grid{
  display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:34px;
  padding-bottom:38px;border-bottom:1px solid var(--line);
}
.footer-col h4{font-size:15px;margin-bottom:16px;letter-spacing:.6px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-col p{font-size:14px;color:var(--text-2);line-height:1.95;max-width:340px}
.footer-links{display:flex;flex-direction:column;gap:11px}
.footer-links a{
  font-size:14px;color:var(--text-2);width:fit-content;
  transition:color .2s ease,transform .2s ease;
}
.footer-links a:hover{color:var(--primary);transform:translateX(2px)}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  padding-top:22px;font-size:13px;color:var(--text-3);letter-spacing:.4px;
}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .article-head h1{font-size:34px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
}
@media (max-width:900px){
  .nav-desktop{
    position:fixed;left:0;right:0;top:var(--header-h);bottom:0;
    flex-direction:column;align-items:stretch;gap:0;
    background:var(--bg-0);padding:16px 24px 40px;
    transform:translateX(102%);transition:transform .3s ease;
    overflow-y:auto;border-top:1px solid var(--line);
  }
  .nav-desktop.is-open{transform:translateX(0)}
  .nav-link{font-size:20px;padding:20px 0;border-bottom:1px solid var(--line);color:var(--text-1)}
  .nav-link::after{display:none}
  .nav-link.is-active{color:var(--primary)}
  .nav-link.is-active::before{right:4px;top:26px;width:6px;height:6px}
  .nav-toggle{display:inline-flex}
  .section{padding:64px 0}
  .article-main{padding:52px 0 0}
  .article-hero{padding:30px 0 28px}
  .article-head h1{font-size:30px}
  .cta-card{padding:38px 26px}
  .cta-card h2{font-size:23px}
}
@media (max-width:640px){
  .container{padding:0 16px}
  .brand__text{font-size:15px}
  .article-head h1{font-size:26px;line-height:1.32}
  .article-body{font-size:15.5px}
  .article-body h2{font-size:21px;margin:36px 0 14px}
  .article-body h3{font-size:17.5px}
  .crumb-current{max-width:200px}
  .section-head h2{font-size:22px}
  .stats{grid-template-columns:1fr 1fr;gap:16px}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .btn{width:100%}
  .header-actions .btn--sm{display:none}
  .cta-actions{width:100%}
}
@media (max-width:520px){
  .article-head h1{font-size:23px}
  .stat__num{font-size:23px}
  .card__body{padding:18px}
}

/* roulang page: category1 */
:root{
  --bg-0:#0b0f10;
  --bg-1:#11171a;
  --bg-2:#161e22;
  --line:rgba(255,255,255,.08);
  --line-accent:rgba(255,183,77,.28);
  --primary:#ffb74d;
  --primary-strong:#ff9d1e;
  --accent:#4fd1c5;
  --danger:#ff7a6b;
  --text-1:#f2f5f6;
  --text-2:#a8b3b7;
  --text-3:#6f7c81;
  --radius:16px;
  --radius-sm:12px;
  --radius-lg:20px;
  --shadow:0 20px 40px -24px rgba(0,0,0,.8);
  --font-cn:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*,*::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-2);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.9;
  letter-spacing:.2px;
  -webkit-font-smoothing:antialiased;
  background-image:radial-gradient(900px 420px at 12% -8%,rgba(255,183,77,.10),transparent 62%),radial-gradient(760px 420px at 88% 4%,rgba(79,209,197,.07),transparent 60%);
  background-repeat:no-repeat;
}
img{max-width:100%;display:block;border-radius:var(--radius-sm)}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;color:var(--text-1);font-weight:700;letter-spacing:.4px}
p{margin:0 0 1.1em}
p:last-child{margin-bottom:0}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px}
.container{max-width:1200px;margin:0 auto;padding:0 24px}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 24px;border-radius:999px;font-size:15px;font-weight:600;
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease,color .2s ease,background-color .2s ease;
  white-space:nowrap;
}
.btn--primary{
  background:linear-gradient(120deg,var(--primary),var(--primary-strong));
  color:#11171a;
  box-shadow:0 0 0 1px rgba(255,183,77,.5),0 8px 28px -8px rgba(255,157,30,.55);
}
.btn--primary:hover{
  transform:translateY(-1px);
  box-shadow:0 0 0 1px rgba(255,183,77,.62),0 12px 36px -6px rgba(255,157,30,.7);
}
.btn--ghost{
  border:1px solid var(--line);
  color:var(--text-1);
  background:rgba(255,255,255,.015);
}
.btn--ghost:hover{border-color:var(--accent);color:var(--text-1);transform:translateY(-1px)}
.btn--sm{padding:9px 16px;font-size:14px}
.btn--block{width:100%}

/* ============ 标签 ============ */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:999px;font-size:12px;letter-spacing:.4px;
  border:1px solid rgba(79,209,197,.35);color:var(--accent);
  background:rgba(79,209,197,.06);
}
.tag--amber{border-color:var(--line-accent);color:var(--primary);background:rgba(255,183,77,.08)}

/* ============ 头部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:70;
  background:rgba(11,15,16,.72);
  backdrop-filter:blur(12px) saturate(120%);
  border-bottom:1px solid transparent;
  transition:background-color .25s ease,border-color .25s ease;
}
.site-header.is-scrolled{background:rgba(11,15,16,.93);border-bottom-color:var(--line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:72px}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--text-1);font-weight:700}
.brand__mark{
  width:34px;height:34px;border-radius:10px;display:grid;place-items:center;
  background:linear-gradient(150deg,var(--primary),var(--primary-strong));
  color:#11171a;font-size:17px;font-weight:800;line-height:1;flex:none;
}
.brand__text{font-size:16px;letter-spacing:.5px}
.nav-desktop{display:flex;align-items:center;gap:4px}
.nav-link{
  position:relative;display:inline-block;padding:8px 14px;border-radius:999px;
  font-size:15px;color:var(--text-2);transition:color .2s ease;
}
.nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:1px;
  background:var(--primary);transform:scaleX(0);transform-origin:left;
  transition:transform .25s ease;
}
.nav-link:hover{color:var(--text-1)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--text-1)}
.nav-link.is-active::after{transform:scaleX(1)}
.nav-link.is-active::before{
  content:"";position:absolute;top:3px;right:5px;width:4px;height:4px;border-radius:50%;
  background:var(--primary);
}
.nav-cta{display:none}
.header-actions{display:flex;align-items:center;gap:12px}
.nav-toggle{
  display:none;align-items:center;justify-content:center;
  width:40px;height:40px;border-radius:12px;border:1px solid var(--line);
  color:var(--text-1);transition:border-color .2s ease;
}
.nav-toggle:hover{border-color:var(--accent)}
.nav-toggle svg{fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round}

/* ============ Hero ============ */
.hero{position:relative;padding:78px 0 92px;overflow:hidden;border-bottom:1px solid var(--line)}
.hero__bg{
  position:absolute;inset:0;
  background-image:linear-gradient(180deg,rgba(11,15,16,.86),rgba(11,15,16,.93) 58%,var(--bg-0)),url(/assets/images/backpic/back-1.png);
  background-size:cover;background-position:center;
}
.hero__grid{position:relative;display:grid;grid-template-columns:1.02fr .98fr;gap:56px;align-items:center}
.hero h1{font-size:clamp(30px,3.6vw,46px);line-height:1.25;margin:18px 0 16px;letter-spacing:.6px}
.hero__sub{font-size:17px;color:var(--text-2);max-width:520px;margin-bottom:28px}
.hero__actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:36px}
.stats{display:flex;flex-wrap:wrap;gap:14px 40px}
.stat__num{font-family:var(--font-mono);font-size:24px;font-weight:700;color:var(--primary);line-height:1.2}
.stat__label{font-size:12.5px;color:var(--text-3);letter-spacing:.4px}
.hero__visual{position:relative}
.hero__figure{
  border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--line);
  box-shadow:var(--shadow);background:var(--bg-2);
}
.hero__figure img{width:100%;height:380px;object-fit:cover;border-radius:0}
.hero__float{
  position:absolute;left:-18px;bottom:-22px;width:min(268px,80%);
  padding:16px 18px;border-radius:14px;
  background:linear-gradient(160deg,rgba(255,255,255,.07),rgba(255,255,255,.02));
  border:1px solid var(--line-accent);backdrop-filter:blur(14px) saturate(120%);
  box-shadow:var(--shadow);
}
.hero__float strong{display:block;color:var(--text-1);font-size:14.5px;margin-bottom:4px}
.hero__float span{font-size:12.5px;color:var(--text-3)}

/* ============ 板块通用 ============ */
.section{padding:96px 0}
.section--alt{background:var(--bg-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section__head{max-width:740px;margin-bottom:44px}
.section__title{
  position:relative;padding-left:16px;font-size:clamp(22px,2.4vw,29px);
  line-height:1.35;margin-bottom:14px;
}
.section__title::before{
  content:"";position:absolute;left:0;top:9px;width:3px;height:18px;border-radius:2px;
  background:var(--primary);
}
.section__desc{font-size:15.5px;color:var(--text-2);margin:0}
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}

/* ============ 卡片 ============ */
.card{
  background:linear-gradient(160deg,rgba(255,255,255,.055),rgba(255,255,255,.015));
  border:1px solid var(--line);border-radius:var(--radius);
  backdrop-filter:blur(14px) saturate(120%);
  box-shadow:var(--shadow);
  transition:transform .2s ease,border-color .2s ease;
}
.card:hover{transform:translateY(-2px);border-color:var(--line-accent)}
.grid-3{display:grid;grid-template-columns:repeat(auto-fit,minmax(276px,1fr));gap:20px}

/* ============ 勾选列表 ============ */
.check-list li{
  position:relative;padding:16px 0 16px 26px;border-bottom:1px solid var(--line);
  font-size:15px;color:var(--text-2);
}
.check-list li:last-child{border-bottom:0}
.check-list li::before{
  content:"";position:absolute;left:2px;top:26px;width:7px;height:7px;border-radius:1px;
  background:var(--primary);
}
.check-list li::after{
  content:"";position:absolute;left:-14px;top:12px;bottom:12px;width:3px;border-radius:2px;
  background:var(--primary);opacity:0;transition:opacity .2s ease;
}
.check-list li:hover::after{opacity:1}
.check-list strong{color:var(--text-1);font-weight:600}

/* ============ 图文区块 ============ */
.figure-card{
  border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--line);
  box-shadow:var(--shadow);background:var(--bg-2);
}
.figure-card img{width:100%;height:330px;object-fit:cover;border-radius:0}
.figure-caption{padding:14px 18px;font-size:12.5px;color:var(--text-3);border-top:1px solid var(--line)}

/* ============ 流程节点 ============ */
.flow-bar{position:relative;height:2px;background:var(--line);border-radius:2px;margin-bottom:34px;overflow:hidden}
.flow-bar span{position:absolute;inset:0;background:linear-gradient(90deg,var(--primary),rgba(255,157,30,.15))}
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(196px,1fr));gap:18px}
.step{position:relative;padding:26px 22px}
.step__num{font-family:var(--font-mono);font-size:12.5px;letter-spacing:2px;color:var(--primary)}
.step__title{font-size:17px;line-height:1.45;margin:10px 0 8px}
.step__text{font-size:14.5px;color:var(--text-2);margin:0}

/* ============ 排查卡 ============ */
.trouble{padding:24px 24px 22px}
.trouble h3{font-size:17px;margin-bottom:10px;line-height:1.45}
.trouble p{font-size:14.5px;margin:0;color:var(--text-2)}
.trouble .tag{margin-bottom:14px}

/* ============ 安全清单 ============ */
.safe-list li{
  display:flex;gap:14px;padding:18px 0;border-bottom:1px solid var(--line);
}
.safe-list li:last-child{border-bottom:0}
.safe-list .tick{
  flex:none;width:22px;height:22px;border-radius:7px;margin-top:4px;
  display:grid;place-items:center;border:1px solid var(--line-accent);
  background:rgba(255,183,77,.1);color:var(--primary);
}
.safe-list .tick svg{fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.safe-list strong{display:block;color:var(--text-1);font-size:15.5px;margin-bottom:4px}
.safe-list span{font-size:14.5px;color:var(--text-2)}

/* ============ FAQ ============ */
.faq{display:grid;gap:12px;max-width:880px}
.faq-item{
  position:relative;border:1px solid var(--line);border-radius:14px;overflow:hidden;
  background:linear-gradient(160deg,rgba(255,255,255,.05),rgba(255,255,255,.012));
  transition:border-color .2s ease;
}
.faq-item::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;border-radius:2px;
  background:var(--primary);opacity:0;transition:opacity .2s ease;
}
.faq-item.is-open{border-color:var(--line-accent)}
.faq-item.is-open::before{opacity:1}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;min-height:44px;text-align:left;
  font-size:16px;font-weight:600;color:var(--text-1);transition:color .2s ease;
}
.faq-item.is-open .faq-q{color:var(--primary)}
.faq-icon{flex:none;display:grid;place-items:center;width:22px;height:22px;color:var(--text-3);transition:transform .22s ease,color .2s ease}
.faq-icon svg{fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.faq-item.is-open .faq-icon{transform:rotate(180deg);color:var(--primary)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .22s ease}
.faq-a__inner{padding:0 22px 20px;font-size:15px;color:var(--text-2)}

/* ============ CTA ============ */
.cta-card{
  position:relative;overflow:hidden;border-radius:var(--radius-lg);
  border:1px solid var(--line-accent);
  padding:58px 40px;text-align:center;
  background-image:linear-gradient(180deg,rgba(11,15,16,.88),rgba(11,15,16,.95)),url(/assets/images/backpic/back-2.webp);
  background-size:cover;background-position:center;
  box-shadow:var(--shadow);
}
.cta-card h2{font-size:clamp(22px,2.5vw,30px);margin-bottom:14px}
.cta-card p{max-width:640px;margin:0 auto 30px;font-size:15.5px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--bg-1);border-top:1px solid var(--line);
  padding:72px 0 28px;font-size:14.5px;
}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:40px;
  padding-bottom:40px;
}
.footer-col+.footer-col{border-left:1px solid var(--line);padding-left:40px}
.footer-brand{display:inline-flex;align-items:center;gap:10px;color:var(--text-1);font-weight:700;margin-bottom:14px}
.footer-col h4{font-size:15px;margin-bottom:16px;color:var(--text-1)}
.footer-col p{font-size:14px;color:var(--text-2);margin:0}
.footer-links{display:grid;gap:10px}
.footer-links a{color:var(--text-2);transition:color .2s ease}
.footer-links a:hover{color:var(--primary)}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  border-top:1px solid var(--line);padding-top:22px;
  font-size:13px;color:var(--text-3);letter-spacing:.3px;
}

/* ============ 响应式 ============ */
@media (max-width:1024px){
  .hero{padding:60px 0 76px}
  .hero__grid{grid-template-columns:1fr;gap:44px}
  .hero__figure img{height:320px}
  .hero__float{left:auto;right:16px;bottom:-18px}
  .split{grid-template-columns:1fr;gap:40px}
  .section{padding:76px 0}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .footer-col+.footer-col{border-left:0;padding-left:0}
}
@media (max-width:899px){
  .nav-desktop{
    position:fixed;left:0;right:0;top:72px;bottom:0;z-index:65;
    display:flex;flex-direction:column;align-items:stretch;gap:0;
    padding:12px 24px 32px;background:var(--bg-0);
    border-top:1px solid var(--line);overflow-y:auto;
    opacity:0;visibility:hidden;transform:translateY(-6px);
    transition:opacity .22s ease,transform .22s ease,visibility .22s ease;
  }
  .nav-desktop.is-open{opacity:1;visibility:visible;transform:none}
  .nav-link{padding:20px 2px;font-size:20px;border-bottom:1px solid var(--line);border-radius:0}
  .nav-link::after{display:none}
  .nav-link.is-active{color:var(--primary)}
  .nav-link.is-active::before{top:26px;right:auto;left:-12px}
  .nav-toggle{display:inline-flex}
  .nav-cta{display:inline-flex;margin-top:24px;justify-content:center}
}
@media (max-width:640px){
  .container{padding:0 16px}
  .hero{padding:48px 0 64px}
  .hero h1{font-size:28px}
  .hero__sub{font-size:16px}
  .hero__figure img{height:240px}
  .hero__float{position:static;width:100%;margin-top:16px}
  .section{padding:64px 0}
  .section__head{margin-bottom:32px}
  .stats{gap:12px 28px}
  .stat__num{font-size:21px}
  .figure-card img{height:220px}
  .steps{grid-template-columns:1fr}
  .cta-card{padding:40px 22px}
  .cta-actions .btn{width:100%}
  .hero__actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .site-footer{padding:56px 0 24px}
}
@media (max-width:560px){
  .header-actions .btn--primary{display:none}
  .brand__text{font-size:15px}
}

/* roulang page: category2 */
:root{
  --bg-0:#0b0f10;
  --bg-1:#11171a;
  --bg-2:#161e22;
  --line:rgba(255,255,255,.08);
  --line-accent:rgba(255,183,77,.28);
  --primary:#ffb74d;
  --primary-strong:#ff9d1e;
  --accent:#4fd1c5;
  --text-1:#f2f5f6;
  --text-2:#a8b3b7;
  --text-3:#6f7c81;
  --danger:#ff7a6b;
  --radius:16px;
  --radius-sm:12px;
  --radius-pill:999px;
  --shadow:0 20px 40px -24px rgba(0,0,0,.8);
  --glow:0 0 0 1px rgba(255,183,77,.5),0 8px 28px -8px rgba(255,157,30,.55);
  --container:1200px;
  --font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*,*::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-2);
  font-family:var(--font);
  font-size:16px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{color:var(--text-1);margin:0;font-weight:700;letter-spacing:.4px}
h1{font-size:44px;line-height:1.25}
h2{font-size:28px;line-height:1.35}
h3{font-size:19px;line-height:1.45}
p{margin:0 0 1.1em}
p:last-child{margin-bottom:0}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button{font:inherit;color:inherit}
ul{margin:0;padding:0;list-style:none}
svg{display:block}
::selection{background:rgba(255,183,77,.3);color:#fff}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px}

/* ---------- 布局容器 ---------- */
.container{max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:96px 0;position:relative}
.section--tight{padding:72px 0}
.section--alt{background:var(--bg-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:760px;margin-bottom:44px}
.section-head .eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12px;letter-spacing:.4px;color:var(--accent);margin-bottom:14px}
.section-head .eyebrow::before{content:"";width:18px;height:1px;background:var(--accent);display:block}
.section-head h2{margin-bottom:14px}
.section-head p{color:var(--text-2);font-size:15.5px}
.rule{width:36px;height:3px;background:var(--primary);border-radius:2px;margin:18px 0 0}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(11,15,16,.78);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  border-bottom:1px solid var(--line);
}
.site-header.is-scrolled{background:rgba(11,15,16,.92);border-bottom-color:rgba(255,255,255,.12)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:72px;gap:24px}
.brand{display:inline-flex;align-items:center;gap:12px;flex-shrink:0}
.brand__mark{
  width:34px;height:34px;border-radius:10px;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(150deg,var(--primary),var(--primary-strong));
  color:#0b0f10;font-weight:700;font-size:16px;letter-spacing:0;
}
.brand__text{color:var(--text-1);font-size:17px;font-weight:600;letter-spacing:.6px;white-space:nowrap}
.nav-desktop{display:flex;align-items:center;gap:34px}
.nav-link{
  position:relative;color:var(--text-2);font-size:15px;padding:6px 0;transition:color .2s ease;
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:1px;background:var(--primary);
  transform:scaleX(0);transform-origin:left;transition:transform .25s ease;
}
.nav-link:hover{color:var(--text-1)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--text-1)}
.nav-link.is-active::after{transform:scaleX(1)}
.nav-link.is-active::before{
  content:"";position:absolute;right:-10px;top:10px;width:4px;height:4px;border-radius:50%;background:var(--primary);
}
.header-actions{display:flex;align-items:center;gap:14px}
.nav-toggle{
  display:none;background:transparent;border:1px solid var(--line);border-radius:10px;
  width:40px;height:40px;align-items:center;justify-content:center;cursor:pointer;transition:border-color .2s ease;
}
.nav-toggle svg{stroke:var(--text-1);stroke-width:1.5;fill:none;stroke-linecap:round}
.nav-toggle:hover{border-color:var(--line-accent)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--radius-pill);font-size:15px;font-weight:600;letter-spacing:.3px;
  padding:13px 26px;cursor:pointer;border:1px solid transparent;
  transition:transform .2s ease,box-shadow .25s ease,border-color .2s ease,color .2s ease,background .2s ease;
}
.btn--primary{
  background:linear-gradient(135deg,var(--primary),var(--primary-strong));
  color:#11171a;box-shadow:var(--glow);
}
.btn--primary:hover{transform:translateY(-1px);box-shadow:0 12px 36px -6px rgba(255,157,30,.7)}
.btn--ghost{
  background:transparent;border-color:var(--line);color:var(--text-1);
}
.btn--ghost:hover{border-color:var(--accent);color:var(--text-1);transform:translateY(-1px)}
.btn--sm{padding:9px 18px;font-size:14px}
.btn--block{width:100%}
.btn:disabled{opacity:.5;cursor:not-allowed;box-shadow:none}

/* ---------- 徽章 / 标签 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;font-size:12px;letter-spacing:.4px;
  padding:4px 12px;border-radius:var(--radius-pill);border:1px solid rgba(79,209,197,.4);color:var(--accent);
}
.badge--solid{background:var(--primary);border-color:var(--primary);color:#11171a;font-weight:600}
.badge--ghost{border-color:var(--line);color:var(--text-3)}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}

/* ---------- 页面横幅 ---------- */
.page-hero{position:relative;overflow:hidden;padding:96px 0 84px;border-bottom:1px solid var(--line)}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background:url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  opacity:.38;
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(11,15,16,.72) 0%,rgba(11,15,16,.9) 60%,var(--bg-0) 100%);
}
.page-hero .container{position:relative;z-index:2}
.crumb{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--text-3);margin-bottom:26px}
.crumb a{color:var(--text-3);transition:color .2s ease}
.crumb a:hover{color:var(--primary)}
.crumb span.sep{width:14px;height:1px;background:var(--line);display:block}
.crumb .current{color:var(--text-2)}
.page-hero h1{max-width:860px}
.page-hero .lede{max-width:680px;margin-top:20px;font-size:16px;color:var(--text-2)}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px}
.hero-stats{display:flex;flex-wrap:wrap;gap:44px;margin-top:48px;padding-top:30px;border-top:1px solid var(--line)}
.hero-stat .num{font-family:var(--mono);font-size:26px;color:var(--primary);letter-spacing:.5px;display:block;line-height:1.2}
.hero-stat .label{font-size:13px;color:var(--text-3);letter-spacing:.4px}

/* ---------- 顶部大卡 ---------- */
.feature-card{
  display:grid;grid-template-columns:1.05fr 1fr;gap:0;overflow:hidden;
  background:linear-gradient(160deg,rgba(255,255,255,.055),rgba(255,255,255,.015));
  border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
}
.feature-card__media{position:relative;min-height:380px}
.feature-card__media img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0}
.feature-card__media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(11,15,16,.15),rgba(11,15,16,.65));
}
.feature-card__body{padding:52px 48px;display:flex;flex-direction:column;justify-content:center}
.feature-card__body h2{margin:16px 0 18px;font-size:30px}
.feature-card__body p{font-size:15.5px}
.feature-list{margin-top:26px;display:grid;gap:12px}
.feature-list li{display:flex;gap:12px;align-items:flex-start;font-size:15px;color:var(--text-2)}
.feature-list li svg{flex-shrink:0;margin-top:9px;stroke:var(--accent);stroke-width:1.5;fill:none}

/* ---------- 节点网格 ---------- */
.node-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:20px}
.node-card{
  position:relative;padding:30px 26px;border-radius:var(--radius);
  background:linear-gradient(160deg,rgba(255,255,255,.055),rgba(255,255,255,.015));
  border:1px solid var(--line);transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.node-card:hover{transform:translateY(-2px);border-color:var(--line-accent);box-shadow:var(--shadow)}
.node-card .node-index{font-family:var(--mono);font-size:13px;color:var(--primary);letter-spacing:1px}
.node-card h3{margin:14px 0 10px}
.node-card p{font-size:14.5px;color:var(--text-2)}
.node-card .node-foot{margin-top:20px;font-size:13px;color:var(--text-3);display:flex;align-items:center;gap:8px}
.node-card::before{
  content:"";position:absolute;left:26px;top:0;width:34px;height:2px;background:var(--primary);border-radius:2px;
}

/* ---------- 交替图文 ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.split + .split{margin-top:88px}
.split__media{
  border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow);position:relative;
}
.split__media img{width:100%;height:100%;object-fit:cover;aspect-ratio:16/11}
.split__media::after{
  content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(11,15,16,0),rgba(11,15,16,.35));
}
.split__body h2{margin-bottom:18px}
.split__body p{font-size:15.5px}
.point-list{margin-top:24px;display:grid;gap:14px}
.point-list li{padding-left:18px;position:relative;font-size:15px;color:var(--text-2)}
.point-list li::before{
  content:"";position:absolute;left:0;top:11px;width:8px;height:8px;border-radius:2px;background:var(--accent);opacity:.85;
}
.split--reverse .split__media{order:2}
.split--reverse .split__body{order:1}

/* ---------- 时间线 ---------- */
.timeline{position:relative;margin-top:16px;padding-left:28px}
.timeline::before{content:"";position:absolute;left:5px;top:8px;bottom:8px;width:1px;background:var(--line)}
.timeline-item{position:relative;padding:0 0 34px 0}
.timeline-item:last-child{padding-bottom:0}
.timeline-item::before{
  content:"";position:absolute;left:-28px;top:9px;width:11px;height:11px;border-radius:50%;
  background:var(--bg-0);border:1px solid var(--line-accent);
}
.timeline-item.is-current::before{background:var(--primary);border-color:var(--primary);box-shadow:0 0 0 4px rgba(255,183,77,.14)}
.timeline-item h3{font-size:17px;margin-bottom:8px;display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.timeline-item p{font-size:14.5px;color:var(--text-2);max-width:640px}

/* ---------- 数据卡 ---------- */
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.stat-card{
  padding:28px 24px;border-radius:var(--radius);border:1px solid var(--line);
  background:linear-gradient(160deg,rgba(255,255,255,.055),rgba(255,255,255,.015));
  backdrop-filter:blur(14px) saturate(120%);-webkit-backdrop-filter:blur(14px) saturate(120%);
  transition:transform .2s ease,border-color .2s ease;
}
.stat-card:hover{transform:translateY(-2px);border-color:var(--line-accent)}
.stat-card .num{font-family:var(--mono);font-size:30px;color:var(--primary);line-height:1.2;display:block}
.stat-card .label{margin-top:10px;font-size:14px;color:var(--text-1)}
.stat-card .sub{margin-top:6px;font-size:13px;color:var(--text-3)}

/* ---------- 引用 / 评价 ---------- */
.quote-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.quote-card{
  padding:30px 28px;border-radius:var(--radius);border:1px solid var(--line);background:var(--bg-2);
  display:flex;flex-direction:column;gap:18px;
}
.quote-card blockquote{margin:0;font-size:15.5px;color:var(--text-1);line-height:1.9;position:relative;padding-left:18px}
.quote-card blockquote::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:3px;background:var(--primary);border-radius:2px}
.quote-card .source{font-size:13px;color:var(--text-3);letter-spacing:.4px}

/* ---------- FAQ ---------- */
.faq{display:grid;gap:14px;max-width:900px}
.faq-item{
  border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  background:linear-gradient(160deg,rgba(255,255,255,.05),rgba(255,255,255,.012));
  transition:border-color .2s ease;
}
.faq-item.is-open{border-color:var(--line-accent)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:20px 24px;background:transparent;border:0;text-align:left;cursor:pointer;
  color:var(--text-1);font-size:16px;font-weight:600;line-height:1.6;min-height:44px;
}
.faq-q .chev{flex-shrink:0;transition:transform .25s ease}
.faq-q .chev svg{stroke:var(--text-3);stroke-width:1.5;fill:none;stroke-linecap:round}
.faq-item.is-open .chev{transform:rotate(180deg)}
.faq-item.is-open .chev svg{stroke:var(--primary)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .25s ease}
.faq-a__inner{padding:0 24px 22px 24px;font-size:15px;color:var(--text-2);position:relative}
.faq-item.is-open .faq-a__inner::before{content:"";position:absolute;left:8px;top:4px;bottom:24px;width:3px;background:var(--primary);border-radius:2px}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;overflow:hidden;border-radius:20px;border:1px solid var(--line-accent);
  padding:60px 56px;background:var(--bg-2);
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background:url('/assets/images/backpic/back-3.webp') center/cover no-repeat;opacity:.22;
}
.cta-band::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(120deg,rgba(11,15,16,.92),rgba(17,23,26,.75));
}
.cta-band__inner{position:relative;z-index:2;display:flex;align-items:center;justify-content:space-between;gap:44px;flex-wrap:wrap}
.cta-band h2{font-size:28px;margin-bottom:12px}
.cta-band p{max-width:560px;font-size:15.5px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}

/* ---------- 页脚 ---------- */
.site-footer{border-top:1px solid var(--line);background:var(--bg-1);padding:72px 0 28px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:44px}
.footer-brand{display:inline-flex;align-items:center;gap:12px;margin-bottom:18px}
.footer-col h4{font-size:15px;margin-bottom:18px;color:var(--text-1);letter-spacing:.5px}
.footer-col p{font-size:14px;color:var(--text-3);line-height:1.9;max-width:340px}
.footer-links{display:grid;gap:12px}
.footer-links a{font-size:14px;color:var(--text-2);transition:color .2s ease}
.footer-links a:hover{color:var(--primary)}
.footer-bottom{
  margin-top:56px;padding-top:24px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--text-3);letter-spacing:.4px;
}

/* ---------- 底部固定转化条 ---------- */
.sticky-bar{
  position:fixed;left:50%;bottom:22px;transform:translate(-50%,140%);
  z-index:70;display:flex;align-items:center;gap:20px;
  padding:14px 16px 14px 26px;border-radius:var(--radius-pill);
  background:rgba(17,23,26,.94);border:1px solid var(--line-accent);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  box-shadow:0 20px 40px -24px rgba(0,0,0,.9);
  transition:transform .35s ease;max-width:calc(100% - 32px);
}
.sticky-bar.is-visible{transform:translate(-50%,0)}
.sticky-bar p{margin:0;font-size:14px;color:var(--text-1);white-space:nowrap}
.sticky-bar .sticky-close{
  background:transparent;border:1px solid var(--line);border-radius:50%;width:30px;height:30px;
  display:flex;align-items:center;justify-content:center;cursor:pointer;flex-shrink:0;transition:border-color .2s ease;
}
.sticky-bar .sticky-close:hover{border-color:var(--line-accent)}
.sticky-bar .sticky-close svg{stroke:var(--text-3);stroke-width:1.5;fill:none;stroke-linecap:round}

/* ---------- 响应式 ---------- */
@media (max-width:1080px){
  .feature-card{grid-template-columns:1fr}
  .feature-card__media{min-height:280px}
  .feature-card__body{padding:44px 36px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:40px}
  .stat-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:1024px){
  h1{font-size:36px}
  h2{font-size:25px}
  .split{gap:44px}
}
@media (max-width:900px){
  .nav-desktop{
    position:fixed;left:0;right:0;top:72px;bottom:0;
    background:var(--bg-0);flex-direction:column;align-items:stretch;gap:0;
    padding:20px 24px 120px;transform:translateX(102%);transition:transform .3s ease;
    border-top:1px solid var(--line);overflow-y:auto;
  }
  .nav-desktop.is-open{transform:translateX(0)}
  .nav-link{font-size:20px;padding:20px 0;border-bottom:1px solid var(--line);width:100%}
  .nav-link::after{display:none}
  .nav-link.is-active{color:var(--primary)}
  .nav-link.is-active::before{top:28px;right:2px;width:6px;height:6px}
  .nav-toggle{display:inline-flex}
  .header-actions .btn--sm{display:none}
  .page-hero{padding:64px 0 56px}
  .hero-stats{gap:28px;margin-top:36px}
  .split{grid-template-columns:1fr;gap:28px}
  .split--reverse .split__media{order:1}
  .split--reverse .split__body{order:2}
  .split + .split{margin-top:64px}
  .quote-grid{grid-template-columns:1fr}
  .cta-band{padding:44px 28px}
  .sticky-bar{left:16px;right:16px;transform:translateY(140%);max-width:none;border-radius:20px;flex-wrap:wrap}
  .sticky-bar.is-visible{transform:translateY(0)}
  .sticky-bar p{white-space:normal;flex:1 1 auto}
  .sticky-bar .btn{flex:1 1 100%}
}
@media (max-width:768px){
  .section{padding:64px 0}
  .section--tight{padding:52px 0}
  h1{font-size:30px}
  h2{font-size:23px}
  h3{font-size:17px}
  body{font-size:15.5px}
  .container{padding:0 16px}
  .header-inner{height:64px}
  .nav-desktop{top:64px}
  .brand__text{font-size:15px}
  .feature-card__body{padding:34px 24px}
  .cta-band__inner{flex-direction:column;align-items:flex-start}
  .footer-grid{grid-template-columns:1fr;gap:34px}
  .footer-col p{max-width:none}
  .timeline{padding-left:24px}
}
@media (max-width:520px){
  .hero-actions{flex-direction:column;align-items:stretch}
  .hero-actions .btn{width:100%}
  .hero-stats{flex-direction:column;gap:18px}
  .stat-grid{grid-template-columns:1fr}
  .node-grid{grid-template-columns:1fr}
  .brand__text{max-width:150px;overflow:hidden;text-overflow:ellipsis}
}