/* roulang page: index */
:root{
  --bg-deep:#0A1018;
  --bg-soft:#101A2B;
  --cyan:#2ED3B7;
  --blue:#4C7DFF;
  --amber:#FFB86B;
  --text:#E6EDF5;
  --text-2:#97A6BC;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --glass:rgba(255,255,255,.045);
  --glass-2:rgba(255,255,255,.07);
  --radius:16px;
  --sidebar:232px;
  --sec-gap:96px;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:
    radial-gradient(1100px 680px at 82% -12%, rgba(46,211,183,.12), transparent 62%),
    radial-gradient(900px 620px at 6% 8%, rgba(76,125,255,.12), transparent 60%),
    linear-gradient(165deg, #0A1018 0%, #101A2B 100%);
  background-attachment:fixed;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  background-image:
    repeating-linear-gradient(0deg, rgba(255,255,255,.035) 0 1px, transparent 1px 64px),
    repeating-linear-gradient(90deg, rgba(255,255,255,.035) 0 1px, transparent 1px 64px);
  z-index:0;
}
body::after{
  content:"";
  position:fixed;
  top:-160px;
  right:-200px;
  width:760px;
  height:420px;
  transform:rotate(-18deg);
  background:linear-gradient(120deg, rgba(46,211,183,.16), rgba(76,125,255,.08) 55%, transparent 80%);
  filter:blur(20px);
  pointer-events:none;
  z-index:0;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer;background:none;border:0;padding:0}
:focus-visible{outline:2px solid var(--cyan);outline-offset:2px;border-radius:6px}
::selection{background:rgba(46,211,183,.32);color:#fff}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:rgba(255,255,255,.03)}
::-webkit-scrollbar-thumb{background:rgba(46,211,183,.32);border-radius:8px;border:2px solid transparent;background-clip:content-box}
::-webkit-scrollbar-thumb:hover{background:rgba(46,211,183,.55);background-clip:content-box}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px;position:relative;z-index:2}

/* ---------- 左侧导航 ---------- */
.side-nav{
  position:fixed;
  top:0;left:0;bottom:0;
  width:var(--sidebar);
  display:flex;
  flex-direction:column;
  gap:24px;
  padding:26px 18px 22px;
  background:rgba(10,16,24,.72);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  backdrop-filter:blur(16px) saturate(140%);
  border-right:1px solid rgba(255,255,255,.07);
  z-index:40;
}
.brand{display:flex;align-items:center;gap:10px}
.brand-mark{
  flex:0 0 auto;
  width:38px;height:38px;
  display:flex;align-items:center;justify-content:center;
  font-size:17px;font-weight:700;color:#05131A;
  background:linear-gradient(135deg,#2ED3B7,#4C7DFF);
  border-radius:22px 6px 22px 6px;
  box-shadow:0 0 22px rgba(46,211,183,.35);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;min-width:0}
.brand-text strong{font-size:14px;font-weight:700;letter-spacing:-.01em;color:#fff}
.brand-text em{font-style:normal;font-size:11px;color:var(--text-2);letter-spacing:.04em}
.side-links{display:flex;flex-direction:column;gap:4px;flex:1 1 auto;overflow-y:auto}
.side-link{
  position:relative;
  display:flex;align-items:center;gap:8px;
  padding:11px 12px 11px 14px;
  font-size:13.5px;
  color:var(--text-2);
  border-radius:10px;
  transition:color .2s ease, background .2s ease;
}
.side-link::before{
  content:"";
  position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:3px;height:0;
  border-radius:3px;
  background:linear-gradient(180deg,#2ED3B7,#4C7DFF);
  box-shadow:0 0 10px rgba(46,211,183,.75);
  transition:height .22s ease-out;
}
.side-link:hover{color:#fff;background:rgba(255,255,255,.05)}
.side-link.is-active{
  color:#fff;
  background:linear-gradient(90deg, rgba(46,211,183,.16), rgba(46,211,183,0) 82%);
}
.side-link.is-active::before{height:20px}
.side-card{
  border:1px solid var(--line);
  background:var(--glass);
  border-radius:16px;
  padding:14px;
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
}
.side-card-title{font-size:13px;font-weight:600;color:#fff}
.side-card-text{font-size:12px;color:var(--text-2);margin-top:4px}
.side-card-btn{
  display:inline-flex;align-items:center;justify-content:center;
  margin-top:10px;width:100%;
  min-height:36px;
  font-size:13px;font-weight:600;color:#05131A;
  background:linear-gradient(135deg,#2ED3B7,#4C7DFF);
  border-radius:10px;
  transition:filter .2s ease, transform .2s ease;
}
.side-card-btn:hover{filter:brightness(1.07);transform:translateY(-1px)}
.side-card-btn:active{transform:scale(.98)}

/* ---------- 移动端导航 ---------- */
.mobile-topbar{
  display:none;
  position:sticky;top:0;z-index:50;
  height:64px;
  align-items:center;justify-content:space-between;
  gap:12px;
  padding:0 16px;
  background:rgba(10,16,24,.86);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  backdrop-filter:blur(16px) saturate(140%);
  border-bottom:1px solid rgba(255,255,255,.07);
}
.mobile-brand{display:flex;align-items:center;gap:9px;min-width:0}
.mobile-brand strong{
  font-size:14px;font-weight:700;color:#fff;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.burger{
  flex:0 0 auto;
  width:44px;height:44px;
  display:flex;align-items:center;justify-content:center;
  border:1px solid var(--line);
  border-radius:12px;
  background:rgba(255,255,255,.05);
  transition:border-color .2s ease, background .2s ease;
}
.burger:hover{border-color:rgba(46,211,183,.6);background:rgba(46,211,183,.12)}
.burger span{display:block;width:18px;height:2px;border-radius:2px;background:#E6EDF5;position:relative}
.burger span::before,.burger span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;border-radius:2px;background:#E6EDF5;
}
.burger span::before{top:-6px}
.burger span::after{top:6px}
.drawer{
  position:fixed;inset:0;z-index:60;
  display:flex;flex-direction:column;
  padding:22px 20px 30px;
  background:rgba(8,13,20,.94);
  -webkit-backdrop-filter:blur(18px);
  backdrop-filter:blur(18px);
  opacity:0;visibility:hidden;transform:translateY(-12px);
  transition:opacity .28s ease-out, transform .28s ease-out, visibility .28s;
}
.drawer.open{opacity:1;visibility:visible;transform:translateY(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-bottom:18px;border-bottom:1px solid var(--line)}
.drawer-close{
  width:44px;height:44px;display:flex;align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:12px;background:rgba(255,255,255,.05);font-size:18px;
}
.drawer-close:hover{border-color:rgba(46,211,183,.6)}
.drawer-list{display:flex;flex-direction:column;gap:6px;margin-top:20px}
.drawer-list a{
  display:block;padding:15px 14px;font-size:15px;color:var(--text-2);
  border-radius:12px;border:1px solid transparent;
  transition:color .2s ease, background .2s ease, border-color .2s ease;
}
.drawer-list a:hover,.drawer-list a.is-active{color:#fff;background:rgba(46,211,183,.1);border-color:rgba(46,211,183,.28)}
.drawer-foot{margin-top:auto;font-size:12px;color:var(--text-2)}

/* ---------- 主区域 ---------- */
.site-main{margin-left:var(--sidebar);padding-top:8px;position:relative;z-index:2}
.section{padding:var(--sec-gap) 0}
.section-tight{padding:64px 0}

/* ---------- 通用组件 ---------- */
.glass{
  position:relative;
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--radius);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  transition:transform .22s ease-out, border-color .22s ease-out, box-shadow .22s ease-out;
}
.glass::before{
  content:"";
  position:absolute;top:0;left:12px;right:12px;height:1px;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.3),transparent);
  pointer-events:none;
}
.glass-hover:hover{
  transform:translateY(-4px);
  border-color:var(--line-strong);
  box-shadow:0 18px 40px rgba(0,0,0,.45);
}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;
  font-size:12px;line-height:1.6;
  border-radius:22px 6px 22px 6px;
  border:1px solid rgba(46,211,183,.3);
  background:rgba(46,211,183,.1);
  color:#8FF0DF;
  white-space:nowrap;
}
.badge-blue{border-color:rgba(76,125,255,.3);background:rgba(76,125,255,.1);color:#AFC4FF}
.badge-amber{border-color:rgba(255,184,107,.3);background:rgba(255,184,107,.1);color:#FFD2A0}
.tag{
  display:inline-flex;align-items:center;
  padding:3px 10px;font-size:12px;color:var(--text-2);
  border:1px solid var(--line);border-radius:8px;background:rgba(255,255,255,.03);
}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:48px;padding:0 24px;
  font-size:15px;font-weight:600;
  border-radius:12px;
  transition:transform .2s ease-out, box-shadow .22s ease-out, border-color .2s ease-out, filter .2s ease-out, background .2s ease-out;
}
.btn-primary{
  color:#05131A;
  background:linear-gradient(135deg,#2ED3B7,#4C7DFF);
  box-shadow:0 0 24px rgba(46,211,183,.35);
}
.btn-primary:hover{box-shadow:0 0 32px rgba(46,211,183,.55);filter:brightness(1.06);transform:translateY(-2px)}
.btn-primary:active{transform:scale(.98)}
.btn-ghost{
  color:var(--text);
  background:rgba(255,255,255,.05);
  border:1px solid var(--line);
}
.btn-ghost:hover{border-color:rgba(46,211,183,.6);color:#fff;background:rgba(46,211,183,.08)}
.btn-ghost:active{transform:scale(.98)}
.btn-block{width:100%}
.text-link{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:600;color:var(--cyan);
  border-bottom:2px solid rgba(46,211,183,.35);
  padding-bottom:2px;
  transition:border-color .2s ease, color .2s ease;
}
.text-link span{transition:transform .2s ease-out}
.text-link:hover{border-color:var(--cyan);color:#8FF0DF}
.text-link:hover span{transform:translateX(4px)}

/* ---------- 区块标题 ---------- */
.sec-head{margin-bottom:28px;max-width:760px}
.sec-head .sec-label{display:flex;align-items:center;gap:10px;margin-bottom:12px}
.sec-line{width:3px;height:18px;border-radius:3px;background:linear-gradient(180deg,#2ED3B7,#4C7DFF);box-shadow:0 0 10px rgba(46,211,183,.6)}
.sec-num{
  font-size:12px;font-weight:700;letter-spacing:.12em;color:var(--amber);
  font-family:Inter,system-ui,sans-serif;
}
.sec-head h2{font-size:28px;line-height:1.35;letter-spacing:-.01em;color:#fff}
.sec-head p{margin-top:14px;color:var(--text-2);font-size:15px;line-height:1.8}

/* ---------- Hero ---------- */
.hero{padding:56px 0 76px;position:relative}
.hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:48px;align-items:center}
.hero-copy .badge{margin-bottom:20px}
.hero h1{
  font-size:42px;line-height:1.25;letter-spacing:-.01em;color:#fff;font-weight:800;
}
.hero h1 .hl{
  background:linear-gradient(135deg,#2ED3B7,#4C7DFF);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-sub{margin-top:20px;font-size:17px;color:var(--text-2);line-height:1.8;max-width:520px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.hero-note{margin-top:22px;font-size:13px;color:var(--text-2)}
.hero-visual{position:relative;border-radius:20px;overflow:hidden;border:1px solid var(--line)}
.hero-visual img{width:100%;height:440px;object-fit:cover;opacity:.82}
.hero-visual-mask{
  position:absolute;inset:0;
  background:linear-gradient(200deg, rgba(10,16,24,.28) 0%, rgba(10,16,24,.86) 78%);
}
.hero-panel{
  position:absolute;left:20px;right:20px;bottom:20px;
  padding:18px 20px;
}
.hero-panel-title{font-size:13px;font-weight:600;color:var(--amber);letter-spacing:.04em}
.hero-panel ul{margin-top:12px;display:flex;flex-direction:column;gap:9px}
.hero-panel li{display:flex;align-items:center;gap:10px;font-size:14px;color:#fff}
.p-dot{width:6px;height:6px;border-radius:50%;background:var(--cyan);box-shadow:0 0 10px rgba(46,211,183,.9);flex:0 0 auto}

/* ---------- 痛点 ---------- */
.pain-grid{
  display:grid;grid-template-columns:repeat(2,1fr);
  border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;
  background:rgba(255,255,255,.02);
}
.pain-item{
  padding:26px 26px 28px;
  border-right:1px solid var(--line);
  border-bottom:1px solid var(--line);
  transition:background .22s ease-out;
}
.pain-item:nth-child(2n){border-right:0}
.pain-item:nth-child(n+3){border-bottom:0}
.pain-item:hover{background:rgba(46,211,183,.05)}
.pain-num{
  font-family:Inter,system-ui,sans-serif;
  font-size:13px;font-weight:700;letter-spacing:.14em;color:var(--amber);
}
.pain-item h3{margin-top:10px;font-size:19px;color:#fff}
.pain-item p{margin-top:8px;font-size:14.5px;color:var(--text-2);line-height:1.75}

/* ---------- 解决方案 ---------- */
.solution-grid{display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:start}
.solution-copy p{color:var(--text-2);font-size:15.5px;line-height:1.9}
.solution-copy p + p{margin-top:16px}
.solution-figure{margin-top:28px;border-radius:14px;overflow:hidden;border:1px solid var(--line);position:relative}
.solution-figure img{width:100%;height:240px;object-fit:cover}
.solution-figure figcaption{
  position:absolute;left:0;right:0;bottom:0;
  padding:10px 14px;font-size:12.5px;color:var(--text-2);
  background:linear-gradient(180deg,transparent,rgba(10,16,24,.9));
}
.cap-list{display:flex;flex-direction:column;gap:14px}
.cap-item{
  display:flex;gap:16px;align-items:flex-start;
  padding:20px 22px;
}
.cap-icon{
  flex:0 0 auto;width:42px;height:42px;
  display:flex;align-items:center;justify-content:center;
  border-radius:12px;
  border:1px solid rgba(46,211,183,.28);
  background:rgba(46,211,183,.1);
  color:var(--cyan);
}
.cap-icon svg{width:20px;height:20px;stroke:currentColor;stroke-width:1.5;fill:none;stroke-linecap:round;stroke-linejoin:round}
.cap-item h3{font-size:18px;color:#fff}
.cap-item p{margin-top:6px;font-size:14.5px;color:var(--text-2);line-height:1.75}

/* ---------- 成果带 ---------- */
.band{
  position:relative;
  padding:78px 0;
  background:linear-gradient(180deg, rgba(46,211,183,.06), rgba(76,125,255,.05));
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.band-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.metric{padding:6px 4px}
.metric-num{
  font-family:Inter,system-ui,sans-serif;
  font-size:40px;font-weight:800;line-height:1;
  background:linear-gradient(135deg,#2ED3B7,#4C7DFF);
  -webkit-background-clip:text;background-clip:text;color:transparent;
  text-shadow:0 0 26px rgba(46,211,183,.35);
  animation:pulseGlow 4s ease-in-out infinite;
}
.metric h3{margin-top:16px;font-size:17px;color:#fff}
.metric p{margin-top:8px;font-size:13.5px;color:var(--text-2);line-height:1.75}

/* ---------- 资讯列表 ---------- */
.news-list{display:flex;flex-direction:column;gap:18px}
.news-item{display:grid;grid-template-columns:168px 1fr;gap:22px;align-items:start}
.news-time{
  padding-top:20px;
  font-size:13px;color:var(--amber);
  font-family:Inter,system-ui,sans-serif;
  display:flex;align-items:center;gap:10px;
}
.news-time::after{content:"";flex:1 1 auto;height:1px;background:linear-gradient(90deg,rgba(255,184,107,.5),transparent)}
.news-body{padding:22px 24px}
.news-body h3{margin-top:12px;font-size:19px;line-height:1.5;color:#fff}
.news-body h3 a{transition:color .2s ease}
.news-body h3 a:hover{color:var(--cyan)}
.news-summary{margin-top:10px;font-size:14.5px;color:var(--text-2);line-height:1.78}
.news-foot{margin-top:14px}
.empty-state{
  border:1px dashed rgba(255,255,255,.2);
  border-radius:16px;
  padding:46px 24px;
  text-align:center;
  background:rgba(255,255,255,.02);
}
.empty-state svg{width:36px;height:36px;margin:0 auto 14px;stroke:var(--text-2);stroke-width:1.5;fill:none;stroke-linecap:round;stroke-linejoin:round}
.empty-state p{font-size:14.5px;color:var(--text-2)}
.empty-state a{margin-top:14px;display:inline-flex}

/* ---------- 证言 ---------- */
.quote-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.quote{padding:26px 24px 22px}
.quote-mark{
  font-family:Georgia,serif;font-size:44px;line-height:1;color:rgba(46,211,183,.5);
}
.quote p{margin-top:6px;font-size:14.5px;color:var(--text);line-height:1.85}
.quote-person{margin-top:18px;padding-top:14px;border-top:1px solid var(--line);display:flex;align-items:center;gap:10px}
.quote-avatar{
  width:34px;height:34px;border-radius:22px 6px 22px 6px;
  display:flex;align-items:center;justify-content:center;
  font-size:13px;font-weight:700;color:#05131A;
  background:linear-gradient(135deg,#2ED3B7,#4C7DFF);
}
.quote-person span{font-size:13px;color:var(--text-2)}

/* ---------- FAQ ---------- */
.faq-list{display:flex;flex-direction:column;gap:12px}
.faq-item{overflow:hidden}
.faq-q{
  width:100%;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 24px;
  text-align:left;
  font-size:16px;font-weight:600;color:#fff;
}
.faq-q:hover{color:var(--cyan)}
.faq-arrow{
  flex:0 0 auto;width:22px;height:22px;
  display:flex;align-items:center;justify-content:center;
  color:var(--cyan);
  transition:transform .28s ease-out;
}
.faq-arrow svg{width:18px;height:18px;stroke:currentColor;stroke-width:1.8;fill:none;stroke-linecap:round;stroke-linejoin:round}
.faq-item.open .faq-arrow{transform:rotate(180deg)}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height .32s ease-out;
}
.faq-a p{padding:0 24px 22px;font-size:14.5px;color:var(--text-2);line-height:1.85;border-top:1px solid var(--line);padding-top:16px}

/* ---------- 表单 ---------- */
.contact-grid{display:grid;grid-template-columns:.92fr 1.08fr;gap:48px;align-items:start}
.contact-points{margin-top:22px;display:flex;flex-direction:column;gap:12px}
.contact-points li{display:flex;gap:10px;font-size:14.5px;color:var(--text-2)}
.contact-points .p-dot{margin-top:11px}
.contact-form{padding:28px 26px}
.field{display:flex;flex-direction:column;gap:8px;margin-bottom:16px}
.field label{font-size:14px;color:var(--text-2)}
.field input,.field select,.field textarea{
  width:100%;
  background:rgba(255,255,255,.04);
  border:1px solid var(--line);
  border-radius:12px;
  padding:12px 14px;
  font-size:14.5px;
  color:var(--text);
  transition:border-color .2s ease, box-shadow .2s ease;
}
.field textarea{resize:vertical;min-height:110px;line-height:1.75}
.field input::placeholder,.field textarea::placeholder{color:rgba(151,166,188,.7)}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;
  border-color:rgba(46,211,183,.7);
  box-shadow:0 0 0 2px rgba(46,211,183,.35);
}
.field select option{background:#101A2B;color:#E6EDF5}
.form-tip{margin-top:12px;font-size:13px;color:var(--cyan);min-height:20px}

/* ---------- 结尾 CTA ---------- */
.cta-band{padding:0 0 var(--sec-gap)}
.cta-inner{
  display:flex;align-items:center;justify-content:space-between;gap:28px;
  padding:38px 40px;
  border-radius:20px;
  border:1px solid rgba(46,211,183,.28);
  background:linear-gradient(120deg, rgba(46,211,183,.16), rgba(76,125,255,.14) 60%, rgba(255,255,255,.04));
  box-shadow:0 0 44px rgba(46,211,183,.18);
  -webkit-backdrop-filter:blur(16px) saturate(150%);
  backdrop-filter:blur(16px) saturate(150%);
}
.cta-inner h2{font-size:26px;line-height:1.4;color:#fff}
.cta-inner p{margin-top:10px;font-size:14.5px;color:var(--text-2)}
.cta-actions{display:flex;flex-direction:column;align-items:flex-start;gap:14px;flex:0 0 auto}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-left:var(--sidebar);
  border-top:1px solid var(--line);
  background:rgba(8,13,20,.6);
  padding:56px 0 26px;
  position:relative;z-index:2;
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:34px}
.footer-brand p{margin-top:16px;font-size:14px;color:var(--text-2);line-height:1.8;max-width:340px}
.footer-tags{margin-top:16px;display:flex;flex-wrap:wrap;gap:8px}
.footer-col h4{font-size:14px;color:#fff;letter-spacing:.02em}
.footer-col ul{margin-top:16px;display:flex;flex-direction:column;gap:10px}
.footer-col a,.footer-col li{font-size:13.5px;color:var(--text-2);transition:color .2s ease}
.footer-col a:hover{color:var(--cyan)}
.footer-bottom{
  margin-top:40px;padding-top:20px;
  border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;
}
.footer-bottom p{font-size:12.5px;color:var(--text-2)}
.to-top{
  width:42px;height:42px;
  display:flex;align-items:center;justify-content:center;
  border-radius:12px;
  border:1px solid var(--line);
  background:rgba(255,255,255,.05);
  color:var(--cyan);
  font-size:16px;
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .26s ease-out, transform .26s ease-out, visibility .26s, border-color .2s ease;
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{border-color:rgba(46,211,183,.7);background:rgba(46,211,183,.12)}

/* ---------- 动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .45s ease-out, transform .45s ease-out}
.reveal.in{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (min-width:1024px) and (max-width:1279px){
  :root{--sidebar:208px}
  .hero h1{font-size:38px}
  .hero-visual img{height:400px}
}
@media (max-width:1023px){
  :root{--sec-gap:64px}
  .side-nav{display:none}
  .mobile-topbar{display:flex}
  .site-main{margin-left:0;padding-top:0}
  .site-footer{margin-left:0}
  .hero{padding:40px 0 56px}
  .hero-grid{grid-template-columns:1fr;gap:34px}
  .hero h1{font-size:34px}
  .hero-visual img{height:320px}
  .hero-panel{position:relative;left:0;right:0;bottom:0;margin:-1px 0 0;border-radius:0 0 20px 20px}
  .solution-grid,.contact-grid{grid-template-columns:1fr;gap:34px}
  .quote-grid{grid-template-columns:1fr}
  .band-grid{grid-template-columns:repeat(2,1fr);gap:30px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
  .cta-inner{flex-direction:column;align-items:flex-start;padding:32px 26px}
  .cta-actions{width:100%}
}
@media (max-width:767px){
  :root{--sec-gap:56px}
  .container{padding:0 20px}
  .hero h1{font-size:28px}
  .hero-sub{font-size:15.5px}
  .sec-head h2{font-size:23px}
  .pain-grid{grid-template-columns:1fr}
  .pain-item{border-right:0}
  .pain-item:nth-child(n+3){border-bottom:1px solid var(--line)}
  .pain-item:last-child{border-bottom:0}
  .news-item{grid-template-columns:1fr;gap:10px}
  .news-time{padding-top:0}
  .news-time::after{display:none}
  .band-grid{grid-template-columns:1fr;gap:26px}
  .cta-inner h2{font-size:22px}
}
@media (max-width:520px){
  body{font-size:15px}
  .container{padding:0 16px}
  .hero h1{font-size:25px}
  .hero-actions .btn{width:100%}
  .metric-num{font-size:34px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .contact-form{padding:22px 18px}
  .faq-q{padding:17px 18px;font-size:15px}
  .faq-a p{padding:14px 18px 20px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none !important;transition:none !important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* roulang page: article */
:root{
  --bg-0:#0A1018;
  --bg-1:#101A2B;
  --cyan:#2ED3B7;
  --blue:#4C7DFF;
  --amber:#FFB86B;
  --text:#E6EDF5;
  --muted:#97A6BC;
  --line:rgba(255,255,255,.08);
  --line-2:rgba(255,255,255,.16);
  --glass:rgba(255,255,255,.045);
  --glass-2:rgba(255,255,255,.07);
  --r:16px;
  --r-sm:12px;
  --shadow:0 18px 40px rgba(0,0,0,.45);
  --sidebar-w:232px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:system-ui,-apple-system,"PingFang SC","Microsoft YaHei","Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--bg-0);
  min-height:100vh;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color .2s ease,border-color .2s ease,background .2s ease;}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit;}
h1,h2,h3,h4{margin:0;letter-spacing:-.01em;line-height:1.3;font-weight:700;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--cyan);outline-offset:2px;border-radius:6px;}
::selection{background:rgba(46,211,183,.3);}
::-webkit-scrollbar{width:10px;height:10px;}
::-webkit-scrollbar-track{background:#0A1018;}
::-webkit-scrollbar-thumb{background:rgba(255,255,255,.14);border-radius:8px;border:2px solid #0A1018;}
::-webkit-scrollbar-thumb:hover{background:rgba(46,211,183,.45);}

/* 背景层 */
.bg-layer{
  position:fixed;inset:0;z-index:-1;pointer-events:none;
  background:
    radial-gradient(1200px 620px at 78% -8%, rgba(76,125,255,.16), transparent 62%),
    radial-gradient(900px 520px at 8% 4%, rgba(46,211,183,.10), transparent 65%),
    linear-gradient(180deg,#0A1018 0%,#0C1420 46%,#101A2B 100%);
}
.bg-layer::before{
  content:"";position:absolute;inset:0;
  background-image:
    repeating-linear-gradient(to right, rgba(255,255,255,.045) 0 1px, transparent 1px 84px),
    repeating-linear-gradient(to bottom, rgba(255,255,255,.045) 0 1px, transparent 1px 84px);
  opacity:.6;
}
.bg-layer::after{
  content:"";position:absolute;top:-140px;right:-120px;width:640px;height:420px;
  background:linear-gradient(135deg, rgba(46,211,183,.16), rgba(76,125,255,.05) 55%, transparent 78%);
  transform:rotate(-14deg);filter:blur(46px);
}

/* 布局 */
.layout{display:flex;min-height:100vh;}
.main{flex:1;min-width:0;margin-left:var(--sidebar-w);display:flex;flex-direction:column;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}

/* 侧栏导航 */
.sidebar{
  position:fixed;top:0;left:0;bottom:0;width:var(--sidebar-w);z-index:60;
  display:flex;flex-direction:column;gap:16px;padding:24px 18px 20px;
  background:rgba(10,16,24,.72);
  backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  border-right:1px solid rgba(255,255,255,.07);
}
.brand{display:flex;align-items:center;gap:10px;}
.brand-mark{
  flex:0 0 auto;width:38px;height:38px;display:grid;place-items:center;
  border-radius:22px 6px 22px 6px;
  background:linear-gradient(135deg,#2ED3B7,#4C7DFF);
  color:#06121A;font-weight:800;font-size:17px;
  box-shadow:0 0 22px rgba(46,211,183,.3);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;min-width:0;}
.brand-text strong{font-size:14px;letter-spacing:-.01em;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.brand-text em{font-style:normal;font-size:11px;color:var(--muted);letter-spacing:.04em;}
.side-sep{height:1px;background:var(--line);margin:2px 0;}
.side-links{display:flex;flex-direction:column;gap:4px;flex:1;overflow-y:auto;}
.side-link{
  position:relative;display:block;padding:11px 12px 11px 14px;border-radius:10px;
  font-size:14.5px;color:var(--muted);line-height:1.5;
  transition:color .2s ease,background .2s ease,padding .2s ease;
}
.side-link::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%) scaleY(0);
  width:3px;height:22px;border-radius:3px;background:var(--cyan);
  box-shadow:0 0 12px rgba(46,211,183,.75);
  transition:transform .22s ease;
}
.side-link:hover{color:var(--text);background:rgba(255,255,255,.05);}
.side-link.is-active{
  color:#fff;background:linear-gradient(90deg,rgba(46,211,183,.16),rgba(46,211,183,0) 82%);
  font-weight:600;
}
.side-link.is-active::before{transform:translateY(-50%) scaleY(1);}
.side-card{
  border-radius:14px;padding:12px 12px 13px;
  background:var(--glass);border:1px solid var(--line);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.08);
  backdrop-filter:blur(12px);
}
.side-card b{display:block;font-size:13px;color:var(--cyan);margin-bottom:4px;font-weight:600;}
.side-card span{font-size:12px;color:var(--muted);line-height:1.6;display:block;}

/* 移动导航 */
.mobile-bar{
  display:none;position:sticky;top:0;z-index:70;height:64px;
  align-items:center;justify-content:space-between;padding:0 16px;
  background:rgba(10,16,24,.86);
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line);
}
.mobile-bar .brand-text strong{font-size:13.5px;}
.hamburger{
  width:44px;height:44px;display:grid;place-items:center;border-radius:12px;
  border:1px solid var(--line);background:var(--glass);
}
.hamburger:hover{border-color:rgba(46,211,183,.6);}
.drawer{
  position:fixed;inset:0;z-index:90;display:none;
  background:rgba(6,11,18,.9);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  padding:20px;
}
.drawer.is-open{display:block;}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px;}
.drawer-close{
  width:44px;height:44px;border-radius:12px;border:1px solid var(--line);
  background:var(--glass);display:grid;place-items:center;font-size:18px;
}
.drawer nav{display:flex;flex-direction:column;gap:8px;}
.drawer nav a{
  padding:15px 14px;border-radius:12px;font-size:16px;color:var(--muted);
  border:1px solid transparent;
}
.drawer nav a:hover,.drawer nav a.is-active{
  color:#fff;background:rgba(255,255,255,.05);border-color:var(--line);
}

/* 面包屑 */
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--muted);padding:26px 0 0;}
.crumbs a:hover{color:var(--cyan);}
.crumbs span.dot{opacity:.5;}
.crumbs .cur{color:var(--text);max-width:19em;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}

/* 文章头 */
.article-head{padding:22px 0 6px;position:relative;}
.article-head .kicker{
  display:inline-flex;align-items:center;gap:8px;font-size:12px;letter-spacing:.08em;
  color:var(--amber);border:1px solid rgba(255,184,107,.3);
  background:rgba(255,184,107,.08);
  border-radius:22px 6px 22px 6px;padding:5px 12px;margin-bottom:16px;
}
.article-head h1{
  font-size:38px;line-height:1.28;max-width:960px;
}
.meta-row{
  display:flex;flex-wrap:wrap;align-items:center;gap:14px;
  margin-top:18px;font-size:13.5px;color:var(--muted);
}
.meta-row .sep{width:1px;height:14px;background:var(--line-2);}
.badge{
  display:inline-block;font-size:12px;padding:3px 11px;border-radius:22px 6px 22px 6px;
  border:1px solid rgba(46,211,183,.3);background:rgba(46,211,183,.1);color:var(--cyan);
}
.badge.sand{border-color:rgba(255,184,107,.3);background:rgba(255,184,107,.1);color:var(--amber);}
.badge.blue{border-color:rgba(76,125,255,.3);background:rgba(76,125,255,.1);color:#9DB6FF;}

/* 正文区布局 */
.article-wrap{
  display:grid;grid-template-columns:minmax(0,1fr);
  gap:36px;padding:34px 0 0;align-items:start;
}
.article-main{min-width:0;max-width:830px;}
.cover-frame{
  border-radius:var(--r);overflow:hidden;border:1px solid var(--line);
  box-shadow:var(--shadow);margin-bottom:28px;position:relative;
}
.cover-frame img{width:100%;height:300px;object-fit:cover;}
.cover-frame::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(10,16,24,.12),rgba(10,16,24,.62));
}

/* 正文排版 */
.prose{font-size:16.5px;line-height:1.9;color:#DCE5F0;}
.prose > * + *{margin-top:1.25em;}
.prose p{margin-bottom:1.25em;}
.prose h2{
  font-size:27px;margin:2em 0 .7em;padding-left:14px;position:relative;color:#fff;
}
.prose h2::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:3px;border-radius:3px;
  background:linear-gradient(180deg,var(--cyan),rgba(46,211,183,.2));
  box-shadow:0 0 12px rgba(46,211,183,.5);
}
.prose h3{font-size:20px;margin:1.7em 0 .6em;color:#fff;}
.prose a{color:var(--cyan);border-bottom:1px solid rgba(46,211,183,.4);}
.prose a:hover{color:#8CF0DC;border-color:#8CF0DC;}
.prose ul,.prose ol{margin:1.1em 0 1.35em;padding-left:6px;}
.prose ul li,.prose ol li{position:relative;padding-left:22px;margin-bottom:.6em;color:#CFDAE8;}
.prose ul li::before{
  content:"";position:absolute;left:4px;top:.72em;width:7px;height:7px;border-radius:2px;
  background:var(--cyan);box-shadow:0 0 8px rgba(46,211,183,.6);
}
.prose ol{counter-reset:li;}
.prose ol li{counter-increment:li;}
.prose ol li::before{
  content:counter(li);position:absolute;left:0;top:.1em;
  font-size:13px;font-weight:700;color:var(--amber);
}
.prose blockquote{
  margin:1.5em 0;padding:16px 20px;border-left:3px solid var(--cyan);
  background:rgba(255,255,255,.045);border-radius:0 12px 12px 0;color:#C7D4E4;
}
.prose blockquote p:last-child{margin-bottom:0;}
.prose img{border-radius:14px;margin:1.6em auto;border:1px solid var(--line);}
.prose figure{margin:1.6em 0;}
.prose figcaption{font-size:13px;color:var(--muted);text-align:center;margin-top:10px;}
.prose table{width:100%;border-collapse:collapse;margin:1.6em 0;font-size:14.5px;}
.prose th,.prose td{border-bottom:1px solid var(--line);padding:11px 12px;text-align:left;}
.prose th{background:rgba(255,255,255,.05);color:#fff;font-weight:600;}
.prose tr:hover td{background:rgba(255,255,255,.03);}
.prose code{
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:14px;
  background:rgba(46,211,183,.1);color:#9FEEDA;padding:2px 6px;border-radius:6px;
}
.prose pre{
  background:rgba(0,0,0,.35);border:1px solid var(--line);border-radius:12px;
  padding:16px 18px;overflow-x:auto;
}
.prose pre code{background:none;padding:0;color:#CFDAE8;}
.prose hr{border:none;height:1px;background:var(--line);margin:2em 0;}

/* 文末 */
.article-foot{
  margin-top:38px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:16px;justify-content:space-between;align-items:center;
}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;}
.tag{
  font-size:12px;padding:4px 11px;border-radius:22px 6px 22px 6px;
  border:1px solid var(--line);background:rgba(255,255,255,.045);color:var(--muted);
}
.share-row{display:flex;align-items:center;gap:10px;}
.share-row .mini{
  padding:8px 14px;font-size:13px;border-radius:10px;
  border:1px solid var(--line);background:var(--glass);color:var(--muted);
}
.share-row .mini:hover{color:var(--cyan);border-color:rgba(46,211,183,.55);}

/* 右侧栏 */
.article-aside{display:none;}
.aside-card{
  border-radius:var(--r);padding:18px;margin-bottom:18px;
  background:var(--glass);border:1px solid var(--line);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.08);
  backdrop-filter:blur(14px) saturate(140%);
}
.aside-card h4{font-size:14px;color:#fff;margin-bottom:12px;display:flex;align-items:center;gap:8px;}
.aside-card h4::before{content:"";width:3px;height:14px;border-radius:3px;background:var(--cyan);box-shadow:0 0 10px rgba(46,211,183,.6);}
.aside-card ul li{margin-bottom:2px;}
.aside-card ul a{font-size:13.5px;color:var(--muted);display:block;padding:7px 0 7px 12px;position:relative;}
.aside-card ul a::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:4px;height:4px;border-radius:50%;background:rgba(255,255,255,.28);
}
.aside-card ul a:hover{color:var(--cyan);}
.aside-card ul a:hover::before{background:var(--cyan);}
.aside-cta{
  border-radius:var(--r);padding:18px;
  background:linear-gradient(150deg,rgba(46,211,183,.14),rgba(76,125,255,.1));
  border:1px solid rgba(46,211,183,.24);
  box-shadow:0 0 30px rgba(46,211,183,.12);
}
.aside-cta p{font-size:13.5px;color:#C8D6E6;margin:8px 0 14px;line-height:1.7;}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:12px;font-size:15px;font-weight:600;
  transition:transform .18s ease,box-shadow .22s ease,filter .22s ease,border-color .22s ease,background .22s ease;
  white-space:nowrap;
}
.btn-primary{
  background:linear-gradient(135deg,#2ED3B7,#4C7DFF);color:#06121A;
  box-shadow:0 0 24px rgba(46,211,183,.35);
}
.btn-primary:hover{filter:brightness(1.06);box-shadow:0 0 32px rgba(46,211,183,.5);transform:translateY(-2px);}
.btn-primary:active{transform:scale(.98);}
.btn-ghost{
  background:var(--glass);border:1px solid var(--line);color:var(--text);
}
.btn-ghost:hover{border-color:rgba(46,211,183,.6);color:#fff;transform:translateY(-2px);}
.btn-ghost:active{transform:scale(.98);}
.btn-sm{height:40px;padding:0 18px;font-size:14px;border-radius:10px;}
.link-cat{
  display:inline-flex;align-items:center;gap:6px;color:var(--cyan);
  font-size:14px;font-weight:600;border-bottom:2px solid rgba(46,211,183,.35);
  padding-bottom:2px;
}
.link-cat:hover{border-color:var(--cyan);}
.link-cat svg{transition:transform .2s ease;}
.link-cat:hover svg{transform:translateX(4px);}

/* 空态 */
.empty-state{
  border:1px dashed rgba(255,255,255,.22);border-radius:var(--r);
  padding:48px 24px;text-align:center;background:rgba(255,255,255,.025);
}
.empty-icon{
  width:52px;height:52px;margin:0 auto 16px;border-radius:22px 6px 22px 6px;
  display:grid;place-items:center;font-size:22px;color:var(--amber);
  background:rgba(255,184,107,.1);border:1px solid rgba(255,184,107,.3);
}
.empty-state h2{font-size:22px;margin-bottom:10px;}
.empty-state p{color:var(--muted);font-size:15px;margin-bottom:22px;}

/* 通用板块 */
.section{padding:74px 0;}
.section-head{margin-bottom:34px;}
.section-head .no{
  font-size:12px;letter-spacing:.14em;color:var(--amber);display:block;margin-bottom:8px;
}
.section-head h2{
  font-size:28px;display:flex;align-items:center;gap:12px;
}
.section-head h2::before{
  content:"";width:4px;height:26px;border-radius:4px;
  background:linear-gradient(180deg,var(--cyan),rgba(46,211,183,.25));
  box-shadow:0 0 14px rgba(46,211,183,.55);
}
.section-head p.desc{color:var(--muted);font-size:15px;margin-top:12px;max-width:760px;}

/* 相关推荐 */
.rec-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;}
.rec-card{
  display:flex;flex-direction:column;gap:12px;padding:20px;border-radius:var(--r);
  background:var(--glass);border:1px solid var(--line);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.08);
  backdrop-filter:blur(14px) saturate(140%);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.rec-card:hover{transform:translateY(-4px);border-color:var(--line-2);box-shadow:var(--shadow);}
.rec-card h3{font-size:17px;line-height:1.5;}
.rec-card p{font-size:14px;line-height:1.75;color:var(--muted);}
.rec-meta{display:flex;align-items:center;gap:10px;font-size:12.5px;color:var(--muted);margin-top:auto;}
.rec-meta .dotline{width:4px;height:4px;border-radius:50%;background:rgba(255,255,255,.3);}

/* CTA 带 */
.cta-band{
  position:relative;overflow:hidden;border-radius:20px;padding:38px 34px;
  background:linear-gradient(120deg,rgba(46,211,183,.16),rgba(76,125,255,.12) 60%,rgba(255,255,255,.04));
  border:1px solid rgba(46,211,183,.26);
  box-shadow:0 0 44px rgba(46,211,183,.14),inset 0 1px 0 rgba(255,255,255,.14);
  display:flex;flex-wrap:wrap;gap:22px;align-items:center;justify-content:space-between;
}
.cta-band h3{font-size:24px;margin-bottom:8px;}
.cta-band p{color:#C9D7E6;font-size:15px;max-width:620px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center;}

/* 页脚 */
.site-footer{
  margin-top:auto;border-top:1px solid var(--line);
  background:rgba(8,13,20,.6);padding:54px 0 24px;
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px;}
.footer-brand p{font-size:14px;color:var(--muted);margin:14px 0 16px;max-width:340px;line-height:1.8;}
.footer-tags{display:flex;flex-wrap:wrap;gap:8px;}
.footer-col h4{font-size:14px;color:#fff;margin-bottom:16px;}
.footer-col ul li{margin-bottom:10px;}
.footer-col ul a,.footer-col ul span{font-size:14px;color:var(--muted);}
.footer-col ul a:hover{color:var(--cyan);}
.footer-bottom{
  margin-top:40px;padding-top:20px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:12px 22px;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--muted);
}
.to-top{
  width:40px;height:40px;border-radius:12px;border:1px solid var(--line);
  background:var(--glass);color:var(--muted);display:grid;place-items:center;font-size:16px;
  transition:color .2s ease,border-color .2s ease,transform .2s ease;
}
.to-top:hover{color:var(--cyan);border-color:rgba(46,211,183,.55);transform:translateY(-3px);}

/* 入场动效 */
.reveal{opacity:0;transform:translateY(12px);}
.reveal.in{opacity:1;transform:translateY(0);transition:opacity .42s ease-out,transform .42s ease-out;}

@media (prefers-reduced-motion: reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important;}
  .reveal{opacity:1;transform:none;}
}

/* 响应式 */
@media (min-width:1280px){
  .article-wrap{grid-template-columns:minmax(0,1fr) 264px;}
  .article-aside{display:block;position:sticky;top:28px;}
}
@media (max-width:1279px){
  :root{--sidebar-w:208px;}
  .article-head h1{font-size:34px;}
}
@media (max-width:1023px){
  .sidebar{display:none;}
  .main{margin-left:0;}
  .mobile-bar{display:flex;}
  .article-head h1{font-size:30px;}
  .cover-frame img{height:240px;}
  .rec-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .section{padding:60px 0;}
}
@media (max-width:767px){
  .container{padding:0 18px;}
  .article-head h1{font-size:26px;}
  .meta-row{gap:10px;font-size:13px;}
  .prose{font-size:15.5px;}
  .prose h2{font-size:22px;}
  .prose h3{font-size:18px;}
  .rec-grid{grid-template-columns:minmax(0,1fr);}
  .cta-band{padding:28px 22px;}
  .cta-band h3{font-size:20px;}
  .section{padding:52px 0;}
  .section-head h2{font-size:23px;}
}
@media (max-width:520px){
  .cover-frame img{height:190px;}
  .btn{width:100%;}
  .cta-actions{width:100%;flex-direction:column;align-items:stretch;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .article-foot{flex-direction:column;align-items:flex-start;}
}

/* roulang page: category1 */
:root{
  --bg-0:#0A1018;
  --bg-1:#101A2B;
  --cyan:#2ED3B7;
  --blue:#4C7DFF;
  --amber:#FFB86B;
  --text:#E6EDF5;
  --muted:#97A6BC;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --card:rgba(255,255,255,.045);
  --sidebar-w:232px;
  --radius:16px;
  --radius-sm:12px;
  --shadow-card:0 18px 40px rgba(0,0,0,.45);
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  padding:0;
  min-height:100%;
  background:
    radial-gradient(120% 90% at 78% -10%, rgba(46,211,183,.12) 0%, rgba(16,26,43,0) 55%),
    radial-gradient(100% 80% at 10% 0%, rgba(76,125,255,.10) 0%, rgba(10,16,24,0) 60%),
    linear-gradient(180deg,#0A1018 0%,#101A2B 55%,#0A1018 100%);
  background-color:var(--bg-0);
  color:var(--text);
  font-family:system-ui,-apple-system,"PingFang SC","Microsoft YaHei","Inter",sans-serif;
  font-size:16px;
  line-height:1.85;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:
    repeating-linear-gradient(0deg, rgba(255,255,255,.035) 0px, rgba(255,255,255,.035) 1px, transparent 1px, transparent 56px),
    repeating-linear-gradient(90deg, rgba(255,255,255,.035) 0px, rgba(255,255,255,.035) 1px, transparent 1px, transparent 56px);
  mask-image:radial-gradient(120% 100% at 60% 0%, #000 20%, transparent 85%);
  -webkit-mask-image:radial-gradient(120% 100% at 60% 0%, #000 20%, transparent 85%);
}
body::after{
  content:"";
  position:fixed;
  top:-18%;
  right:-12%;
  width:52vw;
  height:52vw;
  max-width:760px;
  max-height:760px;
  pointer-events:none;
  z-index:0;
  transform:rotate(-18deg);
  background:linear-gradient(120deg, rgba(76,125,255,.16) 0%, rgba(46,211,183,.10) 45%, rgba(46,211,183,0) 75%);
  filter:blur(48px);
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button,input,textarea,select{font:inherit;color:inherit;}
h1,h2,h3,h4{margin:0;letter-spacing:-.01em;font-weight:650;line-height:1.3;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
::selection{background:rgba(46,211,183,.3);color:#fff;}
::-webkit-scrollbar{width:10px;height:10px;}
::-webkit-scrollbar-track{background:rgba(255,255,255,.03);}
::-webkit-scrollbar-thumb{background:rgba(151,166,188,.35);border-radius:99px;border:2px solid transparent;background-clip:content-box;}
::-webkit-scrollbar-thumb:hover{background:rgba(46,211,183,.5);background-clip:content-box;}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px;}

/* ---------- 布局主干 ---------- */
.page-shell{position:relative;z-index:1;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}

/* ---------- 左侧竖向导航 ---------- */
.side-nav{
  position:fixed;
  top:0;left:0;bottom:0;
  width:var(--sidebar-w);
  display:flex;
  flex-direction:column;
  justify-content:space-between;
  gap:24px;
  padding:26px 18px 22px;
  background:rgba(10,16,24,.72);
  backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  border-right:1px solid rgba(255,255,255,.07);
  z-index:60;
}
.brand{display:flex;align-items:center;gap:10px;}
.brand-mark{
  width:38px;height:38px;
  display:grid;place-items:center;
  border-radius:12px 4px 12px 4px;
  background:linear-gradient(135deg,var(--cyan),var(--blue));
  color:#04141a;
  font-weight:800;
  font-size:18px;
  box-shadow:0 0 20px rgba(46,211,183,.35);
  flex:0 0 auto;
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;min-width:0;}
.brand-text strong{font-size:14px;font-weight:700;letter-spacing:-.01em;color:var(--text);}
.brand-text em{font-style:normal;font-size:11.5px;color:var(--muted);letter-spacing:.04em;}
.side-links{display:flex;flex-direction:column;gap:6px;margin-top:6px;}
.side-link{
  position:relative;
  display:block;
  padding:11px 14px 11px 16px;
  font-size:14.5px;
  color:var(--muted);
  border-radius:10px;
  transition:color .22s var(--ease),background .22s var(--ease),transform .22s var(--ease);
}
.side-link::before{
  content:"";
  position:absolute;
  left:2px;top:50%;
  transform:translateY(-50%) scaleY(.2);
  width:3px;height:22px;
  border-radius:99px;
  background:var(--cyan);
  box-shadow:0 0 12px rgba(46,211,183,.8);
  opacity:0;
  transition:opacity .22s var(--ease),transform .22s var(--ease);
}
.side-link:hover{color:var(--text);background:rgba(255,255,255,.05);}
.side-link.is-active{
  color:#fff;
  background:linear-gradient(90deg,rgba(46,211,183,.16),rgba(46,211,183,0));
}
.side-link.is-active::before{opacity:1;transform:translateY(-50%) scaleY(1);}
.side-note{
  border-radius:14px;
  padding:14px;
  background:var(--card);
  border:1px solid var(--line);
  border-top-color:rgba(255,255,255,.16);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
}
.side-note p{font-size:13px;color:var(--text);line-height:1.6;}
.side-note span{display:block;margin-top:6px;font-size:12px;color:var(--muted);}

/* ---------- 移动端顶部导航 ---------- */
.mobile-bar{
  display:none;
  position:sticky;
  top:0;
  z-index:70;
  height:64px;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:0 16px;
  background:rgba(10,16,24,.86);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line);
}
.burger{
  width:44px;height:44px;
  display:grid;place-items:center;
  border-radius:12px;
  background:rgba(255,255,255,.05);
  border:1px solid var(--line);
  cursor:pointer;
  transition:border-color .22s var(--ease),background .22s var(--ease);
}
.burger:hover{border-color:rgba(46,211,183,.5);background:rgba(46,211,183,.08);}
.burger span{display:block;width:20px;height:1.6px;background:var(--text);border-radius:2px;position:relative;}
.burger span::before,.burger span::after{content:"";position:absolute;left:0;width:20px;height:1.6px;background:var(--text);border-radius:2px;}
.burger span::before{top:-6px;}
.burger span::after{top:6px;}
.drawer{
  position:fixed;
  inset:0;
  z-index:90;
  display:none;
  background:rgba(6,10,18,.92);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  padding:22px 20px 32px;
  overflow-y:auto;
}
.drawer.is-open{display:block;}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:26px;}
.drawer-close{
  width:44px;height:44px;
  display:grid;place-items:center;
  border-radius:12px;
  background:rgba(255,255,255,.05);
  border:1px solid var(--line);
  cursor:pointer;
  font-size:20px;
  line-height:1;
}
.drawer-link{
  display:block;
  padding:18px 6px;
  font-size:17px;
  color:var(--muted);
  border-bottom:1px solid var(--line);
  transition:color .2s var(--ease),padding-left .2s var(--ease);
}
.drawer-link:hover,.drawer-link.is-active{color:#fff;padding-left:14px;}
.drawer-link.is-active{border-left:3px solid var(--cyan);}

/* ---------- 主内容 ---------- */
.main-content{padding-left:var(--sidebar-w);min-height:100vh;}
.section{padding:96px 0;position:relative;}
.section--tight{padding:72px 0;}
.section-head{display:flex;flex-direction:column;gap:14px;margin-bottom:40px;max-width:760px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:12.5px;letter-spacing:.08em;color:var(--muted);text-transform:uppercase;
}
.eyebrow::before{content:"";width:3px;height:16px;border-radius:2px;background:var(--cyan);box-shadow:0 0 10px rgba(46,211,183,.7);}
.eyebrow i{font-style:normal;color:var(--amber);font-weight:700;letter-spacing:.06em;}
.section-title{font-size:28px;color:#fff;}
.section-sub{font-size:15.5px;color:var(--muted);line-height:1.8;}

/* ---------- Hero ---------- */
.cat-hero{
  position:relative;
  min-height:300px;
  display:flex;
  align-items:flex-end;
  overflow:hidden;
  border-bottom:1px solid var(--line);
}
.cat-hero__bg{
  position:absolute;inset:0;
  background-image:linear-gradient(105deg,rgba(10,16,24,.94) 0%,rgba(10,16,24,.78) 45%,rgba(16,26,43,.55) 100%),url('/assets/images/backpic/back-1.webp');
  background-size:cover;
  background-position:center right;
  transform:scale(1.02);
}
.cat-hero__inner{position:relative;z-index:2;width:100%;padding:76px 0 44px;}
.cat-hero h1{font-size:40px;color:#fff;margin-top:14px;}
.cat-hero__lead{margin-top:16px;font-size:16px;color:var(--muted);max-width:520px;line-height:1.8;}
.hero-flag{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 14px;
  font-size:12.5px;
  color:var(--cyan);
  background:rgba(46,211,183,.10);
  border:1px solid rgba(46,211,183,.3);
  border-radius:22px 6px 22px 6px;
}
.hero-flag b{color:#fff;font-weight:600;}

/* ---------- 面包屑 ---------- */
.crumb{padding:20px 0 0;font-size:13px;color:var(--muted);display:flex;flex-wrap:wrap;align-items:center;gap:8px;}
.crumb a{color:var(--muted);transition:color .2s var(--ease);}
.crumb a:hover{color:var(--cyan);}
.crumb span.sep{opacity:.5;}
.crumb .current{color:var(--text);}

/* ---------- 文本与卡片 ---------- */
.prose-block{max-width:820px;font-size:16px;color:#cfdae8;line-height:1.85;}
.prose-block p+p{margin-top:18px;}
.prose-block strong{color:#fff;font-weight:650;}
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;}
.card{
  position:relative;
  padding:26px 24px;
  border-radius:var(--radius);
  background:var(--card);
  border:1px solid var(--line);
  border-top-color:rgba(255,255,255,.16);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--shadow-card);}
.card__num{
  font-size:13px;font-weight:700;color:var(--amber);letter-spacing:.1em;
}
.card__icon{
  width:40px;height:40px;border-radius:12px 4px 12px 4px;
  display:grid;place-items:center;
  background:rgba(46,211,183,.12);
  border:1px solid rgba(46,211,183,.3);
  color:var(--cyan);
  margin-bottom:16px;
}
.card h3{font-size:19px;color:#fff;margin-bottom:10px;}
.card p{font-size:14.5px;color:var(--muted);line-height:1.75;}

/* ---------- 图文区 ---------- */
.split{display:grid;grid-template-columns:1.05fr 1fr;gap:48px;align-items:center;}
.figure{
  position:relative;
  border-radius:var(--radius);
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:0 22px 50px rgba(0,0,0,.45);
}
.figure img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease);}
.figure:hover img{transform:scale(1.03);}
.figure figcaption{
  position:absolute;left:0;right:0;bottom:0;
  padding:14px 18px;
  font-size:12.5px;
  color:#cfdae8;
  background:linear-gradient(0deg,rgba(6,10,18,.92),rgba(6,10,18,0));
}
.check-list{display:flex;flex-direction:column;gap:16px;margin-top:26px;}
.check-list li{display:flex;gap:12px;align-items:flex-start;font-size:15px;color:#cfdae8;line-height:1.7;}
.check-list li::before{
  content:"";flex:0 0 auto;margin-top:9px;
  width:8px;height:8px;border-radius:2px;
  background:var(--cyan);
  box-shadow:0 0 10px rgba(46,211,183,.6);
}

/* ---------- 步骤流程 ---------- */
.steps{position:relative;margin-top:8px;padding-left:26px;}
.steps::before{
  content:"";position:absolute;left:9px;top:14px;bottom:14px;width:1px;
  background:linear-gradient(180deg,rgba(46,211,183,.7),rgba(46,211,183,.05));
}
.step{position:relative;padding:0 0 30px 26px;}
.step:last-child{padding-bottom:0;}
.step::before{
  content:"";position:absolute;left:-26px;top:8px;
  width:18px;height:18px;border-radius:50%;
  background:rgba(10,16,24,.95);
  border:1px solid rgba(46,211,183,.6);
  box-shadow:0 0 14px rgba(46,211,183,.35);
}
.step b{display:block;font-size:12.5px;letter-spacing:.12em;color:var(--amber);}
.step h3{font-size:19px;color:#fff;margin:6px 0 8px;}
.step p{font-size:14.5px;color:var(--muted);line-height:1.75;max-width:640px;}

/* ---------- 带状数据条 ---------- */
.band{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));
  gap:1px;
  background:var(--line);
  border:1px solid var(--line);
  border-radius:var(--radius);
  overflow:hidden;
  margin-top:34px;
}
.band > div{
  background:rgba(10,16,24,.6);
  padding:22px 20px;
}
.band strong{display:block;font-size:26px;color:var(--cyan);text-shadow:0 0 18px rgba(46,211,183,.45);}
.band span{display:block;margin-top:6px;font-size:13px;color:var(--muted);line-height:1.6;}

/* ---------- 内链出口列表 ---------- */
.link-list{border-top:1px solid var(--line);}
.link-row{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 6px;
  border-bottom:1px solid var(--line);
  transition:background .22s var(--ease),padding-left .22s var(--ease);
}
.link-row:hover{background:rgba(255,255,255,.03);padding-left:14px;}
.link-row__t{display:flex;flex-direction:column;gap:6px;}
.link-row__t b{font-size:17px;color:#fff;font-weight:600;}
.link-row__t span{font-size:13.5px;color:var(--muted);}
.link-row__go{color:var(--cyan);font-size:14px;white-space:nowrap;display:inline-flex;gap:6px;align-items:center;transition:transform .22s var(--ease);}
.link-row:hover .link-row__go{transform:translateX(4px);}

/* ---------- 徽章 / 标签 ---------- */
.tag{
  display:inline-block;
  font-size:12px;
  padding:4px 11px;
  border-radius:22px 6px 22px 6px;
  color:var(--cyan);
  background:rgba(46,211,183,.10);
  border:1px solid rgba(46,211,183,.3);
}
.tag--info{color:var(--blue);background:rgba(76,125,255,.10);border-color:rgba(76,125,255,.3);}
.tag--time{color:var(--amber);background:rgba(255,184,107,.10);border-color:rgba(255,184,107,.3);}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;
  border-radius:var(--radius-sm);
  font-size:15px;font-weight:600;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform .2s var(--ease),box-shadow .22s var(--ease),filter .22s var(--ease),border-color .22s var(--ease),background .22s var(--ease);
}
.btn-primary{
  color:#04141a;
  background:linear-gradient(135deg,var(--cyan) 0%,var(--blue) 100%);
  box-shadow:0 0 24px rgba(46,211,183,.35);
}
.btn-primary:hover{box-shadow:0 0 32px rgba(46,211,183,.55);filter:brightness(1.06);}
.btn-primary:active{transform:scale(.98);}
.btn-ghost{
  color:var(--text);
  background:rgba(255,255,255,.045);
  border-color:var(--line);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
}
.btn-ghost:hover{border-color:rgba(46,211,183,.6);color:#fff;}
.btn-ghost:active{transform:scale(.98);}
.link-cta{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14.5px;color:var(--cyan);
  border-bottom:1px solid rgba(46,211,183,.5);
  padding-bottom:2px;
  transition:border-color .2s var(--ease),transform .2s var(--ease);
}
.link-cta:hover{border-color:var(--cyan);transform:translateX(3px);}

/* ---------- CTA 带 ---------- */
.cta-band{
  position:relative;
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
  padding:34px 32px;
  border-radius:var(--radius);
  background:linear-gradient(120deg,rgba(46,211,183,.14),rgba(76,125,255,.10) 60%,rgba(255,255,255,.03));
  border:1px solid rgba(255,255,255,.14);
  border-top-color:rgba(255,255,255,.28);
  backdrop-filter:blur(16px) saturate(150%);
  -webkit-backdrop-filter:blur(16px) saturate(150%);
  box-shadow:0 0 42px rgba(46,211,183,.18);
}
.cta-band h3{font-size:22px;color:#fff;}
.cta-band p{margin-top:8px;font-size:14.5px;color:#cfdae8;max-width:520px;}
.cta-actions{display:flex;align-items:center;gap:18px;flex-wrap:wrap;}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-left:var(--sidebar-w);
  border-top:1px solid var(--line);
  background:rgba(8,12,20,.6);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  padding:64px 0 28px;
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px;}
.footer-brand p{margin-top:16px;font-size:14px;color:var(--muted);line-height:1.8;max-width:340px;}
.footer-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px;}
.footer-col h4{font-size:14px;color:#fff;margin-bottom:16px;letter-spacing:.02em;}
.footer-col ul{display:flex;flex-direction:column;gap:11px;}
.footer-col a,.footer-col span{font-size:14px;color:var(--muted);transition:color .2s var(--ease);}
.footer-col a:hover{color:var(--cyan);}
.footer-bottom{
  margin-top:44px;padding-top:22px;
  border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;
}
.footer-bottom p{font-size:13px;color:var(--muted);}
.to-top{
  width:42px;height:42px;border-radius:12px;
  display:grid;place-items:center;
  background:rgba(255,255,255,.05);
  border:1px solid var(--line);
  color:var(--text);
  cursor:pointer;
  transition:border-color .2s var(--ease),transform .2s var(--ease),color .2s var(--ease);
}
.to-top:hover{border-color:rgba(46,211,183,.6);color:var(--cyan);transform:translateY(-2px);}

/* ---------- 入场动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);}
.reveal.is-in{
  opacity:1;transform:none;
  transition:opacity .45s var(--ease),transform .45s var(--ease);
}
@media (prefers-reduced-motion: reduce){
  .reveal{opacity:1;transform:none;}
  .reveal.is-in{transition:none;}
  html{scroll-behavior:auto;}
  .btn-primary{box-shadow:none;}
}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  :root{--sidebar-w:208px;}
  .cat-hero h1{font-size:36px;}
}
@media (max-width:1023px){
  .side-nav{display:none;}
  .mobile-bar{display:flex;}
  .main-content{padding-left:0;}
  .site-footer{margin-left:0;}
  .section{padding:64px 0;}
  .grid-3{grid-template-columns:repeat(2,minmax(0,1fr));}
  .split{grid-template-columns:1fr;gap:32px;}
  .band{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px;}
}
@media (max-width:767px){
  .container{padding:0 18px;}
  .section{padding:52px 0;}
  .section-title{font-size:23px;}
  .cat-hero{min-height:280px;}
  .cat-hero__inner{padding:60px 0 34px;}
  .cat-hero h1{font-size:30px;}
  .grid-3,.grid-2{grid-template-columns:1fr;}
  .cta-band{padding:26px 22px;}
  .footer-grid{grid-template-columns:1fr;}
  .link-row{flex-direction:column;align-items:flex-start;gap:10px;}
}
@media (max-width:520px){
  body{font-size:15px;}
  .cat-hero__bg{background-image:linear-gradient(160deg,rgba(10,16,24,.95) 0%,rgba(10,16,24,.82) 100%),url('/assets/images/backpic/back-1.webp');}
  .btn{width:100%;}
  .cta-actions{width:100%;flex-direction:column;align-items:stretch;}
  .cta-actions .link-cta{justify-content:center;}
  .band{grid-template-columns:1fr;}
}

/* roulang page: category2 */
:root{
    --bg-0:#0A1018;
    --bg-1:#101A2B;
    --mint:#2ED3B7;
    --blue:#4C7DFF;
    --amber:#FFB86B;
    --text:#E6EDF5;
    --muted:#97A6BC;
    --line:rgba(255,255,255,.08);
    --line-strong:rgba(255,255,255,.16);
    --glass:rgba(255,255,255,.045);
    --glass-2:rgba(255,255,255,.07);
    --radius:16px;
    --side-w:232px;
    --section-gap:96px;
    --ease:cubic-bezier(.22,.7,.28,1);
  }

  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
  body{
    margin:0;
    font-family:system-ui,-apple-system,"PingFang SC","Microsoft YaHei","Segoe UI",sans-serif;
    font-size:16px;
    line-height:1.85;
    color:var(--text);
    background:
      radial-gradient(1200px 620px at 82% -10%, rgba(46,211,183,.10), transparent 60%),
      radial-gradient(900px 520px at 8% 8%, rgba(76,125,255,.10), transparent 62%),
      linear-gradient(180deg, var(--bg-0) 0%, var(--bg-1) 58%, #0B1420 100%);
    background-attachment:fixed;
    min-height:100vh;
    overflow-x:hidden;
  }
  body::before{
    content:"";
    position:fixed;
    inset:0;
    pointer-events:none;
    background-image:
      repeating-linear-gradient(0deg, rgba(255,255,255,.035) 0 1px, transparent 1px 46px),
      repeating-linear-gradient(90deg, rgba(255,255,255,.035) 0 1px, transparent 1px 46px);
    mask-image:radial-gradient(circle at 70% 12%, #000 0%, transparent 78%);
    z-index:0;
  }
  body::after{
    content:"";
    position:fixed;
    top:-160px;
    right:-120px;
    width:620px;
    height:420px;
    background:linear-gradient(135deg, rgba(46,211,183,.20), rgba(76,125,255,.06) 58%, transparent 76%);
    transform:rotate(-14deg);
    filter:blur(28px);
    pointer-events:none;
    z-index:0;
  }
  img{max-width:100%;display:block;border-radius:14px}
  a{color:inherit;text-decoration:none;transition:color .22s var(--ease),border-color .22s var(--ease)}
  a:hover{color:var(--mint)}
  button{font:inherit;color:inherit;background:none;border:none;cursor:pointer}
  ul,ol{margin:0;padding:0;list-style:none}
  h1,h2,h3,h4{margin:0;letter-spacing:-.01em;line-height:1.25;font-weight:700}
  p{margin:0}
  :focus-visible{outline:2px solid var(--mint);outline-offset:2px;border-radius:6px}
  ::selection{background:rgba(46,211,183,.3);color:#fff}

  ::-webkit-scrollbar{width:10px;height:10px}
  ::-webkit-scrollbar-track{background:rgba(255,255,255,.03)}
  ::-webkit-scrollbar-thumb{background:rgba(151,166,188,.28);border-radius:8px;border:2px solid transparent;background-clip:padding-box}
  ::-webkit-scrollbar-thumb:hover{background:rgba(46,211,183,.45);background-clip:padding-box}

  /* ---------- 布局 ---------- */
  .shell{position:relative;z-index:1}
  .container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
  .page-main{margin-left:var(--side-w);min-height:100vh;position:relative;z-index:1}
  .section{padding:var(--section-gap) 0}
  .section-tight{padding:64px 0}

  /* ---------- 侧栏导航 ---------- */
  .sidebar{
    position:fixed;
    top:0;left:0;bottom:0;
    width:var(--side-w);
    display:flex;
    flex-direction:column;
    gap:24px;
    padding:28px 20px 24px;
    background:rgba(10,16,24,.72);
    backdrop-filter:blur(16px) saturate(140%);
    -webkit-backdrop-filter:blur(16px) saturate(140%);
    border-right:1px solid rgba(255,255,255,.07);
    z-index:60;
  }
  .brand{display:flex;align-items:center;gap:12px}
  .brand-mark{
    width:42px;height:42px;flex:0 0 42px;
    display:grid;place-items:center;
    border-radius:14px 6px 14px 6px;
    background:linear-gradient(135deg, rgba(46,211,183,.9), rgba(76,125,255,.85));
    color:#04121A;font-weight:800;font-size:18px;
    box-shadow:0 0 24px rgba(46,211,183,.32);
  }
  .brand-text{display:flex;flex-direction:column;line-height:1.35}
  .brand-text strong{font-size:14px;font-weight:700;letter-spacing:-.01em}
  .brand-text em{font-style:normal;font-size:12px;color:var(--muted);letter-spacing:.02em}
  .side-links{display:flex;flex-direction:column;gap:6px;margin-top:6px}
  .side-link{
    position:relative;
    display:block;
    padding:11px 14px 11px 16px;
    border-radius:12px;
    font-size:14.5px;
    color:var(--muted);
    border:1px solid transparent;
    transition:all .22s var(--ease);
  }
  .side-link::before{
    content:"";
    position:absolute;
    left:2px;top:50%;
    width:3px;height:0;
    transform:translateY(-50%);
    border-radius:3px;
    background:var(--mint);
    box-shadow:0 0 12px rgba(46,211,183,.9);
    transition:height .24s var(--ease);
  }
  .side-link:hover{
    color:var(--text);
    background:linear-gradient(90deg, rgba(255,255,255,.06), rgba(255,255,255,0));
    border-color:var(--line);
  }
  .side-link.is-active{
    color:#fff;
    background:linear-gradient(90deg, rgba(46,211,183,.16), rgba(46,211,183,0));
    border-color:rgba(46,211,183,.28);
  }
  .side-link.is-active::before{height:20px}
  .side-card{
    margin-top:auto;
    padding:16px;
    border-radius:var(--radius);
    background:var(--glass);
    border:1px solid var(--line);
    backdrop-filter:blur(14px) saturate(140%);
    -webkit-backdrop-filter:blur(14px) saturate(140%);
    box-shadow:inset 0 1px 0 rgba(255,255,255,.16);
  }
  .side-card p{font-size:13px;color:var(--muted);line-height:1.7}
  .side-card strong{display:block;font-size:14px;margin-bottom:6px;color:var(--text)}
  .side-card a{
    display:inline-block;margin-top:10px;font-size:13px;color:var(--mint);
    border-bottom:1px solid rgba(46,211,183,.45);padding-bottom:2px;
  }

  /* ---------- 移动端顶部导航 ---------- */
  .mobile-bar{display:none}
  .drawer{display:none}

  /* ---------- Hero ---------- */
  .page-hero{
    position:relative;
    min-height:300px;
    display:flex;
    align-items:flex-end;
    overflow:hidden;
    border-bottom:1px solid var(--line);
  }
  .page-hero-bg{
    position:absolute;inset:0;
    background-image:url('/assets/images/backpic/back-2.png');
    background-size:cover;
    background-position:center right;
    opacity:.42;
  }
  .page-hero-mask{
    position:absolute;inset:0;
    background:
      linear-gradient(95deg, rgba(10,16,24,.96) 6%, rgba(10,16,24,.66) 48%, rgba(10,16,24,.34) 100%),
      radial-gradient(700px 320px at 88% 0%, rgba(46,211,183,.20), transparent 70%);
  }
  .page-hero-inner{position:relative;z-index:2;padding:74px 0 40px;width:100%}
  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    font-size:12px;letter-spacing:.08em;color:var(--amber);
    padding:5px 12px;
    border-radius:22px 6px 22px 6px;
    border:1px solid rgba(255,184,107,.3);
    background:rgba(255,184,107,.10);
    text-transform:uppercase;
  }
  .page-hero h1{font-size:40px;margin:16px 0 12px;max-width:760px}
  .page-hero .lede{font-size:15.5px;color:var(--muted);max-width:640px}

  /* ---------- 面包屑 ---------- */
  .crumb{
    display:flex;align-items:center;gap:10px;flex-wrap:wrap;
    padding:18px 0;
    font-size:13px;color:var(--muted);
    border-bottom:1px solid var(--line);
  }
  .crumb a{color:var(--muted)}
  .crumb a:hover{color:var(--mint)}
  .crumb .sep{color:rgba(151,166,188,.5)}
  .crumb .now{color:var(--text)}

  /* ---------- 区块标题 ---------- */
  .sec-head{display:flex;align-items:flex-start;gap:14px;margin-bottom:14px}
  .sec-bar{
    width:4px;height:26px;margin-top:6px;border-radius:3px;
    background:linear-gradient(180deg, var(--mint), rgba(46,211,183,.15));
    box-shadow:0 0 14px rgba(46,211,183,.55);
    flex:0 0 4px;
  }
  .sec-idx{font-size:13px;color:var(--amber);letter-spacing:.12em;font-weight:700;padding-top:8px}
  .sec-head h2{font-size:28px}
  .sec-sub{color:var(--muted);font-size:15px;max-width:760px;margin-bottom:40px}

  /* ---------- 交错图文 ---------- */
  .zig{display:flex;flex-direction:column;gap:56px}
  .zig-row{
    display:grid;
    grid-template-columns:1.02fr 1fr;
    gap:40px;
    align-items:center;
    padding:26px;
    border-radius:var(--radius);
    background:var(--glass);
    border:1px solid var(--line);
    backdrop-filter:blur(14px) saturate(140%);
    -webkit-backdrop-filter:blur(14px) saturate(140%);
    box-shadow:inset 0 1px 0 rgba(255,255,255,.16);
    transition:transform .22s var(--ease), border-color .22s var(--ease), box-shadow .22s var(--ease);
  }
  .zig-row:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:inset 0 1px 0 rgba(255,255,255,.2), 0 18px 40px rgba(0,0,0,.45)}
  .zig-row.reverse .zig-media{order:2}
  .zig-media{position:relative;overflow:hidden;border-radius:14px}
  .zig-media img{width:100%;height:290px;object-fit:cover;border-radius:14px;filter:saturate(1.03)}
  .zig-media::after{
    content:"";position:absolute;inset:0;border-radius:14px;
    background:linear-gradient(180deg, rgba(10,16,24,.06), rgba(10,16,24,.42));
    pointer-events:none;
  }
  .zig-body h3{font-size:21px;margin-bottom:12px}
  .zig-body p{color:var(--muted);font-size:15px}
  .zig-body p + p{margin-top:10px}
  .mini-list{margin-top:16px;display:flex;flex-direction:column;gap:8px}
  .mini-list li{position:relative;padding-left:18px;font-size:14px;color:#C9D6E6}
  .mini-list li::before{
    content:"";position:absolute;left:0;top:.72em;
    width:7px;height:7px;border-radius:2px;
    background:var(--mint);
    box-shadow:0 0 10px rgba(46,211,183,.6);
  }
  .badge{
    display:inline-block;
    font-size:12px;
    padding:3px 10px;
    border-radius:22px 6px 22px 6px;
    margin-bottom:12px;
  }
  .badge-mint{color:var(--mint);border:1px solid rgba(46,211,183,.3);background:rgba(46,211,183,.10)}
  .badge-blue{color:#9DB7FF;border:1px solid rgba(76,125,255,.3);background:rgba(76,125,255,.10)}
  .badge-sand{color:var(--amber);border:1px solid rgba(255,184,107,.3);background:rgba(255,184,107,.10)}

  /* ---------- 数据条 ---------- */
  .strip{
    display:grid;
    grid-template-columns:repeat(4,1fr);
    gap:1px;
    border-radius:var(--radius);
    overflow:hidden;
    border:1px solid var(--line);
    background:linear-gradient(180deg, rgba(16,26,43,.92), rgba(10,16,24,.92));
    box-shadow:inset 0 1px 0 rgba(255,255,255,.08);
  }
  .strip-item{
    padding:28px 24px;
    background:rgba(255,255,255,.012);
    border-right:1px solid var(--line);
    transition:background .22s var(--ease);
  }
  .strip-item:last-child{border-right:none}
  .strip-item:hover{background:rgba(46,211,183,.055)}
  .strip-item .k{
    font-size:12px;letter-spacing:.1em;color:var(--amber);text-transform:uppercase;
    display:block;margin-bottom:10px;
  }
  .strip-item .v{
    font-size:26px;font-weight:800;letter-spacing:-.01em;
    color:#fff;
    text-shadow:0 0 22px rgba(46,211,183,.45);
    display:block;
    margin-bottom:8px;
  }
  .strip-item p{font-size:13.5px;color:var(--muted);line-height:1.72}

  /* ---------- 说明列表 ---------- */
  .note-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
  .note-item{
    display:flex;gap:16px;align-items:flex-start;
    padding:22px;
    border-radius:var(--radius);
    background:var(--glass);
    border:1px solid var(--line);
    backdrop-filter:blur(14px) saturate(140%);
    -webkit-backdrop-filter:blur(14px) saturate(140%);
    box-shadow:inset 0 1px 0 rgba(255,255,255,.16);
    transition:transform .22s var(--ease), border-color .22s var(--ease), box-shadow .22s var(--ease);
  }
  .note-item:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:inset 0 1px 0 rgba(255,255,255,.2), 0 18px 40px rgba(0,0,0,.45)}
  .note-idx{
    flex:0 0 38px;width:38px;height:38px;
    display:grid;place-items:center;
    border-radius:12px 5px 12px 5px;
    font-size:13px;font-weight:800;color:#04121A;
    background:linear-gradient(135deg, var(--mint), var(--blue));
  }
  .note-item h4{font-size:17px;margin-bottom:8px}
  .note-item p{font-size:14px;color:var(--muted)}

  /* ---------- 按钮 ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:48px;padding:0 24px;
    border-radius:12px;
    font-size:15px;font-weight:600;
    transition:all .22s var(--ease);
  }
  .btn-primary{
    background:linear-gradient(135deg, var(--mint), var(--blue));
    color:#04121A;
    box-shadow:0 0 24px rgba(46,211,183,.35);
  }
  .btn-primary:hover{box-shadow:0 0 32px rgba(46,211,183,.55);filter:brightness(1.06);color:#04121A}
  .btn-primary:active{transform:scale(.98)}
  .btn-ghost{
    background:var(--glass);
    border:1px solid var(--line);
    color:var(--text);
    backdrop-filter:blur(12px);
    -webkit-backdrop-filter:blur(12px);
  }
  .btn-ghost:hover{border-color:rgba(46,211,183,.6);color:#fff}
  .btn-ghost:active{transform:scale(.98)}
  .link-cta{
    display:inline-flex;align-items:center;gap:6px;
    color:var(--mint);font-size:14.5px;font-weight:600;
    border-bottom:2px solid rgba(46,211,183,.4);
    padding-bottom:2px;
  }
  .link-cta span{transition:transform .22s var(--ease)}
  .link-cta:hover span{transform:translateX(4px)}

  /* ---------- FAQ ---------- */
  .faq{display:flex;flex-direction:column;gap:14px}
  .faq-item{
    border-radius:var(--radius);
    background:var(--glass);
    border:1px solid var(--line);
    backdrop-filter:blur(14px) saturate(140%);
    -webkit-backdrop-filter:blur(14px) saturate(140%);
    overflow:hidden;
    transition:border-color .22s var(--ease);
  }
  .faq-item:hover{border-color:var(--line-strong)}
  .faq-q{
    width:100%;
    display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:18px 22px;
    text-align:left;font-size:16px;font-weight:600;
  }
  .faq-q .arrow{
    flex:0 0 22px;width:22px;height:22px;display:grid;place-items:center;
    border-radius:8px;border:1px solid var(--line);color:var(--mint);
    transition:transform .28s var(--ease), background .22s var(--ease);
  }
  .faq-item.open .faq-q .arrow{transform:rotate(180deg);background:rgba(46,211,183,.14)}
  .faq-a{
    max-height:0;overflow:hidden;
    transition:max-height .32s var(--ease);
  }
  .faq-a p{padding:0 22px 20px;color:var(--muted);font-size:14.5px}

  /* ---------- CTA 带 ---------- */
  .cta-band{
    position:relative;
    display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
    padding:36px 40px;
    border-radius:20px;
    background:linear-gradient(120deg, rgba(46,211,183,.16), rgba(76,125,255,.10) 52%, rgba(255,255,255,.03));
    border:1px solid rgba(46,211,183,.3);
    box-shadow:0 0 46px rgba(46,211,183,.18), inset 0 1px 0 rgba(255,255,255,.2);
    overflow:hidden;
  }
  .cta-band::after{
    content:"";position:absolute;right:-60px;top:-70px;width:280px;height:220px;
    background:radial-gradient(circle, rgba(46,211,183,.35), transparent 68%);
    pointer-events:none;
  }
  .cta-band h2{font-size:26px;margin-bottom:10px}
  .cta-band p{color:var(--muted);font-size:15px;max-width:560px}
  .cta-actions{display:flex;align-items:center;gap:18px;flex-wrap:wrap;position:relative;z-index:2}

  /* ---------- 页脚 ---------- */
  .site-footer{
    margin-top:96px;
    border-top:1px solid var(--line);
    background:linear-gradient(180deg, rgba(255,255,255,.02), rgba(255,255,255,0));
  }
  .footer-grid{
    display:grid;
    grid-template-columns:1.5fr 1fr 1fr 1fr;
    gap:36px;
    padding:62px 0 40px;
  }
  .footer-brand p{color:var(--muted);font-size:14px;margin-top:16px;max-width:340px}
  .footer-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
  .tag{
    font-size:12px;padding:3px 10px;
    border-radius:22px 6px 22px 6px;
    color:var(--muted);
    border:1px solid var(--line);
    background:rgba(255,255,255,.03);
  }
  .footer-col h4{font-size:15px;margin-bottom:16px}
  .footer-col ul{display:flex;flex-direction:column;gap:11px}
  .footer-col li a,.footer-col li span{font-size:14px;color:var(--muted)}
  .footer-col li a:hover{color:var(--mint)}
  .footer-bottom{
    display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
    padding:22px 0 34px;
    border-top:1px solid var(--line);
  }
  .footer-bottom p{font-size:13px;color:rgba(151,166,188,.85)}
  .to-top{
    width:42px;height:42px;border-radius:12px;
    display:grid;place-items:center;
    background:var(--glass);border:1px solid var(--line);
    color:var(--mint);font-size:16px;
    transition:all .22s var(--ease);
  }
  .to-top:hover{border-color:rgba(46,211,183,.6);transform:translateY(-3px)}

  /* ---------- 入场动效 ---------- */
  .reveal{opacity:0;transform:translateY(12px);animation:riseIn .44s var(--ease) forwards}
  .d1{animation-delay:.06s}.d2{animation-delay:.12s}.d3{animation-delay:.18s}.d4{animation-delay:.24s}

  /* ---------- 响应式 ---------- */
  @media (max-width:1279px){
    :root{--side-w:208px}
    .page-hero h1{font-size:36px}
  }
  @media (max-width:1023px){
    :root{--section-gap:68px}
    .sidebar{display:none}
    .page-main{margin-left:0;padding-top:64px}
    .mobile-bar{
      display:flex;align-items:center;justify-content:space-between;gap:14px;
      position:fixed;top:0;left:0;right:0;height:64px;
      padding:0 18px;
      background:rgba(10,16,24,.86);
      backdrop-filter:blur(16px) saturate(140%);
      -webkit-backdrop-filter:blur(16px) saturate(140%);
      border-bottom:1px solid var(--line);
      z-index:80;
    }
    .mobile-bar .brand-text strong{font-size:13px}
    .hamburger{
      width:44px;height:44px;border-radius:12px;
      display:grid;place-items:center;
      background:var(--glass);border:1px solid var(--line);
    }
    .hamburger span{display:block;width:18px;height:2px;background:var(--text);border-radius:2px;position:relative}
    .hamburger span::before,.hamburger span::after{
      content:"";position:absolute;left:0;width:18px;height:2px;background:var(--text);border-radius:2px;
    }
    .hamburger span::before{top:-6px}
    .hamburger span::after{top:6px}
    .drawer{
      display:block;
      position:fixed;inset:64px 0 0 0;
      background:rgba(8,13,21,.94);
      backdrop-filter:blur(18px);
      -webkit-backdrop-filter:blur(18px);
      padding:26px 20px;
      transform:translateY(-12px);
      opacity:0;visibility:hidden;
      transition:all .26s var(--ease);
      z-index:70;
      overflow-y:auto;
    }
    .drawer.open{opacity:1;visibility:visible;transform:translateY(0)}
    .drawer .side-link{padding:16px 16px 16px 20px;font-size:16px}
    .drawer .side-link + .side-link{margin-top:8px}
    .drawer .drawer-close{
      margin-bottom:18px;
      display:inline-flex;align-items:center;gap:8px;
      font-size:13px;color:var(--muted);
      border:1px solid var(--line);border-radius:22px 6px 22px 6px;
      padding:6px 14px;
    }
    .page-hero{min-height:260px}
    .page-hero-inner{padding:56px 0 32px}
    .zig-row{grid-template-columns:1fr;gap:24px;padding:20px}
    .zig-row.reverse .zig-media{order:0}
    .zig-media img{height:230px}
    .note-grid{grid-template-columns:1fr}
    .strip{grid-template-columns:1fr 1fr}
    .strip-item{border-right:none;border-bottom:1px solid var(--line)}
    .strip-item:nth-child(odd){border-right:1px solid var(--line)}
    .strip-item:nth-last-child(-n+2){border-bottom:none}
    .footer-grid{grid-template-columns:1fr 1fr;gap:30px;padding:48px 0 32px}
  }
  @media (max-width:767px){
    :root{--section-gap:56px}
    .container{padding:0 18px}
    .page-hero h1{font-size:29px}
    .sec-head h2{font-size:23px}
    .cta-band{padding:26px 22px}
    .cta-band h2{font-size:22px}
    .cta-actions{width:100%}
    .cta-actions .btn{width:100%}
    .footer-grid{grid-template-columns:1fr}
    .footer-bottom{flex-direction:column;align-items:flex-start;gap:12px}
  }
  @media (max-width:519px){
    body{font-size:15px;line-height:1.78}
    body::after{display:none}
    .page-hero{min-height:230px}
    .strip{grid-template-columns:1fr}
    .strip-item{border-right:none !important}
    .zig-media img{height:190px}
    .btn{width:100%}
    .cta-actions{gap:12px}
    .footer-bottom .to-top{position:static}
  }
  @media (prefers-reduced-motion: reduce){
    *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important}
    .reveal{opacity:1;transform:none}
  }

/* roulang page: category3 */
:root{
    --bg-0:#0A1018;
    --bg-1:#101A2B;
    --cyan:#2ED3B7;
    --blue:#4C7DFF;
    --amber:#FFB86B;
    --text:#E6EDF5;
    --muted:#97A6BC;
    --line:rgba(255,255,255,.08);
    --line-strong:rgba(255,255,255,.16);
    --glass:rgba(255,255,255,.045);
    --glass-2:rgba(255,255,255,.07);
    --radius:16px;
    --radius-sm:12px;
    --sidebar:232px;
    --shadow-card:0 18px 40px rgba(0,0,0,.45);
    --shadow-glow:0 0 24px rgba(46,211,183,.35);
    --ease:220ms ease-out;
  }

  *,*::before,*::after{ box-sizing:border-box; }
  html{ -webkit-text-size-adjust:100%; scroll-behavior:smooth; }
  body{
    margin:0;
    min-height:100vh;
    font-family:system-ui,-apple-system,"PingFang SC","Microsoft YaHei",Inter,sans-serif;
    font-size:16px;
    line-height:1.85;
    letter-spacing:0;
    color:var(--text);
    background-color:var(--bg-0);
    background-image:
      radial-gradient(900px 620px at 88% -6%, rgba(76,125,255,.16), transparent 62%),
      radial-gradient(1100px 760px at 8% 0%, rgba(46,211,183,.10), transparent 60%),
      linear-gradient(180deg, var(--bg-1) 0%, var(--bg-0) 46%, #070C13 100%);
    background-attachment:fixed;
  }
  body::before{
    content:"";
    position:fixed;
    inset:0;
    pointer-events:none;
    z-index:0;
    background-image:
      repeating-linear-gradient(0deg, rgba(255,255,255,.035) 0 1px, transparent 1px 64px),
      repeating-linear-gradient(90deg, rgba(255,255,255,.035) 0 1px, transparent 1px 64px);
    mask-image:linear-gradient(180deg, rgba(0,0,0,.9), rgba(0,0,0,.25) 70%, transparent);
  }
  body::after{
    content:"";
    position:fixed;
    top:-160px;
    right:-180px;
    width:640px;
    height:440px;
    transform:rotate(-24deg);
    pointer-events:none;
    z-index:0;
    background:linear-gradient(120deg, rgba(46,211,183,.16), rgba(76,125,255,.10) 55%, transparent 78%);
    filter:blur(48px);
  }
  img{ max-width:100%; display:block; }
  a{ color:inherit; text-decoration:none; transition:color var(--ease), border-color var(--ease), background-color var(--ease); }
  a:hover{ color:var(--cyan); }
  button{ font:inherit; color:inherit; background:none; border:0; cursor:pointer; }
  h1,h2,h3,h4{ margin:0; letter-spacing:-.01em; line-height:1.25; font-weight:650; }
  p{ margin:0; }
  ul{ margin:0; padding:0; list-style:none; }
  :focus-visible{ outline:2px solid var(--cyan); outline-offset:3px; border-radius:6px; }

  .skip-link{
    position:absolute; left:-9999px; top:0; z-index:99;
    background:var(--bg-1); color:var(--text);
    padding:10px 16px; border-radius:0 0 12px 0; border:1px solid var(--line);
  }
  .skip-link:focus{ left:0; }

  .container{ width:100%; max-width:1200px; margin:0 auto; padding:0 24px; }

  /* ============ 左侧竖向导航 ============ */
  .sidebar{
    position:fixed;
    top:0; left:0; bottom:0;
    width:var(--sidebar);
    z-index:40;
    display:flex;
    flex-direction:column;
    gap:24px;
    padding:26px 18px 22px;
    background:rgba(10,16,24,.72);
    backdrop-filter:blur(16px) saturate(140%);
    -webkit-backdrop-filter:blur(16px) saturate(140%);
    border-right:1px solid rgba(255,255,255,.07);
    overflow-y:auto;
  }
  .brand{
    display:flex;
    align-items:center;
    gap:12px;
    min-width:0;
  }
  .brand-mark{
    flex:0 0 auto;
    width:40px; height:40px;
    display:grid; place-items:center;
    border-radius:12px;
    font-size:18px; font-weight:700;
    color:#04140F;
    background:linear-gradient(135deg, var(--cyan), var(--blue));
    box-shadow:0 0 22px rgba(46,211,183,.30);
  }
  .brand-text{ display:flex; flex-direction:column; min-width:0; }
  .brand-text strong{
    font-size:14px; font-weight:650; line-height:1.4;
    color:var(--text);
    letter-spacing:-.01em;
  }
  .brand-text em{
    font-style:normal; font-size:12px; color:var(--muted); letter-spacing:.02em;
  }
  .side-links{ display:flex; flex-direction:column; gap:6px; margin-top:6px; }
  .side-link{
    position:relative;
    display:block;
    padding:12px 14px 12px 16px;
    border-radius:12px;
    font-size:14.5px;
    color:var(--muted);
    border:1px solid transparent;
    transition:color var(--ease), background-color var(--ease), border-color var(--ease), transform var(--ease);
  }
  .side-link::before{
    content:"";
    position:absolute; left:0; top:50%; transform:translateY(-50%);
    width:3px; height:0;
    border-radius:3px;
    background:var(--cyan);
    box-shadow:0 0 12px rgba(46,211,183,.7);
    transition:height var(--ease);
  }
  .side-link:hover{
    color:var(--text);
    background:rgba(255,255,255,.05);
    border-color:var(--line);
  }
  .side-link:hover::before{ height:16px; }
  .side-link.is-active{
    color:#FFFFFF;
    background:linear-gradient(90deg, rgba(46,211,183,.16), rgba(46,211,183,0) 82%);
    border-color:rgba(46,211,183,.22);
  }
  .side-link.is-active::before{ height:22px; }

  .sidebar-card{
    margin-top:auto;
    padding:16px;
    border-radius:var(--radius);
    background:var(--glass);
    border:1px solid var(--line);
    box-shadow:inset 0 1px 0 rgba(255,255,255,.10);
  }
  .sidebar-card p{ font-size:13.5px; color:var(--muted); margin-bottom:8px; }
  .text-cta{
    display:inline-flex; align-items:center; gap:6px;
    font-size:13.5px; font-weight:600; color:var(--cyan);
    border-bottom:2px solid rgba(46,211,183,.4);
    padding-bottom:2px;
  }
  .text-cta span{ transition:transform var(--ease); }
  .text-cta:hover{ border-color:var(--cyan); }
  .text-cta:hover span{ transform:translateX(4px); }

  /* ============ 移动端导航 ============ */
  .mobile-bar{
    display:none;
    position:sticky; top:0; z-index:50;
    height:64px;
    align-items:center; justify-content:space-between;
    gap:12px;
    padding:0 16px;
    background:rgba(10,16,24,.86);
    backdrop-filter:blur(14px) saturate(140%);
    -webkit-backdrop-filter:blur(14px) saturate(140%);
    border-bottom:1px solid var(--line);
  }
  .mobile-bar .brand-text strong{ font-size:13px; }
  .mobile-bar .brand-text em{ font-size:11px; }
  .hamburger{
    width:44px; height:44px;
    display:grid; place-content:center; gap:5px;
    border-radius:12px;
    border:1px solid var(--line);
    background:var(--glass);
  }
  .hamburger span{
    display:block; width:20px; height:2px; border-radius:2px;
    background:var(--text);
    transition:transform var(--ease), opacity var(--ease);
  }
  .hamburger:hover{ border-color:rgba(46,211,183,.5); }
  .hamburger[aria-expanded="true"] span:nth-child(1){ transform:translateY(7px) rotate(45deg); }
  .hamburger[aria-expanded="true"] span:nth-child(2){ opacity:0; }
  .hamburger[aria-expanded="true"] span:nth-child(3){ transform:translateY(-7px) rotate(-45deg); }

  .drawer-mask{
    position:fixed; inset:0; z-index:48;
    background:rgba(4,8,14,.7);
    backdrop-filter:blur(3px);
  }
  .drawer{
    position:fixed; inset:64px 0 0 0; z-index:49;
    padding:22px 20px 40px;
    background:rgba(10,16,24,.96);
    backdrop-filter:blur(18px);
    -webkit-backdrop-filter:blur(18px);
    overflow-y:auto;
  }
  .drawer .side-link{ font-size:17px; padding:16px 16px 16px 18px; }
  .drawer-close{
    display:inline-flex; align-items:center; gap:8px;
    margin-bottom:16px; padding:9px 14px;
    font-size:13.5px; color:var(--muted);
    border:1px solid var(--line); border-radius:12px;
  }
  .drawer-close:hover{ color:var(--text); border-color:var(--line-strong); }

  /* ============ 主内容 ============ */
  .site-main{ position:relative; z-index:1; margin-left:var(--sidebar); }
  .section{ padding:88px 0; }
  .section-tight{ padding:64px 0; }

  .breadcrumb{
    display:flex; flex-wrap:wrap; align-items:center; gap:8px;
    font-size:13px; color:var(--muted);
    padding:20px 0 0;
  }
  .breadcrumb a:hover{ color:var(--cyan); }
  .breadcrumb .sep{ color:rgba(151,166,188,.55); }
  .breadcrumb .current{ color:var(--text); max-width:18ch; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }

  /* Hero */
  .hero{
    position:relative;
    overflow:hidden;
    border-bottom:1px solid var(--line);
    background-image:
      linear-gradient(100deg, rgba(7,12,19,.94) 6%, rgba(9,15,24,.80) 46%, rgba(9,15,24,.50) 100%),
      url('/assets/images/backpic/back-2.png');
    background-size:cover;
    background-position:center right;
  }
  .hero-inner{
    position:relative;
    z-index:2;
    min-height:296px;
    display:flex;
    flex-direction:column;
    justify-content:center;
    padding:56px 0 48px;
  }
  .eyebrow{
    display:inline-flex; align-items:center; gap:8px;
    font-size:12.5px; letter-spacing:.06em;
    color:var(--amber);
    margin-bottom:14px;
  }
  .eyebrow::before{
    content:""; width:22px; height:2px; border-radius:2px;
    background:linear-gradient(90deg, var(--cyan), transparent);
  }
  .hero h1{
    font-size:clamp(30px, 3.4vw, 42px);
    font-weight:680;
    max-width:22ch;
  }
  .hero-sub{
    margin-top:16px;
    font-size:16.5px;
    color:var(--muted);
    max-width:40ch;
  }
  .hero-badges{ display:flex; flex-wrap:wrap; gap:10px; margin-top:24px; }

  .badge{
    display:inline-flex; align-items:center; gap:6px;
    padding:5px 13px;
    font-size:12px; line-height:1.6;
    border-radius:22px 6px 22px 6px;
    border:1px solid rgba(46,211,183,.30);
    color:var(--cyan);
    background:rgba(46,211,183,.08);
    white-space:nowrap;
  }
  .badge--blue{ color:#9DB6FF; border-color:rgba(76,125,255,.30); background:rgba(76,125,255,.10); }
  .badge--sand{ color:var(--amber); border-color:rgba(255,184,107,.30); background:rgba(255,184,107,.10); }

  /* 板块标题 */
  .sec-head{ display:flex; align-items:flex-start; gap:14px; margin-bottom:26px; }
  .sec-head .bar{
    flex:0 0 auto;
    width:4px; height:26px;
    margin-top:5px;
    border-radius:3px;
    background:linear-gradient(180deg, var(--cyan), rgba(46,211,183,.15));
    box-shadow:0 0 14px rgba(46,211,183,.5);
  }
  .sec-head .num{
    font-size:12.5px; font-weight:700; letter-spacing:.10em;
    color:var(--amber);
    padding-top:6px;
  }
  .sec-head h2{ font-size:clamp(22px, 2.3vw, 29px); }
  .sec-head p{ margin-top:10px; font-size:15px; color:var(--muted); max-width:62ch; }

  /* 卡片 */
  .card{
    position:relative;
    padding:24px;
    border-radius:var(--radius);
    background:var(--glass);
    border:1px solid var(--line);
    box-shadow:inset 0 1px 0 rgba(255,255,255,.10);
    backdrop-filter:blur(14px) saturate(140%);
    -webkit-backdrop-filter:blur(14px) saturate(140%);
    transition:transform var(--ease), border-color var(--ease), box-shadow var(--ease), background-color var(--ease);
  }
  .card:hover{
    transform:translateY(-4px);
    border-color:var(--line-strong);
    box-shadow:var(--shadow-card), inset 0 1px 0 rgba(255,255,255,.14);
    background:var(--glass-2);
  }
  .card h3{ font-size:19px; margin-bottom:10px; }
  .card p{ font-size:14.5px; line-height:1.75; color:var(--muted); }

  /* 按钮 */
  .btn{
    display:inline-flex; align-items:center; justify-content:center; gap:8px;
    height:48px; padding:0 24px;
    border-radius:var(--radius-sm);
    font-size:15px; font-weight:600;
    transition:transform var(--ease), box-shadow var(--ease), filter var(--ease), border-color var(--ease), background-color var(--ease), color var(--ease);
  }
  .btn-primary{
    color:#04140F;
    background:linear-gradient(135deg, var(--cyan), var(--blue));
    box-shadow:var(--shadow-glow);
  }
  .btn-primary:hover{ filter:brightness(1.06); box-shadow:0 0 32px rgba(46,211,183,.5); color:#04140F; }
  .btn-primary:active{ transform:scale(.98); }
  .btn-ghost{
    color:var(--text);
    background:var(--glass);
    border:1px solid var(--line);
    backdrop-filter:blur(12px);
  }
  .btn-ghost:hover{ border-color:rgba(46,211,183,.55); color:var(--text); }
  .btn-ghost:active{ transform:scale(.98); }
  .btn-row{ display:flex; flex-wrap:wrap; gap:14px; }

  /* 流程步骤 */
  .steps{ position:relative; max-width:880px; }
  .step{
    position:relative;
    padding:0 0 40px 76px;
  }
  .step:last-child{ padding-bottom:0; }
  .step::before{
    content:"";
    position:absolute; left:26px; top:58px; bottom:6px;
    width:1px;
    background:linear-gradient(180deg, rgba(46,211,183,.55), rgba(46,211,183,.06));
  }
  .step:last-child::before{ display:none; }
  .step-dot{
    position:absolute; left:0; top:0;
    width:54px; height:54px;
    display:grid; place-items:center;
    border-radius:14px;
    font-size:14px; font-weight:700; letter-spacing:.04em;
    color:var(--amber);
    background:rgba(255,184,107,.10);
    border:1px solid rgba(255,184,107,.32);
    box-shadow:inset 0 1px 0 rgba(255,255,255,.12);
  }
  .step-body{
    padding:22px 24px;
    border-radius:var(--radius);
    background:var(--glass);
    border:1px solid var(--line);
    box-shadow:inset 0 1px 0 rgba(255,255,255,.10);
    backdrop-filter:blur(14px) saturate(140%);
    -webkit-backdrop-filter:blur(14px) saturate(140%);
    transition:transform var(--ease), border-color var(--ease), box-shadow var(--ease);
  }
  .step-body:hover{
    transform:translateY(-4px);
    border-color:var(--line-strong);
    box-shadow:var(--shadow-card), inset 0 1px 0 rgba(255,255,255,.14);
  }
  .step-body h3{ font-size:20px; margin-bottom:8px; }
  .step-body p{ font-size:14.8px; color:var(--muted); line-height:1.8; }
  .step-list{ margin-top:14px; display:grid; gap:8px; }
  .step-list li{
    position:relative;
    padding-left:20px;
    font-size:14px; color:var(--muted); line-height:1.75;
  }
  .step-list li::before{
    content:"";
    position:absolute; left:0; top:.72em;
    width:7px; height:7px;
    border-radius:2px;
    background:var(--cyan);
    box-shadow:0 0 10px rgba(46,211,183,.55);
  }

  /* 图文两栏 */
  .split{
    display:grid;
    grid-template-columns:1.05fr .95fr;
    gap:32px;
    align-items:center;
  }
  .figure{
    position:relative;
    border-radius:var(--radius);
    overflow:hidden;
    border:1px solid var(--line);
    box-shadow:var(--shadow-card);
  }
  .figure img{ width:100%; height:100%; min-height:260px; object-fit:cover; }
  .figure::after{
    content:"";
    position:absolute; inset:0;
    background:linear-gradient(180deg, rgba(10,16,24,.05) 30%, rgba(10,16,24,.72));
  }
  .figure figcaption{
    position:absolute; left:18px; right:18px; bottom:16px; z-index:2;
    font-size:13px; color:#CBD6E4;
  }

  /* 分点说明网格 */
  .points{
    display:grid;
    grid-template-columns:repeat(2, minmax(0,1fr));
    gap:20px;
  }
  .point{
    display:flex;
    gap:16px;
    padding:22px;
    border-radius:var(--radius);
    background:var(--glass);
    border:1px solid var(--line);
    box-shadow:inset 0 1px 0 rgba(255,255,255,.10);
    transition:transform var(--ease), border-color var(--ease), box-shadow var(--ease);
  }
  .point:hover{
    transform:translateY(-4px);
    border-color:var(--line-strong);
    box-shadow:var(--shadow-card);
  }
  .point-icon{
    flex:0 0 auto;
    width:44px; height:44px;
    display:grid; place-items:center;
    border-radius:12px;
    background:rgba(46,211,183,.10);
    border:1px solid rgba(46,211,183,.28);
    color:var(--cyan);
  }
  .point h3{ font-size:17px; margin-bottom:6px; }
  .point p{ font-size:14.4px; color:var(--muted); line-height:1.78; }

  /* 数据条 */
  .stat-bar{
    display:grid;
    grid-template-columns:repeat(3, minmax(0,1fr));
    gap:1px;
    border-radius:var(--radius);
    overflow:hidden;
    border:1px solid var(--line);
    background:var(--line);
  }
  .stat{
    padding:24px;
    background:rgba(12,19,30,.86);
    backdrop-filter:blur(12px);
  }
  .stat strong{
    display:block;
    font-size:22px; color:var(--cyan);
    letter-spacing:-.01em;
    text-shadow:0 0 22px rgba(46,211,183,.45);
  }
  .stat span{ font-size:13.4px; color:var(--muted); line-height:1.7; }

  /* FAQ */
  .faq{ display:grid; gap:14px; max-width:900px; }
  .faq-item{
    border-radius:var(--radius);
    background:var(--glass);
    border:1px solid var(--line);
    box-shadow:inset 0 1px 0 rgba(255,255,255,.10);
    overflow:hidden;
    transition:border-color var(--ease), background-color var(--ease);
  }
  .faq-item[open]{ border-color:rgba(46,211,183,.32); background:var(--glass-2); }
  .faq-item summary{
    display:flex; align-items:center; justify-content:space-between; gap:16px;
    padding:18px 22px;
    font-size:16px; font-weight:600;
    cursor:pointer;
    list-style:none;
  }
  .faq-item summary::-webkit-details-marker{ display:none; }
  .faq-item summary:hover{ color:var(--cyan); }
  .faq-arrow{
    flex:0 0 auto;
    width:24px; height:24px;
    display:grid; place-items:center;
    color:var(--muted);
    transition:transform var(--ease), color var(--ease);
  }
  .faq-item[open] .faq-arrow{ transform:rotate(180deg); color:var(--cyan); }
  .faq-body{
    padding:0 22px 20px;
    font-size:14.6px; color:var(--muted); line-height:1.8;
  }

  /* CTA 带 */
  .cta-band{
    position:relative;
    overflow:hidden;
    border-radius:20px;
    padding:38px 40px;
    background:linear-gradient(120deg, rgba(46,211,183,.16), rgba(76,125,255,.14) 60%, rgba(255,255,255,.05));
    border:1px solid rgba(46,211,183,.28);
    box-shadow:0 0 42px rgba(46,211,183,.18), inset 0 1px 0 rgba(255,255,255,.18);
  }
  .cta-band h2{ font-size:clamp(21px,2.2vw,27px); }
  .cta-band p{ margin-top:12px; font-size:15px; color:#C4D0E0; max-width:60ch; }
  .cta-inner{
    display:flex; flex-wrap:wrap; align-items:center; justify-content:space-between; gap:26px;
  }

  /* 页脚 */
  .site-footer{
    position:relative; z-index:1;
    margin-left:var(--sidebar);
    border-top:1px solid var(--line);
    background:linear-gradient(180deg, rgba(10,16,24,.55), rgba(6,10,16,.95));
    padding:56px 0 28px;
  }
  .footer-grid{
    display:grid;
    grid-template-columns:1.5fr 1fr 1fr 1fr;
    gap:32px;
  }
  .footer-brand p{ margin-top:16px; font-size:14px; color:var(--muted); max-width:38ch; line-height:1.8; }
  .footer-tags{ display:flex; flex-wrap:wrap; gap:8px; margin-top:16px; }
  .tag{
    display:inline-flex; align-items:center;
    padding:4px 11px;
    font-size:12px; color:var(--muted);
    border-radius:22px 6px 22px 6px;
    border:1px solid var(--line);
    background:rgba(255,255,255,.04);
  }
  .footer-col h4{
    font-size:14px; color:var(--text); margin-bottom:14px;
    letter-spacing:.02em;
  }
  .footer-col ul{ display:grid; gap:10px; }
  .footer-col li{ font-size:13.6px; color:var(--muted); line-height:1.7; }
  .footer-col a{ color:var(--muted); }
  .footer-col a:hover{ color:var(--cyan); }
  .footer-bottom{
    margin-top:40px; padding-top:20px;
    border-top:1px solid var(--line);
    display:flex; flex-wrap:wrap; align-items:center; justify-content:space-between; gap:14px;
    font-size:13px; color:rgba(151,166,188,.9);
  }
  .to-top{
    width:42px; height:42px;
    display:grid; place-items:center;
    border-radius:12px;
    font-size:16px;
    color:var(--text);
    border:1px solid var(--line);
    background:var(--glass);
    transition:border-color var(--ease), transform var(--ease), box-shadow var(--ease);
  }
  .to-top:hover{ border-color:rgba(46,211,183,.55); transform:translateY(-3px); box-shadow:var(--shadow-glow); }

  /* 入场动效 */
  .reveal{ opacity:0; transform:translateY(12px); }
  .reveal.is-in{ animation:riseIn .45s ease-out both; }
  @keyframes riseIn{ from{ opacity:0; transform:translateY(12px);} to{ opacity:1; transform:translateY(0);} }

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

  /* 响应式 */
  @media (max-width:1279px){
    :root{ --sidebar:208px; }
  }
  @media (max-width:1023px){
    .sidebar{ display:none; }
    .mobile-bar{ display:flex; }
    .site-main{ margin-left:0; }
    .site-footer{ margin-left:0; }
    .section{ padding:64px 0; }
    .split{ grid-template-columns:1fr; gap:26px; }
    .points{ grid-template-columns:1fr; }
    .stat-bar{ grid-template-columns:1fr; }
    .footer-grid{ grid-template-columns:1fr 1fr; gap:28px; }
    body::after{ display:none; }
  }
  @media (max-width:767px){
    .container{ padding:0 18px; }
    .section{ padding:52px 0; }
    .hero-inner{ min-height:240px; padding:44px 0 38px; }
    .hero h1{ font-size:28px; }
    .step{ padding-left:0; padding-bottom:30px; }
    .step::before{ display:none; }
    .step-dot{ position:static; margin-bottom:12px; width:48px; height:48px; }
    .cta-band{ padding:28px 22px; }
    .footer-grid{ grid-template-columns:1fr; }
    .btn{ width:100%; }
    .btn-row{ flex-direction:column; }
    .figure img{ min-height:200px; }
  }
  @media (max-width:520px){
    body{ font-size:15px; }
    .hero h1{ font-size:25px; }
    .sec-head h2{ font-size:21px; }
    .card{ padding:20px; }
    .step-body{ padding:18px; }
    .footer-bottom{ flex-direction:column; align-items:flex-start; }
  }