/* roulang page: index */
:root{
  --bg-0:#05080F;
  --bg-1:#0A1220;
  --panel:#0F1A2B;
  --panel-2:#142236;
  --primary:#22D3C5;
  --primary-deep:#0E8F87;
  --accent:#FFB05C;
  --t1:#EAF2FA;
  --t2:#A7B6C9;
  --t3:#6F8098;
  --line:rgba(140,175,205,.14);
  --line-strong:rgba(34,211,197,.42);
  --glass:rgba(20,34,54,.55);
  --success:#34D399;
  --warn:#FFB05C;
  --danger:#FF6B6B;
  --r-card:16px;
  --r-img:12px;
  --r-btn:10px;
  --sh-1:0 2px 10px rgba(0,0,0,.35);
  --sh-2:0 18px 40px rgba(0,0,0,.45);
  --sh-glow:0 8px 28px rgba(34,211,197,.28);
  --space-xs:8px;
  --space-sm:14px;
  --space-md:24px;
  --space-lg:40px;
  --nav-h:68px;
  --max-w:1240px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--t2);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei UI","Source Han Sans SC","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.9;
  letter-spacing:.01em;
  overflow-x:hidden;
}
body.drawer-open{overflow:hidden;}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;padding:0;}
ul,ol{list-style:none;}
img{max-width:100%;height:auto;display:block;border-radius:var(--r-img);}
a{color:var(--t1);text-decoration:none;transition:color .22s ease,transform .22s ease,opacity .22s ease;}
a:hover{color:var(--primary);}
button{font-family:inherit;font-size:inherit;border:0;background:none;cursor:pointer;color:inherit;}
input,textarea,select{font-family:inherit;font-size:16px;}
:focus{outline:none;}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px;}
.num,.stat-num,.glass-num,.news-time{font-family:"Inter","SF Pro Display","Segoe UI",sans-serif;font-variant-numeric:tabular-nums;}
.grid-container{max-width:var(--max-w);margin:0 auto;padding-left:24px;padding-right:24px;width:100%;}
@media(min-width:1600px){.grid-container{max-width:1320px;}}

/* ---------- 通用组件 ---------- */
.eyebrow{
  display:inline-block;
  font-size:12px;
  letter-spacing:.08em;
  color:var(--primary);
  border:1px solid var(--line-strong);
  border-radius:999px;
  padding:4px 12px;
  margin-bottom:16px;
  font-weight:500;
}
.section{padding:96px 0;position:relative;}
.section--alt{background:var(--bg-1);}
.section-head{margin-bottom:32px;}
.section-head h2{
  font-size:clamp(24px,3vw,36px);
  line-height:1.3;
  font-weight:700;
  color:var(--t1);
  margin-bottom:14px;
}
.section-head .lead{font-size:16px;color:var(--t2);max-width:760px;}
.section-head--row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;}
.link-more{color:var(--primary);font-size:14px;display:inline-flex;align-items:center;gap:6px;}
.link-more:hover{color:var(--t1);}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--r-btn);
  padding:13px 26px;
  font-size:15px;
  font-weight:600;
  letter-spacing:.02em;
  transition:transform .22s ease,box-shadow .22s ease,background-color .22s ease,color .22s ease,border-color .22s ease;
  position:relative;
  overflow:hidden;
  min-height:46px;
  border:1px solid transparent;
}
.btn-primary{background:var(--primary);color:#05121A;box-shadow:var(--sh-glow);}
.btn-primary::after{
  content:"";position:absolute;top:0;left:-120%;width:60%;height:100%;
  background:linear-gradient(100deg,rgba(255,255,255,0) 0%,rgba(255,255,255,.45) 50%,rgba(255,255,255,0) 100%);
  transition:left .24s ease;
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 34px rgba(34,211,197,.42);color:#05121A;}
.btn-primary:hover::after{left:120%;}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{border-color:rgba(34,211,197,.5);color:var(--t1);background:transparent;}
.btn-ghost:hover{background:rgba(34,211,197,.08);color:var(--primary);transform:translateY(-2px);}
.btn-ghost:active{transform:translateY(1px);}
.btn-accent{background:var(--accent);color:#1A1206;box-shadow:0 10px 30px rgba(255,176,92,.26);}
.btn-accent:hover{transform:translateY(-2px);color:#1A1206;box-shadow:0 14px 36px rgba(255,176,92,.38);}
.btn-sm{padding:10px 18px;font-size:14px;min-height:44px;}
.badge{
  display:inline-block;
  font-size:12px;
  letter-spacing:.06em;
  color:var(--primary);
  background:rgba(34,211,197,.1);
  border:1px solid rgba(34,211,197,.28);
  border-radius:6px;
  padding:3px 10px;
  line-height:1.6;
}
.divider{height:1px;background:var(--line);border:0;margin:0;}

/* ---------- 导航 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:90;
  height:var(--nav-h);
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background-color .28s ease,backdrop-filter .28s ease,border-color .28s ease,box-shadow .28s ease;
}
.site-header.is-scrolled{
  background:var(--glass);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid transparent;
  border-image:linear-gradient(90deg,rgba(34,211,197,0),rgba(34,211,197,.55),rgba(34,211,197,0)) 1;
  box-shadow:0 10px 30px rgba(0,0,0,.42);
}
.nav-inner{
  height:var(--nav-h);
  display:flex;align-items:center;justify-content:space-between;gap:20px;
}
.logo{display:inline-flex;align-items:center;gap:10px;color:var(--t1);font-weight:700;font-size:17px;letter-spacing:.02em;}
.logo:hover{color:var(--t1);}
.logo-mark{
  width:34px;height:34px;border-radius:10px;
  display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(150deg,rgba(34,211,197,.9),rgba(14,143,135,.85));
  box-shadow:0 6px 18px rgba(34,211,197,.28);
  flex:0 0 auto;
}
.logo-mark svg{width:18px;height:18px;display:block;}
.logo-text .logo-sub{display:block;font-size:11px;font-weight:400;color:var(--t3);letter-spacing:.06em;line-height:1.2;}
.nav-menu{display:flex;align-items:center;gap:6px;}
.nav-menu li{position:relative;}
.nav-link{
  display:inline-block;
  padding:10px 12px;
  font-size:15px;
  color:var(--t2);
  border-radius:8px;
  transition:color .2s ease,background-color .2s ease;
}
.nav-link:hover{color:var(--t1);background:rgba(34,211,197,.07);}
.nav-link[aria-current="page"]{color:var(--t1);}
.nav-link[aria-current="page"]::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;border-radius:2px;background:var(--primary);
}
.nav-actions{display:flex;align-items:center;gap:10px;}
.icon-btn{
  width:44px;height:44px;border-radius:10px;
  display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);color:var(--t2);
  transition:color .2s ease,border-color .2s ease,background-color .2s ease;
}
.icon-btn:hover{color:var(--primary);border-color:var(--line-strong);background:rgba(34,211,197,.06);}
.icon-btn svg{width:18px;height:18px;}
.hamburger{display:none;}
.drawer{
  position:fixed;inset:0;z-index:120;
  background:rgba(5,8,15,.92);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  padding:24px;
  display:none;
  flex-direction:column;
  overflow-y:auto;
}
.drawer.is-open{display:flex;}
.drawer-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px;}
.drawer-group{margin-bottom:26px;}
.drawer-group h4{font-size:12px;letter-spacing:.08em;color:var(--t3);font-weight:500;margin-bottom:12px;}
.drawer-group a{
  display:block;padding:14px 4px;font-size:16px;color:var(--t1);
  border-bottom:1px solid var(--line);
}
.drawer-group a:hover{color:var(--primary);padding-left:8px;}
.drawer-cta{margin-top:auto;padding-top:16px;}

/* ---------- Hero ---------- */
.hero{
  position:relative;
  padding-top:calc(var(--nav-h) + 32px);
  padding-bottom:64px;
  background:
    linear-gradient(rgba(140,175,205,.055) 1px,transparent 1px) 0 0/56px 56px,
    linear-gradient(90deg,rgba(140,175,205,.055) 1px,transparent 1px) 0 0/56px 56px,
    var(--bg-0);
  overflow:hidden;
}
.hero::after{
  content:"";position:absolute;right:-10%;top:10%;width:46%;height:70%;
  background:linear-gradient(120deg,rgba(34,211,197,.05),rgba(34,211,197,0));
  transform:skewX(-14deg);pointer-events:none;
}
.hero-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;position:relative;z-index:2;}
.hero-title{
  font-size:clamp(30px,4.4vw,52px);
  line-height:1.18;
  font-weight:700;
  color:var(--t1);
  margin-bottom:20px;
}
.hero-sub{font-size:17px;color:var(--t2);max-width:520px;margin-bottom:28px;}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:26px;}
.trust-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13px;color:var(--t3);letter-spacing:.04em;}
.trust-row span.dot{width:5px;height:5px;border-radius:50%;background:var(--primary);display:inline-block;}
.hero-visual{position:relative;border-radius:var(--r-card);overflow:hidden;min-height:440px;border:1px solid var(--line);box-shadow:var(--sh-2);}
.hero-bg{width:100%;height:100%;min-height:440px;object-fit:cover;object-position:center right;border-radius:0;}
.hero-mask{
  position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(5,8,15,.94) 0%,rgba(5,8,15,.55) 42%,rgba(5,8,15,.05) 100%);
}
.glass-card,.glass-tag{
  position:absolute;
  background:var(--glass);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border:1px solid rgba(120,200,210,.14);
  border-radius:var(--r-card);
  box-shadow:var(--sh-1);
}
.glass-card{padding:18px 22px;left:26px;bottom:26px;min-width:180px;animation:float 6s ease-in-out infinite;}
.glass-num{display:block;font-size:clamp(32px,4vw,44px);font-weight:700;color:var(--primary);line-height:1.1;}
.glass-label{display:block;font-size:12px;color:var(--t3);letter-spacing:.08em;margin-top:6px;}
.glass-tag{
  top:24px;right:24px;padding:10px 16px;font-size:13px;color:var(--t1);
  display:inline-flex;align-items:center;gap:8px;border-radius:999px;
  animation:float 7s ease-in-out infinite reverse;
}
.glass-tag i{width:7px;height:7px;border-radius:50%;background:var(--primary);display:inline-block;box-shadow:0 0 10px var(--primary);}
@keyframes float{0%,100%{transform:translateY(0);}50%{transform:translateY(-8px);}}
@media(prefers-reduced-motion:reduce){
  .glass-card,.glass-tag{animation:none;}
  html{scroll-behavior:auto;}
  *{transition:none!important;}
}

/* ---------- 痛点编号条目 ---------- */
.pain-layout{display:grid;grid-template-columns:0.9fr 1.4fr;gap:56px;}
.pain-col{display:grid;gap:0;}
.pain-item{
  display:grid;grid-template-columns:auto 1fr;gap:20px;
  padding:26px 0;
  border-bottom:1px solid var(--line);
}
.pain-item:first-child{padding-top:0;}
.pain-num{
  font-size:20px;font-weight:700;color:var(--primary);letter-spacing:.04em;
  width:44px;flex:0 0 auto;
}
.pain-body h3{font-size:19px;color:var(--t1);font-weight:600;line-height:1.5;margin-bottom:8px;}
.pain-body p{font-size:15px;color:var(--t2);margin:0;}
.pain-line{width:36px;height:3px;background:var(--primary);border-radius:2px;margin-bottom:14px;}
.pain-offset{margin-top:24px;}

/* ---------- 解决方案 ---------- */
.solution-grid{display:grid;grid-template-columns:1.05fr 1fr;gap:48px;align-items:center;}
.solution-media{position:relative;border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);box-shadow:var(--sh-1);}
.solution-media img{width:100%;height:340px;object-fit:cover;object-position:left center;border-radius:0;}
.media-panel{
  position:relative;margin:-56px 0 0 24px;width:calc(100% - 48px);
  background:var(--panel-2);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:18px 22px;
  display:grid;grid-template-columns:1fr 1fr;
  gap:12px 20px;
  box-shadow:var(--sh-2);
  clip-path:polygon(14px 0,100% 0,100% calc(100% - 14px),calc(100% - 14px) 100%,0 100%,0 14px);
}
.media-panel dt{font-size:12px;color:var(--t3);letter-spacing:.06em;}
.media-panel dd{margin:2px 0 0;font-size:15px;color:var(--t1);font-weight:600;}
.cap-list{display:grid;gap:0;}
.cap-item{padding:22px 0;border-bottom:1px solid var(--line);}
.cap-item:first-child{padding-top:0;}
.cap-item:last-child{border-bottom:0;}
.cap-head{display:flex;align-items:baseline;gap:12px;margin-bottom:8px;}
.cap-index{font-size:13px;color:var(--primary);font-weight:600;letter-spacing:.06em;}
.cap-item h3{font-size:20px;color:var(--t1);font-weight:600;line-height:1.45;}
.cap-item p{font-size:15px;color:var(--t2);margin:0;}

/* ---------- 数据带 ---------- */
.stats-band{
  position:relative;
  border-top:1px solid transparent;
  border-image:linear-gradient(90deg,rgba(34,211,197,.85),rgba(34,211,197,0)) 1;
  background:
    linear-gradient(rgba(140,175,205,.05) 1px,transparent 1px) 0 0/48px 48px,
    linear-gradient(90deg,rgba(140,175,205,.05) 1px,transparent 1px) 0 0/48px 48px,
    var(--bg-1);
  padding:64px 0;
}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:32px;}
.stat-num{font-size:clamp(32px,4vw,48px);font-weight:700;color:var(--t1);line-height:1.1;display:block;}
.stat-num .unit{font-size:.5em;color:var(--primary);margin-left:4px;font-weight:600;}
.stat-label{display:block;font-size:12px;color:var(--t3);letter-spacing:.08em;margin-top:8px;}

/* ---------- 证言 ---------- */
.testi-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;align-items:start;}
.testi-card{
  position:relative;
  background:var(--glass);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border:1px solid rgba(120,200,210,.14);
  border-radius:var(--r-card);
  padding:30px 26px 24px;
  box-shadow:var(--sh-1);
  transition:transform .24s ease,box-shadow .24s ease,border-color .24s ease;
}
.testi-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:var(--line-strong);}
.testi-card::before{
  content:"\201C";
  position:absolute;top:8px;left:20px;
  font-size:56px;line-height:1;color:rgba(34,211,197,.30);
  font-family:Georgia,serif;
}
.testi-card p{font-size:15px;color:var(--t2);margin-bottom:20px;padding-top:14px;}
.who{display:flex;align-items:center;gap:12px;}
.avatar{
  width:40px;height:40px;border-radius:50%;flex:0 0 auto;
  display:inline-flex;align-items:center;justify-content:center;
  font-size:15px;font-weight:700;color:#05121A;
  background:linear-gradient(150deg,#22D3C5,#0E8F87);
}
.who-name{display:block;font-size:14px;color:var(--t1);font-weight:600;line-height:1.4;}
.who-role{display:block;font-size:12px;color:var(--t3);line-height:1.5;}
.testi-offset{margin-top:34px;}
.testi-offset-2{margin-top:18px;}

/* ---------- 资讯卡片 ---------- */
.news-grid{margin-top:8px;}
.news-card{
  display:flex;flex-direction:column;
  height:100%;
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
  transition:transform .24s ease,box-shadow .24s ease,border-color .24s ease;
  box-shadow:var(--sh-1);
}
.news-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--sh-2);}
.news-thumb{position:relative;overflow:hidden;aspect-ratio:16/9;background:var(--panel-2);}
.news-thumb img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform .26s ease;}
.news-card:hover .news-thumb img{transform:scale(1.03);}
.news-body{padding:20px 20px 22px;display:flex;flex-direction:column;gap:12px;flex:1;}
.news-title{font-size:18px;line-height:1.5;color:var(--t1);font-weight:600;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-sum{font-size:14px;line-height:1.8;color:var(--t2);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:auto;}
.news-time{font-size:12px;color:var(--t3);letter-spacing:.04em;}
.empty-state{
  border:1px dashed var(--line-strong);border-radius:var(--r-card);
  padding:56px 24px;text-align:center;background:var(--panel);
}
.empty-state svg{width:56px;height:56px;margin:0 auto 16px;display:block;color:var(--primary);opacity:.85;}
.empty-state p{font-size:15px;color:var(--t2);margin-bottom:18px;}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:900px;margin:0 auto;}
.accordion{border:0;background:transparent;margin:0;}
.accordion .accordion-item{border:0;border-bottom:1px solid var(--line);background:transparent;}
.accordion .accordion-item:first-child{border-top:1px solid var(--line);}
.accordion .accordion-title{
  display:block;position:relative;
  padding:22px 52px 22px 0;
  font-size:16px;font-weight:500;color:var(--t1);
  background:transparent;border:0;line-height:1.6;
  transition:color .2s ease;
}
.accordion .accordion-title:hover{color:var(--primary);background:transparent;}
.accordion .accordion-title::before{
  content:"";position:absolute;right:14px;top:50%;
  width:9px;height:9px;margin-top:-7px;
  border-right:2px solid var(--primary);border-bottom:2px solid var(--primary);
  transform:rotate(45deg);transition:transform .2s ease;
}
.accordion .accordion-item.is-active .accordion-title::before{transform:rotate(-135deg);margin-top:-2px;}
.accordion .accordion-content{
  padding:0 52px 24px 0;border:0;background:transparent;
  font-size:15px;line-height:1.85;color:var(--t2);
}

/* ---------- 最终 CTA ---------- */
.cta-band{
  position:relative;
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:52px 48px;
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
  clip-path:polygon(16px 0,100% 0,100% calc(100% - 16px),calc(100% - 16px) 100%,0 100%,0 16px);
  overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:4px;
  background:linear-gradient(180deg,var(--primary),rgba(34,211,197,0));
}
.cta-band h2{font-size:clamp(22px,2.6vw,30px);color:var(--t1);font-weight:700;line-height:1.35;margin-bottom:10px;}
.cta-band p{font-size:15px;color:var(--t2);max-width:560px;}
.cta-actions{display:flex;align-items:center;gap:18px;flex-wrap:wrap;}
.cta-actions .text-link{font-size:14px;color:var(--t2);border-bottom:1px solid var(--line);}
.cta-actions .text-link:hover{color:var(--primary);border-color:var(--primary);}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--bg-0);
  border-top:1px solid transparent;
  border-image:linear-gradient(90deg,rgba(34,211,197,0),rgba(34,211,197,.6),rgba(34,211,197,0)) 1;
  padding:68px 0 0;
  margin-top:96px;
}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:48px;}
.footer-brand{display:inline-flex;align-items:center;gap:10px;color:var(--t1);font-weight:700;font-size:17px;margin-bottom:16px;}
.footer-col p{font-size:14px;color:var(--t3);line-height:1.8;max-width:340px;}
.footer-col h4{font-size:13px;letter-spacing:.08em;color:var(--t1);font-weight:600;margin-bottom:16px;}
.footer-col li{margin-bottom:10px;}
.footer-col li a{font-size:14px;color:var(--t2);display:inline-block;}
.footer-col li a:hover{color:var(--primary);transform:translateX(2px);}
.footer-bottom{
  border-top:1px solid var(--line);
  padding:22px 0 30px;
  display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;
  font-size:13px;color:var(--t3);
}
.footer-bottom .to-top{
  display:inline-flex;align-items:center;gap:8px;
  border:1px solid var(--line);border-radius:var(--r-btn);
  padding:9px 16px;font-size:13px;color:var(--t2);min-height:44px;
}
.footer-bottom .to-top:hover{color:var(--primary);border-color:var(--line-strong);}

/* ---------- 响应式 ---------- */
@media(max-width:1279px){
  .hero-grid{gap:40px;}
}
@media(max-width:1023px){
  .section{padding:72px 0;}
  .hero{padding-bottom:48px;}
  .hero-grid{grid-template-columns:1fr;gap:36px;}
  .hero-visual{min-height:260px;}
  .hero-bg{min-height:260px;object-position:center;}
  .pain-layout{grid-template-columns:1fr;gap:32px;}
  .pain-offset{margin-top:0;}
  .solution-grid{grid-template-columns:1fr;gap:32px;}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:28px;}
  .testi-grid{grid-template-columns:1fr;gap:20px;}
  .testi-offset,.testi-offset-2{margin-top:0;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .site-footer{margin-top:72px;}
}
@media(max-width:767px){
  :root{--nav-h:56px;}
  .grid-container{padding-left:20px;padding-right:20px;}
  .section{padding:48px 0;}
  .nav-menu{display:none;}
  .nav-actions .icon-btn.search-btn{display:none;}
  .hamburger{display:inline-flex;}
  .nav-actions .btn{display:none;}
  .hero{padding-top:calc(var(--nav-h) + 32px);padding-bottom:40px;}
  .hero-title{font-size:30px;}
  .hero-sub{font-size:16px;}
  .glass-card{left:16px;bottom:16px;padding:14px 18px;}
  .glass-tag{top:16px;right:16px;padding:8px 13px;font-size:12px;}
  .solution-media img{height:220px;}
  .media-panel{margin:-40px 0 0 0;width:100%;grid-template-columns:1fr 1fr;}
  .stats-grid{grid-template-columns:1fr 1fr;gap:24px;}
  .cta-band{padding:32px 24px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:32px;}
  .site-footer{padding-top:48px;margin-top:48px;}
  .accordion .accordion-title{padding:18px 44px 18px 0;font-size:15px;}
  .accordion .accordion-content{padding:0 30px 20px 0;}
}
@media(max-width:575px){
  .hero-cta{gap:10px;}
  .btn{width:100%;}
  .hero-cta .btn,.cta-actions .btn{width:100%;}
  .cta-actions{width:100%;}
}

/* roulang page: article */
:root{
  --bg-0:#05080F;
  --bg-1:#0A1220;
  --panel:#0F1A2B;
  --panel-2:#142236;
  --primary:#22D3C5;
  --primary-deep:#0E8F87;
  --accent:#FFB05C;
  --t1:#EAF2FA;
  --t2:#A7B6C9;
  --t3:#6F8098;
  --line:rgba(140,175,205,.14);
  --line-strong:rgba(34,211,197,.42);
  --success:#34D399;
  --warn:#FFB05C;
  --danger:#FF6B6B;
  --glass:rgba(20,34,54,.55);
  --r-card:16px;
  --r-img:12px;
  --r-btn:10px;
  --sh-1:0 2px 10px rgba(0,0,0,.35);
  --sh-2:0 18px 40px rgba(0,0,0,.45);
  --sh-glow:0 8px 28px rgba(34,211,197,.28);
  --maxw:1240px;
  --sec:96px;
  --fn-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei UI","Source Han Sans SC","Noto Sans SC",sans-serif;
  --fn-num:"Inter","SF Pro Display","Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--t2);
  font-family:var(--fn-cn);
  font-size:16px;
  line-height:1.9;
  letter-spacing:.01em;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--t1);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--primary)}
button{font-family:inherit;font-size:inherit;cursor:pointer;border:0;background:none;color:inherit}
input,textarea,select{font-family:inherit;font-size:inherit}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:4px}
::selection{background:rgba(34,211,197,.28);color:#fff}

.grid-container{max-width:var(--maxw);margin:0 auto;padding-left:24px;padding-right:24px;width:100%}
@media (min-width:1600px){:root{--maxw:1320px}}
@media (max-width:768px){.grid-container{padding-left:20px;padding-right:20px}}

/* ============ 顶部导航 ============ */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:120;
  height:68px;
  background:transparent;
  transition:background .28s ease,backdrop-filter .28s ease,box-shadow .28s ease,height .28s ease;
}
.site-header::after{
  content:"";
  position:absolute;left:0;right:0;bottom:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(34,211,197,.55),transparent);
  opacity:0;
  transition:opacity .28s ease;
}
.site-header.is-scrolled{
  background:rgba(6,12,22,.72);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  box-shadow:0 10px 30px rgba(0,0,0,.4);
}
.site-header.is-scrolled::after{opacity:1}
.nav-inner{
  height:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
}
.logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.logo-mark{
  width:34px;height:34px;flex:0 0 34px;
  display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(150deg,var(--primary),var(--primary-deep));
  border-radius:10px;
  box-shadow:0 6px 18px rgba(34,211,197,.24);
}
.logo-mark svg{width:20px;height:20px}
.logo-text{
  display:flex;flex-direction:column;
  font-size:16px;font-weight:700;color:var(--t1);
  line-height:1.2;letter-spacing:.02em;
}
.logo-sub{
  font-size:11px;font-weight:400;color:var(--t3);
  letter-spacing:.06em;margin-top:2px;
}
.nav-menu{display:flex;align-items:center;gap:6px}
.nav-menu li{list-style:none}
.nav-link{
  position:relative;
  display:inline-block;
  padding:10px 14px;
  font-size:15px;
  color:var(--t2);
  border-radius:8px;
  transition:color .2s ease,background .2s ease;
}
.nav-link::after{
  content:"";
  position:absolute;left:14px;right:14px;bottom:4px;height:2px;
  background:var(--primary);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .24s ease;
  border-radius:2px;
}
.nav-link:hover{color:var(--t1);background:rgba(34,211,197,.06)}
.nav-link:hover::after,.nav-link[aria-current="page"]::after{transform:scaleX(1)}
.nav-link[aria-current="page"]{color:var(--t1);font-weight:600}
.nav-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.icon-btn{
  width:42px;height:42px;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:var(--r-btn);
  border:1px solid var(--line);
  color:var(--t2);
  transition:border-color .2s ease,color .2s ease,background .2s ease;
}
.icon-btn svg{width:19px;height:19px}
.icon-btn:hover{color:var(--primary);border-color:var(--line-strong);background:rgba(34,211,197,.07)}
.hamburger{display:none}

/* ============ 按钮 ============ */
.btn{
  position:relative;
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 24px;
  font-size:15px;font-weight:600;
  border-radius:var(--r-btn);
  overflow:hidden;
  transition:transform .2s ease,box-shadow .24s ease,background .2s ease,color .2s ease,border-color .2s ease;
  white-space:nowrap;
}
.btn svg{width:16px;height:16px}
.btn-primary{background:var(--primary);color:#05121A;box-shadow:0 6px 18px rgba(34,211,197,.2)}
.btn-primary::before{
  content:"";position:absolute;top:0;left:-120%;width:60%;height:100%;
  background:linear-gradient(100deg,transparent,rgba(255,255,255,.55),transparent);
  transition:left .24s ease;
}
.btn-primary:hover{color:#05121A;transform:translateY(-2px);box-shadow:var(--sh-glow)}
.btn-primary:hover::before{left:130%}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{
  background:transparent;color:var(--t1);
  border:1px solid rgba(34,211,197,.5);
}
.btn-ghost:hover{color:var(--primary);background:rgba(34,211,197,.08);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(1px)}
.btn-accent{background:var(--accent);color:#171008;font-weight:700}
.btn-accent:hover{color:#171008;transform:translateY(-2px);box-shadow:0 12px 30px rgba(255,176,92,.28)}
.btn-sm{padding:9px 18px;font-size:14px}
.btn-block{width:100%}

/* ============ 标签 / 徽章 ============ */
.badge{
  display:inline-flex;align-items:center;
  padding:4px 11px;
  font-size:12px;
  letter-spacing:.06em;
  color:var(--primary);
  background:rgba(34,211,197,.1);
  border:1px solid rgba(34,211,197,.28);
  border-radius:999px;
}
.badge-outline{
  color:var(--t2);
  background:transparent;
  border:1px solid var(--line);
  border-radius:8px;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.14em;
  color:var(--primary);
  text-transform:none;
  font-family:var(--fn-num);
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--primary);border-radius:2px}

/* ============ 抽屉菜单 ============ */
.mobile-drawer{
  position:fixed;inset:0;z-index:200;
  background:rgba(5,8,15,.88);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  display:flex;flex-direction:column;
  padding:24px 22px 32px;
  transform:translateX(100%);
  transition:transform .3s ease;
  overflow-y:auto;
}
.mobile-drawer.is-open{transform:translateX(0)}
.drawer-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:28px}
.drawer-group{margin-bottom:26px}
.drawer-group h4{
  font-size:12px;letter-spacing:.14em;color:var(--t3);
  font-weight:500;margin-bottom:12px;
}
.drawer-group a{
  display:flex;align-items:center;min-height:46px;
  font-size:17px;color:var(--t1);
  border-bottom:1px solid var(--line);
}
.drawer-group a:hover{color:var(--primary);padding-left:4px}
.drawer-foot{margin-top:auto;padding-top:20px}

/* ============ 文章主体 ============ */
main{display:block;padding-top:104px;padding-bottom:96px}
.page-shell{max-width:var(--maxw);margin:0 auto;padding:0 24px}

.breadcrumb{margin-bottom:22px}
.breadcrumb ol{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--t3);
}
.breadcrumb li{display:inline-flex;align-items:center;gap:8px;min-width:0}
.breadcrumb li+li::before{content:"/";color:var(--t3);opacity:.65}
.breadcrumb a{color:var(--t2);max-width:220px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb [aria-current="page"]{color:var(--t3);max-width:320px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

.article-head{
  max-width:820px;
  margin:0 auto 34px;
  padding-bottom:28px;
  border-bottom:1px solid var(--line);
}
.article-title{
  font-size:clamp(26px,3.4vw,40px);
  line-height:1.28;
  font-weight:700;
  color:var(--t1);
  letter-spacing:.01em;
  margin:14px 0 18px;
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:14px;
  font-size:13px;color:var(--t3);
}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--t3);opacity:.6}
.article-meta time{color:var(--primary);font-family:var(--fn-num);font-variant-numeric:tabular-nums}

/* 正文排版 */
.article-layout{
  display:block;
  max-width:820px;
  margin:0 auto;
}
.article-body{font-size:17px;line-height:1.9;color:var(--t2)}
.article-body p{margin:0 0 20px}
.article-body > p:first-of-type{font-size:17px}
.article-body h2{
  position:relative;
  font-size:24px;line-height:1.45;font-weight:700;color:var(--t1);
  margin:44px 0 18px;
  padding-left:14px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:5px;bottom:5px;width:3px;
  background:var(--primary);border-radius:3px;
}
.article-body h3{
  font-size:20px;line-height:1.5;font-weight:600;color:var(--t1);
  margin:32px 0 14px;
}
.article-body h4{font-size:17px;font-weight:600;color:var(--t1);margin:24px 0 12px}
.article-body ul,.article-body ol{margin:0 0 20px;padding-left:22px}
.article-body ul li{list-style:disc;margin-bottom:8px}
.article-body ol li{list-style:decimal;margin-bottom:8px}
.article-body li::marker{color:var(--primary)}
.article-body a{
  color:var(--t1);
  text-decoration:underline;
  text-decoration-color:rgba(34,211,197,.5);
  text-underline-offset:3px;
}
.article-body a:hover{color:var(--primary)}
.article-body strong{color:var(--t1);font-weight:600}
.article-body blockquote{
  margin:24px 0;
  padding:18px 20px;
  background:rgba(20,34,54,.5);
  border-left:3px solid var(--primary);
  border-radius:0 var(--r-img) var(--r-img) 0;
  color:var(--t1);
  font-size:16px;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{
  width:100%;
  border-radius:var(--r-img);
  margin:24px 0 8px;
  border:1px solid var(--line);
}
.article-body figcaption{
  font-size:12px;color:var(--t3);margin-bottom:22px;
}
.article-body table{
  width:100%;
  border-collapse:collapse;
  font-size:15px;
  margin:20px 0;
  min-width:520px;
}
.article-body .table-wrap{
  overflow-x:auto;
  border:1px solid var(--line);
  border-radius:var(--r-img);
  margin:24px 0;
}
.article-body th,.article-body td{
  padding:12px 14px;
  border-bottom:1px solid var(--line);
  text-align:left;
}
.article-body th{color:var(--t1);background:rgba(20,34,54,.6);font-weight:600}
.article-body tr:last-child td{border-bottom:0}
.article-body code{
  font-family:ui-monospace,Menlo,Consolas,monospace;
  font-size:14px;
  padding:2px 6px;
  border-radius:6px;
  background:rgba(34,211,197,.1);
  color:var(--primary);
}
.article-body pre{
  background:#070D18;
  border:1px solid var(--line);
  border-radius:var(--r-img);
  padding:16px 18px;
  overflow-x:auto;
  margin:22px 0;
}
.article-body pre code{background:none;padding:0;color:var(--t2)}

/* 未找到 */
.notfound{
  padding:40px 26px;
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  text-align:center;
  box-shadow:var(--sh-1);
}
.notfound svg{width:54px;height:54px;margin:0 auto 16px;color:var(--primary);opacity:.85}
.notfound h2{font-size:20px;color:var(--t1);margin-bottom:10px}
.notfound p{font-size:15px;color:var(--t2);margin-bottom:22px}

/* 文末 */
.article-foot{
  max-width:820px;
  margin:46px auto 0;
  padding-top:28px;
  border-top:1px solid var(--line);
}
.tag-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:22px}
.tag-row .tag{
  display:inline-flex;align-items:center;
  padding:6px 14px;
  font-size:13px;color:var(--t2);
  border:1px solid var(--line);
  border-radius:8px;
  transition:color .2s ease,border-color .2s ease,background .2s ease;
}
.tag-row .tag:hover{color:var(--primary);border-color:var(--line-strong);background:rgba(34,211,197,.07)}

/* 相关推荐 */
.related{margin-top:80px}
.related-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:18px;
  margin-bottom:28px;
  padding-bottom:16px;
  border-bottom:1px solid var(--line);
}
.related-head h2{
  font-size:clamp(20px,2.2vw,26px);
  color:var(--t1);font-weight:700;line-height:1.35;
}
.related-head a{font-size:14px;color:var(--primary)}
.related-head a:hover{color:#fff}
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}
.card{
  display:flex;flex-direction:column;
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
  transition:transform .24s ease,border-color .24s ease,box-shadow .24s ease;
  height:100%;
}
.card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--sh-2)}
.card-cover{
  position:relative;
  aspect-ratio:16/9;
  overflow:hidden;
  background:var(--panel-2);
}
.card-cover img{
  width:100%;height:100%;object-fit:cover;
  transition:transform .3s ease;
}
.card:hover .card-cover img{transform:scale(1.03)}
.card-body{padding:18px 18px 20px;display:flex;flex-direction:column;flex:1}
.card-body .badge{align-self:flex-start;margin-bottom:12px}
.card-title{
  font-size:17px;line-height:1.5;font-weight:600;color:var(--t1);
  margin-bottom:10px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.card-desc{
  font-size:14px;line-height:1.75;color:var(--t2);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  margin-bottom:14px;
}
.card-time{
  margin-top:auto;
  font-size:12px;color:var(--t3);
  font-family:var(--fn-num);font-variant-numeric:tabular-nums;
}

/* ============ 页脚 ============ */
.site-footer{
  position:relative;
  background:var(--bg-0);
  border-top:1px solid var(--line);
  padding:64px 0 26px;
  margin-top:40px;
}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,rgba(34,211,197,0),rgba(34,211,197,.7),rgba(34,211,197,0));
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1fr;
  gap:34px;
  padding-bottom:38px;
  border-bottom:1px solid var(--line);
}
.footer-brand{
  display:inline-flex;align-items:center;gap:10px;
  font-size:16px;font-weight:700;color:var(--t1);
  margin-bottom:14px;
}
.footer-col p{font-size:14px;line-height:1.8;color:var(--t3);max-width:340px}
.footer-col h4{
  font-size:13px;letter-spacing:.1em;color:var(--t1);
  font-weight:600;margin-bottom:16px;
}
.footer-col ul li{margin-bottom:10px}
.footer-col ul a{
  font-size:14px;color:var(--t3);
  display:inline-block;
  transition:color .2s ease,transform .2s ease;
}
.footer-col ul a:hover{color:var(--primary);transform:translateX(2px)}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;
  padding-top:22px;
  font-size:13px;color:var(--t3);
}
.to-top{
  display:inline-flex;align-items:center;gap:6px;
  font-size:13px;color:var(--t2);
}
.to-top:hover{color:var(--primary)}

/* ============ 响应式 ============ */
@media (max-width:1023px){
  :root{--sec:72px}
  main{padding-top:96px}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:900px){
  .nav-menu{display:none}
  .hamburger{display:inline-flex}
  .nav-actions .btn-primary{display:none}
}
@media (max-width:767px){
  :root{--sec:48px}
  .site-header{height:56px}
  main{padding-top:82px;padding-bottom:56px}
  .page-shell{padding:0 20px}
  .article-body{font-size:16px}
  .article-body h2{font-size:21px;margin-top:34px}
  .article-body h3{font-size:18px}
  .article-body img{margin-left:-20px;margin-right:-20px;width:calc(100% + 40px);border-radius:0}
  .article-head{margin-bottom:24px;padding-bottom:20px}
  .card-grid{grid-template-columns:1fr}
  .related{margin-top:56px}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .logo-text{font-size:15px}
  .logo-sub{display:none}
}
@media (max-width:520px){
  .logo-text{font-size:14px}
  .icon-btn{width:44px;height:44px}
  .article-meta{gap:10px}
  .breadcrumb a,.breadcrumb [aria-current="page"]{max-width:150px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
}

/* roulang page: category2 */
:root{
  --bg-0:#05080F;
  --bg-1:#0A1220;
  --panel:#0F1A2B;
  --panel-2:#142236;
  --primary:#22D3C5;
  --primary-deep:#0E8F87;
  --accent:#FFB05C;
  --t1:#EAF2FA;
  --t2:#A7B6C9;
  --t3:#6F8098;
  --line:rgba(140,175,205,.14);
  --line-strong:rgba(34,211,197,.42);
  --glass:rgba(20,34,54,.55);
  --success:#34D399;
  --warn:#FFB05C;
  --danger:#FF6B6B;
  --r-card:16px;
  --r-img:12px;
  --r-btn:10px;
  --sh-1:0 2px 10px rgba(0,0,0,.35);
  --sh-2:0 18px 40px rgba(0,0,0,.45);
  --sh-glow:0 8px 28px rgba(34,211,197,.28);
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei UI","Source Han Sans SC","Noto Sans SC",sans-serif;
  --font-num:"Inter","SF Pro Display","Segoe UI",sans-serif;
  --sec:96px;
  --nav-h:68px;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--t2);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.9;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body.no-scroll{overflow:hidden;}
img{display:block;max-width:100%;height:auto;}
a{color:inherit;text-decoration:none;transition:color .2s ease,background-color .2s ease,transform .2s ease;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
h1,h2,h3,h4{margin:0;color:var(--t1);font-weight:700;letter-spacing:.01em;}
p{margin:0;}
svg{display:block;}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:4px;}

.grid-container{
  width:100%;
  max-width:1240px;
  margin:0 auto;
  padding-left:24px;
  padding-right:24px;
}

/* ---------- header ---------- */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:80;
  height:var(--nav-h);
  background:transparent;
  transition:background-color .28s ease, box-shadow .28s ease, backdrop-filter .28s ease;
}
.site-header::after{
  content:"";
  position:absolute;left:0;right:0;bottom:0;height:1px;
  background:linear-gradient(90deg,rgba(34,211,197,0),rgba(34,211,197,.5),rgba(34,211,197,0));
  opacity:0;
  transition:opacity .28s ease;
}
.site-header.is-scrolled{
  background:rgba(10,18,32,.74);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  box-shadow:0 10px 30px rgba(0,0,0,.42);
}
.site-header.is-scrolled::after{opacity:1;}

.nav-inner{
  display:flex;
  align-items:center;
  gap:20px;
  height:100%;
}
.logo{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.logo-mark{
  width:36px;height:36px;flex:0 0 36px;
  display:flex;align-items:center;justify-content:center;
  border-radius:11px;
  background:linear-gradient(140deg,var(--primary),var(--primary-deep));
  box-shadow:0 6px 18px rgba(34,211,197,.26);
}
.logo-mark svg{width:20px;height:20px;}
.logo-text{
  display:flex;flex-direction:column;
  color:var(--t1);font-weight:700;font-size:16px;line-height:1.2;
  letter-spacing:.02em;
}
.logo-sub{font-size:11px;font-weight:400;color:var(--t3);letter-spacing:.06em;margin-top:3px;}

nav.nav-menu{flex:1 1 auto;display:flex;justify-content:center;}
nav.nav-menu ul.nav-menu{display:flex;align-items:center;gap:4px;}
.nav-link{
  position:relative;
  display:inline-block;
  padding:8px 14px;
  border-radius:8px;
  font-size:15px;
  color:var(--t2);
  transition:color .2s ease,background-color .2s ease;
}
.nav-link:hover{color:var(--t1);background:rgba(34,211,197,.08);}
.nav-link[aria-current="page"]{color:var(--t1);background:rgba(34,211,197,.1);}
.nav-link[aria-current="page"]::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;
  border-radius:2px;background:var(--primary);
}

.nav-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.icon-btn{
  width:40px;height:40px;
  display:flex;align-items:center;justify-content:center;
  border-radius:10px;
  border:1px solid var(--line);
  color:var(--t2);
  background:rgba(15,26,43,.6);
  transition:color .2s ease,border-color .2s ease,background-color .2s ease;
}
.icon-btn svg{width:19px;height:19px;}
.icon-btn:hover{color:var(--primary);border-color:var(--line-strong);background:rgba(34,211,197,.08);}
.hamburger{display:none;width:44px;height:44px;}

/* ---------- buttons ---------- */
.btn{
  position:relative;
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;
  border-radius:var(--r-btn);
  font-size:15px;font-weight:600;
  overflow:hidden;
  transition:transform .2s ease,box-shadow .2s ease,background-color .2s ease,color .2s ease,border-color .2s ease;
}
.btn-sm{padding:9px 16px;font-size:14px;}
.btn-primary{background:var(--primary);color:#05121A;box-shadow:0 6px 18px rgba(34,211,197,.2);}
.btn-primary::after{
  content:"";position:absolute;top:0;left:-60%;width:40%;height:100%;
  background:linear-gradient(90deg,rgba(255,255,255,0),rgba(255,255,255,.55),rgba(255,255,255,0));
  transform:skewX(-18deg);
  transition:left .24s ease;
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:var(--sh-glow);}
.btn-primary:hover::after{left:120%;}
.btn-primary:active{transform:translateY(1px);}
.btn-outline{
  background:transparent;color:var(--t1);
  border:1px solid rgba(34,211,197,.5);
}
.btn-outline:hover{background:rgba(34,211,197,.08);color:var(--primary);border-color:var(--line-strong);transform:translateY(-2px);}
.btn-outline:active{transform:translateY(0);}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--primary);font-size:14px;font-weight:500;
}
.link-arrow svg{width:15px;height:15px;transition:transform .2s ease;}
.link-arrow:hover svg{transform:translateX(3px);}

.eyebrow{
  display:inline-block;
  font-family:var(--font-num);
  font-size:12px;letter-spacing:.08em;
  color:var(--primary);
  padding:4px 10px;
  border:1px solid var(--line-strong);
  border-radius:6px;
  background:rgba(34,211,197,.07);
}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 10px;
  font-size:12px;
  color:var(--primary);
  background:rgba(34,211,197,.1);
  border:1px solid rgba(34,211,197,.26);
  border-radius:999px;
}

/* ---------- mobile drawer ---------- */
.mobile-drawer{
  position:fixed;inset:0;z-index:120;
  background:rgba(5,8,15,.72);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  opacity:0;visibility:hidden;
  transition:opacity .24s ease,visibility .24s ease;
}
.mobile-drawer.is-open{opacity:1;visibility:visible;}
.drawer-panel{
  height:100%;width:100%;
  max-width:420px;margin-left:auto;
  padding:22px 20px 28px;
  background:rgba(10,18,32,.92);
  border-left:1px solid var(--line);
  overflow-y:auto;
  display:flex;flex-direction:column;gap:22px;
  transform:translateX(20px);
  transition:transform .26s ease;
}
.mobile-drawer.is-open .drawer-panel{transform:translateX(0);}
.drawer-top{display:flex;align-items:center;justify-content:space-between;}
.drawer-brand{color:var(--t1);font-weight:700;font-size:16px;}
.drawer-group h3{font-size:13px;color:var(--t3);font-weight:500;letter-spacing:.08em;margin-bottom:10px;}
.drawer-group ul{display:flex;flex-direction:column;gap:4px;}
.drawer-link{
  display:block;
  padding:12px 14px;
  border-radius:10px;
  font-size:15px;
  color:var(--t2);
  border:1px solid transparent;
}
.drawer-link:hover{color:var(--t1);background:rgba(34,211,197,.08);}
.drawer-link.is-active{color:var(--t1);border-color:var(--line-strong);background:rgba(34,211,197,.1);}
.drawer-cta{width:100%;margin-top:auto;}

/* ---------- page hero ---------- */
.page-hero{
  position:relative;
  padding-top:calc(var(--nav-h) + 44px);
  padding-bottom:52px;
  min-height:264px;
  background-image:url("/assets/images/backpic/back-2.webp");
  background-size:cover;
  background-position:center right;
  overflow:hidden;
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(5,8,15,.96) 0%,rgba(5,8,15,.86) 42%,rgba(5,8,15,.58) 72%,rgba(5,8,15,.42) 100%);
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(140,175,205,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(140,175,205,.05) 1px,transparent 1px);
  background-size:64px 64px;
  opacity:.9;
  pointer-events:none;
}
.page-hero .grid-container{position:relative;z-index:2;}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:6px;font-size:13px;color:var(--t3);margin-bottom:16px;}
.breadcrumb li{display:flex;align-items:center;gap:6px;}
.breadcrumb li+li::before{content:"/";color:var(--t3);}
.breadcrumb a{color:var(--t3);}
.breadcrumb a:hover{color:var(--primary);}
.breadcrumb [aria-current="page"]{color:var(--t2);}
.page-hero h1{
  font-size:clamp(30px,4.4vw,50px);
  line-height:1.18;
  font-weight:700;
  max-width:820px;
}
.page-hero .hero-sub{
  margin-top:16px;
  max-width:680px;
  font-size:16px;
  line-height:1.85;
  color:var(--t2);
}
.hero-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px;}

/* ---------- sections ---------- */
.section{padding:var(--sec) 0;}
.section-alt{background:var(--bg-1);}
.section-head{max-width:760px;margin-bottom:36px;}
.section-head h2{font-size:clamp(24px,3vw,34px);line-height:1.3;margin-top:14px;}
.section-lead{margin-top:14px;font-size:16px;line-height:1.9;color:var(--t2);}
.section-head--row{
  max-width:none;
  display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;
}

/* ---------- prepare ---------- */
.prepare-panel{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  clip-path:polygon(14px 0,100% 0,100% calc(100% - 14px),calc(100% - 14px) 100%,0 100%,0 14px);
  padding:34px;
}
.prepare-grid{display:grid;grid-template-columns:1fr 1fr;gap:34px;}
.prepare-intro h2{font-size:clamp(22px,2.6vw,30px);line-height:1.35;margin-bottom:14px;}
.prepare-intro p{font-size:15px;line-height:1.9;color:var(--t2);}
.prepare-list{display:flex;flex-direction:column;}
.prepare-item{
  display:flex;gap:14px;
  padding:18px 0;
  border-top:1px solid var(--line);
}
.prepare-item:first-child{border-top:0;padding-top:0;}
.prepare-item .check{
  flex:0 0 26px;width:26px;height:26px;margin-top:3px;
  display:flex;align-items:center;justify-content:center;
  border-radius:8px;
  border:1px solid rgba(34,211,197,.35);
  background:rgba(34,211,197,.08);
  color:var(--primary);
}
.prepare-item .check svg{width:14px;height:14px;}
.prepare-item h3{font-size:17px;font-weight:600;margin-bottom:4px;}
.prepare-item p{font-size:14px;line-height:1.85;color:var(--t2);}

/* ---------- step flow ---------- */
.step-flow{display:flex;flex-direction:column;}
.step-row{
  display:flex;
  align-items:center;
  gap:44px;
  padding:46px 0;
  border-top:1px solid var(--line);
}
.step-row:first-child{border-top:0;padding-top:0;}
.step-media{flex:0 0 48%;max-width:48%;}
.step-body{flex:1 1 auto;}
.step-row.reverse{flex-direction:row-reverse;}
.step-media img{
  width:100%;
  aspect-ratio:16/9;
  object-fit:cover;
  object-position:center;
  border-radius:var(--r-img);
  border:1px solid var(--line);
  box-shadow:var(--sh-1);
  transition:transform .26s ease,box-shadow .26s ease,border-color .26s ease;
}
.step-row:hover .step-media img{transform:scale(1.02);border-color:var(--line-strong);box-shadow:var(--sh-2);}
.step-row:nth-child(2n) .step-media img{object-position:center 35%;}
.step-row:nth-child(3n) .step-media img{object-position:30% center;}
.step-head{display:flex;align-items:center;gap:12px;margin-bottom:14px;}
.step-num{
  font-family:var(--font-num);
  font-variant-numeric:tabular-nums;
  font-size:30px;
  font-weight:700;
  line-height:1;
  color:var(--primary);
}
.step-line{width:34px;height:3px;border-radius:2px;background:var(--primary);}
.step-tag{font-size:12px;letter-spacing:.08em;color:var(--t3);}
.step-body h3{font-size:22px;line-height:1.45;font-weight:600;margin-bottom:12px;}
.step-body p{font-size:15.5px;line-height:1.9;color:var(--t2);}
.step-tip{
  margin-top:14px;
  display:flex;gap:8px;
  font-size:14px;
  color:var(--warn);
  padding-left:0;
}
.step-tip::before{
  content:"";flex:0 0 3px;width:3px;border-radius:2px;
  background:var(--warn);opacity:.7;
}

/* ---------- faq ---------- */
.faq-wrap{max-width:900px;}
.faq-list{margin:0;background:transparent;border-top:1px solid var(--line);list-style:none;}
.faq-item{border-bottom:1px solid var(--line);background:transparent;}
.faq-title{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  width:100%;
  padding:20px 4px;
  border:0;
  background:transparent;
  text-align:left;
  font-size:16px;
  font-weight:500;
  line-height:1.7;
  color:var(--t1);
  transition:color .2s ease;
}
.faq-title:hover{color:var(--primary);}
.faq-arrow{
  flex:0 0 auto;width:18px;height:18px;color:var(--primary);
  transition:transform .2s ease;
}
.faq-item.is-active .faq-arrow{transform:rotate(180deg);}
.faq-panel{
  display:block;
  max-height:0;
  overflow:hidden;
  padding:0;
  border:0;
  background:transparent;
  color:var(--t2);
  transition:max-height .26s ease;
}
.faq-panel-inner{padding:0 4px 22px;font-size:15px;line-height:1.85;color:var(--t2);}

/* ---------- cta ---------- */
.cta-panel{
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
  padding:38px 36px;
  border:1px solid var(--line-strong);
  border-radius:var(--r-card);
  background:linear-gradient(120deg,var(--panel-2),var(--panel));
  clip-path:polygon(14px 0,100% 0,100% calc(100% - 14px),calc(100% - 14px) 100%,0 100%,0 14px);
}
.cta-panel h2{font-size:clamp(20px,2.4vw,28px);line-height:1.35;}
.cta-panel p{margin-top:10px;font-size:15px;line-height:1.85;color:var(--t2);max-width:560px;}
.cta-actions{display:flex;align-items:center;gap:18px;flex-wrap:wrap;}

/* ---------- footer ---------- */
.site-footer{
  position:relative;
  background:var(--bg-0);
  border-top:1px solid var(--line);
  padding:64px 0 0;
}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,rgba(34,211,197,0),rgba(34,211,197,.55),rgba(34,211,197,0));
}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:34px;}
.footer-col h4{font-size:14px;color:var(--t1);font-weight:600;margin-bottom:16px;letter-spacing:.04em;}
.footer-col p{font-size:14px;line-height:1.85;color:var(--t3);max-width:360px;}
.footer-brand{display:inline-flex;align-items:center;gap:10px;color:var(--t1);font-weight:700;font-size:16px;margin-bottom:14px;}
.footer-brand .logo-mark{width:32px;height:32px;flex:0 0 32px;border-radius:10px;}
.footer-brand .logo-mark svg{width:18px;height:18px;}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col ul a{font-size:14px;color:var(--t3);display:inline-block;transition:color .2s ease,transform .2s ease;}
.footer-col ul a:hover{color:var(--primary);transform:translateX(2px);}
.footer-bottom{
  margin-top:52px;
  padding:22px 0 28px;
  border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;
  font-size:13px;color:var(--t3);
}
.to-top{display:inline-flex;align-items:center;gap:6px;color:var(--t2);font-size:13px;}
.to-top:hover{color:var(--primary);}

/* ---------- responsive ---------- */
@media screen and (min-width:1600px){
  .grid-container{max-width:1320px;}
}
@media screen and (max-width:1023px){
  :root{--sec:72px;--nav-h:64px;}
  nav.nav-menu{display:none;}
  .hamburger{display:flex;}
  .nav-actions .btn-primary{display:none;}
  .step-row{flex-direction:column;align-items:flex-start;gap:22px;padding:38px 0;}
  .step-row.reverse{flex-direction:column;}
  .step-media{flex:1 1 auto;max-width:100%;width:100%;}
  .prepare-grid{grid-template-columns:1fr;gap:26px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px;}
}
@media screen and (max-width:767px){
  :root{--sec:48px;--nav-h:56px;}
  .grid-container{padding-left:20px;padding-right:20px;}
  .logo-sub{display:none;}
  .logo-text{font-size:15px;}
  .page-hero{padding-top:calc(var(--nav-h) + 30px);padding-bottom:38px;min-height:220px;}
  .page-hero .hero-sub{font-size:15px;}
  .prepare-panel{padding:24px 20px;}
  .step-num{font-size:26px;}
  .step-body h3{font-size:20px;}
  .faq-title{font-size:15.5px;padding:18px 2px;}
  .cta-panel{padding:26px 20px;}
  .footer-grid{grid-template-columns:1fr;gap:26px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media screen and (max-width:520px){
  .icon-btn.search-btn{display:none;}
  .hero-meta{gap:8px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{width:100%;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;scroll-behavior:auto !important;}
}

/* roulang page: category1 */
:root{
  --bg-0:#05080F;
  --bg-1:#0A1220;
  --panel:#0F1A2B;
  --panel-2:#142236;
  --primary:#22D3C5;
  --primary-deep:#0E8F87;
  --accent:#FFB05C;
  --t1:#EAF2FA;
  --t2:#A7B6C9;
  --t3:#6F8098;
  --line:rgba(140,175,205,.14);
  --line-strong:rgba(34,211,197,.42);
  --success:#34D399;
  --warn:#FFB05C;
  --danger:#FF6B6B;
  --glass:rgba(20,34,54,.55);
  --r-card:16px;
  --r-img:12px;
  --r-btn:10px;
  --sh-1:0 2px 10px rgba(0,0,0,.35);
  --sh-2:0 18px 40px rgba(0,0,0,.45);
  --sh-glow:0 8px 28px rgba(34,211,197,.28);
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei UI","Source Han Sans SC","Noto Sans SC",sans-serif;
  --font-num:"Inter","SF Pro Display","Segoe UI",sans-serif;
  --nav-h:68px;
}

*,*::before,*::after{box-sizing:border-box;}

html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}

body{
  margin:0;
  background:var(--bg-0);
  color:var(--t2);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.9;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}

h1,h2,h3,h4{
  font-family:var(--font-cn);
  color:var(--t1);
  margin:0;
  font-weight:700;
  letter-spacing:.01em;
}

h1{font-size:clamp(30px,4.4vw,52px);line-height:1.18;}
h2{font-size:clamp(24px,3vw,36px);line-height:1.3;}
h3{font-size:20px;line-height:1.45;font-weight:600;}
h4{font-size:16px;line-height:1.5;font-weight:600;}

p{margin:0 0 18px;}
p:last-child{margin-bottom:0;}

a{color:var(--t1);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--primary);}

img{max-width:100%;height:auto;display:block;}
ul,ol{margin:0;padding:0;}
li{list-style:none;}

button{font-family:inherit;cursor:pointer;}

:focus-visible{outline:2px solid var(--primary);outline-offset:2px;}

::selection{background:rgba(34,211,197,.28);color:#fff;}

.skip-link{
  position:absolute;left:-9999px;top:0;z-index:200;
  background:var(--primary);color:#05121A;padding:10px 16px;border-radius:var(--r-btn);
}
.skip-link:focus{left:16px;top:12px;}

/* ============ 容器 ============ */
.grid-container{
  width:100%;
  max-width:1240px !important;
  margin:0 auto;
  padding-left:24px;
  padding-right:24px;
}

.section{padding-top:96px;}
.section-sm{padding-top:72px;}

.section-head{max-width:760px;margin-bottom:32px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-num);
  font-size:12px;letter-spacing:.08em;color:var(--primary);
  text-transform:uppercase;
  margin-bottom:14px;
}
.eyebrow::before{
  content:"";width:22px;height:2px;background:var(--primary);border-radius:2px;
}
.lead{color:var(--t2);font-size:16px;line-height:1.9;max-width:720px;}

/* ============ 导航 ============ */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:120;
  background:transparent;
  transition:background .28s ease, box-shadow .28s ease, backdrop-filter .28s ease;
}
.site-header::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(34,211,197,.45),transparent);
  opacity:0;transition:opacity .28s ease;
}
.site-header.is-scrolled{
  background:rgba(8,14,24,.72);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  box-shadow:0 10px 30px rgba(0,0,0,.35);
}
.site-header.is-scrolled::after{opacity:1;}

.nav-inner{
  height:var(--nav-h);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
}

.logo{
  display:inline-flex;align-items:center;gap:10px;
  color:var(--t1);flex-shrink:0;
}
.logo:hover{color:var(--t1);}
.logo-mark{
  width:34px;height:34px;border-radius:10px;
  display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(150deg,var(--primary),var(--primary-deep));
  box-shadow:0 6px 18px rgba(34,211,197,.22);
  flex-shrink:0;
}
.logo-mark svg{width:20px;height:20px;}
.logo-text{
  font-size:17px;font-weight:700;letter-spacing:.01em;line-height:1.15;
  display:flex;flex-direction:column;
}
.logo-sub{
  font-size:11px;font-weight:400;color:var(--t3);letter-spacing:.04em;margin-top:2px;
}

.nav-menu{display:flex;align-items:center;}
ul.nav-menu{gap:6px;margin:0;padding:0;}
.nav-link{
  display:inline-flex;align-items:center;
  height:40px;padding:0 14px;border-radius:var(--r-btn);
  font-size:14.5px;color:var(--t2);
  position:relative;
  white-space:nowrap;
}
.nav-link:hover{color:var(--t1);background:rgba(34,211,197,.08);}
.nav-link[aria-current="page"]{color:var(--t1);font-weight:600;}
.nav-link[aria-current="page"]::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;
  background:var(--primary);border-radius:2px;
}

.nav-actions{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.icon-btn{
  width:40px;height:40px;border-radius:var(--r-btn);
  border:1px solid var(--line);
  background:transparent;color:var(--t2);
  display:inline-flex;align-items:center;justify-content:center;
  transition:border-color .2s ease,color .2s ease,background .2s ease;
}
.icon-btn:hover{color:var(--primary);border-color:var(--line-strong);background:rgba(34,211,197,.08);}
.icon-btn svg{width:19px;height:19px;}
.hamburger{
  width:44px;height:44px;display:none;
}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;letter-spacing:.01em;
  border:1px solid transparent;background:transparent;
  position:relative;overflow:hidden;
  transition:transform .2s ease, box-shadow .2s ease, background .2s ease, color .2s ease, border-color .2s ease;
}
.btn-sm{height:40px;padding:0 18px;font-size:14px;}

.btn-primary{
  background:var(--primary);color:#05121A;font-weight:600;
  box-shadow:0 6px 20px rgba(34,211,197,.18);
}
.btn-primary::after{
  content:"";position:absolute;top:0;left:-120%;width:60%;height:100%;
  background:linear-gradient(100deg,transparent,rgba(255,255,255,.42),transparent);
  transition:left .24s ease;
}
.btn-primary:hover{color:#05121A;transform:translateY(-2px);box-shadow:var(--sh-glow);}
.btn-primary:hover::after{left:130%;}
.btn-primary:active{transform:translateY(1px);}

.btn-ghost{
  border-color:rgba(34,211,197,.5);color:var(--t1);
}
.btn-ghost:hover{
  color:var(--primary);background:rgba(34,211,197,.08);border-color:var(--line-strong);
  transform:translateY(-2px);
}
.btn-ghost:active{transform:translateY(1px);}

.btn-accent{
  background:var(--accent);color:#231402;font-weight:600;
  box-shadow:0 6px 20px rgba(255,176,92,.2);
}
.btn-accent:hover{color:#231402;transform:translateY(-2px);box-shadow:0 10px 30px rgba(255,176,92,.28);}

.text-link{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;color:var(--t2);
  border-bottom:1px solid rgba(34,211,197,.35);
  padding-bottom:2px;
}
.text-link:hover{color:var(--primary);border-color:var(--primary);}

/* ============ 分类页小 Hero ============ */
.cat-hero{
  position:relative;
  padding-top:calc(var(--nav-h) + 32px);
  padding-bottom:56px;
  background-image:linear-gradient(90deg,rgba(5,8,15,.94) 0%,rgba(5,8,15,.78) 45%,rgba(5,8,15,.55) 100%),url('/assets/images/backpic/back-1.png');
  background-size:cover;
  background-position:center right;
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.cat-hero::before{
  content:"";position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(140,175,205,.055) 1px,transparent 1px),
    linear-gradient(90deg,rgba(140,175,205,.055) 1px,transparent 1px);
  background-size:56px 56px;
  pointer-events:none;
}
.cat-hero .grid-container{position:relative;z-index:2;}

.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--t3);margin-bottom:22px;
}
.breadcrumb li{display:inline-flex;align-items:center;gap:8px;}
.breadcrumb li+li::before{content:"/";color:var(--t3);opacity:.7;}
.breadcrumb a{color:var(--t2);}
.breadcrumb a:hover{color:var(--primary);}
.breadcrumb [aria-current="page"]{color:var(--t3);}

.cat-hero h1{max-width:820px;}
.cat-hero-sub{
  margin-top:18px;max-width:640px;color:var(--t2);font-size:16.5px;line-height:1.85;
}
.hero-tags{
  display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;
}
.tag{
  display:inline-flex;align-items:center;
  height:30px;padding:0 12px;border-radius:999px;
  border:1px solid var(--line);
  font-size:12.5px;color:var(--t2);letter-spacing:.04em;
  background:rgba(20,34,54,.4);
}
.tag.is-on{border-color:var(--line-strong);color:var(--primary);}

/* ============ 目录 + 条目区 ============ */
.layout{
  display:grid;
  grid-template-columns:250px 1fr;
  gap:56px;
  align-items:start;
}

.toc{position:sticky;top:96px;}
.toc-title{
  font-size:12px;letter-spacing:.08em;color:var(--t3);
  text-transform:uppercase;font-family:var(--font-num);
  margin-bottom:14px;
}
.toc-list{border-left:1px solid var(--line);}
.toc-link{
  display:block;position:relative;
  padding:9px 0 9px 16px;
  font-size:14px;color:var(--t2);line-height:1.5;
}
.toc-link::before{
  content:"";position:absolute;left:-1px;top:9px;bottom:9px;width:2px;
  background:var(--primary);opacity:0;transition:opacity .2s ease;
}
.toc-link:hover{color:var(--t1);}
.toc-link.is-active{color:var(--primary);}
.toc-link.is-active::before{opacity:1;}

.toc-cta{
  margin-top:24px;padding:18px;border-radius:var(--r-card);
  border:1px solid var(--line);background:var(--panel);
}
.toc-cta p{font-size:13.5px;color:var(--t2);line-height:1.75;margin-bottom:14px;}

.figure{
  margin:0 0 44px;
  border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;
  background:var(--panel);
}
.figure img{
  width:100%;height:auto;border-radius:0;object-fit:cover;object-position:center 30%;
  aspect-ratio:16/8;
}
.figure figcaption{
  padding:14px 18px;font-size:13px;color:var(--t3);line-height:1.7;
  border-top:1px solid var(--line);
}

.entry-group{padding-top:8px;margin-bottom:56px;}
.entry-group:last-child{margin-bottom:0;}
.entry-group > h2{
  display:flex;align-items:baseline;gap:12px;
  padding-bottom:16px;
}
.entry-group > h2 .idx{
  font-family:var(--font-num);font-size:14px;color:var(--primary);
  font-variant-numeric:tabular-nums;letter-spacing:.06em;
}
.entry-lead{
  color:var(--t2);font-size:15.5px;line-height:1.85;margin:-6px 0 22px;
}

.entry-item{
  padding:24px 0;
  border-top:1px solid var(--line);
}
.entry-item:last-child{border-bottom:1px solid var(--line);}
.entry-item h3{margin-bottom:10px;}
.entry-desc{color:var(--t2);font-size:15px;line-height:1.9;margin-bottom:14px;}

.points{display:grid;gap:9px;}
.points li{
  position:relative;padding-left:18px;
  font-size:14.5px;color:var(--t2);line-height:1.8;
}
.points li::before{
  content:"";position:absolute;left:0;top:10px;
  width:7px;height:7px;border-radius:2px;
  background:var(--primary);opacity:.85;transform:rotate(45deg);
}

/* ============ FAQ ============ */
.faq-wrap{max-width:900px;}
.accordion{
  border-top:1px solid var(--line);
  background:transparent;
  list-style:none;
  margin:0;
}
.accordion-item{
  border-bottom:1px solid var(--line) !important;
  background:transparent !important;
}
.accordion-title{
  display:flex !important;align-items:center;justify-content:space-between;gap:16px;
  padding:22px 4px !important;
  font-size:16px;font-weight:500;color:var(--t1) !important;
  background:transparent !important;
  border:0 !important;
  line-height:1.6;
  transition:color .2s ease;
}
.accordion-title:hover{color:var(--primary) !important;}
.accordion-title::before{
  content:"" !important;
  width:9px;height:9px;flex-shrink:0;
  border-right:2px solid var(--primary);
  border-bottom:2px solid var(--primary);
  transform:rotate(45deg);
  transition:transform .2s ease;
  order:2;margin-left:auto;
}
.accordion-item.is-open .accordion-title::before{transform:rotate(225deg);}
.accordion-title .q-num{
  font-family:var(--font-num);font-size:13px;color:var(--primary);
  font-variant-numeric:tabular-nums;margin-right:10px;
}
.accordion-content{
  display:block;
  padding:0 4px 24px 4px !important;
  border:0 !important;
  background:transparent !important;
  color:var(--t2) !important;
  font-size:15px;line-height:1.85;
}
.accordion-content[hidden]{display:none;}

/* ============ CTA 面板 ============ */
.cta-panel{
  position:relative;
  border:1px solid var(--line);
  border-radius:var(--r-card);
  background:linear-gradient(135deg,var(--panel) 0%,var(--panel-2) 100%);
  padding:44px 40px;
  display:grid;
  grid-template-columns:1fr auto;
  gap:28px;
  align-items:center;
  overflow:hidden;
}
.cta-panel::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,rgba(34,211,197,.6),transparent);
}
.cta-panel h2{margin-bottom:12px;}
.cta-panel p{color:var(--t2);font-size:15px;max-width:560px;}
.cta-actions{display:flex;flex-direction:column;gap:14px;align-items:flex-start;}

/* ============ 页脚 ============ */
.site-footer{
  margin-top:96px;
  background:var(--bg-0);
  border-top:1px solid var(--line);
  position:relative;
  padding-top:64px;
}
.site-footer::before{
  content:"";position:absolute;top:-1px;left:0;right:0;height:1px;
  background:linear-gradient(90deg,rgba(34,211,197,.5),transparent);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1fr;
  gap:40px;
  padding-bottom:48px;
}
.footer-brand{
  display:inline-flex;align-items:center;gap:10px;
  font-size:16px;font-weight:700;color:var(--t1);margin-bottom:16px;
}
.footer-brand .logo-mark{width:30px;height:30px;border-radius:9px;}
.footer-col p{font-size:14px;color:var(--t3);line-height:1.8;margin:0;max-width:340px;}
.footer-col h4{
  font-size:13px;color:var(--t1);letter-spacing:.06em;margin-bottom:16px;
}
.footer-col ul{display:grid;gap:11px;}
.footer-col ul a{
  font-size:14px;color:var(--t2);display:inline-block;
  transition:color .2s ease,transform .2s ease;
}
.footer-col ul a:hover{color:var(--primary);transform:translateX(2px);}

.footer-bottom{
  border-top:1px solid var(--line);
  padding:22px 0 28px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--t3);
}
.to-top{
  display:inline-flex;align-items:center;gap:8px;
  color:var(--t2);font-size:13px;
  border:1px solid var(--line);border-radius:var(--r-btn);
  padding:9px 14px;
}
.to-top:hover{color:var(--primary);border-color:var(--line-strong);}

/* ============ 移动端抽屉 ============ */
.drawer{
  position:fixed;inset:0;z-index:200;
  background:rgba(5,8,15,.94);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  transform:translateY(-100%);
  visibility:hidden;
  transition:transform .28s ease, visibility .28s ease;
  overflow-y:auto;
}
.drawer.is-open{transform:translateY(0);visibility:visible;}
.drawer-inner{padding:0 20px 40px;}
.drawer-top{
  height:56px;display:flex;align-items:center;justify-content:space-between;
}
.drawer-close{
  width:44px;height:44px;border-radius:var(--r-btn);
  border:1px solid var(--line);background:transparent;color:var(--t2);
  display:inline-flex;align-items:center;justify-content:center;
}
.drawer-close:hover{color:var(--primary);border-color:var(--line-strong);}
.drawer-group{margin-top:26px;}
.drawer-group h4{font-size:12px;letter-spacing:.08em;color:var(--t3);margin-bottom:12px;font-family:var(--font-num);}
.drawer-group a{
  display:flex;align-items:center;
  min-height:48px;padding:0 14px;border-radius:var(--r-btn);
  color:var(--t1);font-size:16px;
  border:1px solid transparent;
}
.drawer-group a:hover,.drawer-group a[aria-current="page"]{
  border-color:var(--line-strong);background:rgba(34,211,197,.08);color:var(--primary);
}
.drawer-cta{margin-top:32px;}
.drawer-cta .btn{width:100%;}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .layout{grid-template-columns:220px 1fr;gap:40px;}
}

@media (max-width:1023px){
  .section{padding-top:72px;}
  .site-footer{margin-top:72px;}
  .layout{grid-template-columns:1fr;gap:0;}
  .toc{position:static;margin-bottom:32px;}
  .toc-list{
    display:flex;flex-wrap:wrap;gap:10px;border-left:0;
    border-top:1px solid var(--line);border-bottom:1px solid var(--line);
    padding:14px 0;
  }
  .toc-link{
    padding:8px 12px;border-radius:999px;border:1px solid var(--line);
    font-size:13.5px;
  }
  .toc-link::before{display:none;}
  .toc-link.is-active{border-color:var(--line-strong);background:rgba(34,211,197,.08);}
  .toc-cta{display:none;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}

@media (max-width:960px){
  :root{--nav-h:56px;}
  .nav-menu{display:none;}
  .hamburger{display:inline-flex;}
  .search-btn{display:none;}
  .nav-actions .btn-sm{display:none;}
  .logo-text{font-size:15.5px;}
  .logo-sub{display:none;}
  .cat-hero{padding-top:calc(var(--nav-h) + 28px);padding-bottom:44px;}
  .cat-hero-sub{font-size:15.5px;}
}

@media (max-width:767px){
  .grid-container{padding-left:20px;padding-right:20px;}
  .section{padding-top:48px;}
  .section-head{margin-bottom:24px;}
  .site-footer{margin-top:48px;padding-top:48px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:32px;}
  .cta-panel{grid-template-columns:1fr;padding:28px 22px;gap:20px;}
  .cta-actions{flex-direction:row;flex-wrap:wrap;align-items:center;}
  .entry-item{padding:20px 0;}
  .accordion-title{font-size:15px;padding:18px 2px !important;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}

@media (max-width:520px){
  h1{font-size:29px;}
  .hero-tags{gap:8px;}
  .tag{font-size:12px;height:28px;padding:0 10px;}
  .cta-actions .btn{width:100%;}
  .figure img{aspect-ratio:16/10;}
}

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

/* roulang page: category3 */
/* ============ 设计变量 ============ */
:root{
  --bg-0:#05080F;
  --bg-1:#0A1220;
  --panel:#0F1A2B;
  --panel-2:#142236;
  --primary:#22D3C5;
  --primary-deep:#0E8F87;
  --accent:#FFB05C;
  --t1:#EAF2FA;
  --t2:#A7B6C9;
  --t3:#6F8098;
  --line:rgba(140,175,205,.14);
  --line-strong:rgba(34,211,197,.42);
  --glass:rgba(20,34,54,.55);
  --success:#34D399;
  --warn:#FFB05C;
  --danger:#FF6B6B;
  --r-card:16px;
  --r-img:12px;
  --r-btn:10px;
  --sh-1:0 2px 10px rgba(0,0,0,.35);
  --sh-2:0 18px 40px rgba(0,0,0,.45);
  --sh-glow:0 8px 28px rgba(34,211,197,.28);
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei UI","Source Han Sans SC","Noto Sans SC",sans-serif;
  --font-num:"Inter","SF Pro Display","Segoe UI",sans-serif;
  --nav-h:68px;
  --sec-y:96px;
}

/* ============ 基础 reset ============ */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--t2);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.9;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding:0;list-style:none;}
a{color:inherit;text-decoration:none;transition:color .22s ease,border-color .22s ease,background-color .22s ease,transform .22s ease;}
a:hover{color:var(--primary);}
img{max-width:100%;display:block;height:auto;}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit;}
input,textarea,select{font-family:inherit;font-size:15px;}
table{border-collapse:collapse;width:100%;}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;}
::selection{background:rgba(34,211,197,.28);color:#fff;}

/* ============ 容器 ============ */
.grid-container{
  max-width:1240px;
  padding-left:24px;
  padding-right:24px;
  margin-left:auto;
  margin-right:auto;
  width:100%;
}
.section{padding-top:var(--sec-y);padding-bottom:var(--sec-y);}
.section--tight{padding-top:calc(var(--sec-y) * .72);padding-bottom:calc(var(--sec-y) * .72);}
.section-title-block{margin-bottom:32px;max-width:760px;}
.eyebrow{
  display:inline-block;
  font-size:12px;
  letter-spacing:.08em;
  color:var(--primary);
  border:1px solid var(--line-strong);
  border-radius:6px;
  padding:4px 10px;
  margin-bottom:16px;
}
h1{
  font-size:clamp(30px,4.4vw,52px);
  line-height:1.18;
  font-weight:700;
  color:var(--t1);
  letter-spacing:-.01em;
}
h2{
  font-size:clamp(24px,3vw,36px);
  line-height:1.3;
  font-weight:700;
  color:var(--t1);
}
h3{
  font-size:20px;
  line-height:1.45;
  font-weight:600;
  color:var(--t1);
}
h4{
  font-size:15px;
  font-weight:600;
  color:var(--t1);
  letter-spacing:.04em;
}
.lead{font-size:16px;line-height:1.9;color:var(--t2);margin-top:16px;max-width:720px;}
.muted{color:var(--t3);font-size:14px;line-height:1.75;}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:13px 24px;
  border-radius:var(--r-btn);
  font-size:15px;
  font-weight:600;
  line-height:1;
  position:relative;
  overflow:hidden;
  transition:transform .2s ease,box-shadow .22s ease,background-color .22s ease,color .22s ease,border-color .22s ease;
  white-space:nowrap;
}
.btn-sm{padding:10px 18px;font-size:14px;}
.btn-primary{
  background:var(--primary);
  color:#05121A;
  box-shadow:0 6px 20px rgba(34,211,197,.22);
}
.btn-primary::after{
  content:"";
  position:absolute;
  top:0;left:-140%;
  width:60%;height:100%;
  background:linear-gradient(100deg,transparent,rgba(255,255,255,.55),transparent);
  transition:left .28s ease;
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:var(--sh-glow);color:#05121A;}
.btn-primary:hover::after{left:140%;}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{
  background:transparent;
  color:var(--t1);
  border:1px solid rgba(34,211,197,.5);
}
.btn-ghost:hover{
  background:rgba(34,211,197,.08);
  color:var(--primary);
  border-color:var(--primary);
  transform:translateY(-2px);
}
.btn-ghost:active{transform:translateY(1px);}
.btn-accent{
  background:var(--accent);
  color:#20130A;
  box-shadow:0 8px 24px rgba(255,176,92,.24);
}
.text-link{
  display:inline-flex;
  align-items:center;
  gap:6px;
  color:var(--primary);
  font-size:14px;
  border-bottom:1px solid rgba(34,211,197,.35);
  padding-bottom:2px;
}
.text-link:hover{color:#7FF0E6;border-color:#7FF0E6;}

/* ============ 导航 ============ */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:60;
  height:var(--nav-h);
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background-color .28s ease,backdrop-filter .28s ease,border-color .28s ease,box-shadow .28s ease;
}
.site-header.is-scrolled{
  background:rgba(10,18,32,.78);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid transparent;
  box-shadow:0 12px 30px rgba(0,0,0,.4);
  position:sticky;
  top:0;
}
.site-header.is-scrolled::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(34,211,197,.55),transparent);
}
.nav-inner{
  height:var(--nav-h);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
}
.logo{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
}
.logo-mark{
  width:34px;height:34px;
  border-radius:9px;
  background:linear-gradient(150deg,var(--primary),var(--primary-deep));
  display:inline-flex;
  align-items:center;
  justify-content:center;
  box-shadow:0 6px 16px rgba(34,211,197,.25);
}
.logo-mark svg{width:20px;height:20px;}
.logo-text{
  display:inline-flex;
  flex-direction:column;
  font-size:16px;
  font-weight:700;
  color:var(--t1);
  line-height:1.2;
  letter-spacing:.01em;
}
.logo-sub{
  font-size:11px;
  font-weight:400;
  color:var(--t3);
  letter-spacing:.06em;
  margin-top:3px;
}
nav.nav-menu{display:flex;align-items:center;}
ul.nav-menu{
  display:flex;
  align-items:center;
  gap:4px;
  margin:0;
}
.nav-link{
  display:inline-block;
  position:relative;
  padding:10px 14px;
  font-size:15px;
  color:var(--t2);
  border-radius:8px;
}
.nav-link:hover{color:var(--t1);background:rgba(34,211,197,.06);}
.nav-link[aria-current="page"]{color:var(--t1);font-weight:600;}
.nav-link[aria-current="page"]::after{
  content:"";
  position:absolute;
  left:14px;right:14px;bottom:2px;
  height:2px;
  background:var(--primary);
  border-radius:2px;
}
.nav-actions{display:flex;align-items:center;gap:10px;}
.icon-btn{
  width:44px;height:44px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border-radius:10px;
  border:1px solid var(--line);
  color:var(--t2);
  background:rgba(15,26,43,.5);
  transition:color .2s ease,border-color .2s ease,background-color .2s ease;
}
.icon-btn:hover{color:var(--primary);border-color:var(--line-strong);}
.icon-btn svg{width:20px;height:20px;}
.hamburger{display:none;}
@media (max-width:960px){
  .hamburger{display:inline-flex;}
  nav.nav-menu{display:none;}
  .search-btn{display:none;}
}

/* ============ 移动端抽屉 ============ */
.drawer{
  position:fixed;
  inset:0;
  z-index:80;
  background:rgba(5,8,15,.9);
  -webkit-backdrop-filter:blur(16px);
  backdrop-filter:blur(16px);
  display:none;
  flex-direction:column;
  padding:24px 20px 32px;
}
.drawer.is-open{display:flex;}
.drawer-head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  margin-bottom:28px;
}
.drawer-group{margin-bottom:26px;}
.drawer-group h4{color:var(--t3);font-size:12px;letter-spacing:.1em;margin-bottom:10px;}
.drawer-group a{
  display:block;
  padding:14px 4px;
  font-size:17px;
  color:var(--t1);
  border-bottom:1px solid var(--line);
}
.drawer-group a:hover{color:var(--primary);}
.drawer-foot{margin-top:auto;}

/* ============ 英雄区 ============ */
.page-hero{
  position:relative;
  min-height:280px;
  padding-top:calc(var(--nav-h) + 42px);
  padding-bottom:52px;
  overflow:hidden;
  border-bottom:1px solid var(--line);
}
.page-hero__bg{
  position:absolute;
  inset:0;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;
  background-position:38% 42%;
  opacity:.5;
}
.page-hero__mask{
  position:absolute;
  inset:0;
  background:
    linear-gradient(90deg,rgba(5,8,15,.94) 0%,rgba(5,8,15,.72) 46%,rgba(5,8,15,.35) 100%),
    linear-gradient(180deg,rgba(5,8,15,.55),rgba(5,8,15,.96));
}
.page-hero__grid{
  position:absolute;
  inset:0;
  background-image:linear-gradient(rgba(140,175,205,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(140,175,205,.06) 1px,transparent 1px);
  background-size:64px 64px;
  opacity:.55;
}
.page-hero .grid-container{position:relative;z-index:2;}
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--t3);
  margin-bottom:18px;
  list-style:none;
}
.breadcrumb li{display:inline-flex;align-items:center;gap:8px;}
.breadcrumb li+li::before{content:"/";color:var(--t3);opacity:.7;}
.breadcrumb a{color:var(--t2);}
.breadcrumb a:hover{color:var(--primary);}
.breadcrumb [aria-current="page"]{color:var(--t1);}
.page-hero h1{max-width:840px;}
.page-hero .lead{max-width:660px;color:var(--t2);}

.tag-row{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:28px;
}
.tag{
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:8px 14px;
  border:1px solid var(--line);
  border-radius:8px;
  font-size:13px;
  color:var(--t2);
  background:rgba(15,26,43,.6);
  transition:border-color .2s ease,color .2s ease,transform .2s ease;
}
.tag:hover{border-color:var(--line-strong);color:var(--t1);transform:translateY(-2px);}
.tag i{
  width:6px;height:6px;
  border-radius:50%;
  background:var(--primary);
  display:inline-block;
}

/* ============ 分组标题 ============ */
.group-head{
  display:flex;
  align-items:flex-start;
  gap:16px;
  margin-bottom:8px;
}
.group-index{
  font-family:var(--font-num);
  font-variant-numeric:tabular-nums;
  font-size:14px;
  font-weight:700;
  color:var(--primary);
  border:1px solid var(--line-strong);
  border-radius:8px;
  padding:6px 10px;
  line-height:1;
  margin-top:6px;
}
.group-desc{color:var(--t3);font-size:14px;line-height:1.8;margin-bottom:22px;max-width:680px;}

/* ============ FAQ 折叠 ============ */
.faq-panel{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:8px 22px;
  box-shadow:var(--sh-1);
}
.faq-panel .accordion{
  background:transparent;
  border:0;
  margin:0;
}
.faq-panel .accordion-item{
  border-bottom:1px solid var(--line);
}
.faq-panel .accordion-item:last-child{border-bottom:0;}
.faq-panel .accordion-title{
  border:0;
  padding:20px 40px 20px 0;
  font-size:16px;
  font-weight:500;
  color:var(--t1);
  line-height:1.7;
  position:relative;
  background:transparent;
  transition:color .2s ease;
}
.faq-panel .accordion-title:hover,
.faq-panel .accordion-title:focus{color:var(--primary);}
.faq-panel .accordion-title::before{
  content:"";
  position:absolute;
  right:14px;
  top:50%;
  width:8px;height:8px;
  border-right:2px solid var(--primary);
  border-bottom:2px solid var(--primary);
  transform:translateY(-70%) rotate(45deg);
  transition:transform .2s ease;
}
.faq-panel .accordion-item.is-active .accordion-title::before{
  transform:translateY(-30%) rotate(-135deg);
}
.faq-panel .accordion-content{
  border:0;
  background:transparent;
  padding:0 40px 22px 0;
  color:var(--t2);
  font-size:15px;
  line-height:1.85;
}
.faq-panel .accordion-content p{margin-bottom:12px;}
.faq-panel .accordion-content p:last-child{margin-bottom:0;}
.faq-panel .accordion-content ul{margin:8px 0 12px;}
.faq-panel .accordion-content li{
  position:relative;
  padding-left:16px;
  margin-bottom:6px;
  font-size:15px;
  line-height:1.85;
}
.faq-panel .accordion-content li::before{
  content:"";
  position:absolute;
  left:0;top:12px;
  width:6px;height:2px;
  background:var(--primary);
}
.faq-panel .accordion-content strong{color:var(--t1);font-weight:600;}

/* ============ 现象对照 ============ */
.checker{
  background:var(--bg-1);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.checker-grid{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1.25fr);
  gap:48px;
  align-items:start;
}
.checker-figure{
  border-radius:var(--r-card);
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--sh-1);
}
.checker-figure img{
  width:100%;
  height:100%;
  aspect-ratio:4/3;
  object-fit:cover;
  object-position:30% 50%;
  border-radius:var(--r-img);
}
.table-scroll{
  overflow-x:auto;
  border:1px solid var(--line);
  border-radius:var(--r-card);
  background:var(--panel);
}
table.symptom{min-width:560px;font-size:14px;}
table.symptom th,
table.symptom td{
  padding:16px 18px;
  text-align:left;
  border-bottom:1px solid var(--line);
  vertical-align:top;
  line-height:1.8;
}
table.symptom th{
  color:var(--t1);
  font-weight:600;
  font-size:13px;
  letter-spacing:.06em;
  background:rgba(34,211,197,.06);
}
table.symptom td{color:var(--t2);}
table.symptom tr:last-child td{border-bottom:0;}
table.symptom td:first-child{color:var(--t1);font-weight:500;}

/* ============ 提醒条 ============ */
.note-strip{
  display:flex;
  gap:18px;
  align-items:flex-start;
  background:var(--panel-2);
  border:1px solid var(--line);
  border-left:3px solid var(--primary);
  border-radius:12px;
  padding:22px 24px;
  margin-top:28px;
}
.note-strip svg{width:22px;height:22px;flex-shrink:0;color:var(--primary);margin-top:4px;}
.note-strip p{font-size:15px;line-height:1.85;color:var(--t2);}
.note-strip strong{color:var(--t1);}

/* ============ CTA 面板 ============ */
.cta-panel{
  background:linear-gradient(135deg,var(--panel) 0%,var(--panel-2) 100%);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:44px 40px;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:28px;
  box-shadow:var(--sh-1);
  position:relative;
  overflow:hidden;
}
.cta-panel::after{
  content:"";
  position:absolute;
  right:-60px;top:-60px;
  width:220px;height:220px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(34,211,197,.14),transparent 70%);
}
.cta-panel__text{max-width:640px;position:relative;z-index:1;}
.cta-panel__text h2{font-size:clamp(22px,2.4vw,30px);margin-bottom:12px;}
.cta-panel__text p{font-size:15px;line-height:1.85;color:var(--t2);}
.cta-panel__actions{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:18px;
  position:relative;
  z-index:1;
}

/* ============ 表单 ============ */
.feedback-form{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:22px;
  margin-top:34px;
}
.field{display:flex;flex-direction:column;gap:8px;}
.field--full{grid-column:1 / -1;}
.field label{font-size:13px;color:var(--t2);letter-spacing:.04em;}
.field input,
.field select,
.field textarea{
  background:var(--bg-1);
  border:1px solid var(--line);
  border-radius:var(--r-btn);
  padding:13px 14px;
  color:var(--t1);
  line-height:1.7;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.field textarea{min-height:120px;resize:vertical;}
.field input:focus,
.field select:focus,
.field textarea:focus{
  outline:none;
  border-color:var(--primary);
  box-shadow:0 0 0 3px rgba(34,211,197,.14);
}
.field .hint{font-size:12px;color:var(--t3);}
.field .err{font-size:12px;color:var(--warn);}
.form-submit{display:flex;align-items:center;gap:18px;grid-column:1 / -1;flex-wrap:wrap;}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--bg-0);
  border-top:1px solid var(--line);
  position:relative;
  padding-top:72px;
  margin-top:0;
}
.site-footer::before{
  content:"";
  position:absolute;
  top:0;left:0;right:0;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(34,211,197,.6),transparent);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1fr;
  gap:40px;
  padding-bottom:52px;
}
.footer-brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:16px;
  font-weight:700;
  color:var(--t1);
  margin-bottom:16px;
}
.footer-col p{font-size:14px;line-height:1.85;color:var(--t3);max-width:340px;}
.footer-col h4{color:var(--t1);font-size:14px;margin-bottom:18px;letter-spacing:.05em;}
.footer-col ul li{margin-bottom:10px;}
.footer-col ul a{
  font-size:14px;
  color:var(--t2);
  display:inline-block;
  transition:color .2s ease,transform .2s ease;
}
.footer-col ul a:hover{color:var(--primary);transform:translateX(2px);}
.footer-bottom{
  border-top:1px solid var(--line);
  padding:22px 0 30px;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  font-size:13px;
  color:var(--t3);
}
.to-top{
  display:inline-flex;
  align-items:center;
  gap:8px;
  color:var(--t2);
  border:1px solid var(--line);
  border-radius:8px;
  padding:8px 14px;
  font-size:13px;
}
.to-top:hover{color:var(--primary);border-color:var(--line-strong);}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  :root{--sec-y:84px;}
}
@media (max-width:1023px){
  :root{--sec-y:72px;}
  .checker-grid{grid-template-columns:1fr;gap:32px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .checker-figure img{aspect-ratio:16/9;object-position:50% 40%;}
}
@media (max-width:767px){
  :root{--sec-y:48px;--nav-h:56px;}
  .grid-container{padding-left:20px;padding-right:20px;}
  .page-hero{padding-top:calc(var(--nav-h) + 34px);padding-bottom:40px;min-height:240px;}
  .page-hero h1{font-size:clamp(26px,7vw,34px);}
  .logo-text{font-size:15px;}
  .logo-sub{display:none;}
  .faq-panel{padding:4px 16px;}
  .faq-panel .accordion-title{padding:16px 34px 16px 0;font-size:15px;}
  .faq-panel .accordion-content{padding:0 8px 18px 0;font-size:15px;}
  .cta-panel{padding:30px 22px;}
  .feedback-form{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .note-strip{flex-direction:column;gap:12px;padding:18px;}
}
@media (max-width:575px){
  .tag{font-size:12px;padding:7px 12px;}
  .btn{padding:12px 18px;font-size:14px;}
  .logo-mark{width:30px;height:30px;}
  table.symptom th,table.symptom td{padding:13px 14px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;scroll-behavior:auto !important;}
}