/* roulang page: index */
:root{
  --bg-base:#070C18;
  --bg-panel:#0D1526;
  --bg-elev:#121C33;
  --glass:rgba(255,255,255,.06);
  --brand:#2C6BFF;
  --brand-hi:#5B94FF;
  --accent:#2FE0C8;
  --accent-2:#7A5CFF;
  --warn:#FFB454;
  --text:#EAF1FF;
  --body:#A9B8D6;
  --muted:#6C7C9C;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.18);
  --link:#7FB2FF;
  --radius-card:12px;
  --radius-btn:10px;
  --shadow:0 8px 24px rgba(0,0,0,.45);
  --shadow-hover:0 14px 32px rgba(0,0,0,.55);
  --glow:0 0 0 1px rgba(47,224,200,.35),0 8px 30px rgba(44,107,255,.45);
  --container:1240px;
  --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;
  background:var(--bg-base);
  color:var(--body);
  font-family:"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.8;
  letter-spacing:.01em;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  background-image:
    linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:24px 24px;
  pointer-events:none;
  z-index:0;
}
.scanline{
  position:fixed;
  top:0;left:0;right:0;
  height:2px;
  background:linear-gradient(90deg,transparent,rgba(47,224,200,.85),transparent);
  z-index:80;
  pointer-events:none;
  opacity:.75;
}
h1,h2,h3,h4{margin:0;color:var(--text);font-weight:700;letter-spacing:.01em;}
p{margin:0;}
a{color:var(--link);text-decoration:none;transition:color .2s var(--ease);}
a:hover{color:var(--accent);text-decoration:underline;text-underline-offset:2px;}
img{max-width:100%;display:block;border-style:none;}
ul,ol{margin:0;padding:0;list-style:none;}
button,input,select,textarea{font:inherit;color:inherit;}
button{cursor:pointer;border:0;background:none;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;position:relative;}
main{position:relative;z-index:1;}
section{position:relative;z-index:1;}
.section{padding:88px 0;}
.section-alt{background:linear-gradient(180deg,rgba(13,21,38,.6),rgba(7,12,24,.2));border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;flex-wrap:wrap;}
.section-head h2{font-size:32px;line-height:1.375;}
.section-head .sub{margin-top:10px;font-size:15px;color:var(--muted);max-width:640px;line-height:1.75;}
.link-more{font-size:15px;font-weight:600;color:var(--link);white-space:nowrap;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.14em;color:var(--accent);
  text-transform:uppercase;margin-bottom:16px;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--accent);display:inline-block;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;line-height:1;
  border:1px solid transparent;cursor:pointer;
  transition:transform .2s var(--ease),box-shadow .24s var(--ease),background .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
  text-align:center;white-space:nowrap;
}
.btn-primary{
  background:linear-gradient(135deg,#2C6BFF,#1B4FD8);
  color:#fff;
  box-shadow:var(--glow);
}
.btn-primary:hover{
  color:#fff;text-decoration:none;
  filter:brightness(1.08);
  transform:translateY(-1px);
  box-shadow:0 0 0 1px rgba(47,224,200,.45),0 12px 36px rgba(44,107,255,.55);
}
.btn-primary:active{transform:translateY(0);box-shadow:0 0 0 1px rgba(47,224,200,.3),0 6px 18px rgba(44,107,255,.4);}
.btn-ghost{
  background:var(--glass);
  border-color:var(--line-strong);
  color:var(--text);
}
.btn-ghost:hover{
  color:var(--text);text-decoration:none;
  border-color:rgba(47,224,200,.55);
  background:rgba(47,224,200,.08);
  transform:translateY(-1px);
}
.btn:disabled,.btn[disabled]{opacity:.4;pointer-events:none;box-shadow:none;}
.badge{
  display:inline-flex;align-items:center;
  height:24px;padding:0 10px;border-radius:999px;
  font-size:12px;font-weight:600;line-height:1;letter-spacing:.04em;
  border:1px solid rgba(122,92,255,.5);
  color:#B9A8FF;background:rgba(122,92,255,.12);
}
.badge-accent{border-color:rgba(47,224,200,.5);color:var(--accent);background:rgba(47,224,200,.1);}
.badge-warn{border-color:rgba(255,180,84,.5);color:var(--warn);background:rgba(255,180,84,.1);}
.card{
  background:var(--bg-panel);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow);
  transition:transform .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease);
}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:var(--line-strong);}
.glass{
  background:rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.08);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow),inset 0 1px 0 rgba(255,255,255,.08);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
}
.num{font-variant-numeric:tabular-nums;font-weight:700;letter-spacing:-.02em;}

/* ============ 导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(7,12,24,.74);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  transition:background .3s var(--ease),box-shadow .3s var(--ease);
}
.site-header.is-stuck{
  background:rgba(7,12,24,.9);
  box-shadow:0 10px 30px rgba(0,0,0,.5);
}
.header-top{
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  height:72px;
  transition:height .28s var(--ease);
}
.site-header.is-stuck .header-top{height:60px;}
.logo{display:flex;align-items:center;gap:10px;color:var(--text);font-weight:700;font-size:19px;letter-spacing:.02em;}
.logo:hover{color:var(--text);text-decoration:none;}
.logo-mark{
  width:34px;height:34px;border-radius:10px;flex:none;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,#2C6BFF,#7A5CFF);
  box-shadow:0 6px 18px rgba(44,107,255,.45);
}
.logo-mark svg{width:18px;height:18px;}
.logo-text{white-space:nowrap;}
.top-links{display:flex;align-items:center;gap:6px;}
.top-links a{
  display:inline-flex;align-items:center;height:36px;padding:0 14px;border-radius:999px;
  font-size:14px;color:var(--body);
}
.top-links a:hover{color:var(--text);background:rgba(255,255,255,.06);text-decoration:none;}
.top-links a.active{color:var(--accent);background:rgba(47,224,200,.08);}
.header-search-row{
  padding-bottom:16px;
  transition:max-height .3s var(--ease),opacity .25s var(--ease),padding .3s var(--ease);
  max-height:120px;overflow:hidden;
}
.site-header.is-stuck .header-search-row{max-height:0;opacity:0;padding-bottom:0;}
.search-box{
  display:flex;align-items:center;gap:8px;
  width:100%;max-width:620px;margin:0 auto;
  height:48px;padding:0 5px 0 16px;
  background:rgba(255,255,255,.06);
  border:1px solid var(--line);
  border-radius:12px;
  transition:border-color .2s var(--ease),box-shadow .24s var(--ease),background .2s var(--ease);
}
.search-box:focus-within{
  border-color:var(--accent);
  background:rgba(255,255,255,.08);
  box-shadow:0 0 0 1px rgba(47,224,200,.35),0 0 26px rgba(44,107,255,.35);
}
.search-box svg{width:18px;height:18px;flex:none;stroke:var(--muted);}
.search-box:focus-within svg{stroke:var(--accent);}
.search-box input{
  flex:1;min-width:0;height:100%;border:0;background:transparent;outline:none;
  font-size:15px;color:var(--text);
}
.search-box input::placeholder{color:var(--muted);font-size:14px;}
.btn-search{
  flex:none;height:38px;padding:0 20px;border-radius:9px;
  background:linear-gradient(135deg,#2C6BFF,#1B4FD8);color:#fff;
  font-size:14px;font-weight:600;
  box-shadow:0 6px 18px rgba(44,107,255,.42);
  transition:filter .2s var(--ease),transform .2s var(--ease);
}
.btn-search:hover{filter:brightness(1.1);transform:translateY(-1px);}
.header-caps{
  display:flex;align-items:center;gap:10px;
  padding-bottom:14px;
  overflow-x:auto;scrollbar-width:none;
  transition:max-height .3s var(--ease),opacity .22s var(--ease),padding .3s var(--ease);
  max-height:80px;
}
.header-caps::-webkit-scrollbar{display:none;}
.site-header.is-stuck .header-caps{max-height:0;opacity:0;padding-bottom:0;}
.cap{
  display:inline-flex;align-items:center;gap:7px;flex:none;
  height:34px;padding:0 15px;border-radius:999px;
  font-size:13px;color:var(--body);
  border:1px solid var(--line);
  background:rgba(255,255,255,.03);
  white-space:nowrap;
  transition:all .2s var(--ease);
}
.cap:hover{color:var(--text);border-color:var(--line-strong);text-decoration:none;}
.cap.active{color:var(--accent);border-color:rgba(47,224,200,.6);background:rgba(47,224,200,.08);}
.cap i{width:6px;height:6px;border-radius:50%;background:var(--accent-2);flex:none;}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:10px;
  border:1px solid var(--line);background:var(--glass);
  align-items:center;justify-content:center;flex:none;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--text);position:relative;}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--text);
}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}

/* 抽屉 */
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(340px,86vw);
  background:rgba(13,21,38,.98);
  border-left:1px solid var(--line);
  z-index:90;
  transform:translateX(100%);
  transition:transform .32s var(--ease);
  padding:24px;
  overflow-y:auto;
  display:flex;flex-direction:column;gap:22px;
}
.drawer.open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;}
.drawer-head strong{color:var(--text);font-size:16px;}
.drawer-close{width:36px;height:36px;border-radius:9px;border:1px solid var(--line);color:var(--muted);font-size:18px;line-height:1;}
.drawer .search-box{max-width:none;height:46px;}
.drawer-nav{display:flex;flex-direction:column;gap:6px;}
.drawer-nav a{
  display:flex;align-items:center;justify-content:space-between;
  padding:12px 14px;border-radius:10px;font-size:15px;color:var(--body);
  border:1px solid transparent;
}
.drawer-nav a:hover,.drawer-nav a.active{
  color:var(--text);background:rgba(255,255,255,.05);border-color:var(--line);text-decoration:none;
}
.drawer-nav a.active{color:var(--accent);border-color:rgba(47,224,200,.4);}
.mask{
  position:fixed;inset:0;background:rgba(4,7,14,.66);
  opacity:0;pointer-events:none;transition:opacity .3s var(--ease);z-index:85;
}
.mask.open{opacity:1;pointer-events:auto;}

/* ============ Hero ============ */
.hero{
  position:relative;overflow:hidden;
  padding:76px 0 88px;
  border-bottom:1px solid var(--line);
}
.hero::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;
  opacity:.34;
}
.hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(7,12,24,.78),rgba(7,12,24,.9) 62%,var(--bg-base));
}
.hero .container{position:relative;z-index:2;}
.hero-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:24px;align-items:center;}
.hero-copy{grid-column:span 7;}
.hero-copy h1{font-size:44px;line-height:1.27;margin-bottom:20px;}
.hero-copy h1 em{font-style:normal;color:var(--accent);}
.hero-sub{font-size:17px;line-height:1.85;color:var(--body);max-width:560px;margin-bottom:30px;}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:26px;}
.trust-row{display:flex;gap:20px;flex-wrap:wrap;font-size:13px;color:var(--muted);}
.trust-row span{display:inline-flex;align-items:center;gap:7px;}
.trust-row span::before{
  content:"";width:6px;height:6px;background:var(--accent);flex:none;
  transform:rotate(45deg);
}
.hero-card{grid-column:span 5;padding:26px;}
.hero-card-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;}
.hero-card-top b{font-size:15px;color:var(--text);font-weight:600;}
.mini-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-bottom:20px;}
.mini{
  padding:14px;border-radius:10px;
  background:rgba(255,255,255,.04);
  border:1px solid var(--line);
}
.mini b{display:block;font-size:19px;color:var(--text);line-height:1.3;}
.mini span{font-size:12px;color:var(--muted);}
.spark-wrap{border-top:1px solid var(--line);padding-top:16px;}
.spark-wrap small{display:block;font-size:12px;color:var(--muted);margin-bottom:8px;}
.spark{width:100%;height:56px;display:block;}

/* ============ KPI ============ */
.kpi-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.kpi{
  padding:24px;position:relative;overflow:hidden;
  background:var(--bg-panel);border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow);
  transition:transform .24s var(--ease),border-color .24s var(--ease),box-shadow .24s var(--ease);
}
.kpi:hover{transform:translateY(-3px);border-color:var(--line-strong);box-shadow:var(--shadow-hover);}
.kpi b{display:block;font-size:40px;line-height:1.1;color:var(--accent);margin-bottom:10px;}
.kpi i{display:block;font-style:normal;font-size:13px;color:var(--muted);line-height:1.7;}
.kpi::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:linear-gradient(90deg,var(--brand),var(--accent));
  opacity:.85;
}

/* ============ 服务矩阵 ============ */
.matrix{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-bottom:24px;}
.matrix-main{
  padding:0;overflow:hidden;display:flex;flex-direction:column;
}
.matrix-main .cover{position:relative;aspect-ratio:16/9;overflow:hidden;}
.matrix-main .cover img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease);}
.matrix-main:hover .cover img{transform:scale(1.05);}
.matrix-main .cover::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(7,12,24,.1),rgba(13,21,38,.92));
}
.matrix-main .body{padding:24px;}
.matrix-main h3{font-size:22px;line-height:1.45;margin-bottom:12px;}
.matrix-main p{font-size:15px;color:var(--body);margin-bottom:16px;}
.point-list li{
  position:relative;padding-left:18px;font-size:14px;color:var(--body);line-height:1.85;margin-bottom:6px;
}
.point-list li::before{
  content:"";position:absolute;left:0;top:11px;width:6px;height:6px;
  background:var(--accent);border-radius:1px;
}
.matrix-main .link-more{display:inline-block;margin-top:16px;}
.matrix-side{display:grid;gap:24px;grid-template-rows:1fr 1fr;}
.matrix-small{padding:24px;display:flex;flex-direction:column;justify-content:center;}
.matrix-small h3{font-size:18px;line-height:1.5;margin-bottom:12px;}
.matrix-small p{font-size:14px;color:var(--body);line-height:1.85;}
.matrix-small .tag-row{margin-top:14px;display:flex;gap:8px;flex-wrap:wrap;}
.num-row{
  display:grid;grid-template-columns:repeat(4,1fr);
  border:1px solid var(--line);border-radius:var(--radius-card);
  background:var(--bg-panel);overflow:hidden;
}
.num-item{padding:24px;border-left:1px solid var(--line);}
.num-item:first-child{border-left:0;}
.num-item b{
  display:block;font-size:13px;color:var(--accent);letter-spacing:.14em;
  font-variant-numeric:tabular-nums;margin-bottom:12px;
}
.num-item h4{font-size:16px;line-height:1.5;margin-bottom:8px;}
.num-item p{font-size:14px;color:var(--muted);line-height:1.8;}

/* ============ 列表 ============ */
.news-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;}
.news-card{
  display:flex;flex-direction:column;
  background:var(--bg-panel);border:1px solid var(--line);border-radius:var(--radius-card);
  overflow:hidden;color:inherit;
  box-shadow:var(--shadow);
  transition:transform .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease);
}
.news-card:hover{
  transform:translateY(-3px);
  border-color:var(--line-strong);
  box-shadow:var(--shadow-hover);
  text-decoration:none;color:inherit;
}
.news-thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--bg-elev);}
.news-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease);}
.news-card:hover .news-thumb img{transform:scale(1.05);}
.news-thumb .badge{position:absolute;left:14px;top:14px;}
.news-body{padding:22px;display:flex;flex-direction:column;flex:1;}
.news-body h3{
  font-size:18px;line-height:1.55;margin-bottom:10px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-body p{
  font-size:14px;line-height:1.75;color:var(--muted);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  margin-bottom:18px;
}
.news-foot{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;
  padding-top:14px;border-top:1px solid var(--line);
  font-size:13px;color:var(--muted);
}
.news-foot .arrow{color:var(--accent);font-size:15px;}
.empty-state{
  grid-column:1/-1;
  padding:56px 24px;text-align:center;
  border:1px dashed var(--line-strong);border-radius:var(--radius-card);
  background:rgba(13,21,38,.6);
}
.empty-state svg{width:42px;height:42px;stroke:var(--muted);margin:0 auto 14px;}
.empty-state p{font-size:15px;color:var(--muted);margin-bottom:18px;}

/* ============ 对比 ============ */
.compare{
  display:grid;grid-template-columns:1fr 1px 1fr;gap:0;
  background:var(--bg-panel);border:1px solid var(--line);border-radius:var(--radius-card);
  overflow:hidden;box-shadow:var(--shadow);
}
.compare-sep{background:var(--line);}
.compare-col{padding:32px 28px;}
.compare-col h3{font-size:18px;margin-bottom:6px;}
.compare-col .hint{font-size:13px;color:var(--muted);margin-bottom:24px;}
.compare-col-accent h3{color:var(--accent);}
.c-row{margin-bottom:22px;}
.c-row:last-child{margin-bottom:0;}
.c-row span{display:block;font-size:13px;color:var(--body);margin-bottom:9px;}
.c-bar{height:8px;border-radius:999px;background:rgba(255,255,255,.06);overflow:hidden;}
.c-bar i{display:block;height:100%;border-radius:999px;width:var(--w,50%);}
.compare-col .c-bar i{background:rgba(255,255,255,.22);}
.compare-col-accent .c-bar i{
  background:linear-gradient(90deg,#2C6BFF,#2FE0C8);
  box-shadow:0 0 14px rgba(47,224,200,.45);
}

/* ============ FAQ ============ */
.faq{max-width:920px;margin:0 auto;}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:22px 0 22px 0;text-align:left;
  font-size:16px;font-weight:600;color:var(--text);line-height:1.6;
  position:relative;transition:color .2s var(--ease);
}
.faq-q::before{
  content:"";position:absolute;left:-15px;top:22px;bottom:22px;width:3px;
  background:var(--accent);border-radius:2px;opacity:0;transition:opacity .22s var(--ease);
}
.faq-item.open .faq-q{color:var(--accent);}
.faq-item.open .faq-q::before{opacity:1;}
.faq-q .ico{
  flex:none;width:26px;height:26px;border-radius:8px;
  border:1px solid var(--line-strong);
  display:flex;align-items:center;justify-content:center;
  font-size:15px;color:var(--muted);line-height:1;
  transition:transform .22s var(--ease),border-color .22s var(--ease),color .22s var(--ease);
}
.faq-item.open .faq-q .ico{transform:rotate(45deg);border-color:rgba(47,224,200,.6);color:var(--accent);}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height .22s ease-out,opacity .22s ease-out,padding .22s ease-out;
  opacity:0;
}
.faq-item.open .faq-a{max-height:340px;opacity:1;padding-bottom:22px;}
.faq-a p{font-size:15px;line-height:1.86;color:var(--body);max-width:820px;}

/* ============ 表单 CTA ============ */
.cta-box{
  padding:40px;
  display:grid;grid-template-columns:repeat(12,1fr);gap:24px;
  background:rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.08);
  border-radius:var(--radius-card);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  box-shadow:var(--shadow),inset 0 1px 0 rgba(255,255,255,.08);
}
.cta-copy{grid-column:span 5;}
.cta-copy h2{font-size:28px;line-height:1.42;margin-bottom:14px;}
.cta-copy p{font-size:15px;color:var(--body);margin-bottom:20px;}
.cta-form{grid-column:span 7;display:grid;grid-template-columns:1fr 1fr;gap:16px;}
.field{display:flex;flex-direction:column;gap:8px;}
.field.full{grid-column:1/-1;}
.field label{font-size:13px;color:var(--muted);}
.field input,.field select,.field textarea{
  width:100%;height:48px;padding:0 14px;
  background:rgba(7,12,24,.6);
  border:1px solid rgba(255,255,255,.12);
  border-radius:12px;
  font-size:15px;color:var(--text);
  outline:none;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease);
}
.field textarea{height:104px;padding:12px 14px;resize:vertical;line-height:1.7;}
.field select{appearance:none;background-image:linear-gradient(45deg,transparent 50%,var(--muted) 50%),linear-gradient(135deg,var(--muted) 50%,transparent 50%);background-position:calc(100% - 20px) 21px,calc(100% - 15px) 21px;background-size:5px 5px,5px 5px;background-repeat:no-repeat;}
.field input:focus,.field select:focus,.field textarea:focus{
  border-color:var(--accent);
  background:rgba(7,12,24,.8);
  box-shadow:0 0 0 1px rgba(47,224,200,.35);
}
.field input::placeholder,.field textarea::placeholder{color:var(--muted);}
.form-status{
  grid-column:1/-1;display:none;align-items:center;gap:10px;
  padding:12px 16px;border-radius:10px;font-size:14px;
  background:rgba(47,224,200,.1);border:1px solid rgba(47,224,200,.4);color:var(--accent);
}
.form-status.show{display:flex;}

/* ============ 页脚 ============ */
.site-footer{
  background:#060A12;
  border-top:1px solid var(--line);
  padding:64px 0 0;
  position:relative;z-index:1;
}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;padding-bottom:48px;}
.footer-brand .logo{margin-bottom:16px;}
.footer-brand p{font-size:14px;line-height:1.85;color:var(--muted);max-width:340px;}
.footer-col h4{font-size:14px;font-weight:600;color:var(--text);margin-bottom:18px;letter-spacing:.04em;}
.footer-col a{display:block;font-size:14px;color:var(--muted);padding:6px 0;}
.footer-col a:hover{color:var(--accent);text-decoration:none;}
.footer-bottom{
  border-top:1px solid var(--line);
  padding:22px 0;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--muted);
}
.footer-bottom a{color:var(--muted);}
.footer-bottom a:hover{color:var(--accent);}
.to-top{
  position:fixed;right:28px;bottom:28px;width:56px;height:56px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.12);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  color:var(--accent);z-index:70;
  opacity:0;pointer-events:none;transform:translateY(12px);
  transition:opacity .3s var(--ease),transform .3s var(--ease),border-color .3s var(--ease);
}
.to-top.show{opacity:1;pointer-events:auto;transform:translateY(0);}
.to-top:hover{border-color:rgba(47,224,200,.6);}
.to-top svg{width:20px;height:20px;stroke:var(--accent);}

/* ============ 骨架屏 ============ */
.skeleton{
  background:rgba(127,178,255,.06);
  background-image:linear-gradient(90deg,rgba(255,255,255,0),rgba(255,255,255,.09),rgba(255,255,255,0));
  background-size:200% 100%;
  animation:sweep 1.6s infinite linear;
  border-radius:8px;
}
@keyframes sweep{0%{background-position:200% 0;}100%{background-position:-200% 0;}}

/* ============ 响应式 ============ */
@media (max-width:1280px){
  .container{padding:0 24px;}
  .hero-copy h1{font-size:40px;}
}
@media (max-width:1024px){
  .top-links{display:none;}
  .nav-toggle{display:flex;}
  .kpi-grid{grid-template-columns:1fr 1fr;}
  .matrix{grid-template-columns:1fr;}
  .num-row{grid-template-columns:1fr 1fr;}
  .num-item:nth-child(3){border-left:0;border-top:1px solid var(--line);}
  .num-item:nth-child(4){border-top:1px solid var(--line);}
  .compare{grid-template-columns:1fr;}
  .compare-sep{height:1px;width:100%;}
  .cta-box{grid-template-columns:1fr;}
  .cta-copy,.cta-form{grid-column:1/-1;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .section{padding:72px 0;}
}
@media (max-width:768px){
  body{font-size:15px;}
  .section{padding:56px 0;}
  .hero{padding:52px 0 56px;}
  .hero-grid{grid-template-columns:1fr;}
  .hero-copy,.hero-card{grid-column:1/-1;}
  .hero-copy h1{font-size:30px;}
  .section-head h2{font-size:24px;}
  .news-grid{grid-template-columns:1fr;}
  .section-head{margin-bottom:28px;}
  .faq-item.open .faq-a{max-height:520px;}
  .cta-box{padding:26px 20px;}
  .cta-copy h2{font-size:22px;}
  .cta-form{grid-template-columns:1fr;}
  .to-top{right:16px;bottom:16px;width:48px;height:48px;}
}
@media (max-width:560px){
  .container{padding:0 16px;}
  .search-box{max-width:none;}
  .header-search-row{max-height:150px;}
  .search-box{flex-wrap:nowrap;}
  .btn-search{padding:0 16px;}
  .kpi-grid{grid-template-columns:1fr;}
  .num-row{grid-template-columns:1fr;}
  .num-item{border-left:0;border-top:1px solid var(--line);}
  .num-item:first-child{border-top:0;}
  .footer-grid{grid-template-columns:1fr;}
  .matrix-side{grid-template-rows:auto;}
  body::before{display:none;}
  .scanline{display:none;}
  .hero-actions .btn{width:100%;}
}
@media (max-width:380px){
  .container{padding:0 14px;}
  .logo{font-size:16px;}
  .logo-mark{width:30px;height:30px;}
  .trust-row{gap:12px;}
  .mini-grid{grid-template-columns:1fr;}
  .news-body{padding:16px;}
}

/* roulang page: article */
:root{
  --bg-base:#070C18;
  --bg-panel:#0D1526;
  --bg-elev:#121C33;
  --glass:rgba(255,255,255,.06);
  --brand:#2C6BFF;
  --brand-hover:#5B94FF;
  --accent:#2FE0C8;
  --accent-2:#7A5CFF;
  --warn:#FFB454;
  --text-title:#EAF1FF;
  --text-body:#A9B8D6;
  --text-read:#C3D0E8;
  --text-muted:#6C7C9C;
  --link:#7FB2FF;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.18);
  --radius:12px;
  --radius-sm:8px;
  --radius-btn:10px;
  --shadow:0 8px 24px rgba(0,0,0,.45);
  --shadow-lg:0 12px 32px rgba(0,0,0,.55);
  --glow:0 0 0 1px rgba(47,224,200,.35),0 8px 30px rgba(44,107,255,.45);
  --container:1240px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --font-num:"Inter","DIN Alternate","PingFang SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.78;
  color:var(--text-body);
  background:var(--bg-base);
  overflow-x:hidden;
}
body::before{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:24px 24px;
}
body::after{
  content:"";position:fixed;top:0;left:0;right:0;height:2px;z-index:70;pointer-events:none;
  background:linear-gradient(90deg,transparent,rgba(44,107,255,.85),rgba(47,224,200,.85),transparent);
  background-size:200% 100%;
  animation:scanline 7s linear infinite;
}
@keyframes scanline{0%{background-position:0 0}100%{background-position:200% 0}}
h1,h2,h3,h4{color:var(--text-title);margin:0;font-weight:650;letter-spacing:.01em}
p{margin:0}
a{color:var(--link);text-decoration:none;transition:color .2s var(--ease)}
a:hover{color:var(--accent);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:2px}
img{max-width:100%;display:block;border:0}
ul,ol{margin:0;padding:0;list-style:none}
button{font-family:inherit;cursor:pointer}
input,select,textarea{font-family:inherit;font-size:15px}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--accent);color:#04121C;padding:10px 16px;z-index:200;border-radius:0 0 8px 0}
.skip-link:focus{left:0}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;position:relative;z-index:1}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(7,12,24,.9);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  transition:background .28s var(--ease);
}
.site-header::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;
  background:linear-gradient(90deg,transparent,rgba(44,107,255,.5),rgba(47,224,200,.5),transparent);
}
.site-header.scrolled{background:rgba(7,12,24,.94)}
.site-header.scrolled .header-search-row,
.site-header.scrolled .header-caps{display:none}
.header-top{display:flex;align-items:center;justify-content:space-between;gap:20px;height:72px}
.site-header.scrolled .header-top{height:60px}
.logo{display:inline-flex;align-items:center;gap:10px;color:var(--text-title);flex:0 0 auto}
.logo:hover{color:var(--text-title);text-decoration:none}
.logo-mark{
  width:34px;height:34px;border-radius:10px;display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,#2C6BFF,#1B4FD8);
  box-shadow:0 6px 18px rgba(44,107,255,.4);
}
.logo-mark svg{width:20px;height:20px}
.logo-text{font-size:18px;font-weight:700;letter-spacing:.02em;white-space:nowrap}
.top-links{display:flex;align-items:center;gap:26px}
.top-links a{font-size:14px;color:var(--text-body);padding:6px 0;border-bottom:2px solid transparent}
.top-links a:hover{color:var(--accent);text-decoration:none}
.top-links a.active{color:var(--text-title);border-bottom-color:var(--accent)}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:10px;border:1px solid var(--line);
  background:var(--glass);position:relative;flex:0 0 auto;
}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{
  position:absolute;left:50%;width:18px;height:2px;background:var(--text-title);border-radius:2px;
  transform:translateX(-50%);content:"";transition:transform .24s var(--ease),opacity .24s var(--ease);
}
.nav-toggle span{top:19px}
.nav-toggle span::before{top:-6px;left:0;transform:none}
.nav-toggle span::after{top:6px;left:0;transform:none}
.header-search-row{padding:2px 0 14px;display:flex;justify-content:center}
.search-box{
  width:50%;display:flex;align-items:center;gap:8px;height:48px;padding:0 6px 0 14px;
  background:var(--glass);border:1px solid var(--line);border-radius:var(--radius);
  transition:border-color .24s var(--ease),box-shadow .24s var(--ease);
}
.search-box svg{width:18px;height:18px;stroke:var(--text-muted);flex:0 0 auto}
.search-box input{
  flex:1;min-width:0;background:transparent;border:0;color:var(--text-title);height:44px;outline:none;
}
.search-box input::placeholder{color:var(--text-muted)}
.search-box:focus-within{border-color:rgba(47,224,200,.7);box-shadow:0 0 0 3px rgba(47,224,200,.14)}
.btn-search{
  height:36px;padding:0 22px;border:0;border-radius:var(--radius-sm);color:#fff;font-weight:600;font-size:14px;
  background:linear-gradient(135deg,#2C6BFF,#1B4FD8);
  box-shadow:0 4px 14px rgba(44,107,255,.42);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),filter .2s var(--ease);
}
.btn-search:hover{filter:brightness(1.08);transform:translateY(-1px);box-shadow:0 8px 22px rgba(44,107,255,.55)}
.btn-search:active{transform:translateY(1px);box-shadow:0 2px 8px rgba(44,107,255,.35)}
.header-caps{display:flex;align-items:center;gap:8px;padding-bottom:14px;overflow-x:auto;scrollbar-width:none}
.header-caps::-webkit-scrollbar{display:none}
.cap{
  display:inline-flex;align-items:center;gap:7px;height:34px;padding:0 15px;border-radius:999px;
  border:1px solid var(--line);background:rgba(255,255,255,.03);
  color:var(--text-body);font-size:13px;white-space:nowrap;
  transition:all .22s var(--ease);
}
.cap:hover{border-color:var(--line-strong);color:var(--text-title);text-decoration:none}
.cap i{width:6px;height:6px;border-radius:50%;background:var(--accent-2);flex:0 0 auto}
.cap.active{border-color:rgba(47,224,200,.5);background:rgba(47,224,200,.08);color:#DFF6F2}

/* ============ 抽屉 ============ */
.drawer{
  position:fixed;top:0;right:0;width:320px;max-width:86vw;height:100%;z-index:120;
  background:var(--bg-panel);border-left:1px solid var(--line);
  transform:translateX(100%);transition:transform .3s var(--ease);
  padding:20px;overflow-y:auto;
}
.drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.drawer-title{font-size:15px;color:var(--text-title);font-weight:600}
.drawer-close{width:36px;height:36px;border-radius:9px;border:1px solid var(--line);background:var(--glass);color:var(--text-title);font-size:18px;line-height:1}
.drawer-search{width:100%;margin-bottom:18px}
.drawer-nav{display:flex;flex-direction:column;gap:6px}
.drawer-nav a{
  padding:12px 14px;border-radius:var(--radius-sm);color:var(--text-body);font-size:15px;
  border:1px solid transparent;background:rgba(255,255,255,.03);
}
.drawer-nav a:hover,.drawer-nav a.active{color:var(--text-title);border-color:rgba(47,224,200,.4);background:rgba(47,224,200,.07);text-decoration:none}
.drawer-mask{
  position:fixed;inset:0;background:rgba(4,8,16,.6);z-index:110;opacity:0;visibility:hidden;
  transition:opacity .3s var(--ease),visibility .3s var(--ease);
}
.drawer-mask.open{opacity:1;visibility:visible}

/* ============ 页头横幅 ============ */
.page-hero{
  position:relative;padding:44px 0 40px;overflow:hidden;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
  border-bottom:1px solid var(--line);
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(7,12,24,.82),rgba(7,12,24,.94));
}
.page-hero .container{position:relative;z-index:1}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-muted);margin-bottom:18px}
.breadcrumb a{color:var(--text-muted)}
.breadcrumb a:hover{color:var(--accent)}
.breadcrumb .current{color:var(--text-muted)}
.crumb-sep{opacity:.5}
.badge{
  display:inline-flex;align-items:center;gap:6px;height:28px;padding:0 12px;border-radius:999px;
  font-size:12.5px;letter-spacing:.02em;
}
.badge-cat{border:1px solid rgba(122,92,255,.55);background:rgba(122,92,255,.12);color:#CFC4FF}
.article-hero h1{
  font-size:34px;line-height:1.42;margin:16px 0 18px;max-width:920px;font-weight:700;letter-spacing:.005em;
}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:12px;font-size:13px;color:var(--text-muted)}
.meta-row .dot{width:1px;height:12px;background:var(--line-strong)}
.meta-row b{font-weight:500;color:var(--text-body)}

/* ============ 正文布局 ============ */
.article-wrap{padding:56px 0 72px}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:40px;align-items:start}
.article-main{min-width:0}
.article-content{
  max-width:760px;font-size:16px;line-height:1.9;color:var(--text-read);
  background:var(--bg-panel);border:1px solid var(--line);border-radius:16px;
  padding:34px 34px 30px;box-shadow:var(--shadow);
}
.article-content > *:first-child{margin-top:0}
.article-content p{margin:0 0 18px}
.article-content h2{
  position:relative;font-size:26px;line-height:1.45;margin:42px 0 16px;padding-left:15px;
}
.article-content h2::before{
  content:"";position:absolute;left:0;top:7px;bottom:7px;width:3px;border-radius:2px;
  background:linear-gradient(180deg,var(--accent),rgba(47,224,200,.25));
}
.article-content h3{font-size:20px;line-height:1.55;margin:30px 0 12px;color:#DCE6FA}
.article-content h4{font-size:17px;margin:22px 0 10px;color:#DCE6FA}
.article-content ul,.article-content ol{padding-left:22px;margin:0 0 18px}
.article-content ul{list-style:disc}
.article-content ol{list-style:decimal}
.article-content li{margin:8px 0;padding-left:2px}
.article-content ul li::marker{color:var(--accent);font-size:1.05em}
.article-content ol li::marker{color:var(--accent);font-weight:600}
.article-content a{color:var(--link);border-bottom:1px solid rgba(127,178,255,.35)}
.article-content a:hover{color:var(--accent);border-bottom-color:var(--accent);text-decoration:none}
.article-content blockquote{
  margin:22px 0;padding:16px 20px;border-left:3px solid var(--accent);
  background:rgba(255,255,255,.04);border-radius:0 12px 12px 0;color:#CBD8EE;
}
.article-content blockquote p:last-child{margin-bottom:0}
.article-content img{border-radius:12px;margin:24px auto;box-shadow:var(--shadow)}
.article-content figure{margin:24px 0}
.article-content figcaption{font-size:13px;color:var(--text-muted);text-align:center;margin-top:10px}
.article-content table{
  width:100%;border-collapse:collapse;margin:24px 0;font-size:14.5px;
  border:1px solid var(--line);border-radius:12px;overflow:hidden;
}
.article-content th{background:rgba(255,255,255,.06);color:var(--text-title);font-weight:600;text-align:left}
.article-content th,.article-content td{padding:12px 14px;border-bottom:1px solid var(--line)}
.article-content tbody tr:nth-child(even){background:rgba(255,255,255,.03)}
.article-content tbody tr:last-child td{border-bottom:0}
.article-content pre{
  background:#060B16;border:1px solid var(--line);border-radius:12px;padding:16px;overflow-x:auto;
  font-size:14px;line-height:1.7;color:#BFD0EA;
}
.article-content code{font-family:"JetBrains Mono","Consolas",monospace;font-size:.94em}
.article-content p code,.article-content li code{
  background:rgba(47,224,200,.1);color:#9FF0E2;padding:2px 6px;border-radius:6px;
}
.tip-box{
  margin:26px 0;padding:18px 20px;border-radius:12px;
  background:var(--glass);border:1px solid rgba(255,255,255,.1);
  backdrop-filter:blur(8px);
}
.tip-box strong{display:block;color:var(--accent);font-size:14px;margin-bottom:6px;letter-spacing:.02em}
.tip-box p{margin:0;font-size:15px;color:var(--text-read)}

/* 空态 */
.empty-state{
  max-width:760px;text-align:center;padding:56px 28px;border-radius:16px;
  background:var(--bg-panel);border:1px dashed rgba(255,255,255,.16);
}
.empty-state .empty-icon{
  width:56px;height:56px;margin:0 auto 16px;border-radius:14px;display:flex;align-items:center;justify-content:center;
  border:1px solid var(--line);background:var(--glass);
}
.empty-state .empty-icon svg{width:26px;height:26px;stroke:var(--accent);fill:none;stroke-width:1.6}
.empty-state h2{font-size:22px;margin-bottom:10px}
.empty-state p{color:var(--text-muted);font-size:15px;margin-bottom:22px}

/* ============ 侧栏 ============ */
.article-side{display:flex;flex-direction:column;gap:20px;position:sticky;top:96px}
.side-card{
  background:var(--bg-panel);border:1px solid var(--line);border-radius:14px;padding:20px;
  box-shadow:var(--shadow);
}
.side-title{
  font-size:15px;font-weight:600;color:var(--text-title);margin-bottom:14px;
  display:flex;align-items:center;gap:8px;
}
.side-title::before{content:"";width:3px;height:14px;border-radius:2px;background:var(--accent)}
.toc-list{display:flex;flex-direction:column;gap:2px;max-height:340px;overflow-y:auto}
.toc-list a{
  display:block;padding:8px 12px;border-radius:8px;font-size:14px;color:var(--text-body);
  border-left:2px solid transparent;line-height:1.55;
}
.toc-list a:hover{background:rgba(255,255,255,.04);color:var(--text-title);text-decoration:none}
.toc-list a.active{color:var(--accent);border-left-color:var(--accent);background:rgba(47,224,200,.07)}
.related-item{display:flex;gap:12px;align-items:center;padding:10px;border-radius:12px;transition:background .22s var(--ease)}
.related-item:hover{background:rgba(255,255,255,.05);text-decoration:none}
.related-item img{width:64px;height:64px;border-radius:8px;object-fit:cover;flex:0 0 auto}
.related-meta{display:flex;flex-direction:column;gap:4px;min-width:0}
.related-meta strong{font-size:14px;color:var(--text-title);font-weight:600;line-height:1.5}
.related-meta em{font-style:normal;font-size:12.5px;color:var(--text-muted)}
.side-cta{background:linear-gradient(160deg,rgba(44,107,255,.16),rgba(47,224,200,.08));border-color:rgba(47,224,200,.28)}
.side-cta p{font-size:14px;color:var(--text-read);margin:0 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:var(--radius-btn);font-size:15px;font-weight:600;border:1px solid transparent;
  transition:all .24s var(--ease);white-space:nowrap;
}
.btn:hover{text-decoration:none}
.btn-primary{
  color:#fff;background:linear-gradient(135deg,#2C6BFF,#1B4FD8);
  box-shadow:0 6px 18px rgba(44,107,255,.4);
}
.btn-primary:hover{
  color:#fff;filter:brightness(1.08);transform:translateY(-1px);
  box-shadow:0 0 0 1px rgba(47,224,200,.35),0 8px 30px rgba(44,107,255,.45);
}
.btn-primary:active{transform:translateY(1px);box-shadow:0 3px 12px rgba(44,107,255,.32)}
.btn-ghost{
  color:var(--text-title);background:var(--glass);border-color:var(--line);
  backdrop-filter:blur(8px);
}
.btn-ghost:hover{color:var(--text-title);border-color:rgba(47,224,200,.5);background:rgba(47,224,200,.08)}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-block{width:100%}

/* ============ 文末导航 + CTA ============ */
.post-nav{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:36px 0 0;max-width:760px}
.post-nav a{
  display:flex;flex-direction:column;gap:6px;padding:20px;border-radius:14px;
  background:var(--bg-panel);border:1px solid var(--line);box-shadow:var(--shadow);
  transition:transform .24s var(--ease),border-color .24s var(--ease),box-shadow .24s var(--ease);
}
.post-nav a:hover{text-decoration:none;transform:translateY(-3px);border-color:var(--line-strong);box-shadow:var(--shadow-lg)}
.post-nav span{font-size:12.5px;color:var(--text-muted)}
.post-nav strong{font-size:16px;color:var(--text-title);font-weight:600;line-height:1.5}
.back-row{margin:24px 0 0;max-width:760px}
.cta-bar{
  margin:44px auto 0;max-width:1120px;padding:30px 32px;border-radius:16px;
  display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;
  background:linear-gradient(135deg,rgba(44,107,255,.18),rgba(47,224,200,.1));
  border:1px solid rgba(47,224,200,.28);
  backdrop-filter:blur(10px);
  box-shadow:var(--glow);
}
.cta-bar h2{font-size:22px;margin-bottom:8px}
.cta-bar p{font-size:14.5px;color:var(--text-read);max-width:620px}

/* ============ 页脚 ============ */
.site-footer{
  margin-top:80px;background:#060A12;border-top:1px solid var(--line);
  position:relative;z-index:1;padding:56px 0 0;
}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:32px;padding-bottom:36px}
.footer-brand p{font-size:14px;color:var(--text-muted);line-height:1.85;margin-top:16px;max-width:340px}
.footer-col h4{font-size:14px;font-weight:600;margin-bottom:16px;color:var(--text-title)}
.footer-col a{display:block;font-size:14px;color:var(--text-muted);padding:5px 0}
.footer-col a:hover{color:var(--accent);text-decoration:none}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;
  padding:20px 0;border-top:1px solid var(--line);font-size:13px;color:var(--text-muted);
}
.footer-bottom a{color:var(--text-muted)}
.footer-bottom a:hover{color:var(--accent)}

/* ============ 回到顶部 ============ */
.back-top{
  position:fixed;right:24px;bottom:28px;width:56px;height:56px;border-radius:50%;z-index:80;
  display:flex;align-items:center;justify-content:center;
  background:var(--glass);border:1px solid var(--line);color:var(--accent);
  backdrop-filter:blur(12px);box-shadow:var(--shadow);
  opacity:0;visibility:hidden;transform:translateY(12px);
  transition:all .28s var(--ease);
}
.back-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.back-top:hover{border-color:rgba(47,224,200,.6);box-shadow:0 0 0 1px rgba(47,224,200,.3),0 10px 26px rgba(0,0,0,.5)}
.back-top svg{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round}

/* ============ 响应式 ============ */
@media (max-width:1280px){
  .article-layout{grid-template-columns:minmax(0,1fr) 290px;gap:32px}
}
@media (max-width:1024px){
  .top-links{display:none}
  .nav-toggle{display:block}
  .search-box{width:100%}
  .article-layout{grid-template-columns:1fr}
  .article-side{position:static;flex-direction:column}
  .article-content{padding:28px 24px;max-width:none}
  .empty-state{max-width:none}
  .post-nav,.back-row{max-width:none}
  .article-hero h1{font-size:30px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:768px){
  .container{padding:0 20px}
  .header-top{height:64px}
  .logo-text{font-size:16px}
  .article-hero h1{font-size:26px;line-height:1.45}
  .page-hero{padding:32px 0 30px}
  .article-wrap{padding:40px 0 56px}
  .article-content{font-size:15.5px;line-height:1.88;padding:24px 18px}
  .article-content h2{font-size:22px;margin:34px 0 14px}
  .article-content h3{font-size:18px}
  .post-nav{grid-template-columns:1fr}
  .cta-bar{flex-direction:column;align-items:flex-start;padding:24px 22px}
  .site-footer{margin-top:56px;padding-top:44px}
  .footer-grid{grid-template-columns:1fr;gap:24px}
  .footer-brand p{max-width:none}
  .back-top{right:16px;bottom:18px;width:48px;height:48px}
}
@media (max-width:560px){
  body::after{display:none}
  body::before{display:none}
  .search-box{flex-wrap:wrap;height:auto;padding:12px;gap:10px}
  .search-box input{width:100%;height:36px}
  .btn-search{width:100%;height:42px}
  .meta-row{gap:8px}
  .article-hero h1{font-size:23px}
  .badge{height:26px;font-size:12px}
  .cta-bar{padding:20px 18px}
  .side-card{padding:16px}
}
@media (max-width:380px){
  .container{padding:0 16px}
  .logo-text{font-size:15px}
  .article-hero h1{font-size:21px}
  .article-content{padding:20px 14px}
  .meta-row{flex-direction:column;align-items:flex-start;gap:6px}
  .meta-row .dot{display:none}
  .btn{width:100%}
  .post-nav a{padding:16px}
}

/* roulang page: category1 */
:root{
  --bg-base:#070C18;
  --bg-panel:#0D1526;
  --bg-elev:#121C33;
  --glass:rgba(255,255,255,.06);
  --brand:#2C6BFF;
  --brand-hi:#5B94FF;
  --accent:#2FE0C8;
  --accent-2:#7A5CFF;
  --warn:#FFB454;
  --text-1:#EAF1FF;
  --text-2:#A9B8D6;
  --text-3:#6C7C9C;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.18);
  --link:#7FB2FF;
  --radius-card:12px;
  --radius-btn:10px;
  --radius-input:12px;
  --radius-pill:999px;
  --shadow-card:0 8px 24px rgba(0,0,0,.45);
  --shadow-card-hover:0 16px 32px rgba(0,0,0,.52);
  --glow:0 0 0 1px rgba(47,224,200,.35),0 8px 30px rgba(44,107,255,.45);
  --font:"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",sans-serif;
  --num:"Inter","DIN Alternate","PingFang SC",sans-serif;
  --ease:cubic-bezier(.22,.61,.36,1);
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:140px;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.8;
  color:var(--text-2);
  background-color:var(--bg-base);
  background-image:
    linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:24px 24px;
  background-position:0 0;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg,transparent,rgba(47,224,200,.85),rgba(44,107,255,.85),transparent);
  z-index:120;
  pointer-events:none;
}
img{max-width:100%;display:block;border:0;}
a{color:var(--link);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--accent);text-decoration:underline;text-underline-offset:2px;}
button{font-family:inherit;font-size:inherit;}
h1,h2,h3,h4{color:var(--text-1);margin:0;font-weight:700;line-height:1.35;}
p{margin:0;}
ul,ol{margin:0;padding:0;}
.container{max-width:1240px;margin:0 auto;padding:0 24px;}

/* ---------- header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(7,12,24,.78);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  transition:background .3s ease;
}
.site-header::after{
  content:"";
  position:absolute;left:0;right:0;bottom:-1px;height:1px;
  background:linear-gradient(90deg,transparent,rgba(47,224,200,.5),transparent);
  pointer-events:none;
}
.header-top{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  height:70px;
  transition:height .3s ease;
}
.logo{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:var(--text-1);
  font-size:18px;
  font-weight:700;
  letter-spacing:.02em;
  white-space:nowrap;
}
.logo:hover{color:var(--text-1);text-decoration:none;}
.logo-mark{
  width:34px;height:34px;
  flex:0 0 34px;
  border-radius:10px;
  background:linear-gradient(135deg,#2C6BFF,#1B4FD8);
  display:grid;place-items:center;
  box-shadow:0 6px 18px rgba(44,107,255,.35);
}
.logo-mark svg{width:19px;height:19px;}
.logo-text{line-height:1;}
.top-links{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:28px;
  flex:1 1 auto;
}
.top-links a{
  position:relative;
  padding:6px 0;
  font-size:15px;
  color:var(--text-2);
}
.top-links a:hover{color:var(--text-1);text-decoration:none;}
.top-links a.active{color:var(--text-1);}
.top-links a.active::after{
  content:"";
  position:absolute;left:0;right:0;bottom:-3px;height:2px;
  border-radius:2px;
  background:linear-gradient(90deg,var(--brand),var(--accent));
}
.nav-toggle{
  display:none;
  width:42px;height:42px;
  border-radius:10px;
  border:1px solid var(--line);
  background:var(--glass);
  cursor:pointer;
  position:relative;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after{
  position:absolute;
  left:11px;right:11px;height:2px;
  border-radius:2px;
  background:var(--text-1);
  content:"";
  transition:transform .25s var(--ease),opacity .2s ease;
}
.nav-toggle span{top:20px;left:12px;right:12px;}
.nav-toggle span::before{left:0;right:0;top:-6px;}
.nav-toggle span::after{left:0;right:0;top:6px;}
.site-header.menu-open .nav-toggle span{background:transparent;}
.site-header.menu-open .nav-toggle span::before{transform:translateY(6px) rotate(45deg);}
.site-header.menu-open .nav-toggle span::after{transform:translateY(-6px) rotate(-45deg);}

.header-search-row{display:flex;justify-content:center;padding-bottom:14px;}
.search-box{
  position:relative;
  display:flex;
  align-items:center;
  width:52%;
  min-width:320px;
  height:48px;
  padding:0 6px 0 44px;
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--radius-input);
  transition:border-color .22s ease,box-shadow .22s ease;
}
.search-box:focus-within{
  border-color:var(--accent);
  box-shadow:0 0 0 3px rgba(47,224,200,.15),0 0 24px rgba(47,224,200,.12);
}
.search-box svg{
  position:absolute;
  left:14px;top:50%;
  width:20px;height:20px;
  transform:translateY(-50%);
  stroke:var(--text-3);
  transition:stroke .22s ease;
}
.search-box:focus-within svg{stroke:var(--accent);}
.search-box input{
  flex:1 1 auto;
  height:100%;
  min-width:0;
  background:transparent;
  border:0;
  outline:none;
  color:var(--text-1);
  font-size:15px;
  font-family:inherit;
}
.search-box input::placeholder{color:var(--text-3);}
.btn-search{
  flex:0 0 auto;
  height:38px;
  padding:0 24px;
  border:0;
  border-radius:9px;
  background:linear-gradient(135deg,#2C6BFF,#1B4FD8);
  color:#fff;
  font-size:15px;
  font-weight:600;
  cursor:pointer;
  box-shadow:0 0 0 1px rgba(47,224,200,.28),0 6px 18px rgba(44,107,255,.4);
  transition:transform .2s var(--ease),filter .2s ease,box-shadow .25s ease;
}
.btn-search:hover{filter:brightness(1.08);transform:translateY(-1px);box-shadow:0 0 0 1px rgba(47,224,200,.45),0 8px 22px rgba(44,107,255,.5);}
.btn-search:active{transform:translateY(1px);}
.btn-search:focus-visible{outline:2px solid var(--accent);outline-offset:2px;}

.header-caps{
  display:flex;
  gap:10px;
  padding-bottom:14px;
  overflow-x:auto;
  max-height:80px;
  transition:max-height .3s ease,opacity .25s ease,padding .3s ease;
  scrollbar-width:none;
}
.header-caps::-webkit-scrollbar{display:none;}
.cap{
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:7px 16px;
  border-radius:var(--radius-pill);
  border:1px solid var(--line);
  color:var(--text-2);
  font-size:14px;
  white-space:nowrap;
  transition:border-color .22s ease,color .22s ease,background .22s ease;
}
.cap:hover{border-color:var(--line-strong);color:var(--text-1);text-decoration:none;}
.cap i{width:5px;height:5px;border-radius:50%;background:var(--text-3);transition:background .22s ease;}
.cap.active{
  border-color:var(--accent);
  background:rgba(47,224,200,.08);
  color:var(--text-1);
}
.cap.active i{background:var(--accent);}

.site-header.is-scrolled{background:rgba(7,12,24,.9);}
.site-header.is-scrolled .header-top{height:58px;}
.site-header.is-scrolled .header-caps{max-height:0;opacity:0;padding-bottom:0;overflow:hidden;}

/* ---------- banner ---------- */
.page-banner{
  position:relative;
  min-height:280px;
  display:flex;
  align-items:flex-end;
  padding:56px 0 40px;
  background-image:
    linear-gradient(90deg,rgba(7,12,24,.94) 0%,rgba(7,12,24,.72) 55%,rgba(7,12,24,.55) 100%),
    url('/assets/images/backpic/back-1.png');
  background-size:cover;
  background-position:center;
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.page-banner::after{
  content:"";
  position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:24px 24px;
  pointer-events:none;
}
.banner-inner{position:relative;z-index:2;}
.breadcrumb{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:13px;
  color:var(--text-3);
  margin-bottom:18px;
  flex-wrap:wrap;
}
.breadcrumb a{color:var(--text-3);}
.breadcrumb a:hover{color:var(--accent);text-decoration:none;}
.breadcrumb span.sep{opacity:.6;}
.breadcrumb .current{color:var(--text-2);}
.banner-inner h1{
  font-size:44px;
  line-height:1.25;
  letter-spacing:-.01em;
  margin-bottom:14px;
}
.banner-inner p{
  max-width:760px;
  font-size:16px;
  line-height:1.85;
  color:var(--text-2);
}
.banner-meta{
  display:flex;
  gap:10px;
  flex-wrap:wrap;
  margin-top:20px;
}
.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 13px;
  border-radius:var(--radius-pill);
  font-size:13px;
  border:1px solid var(--line);
  color:var(--text-2);
  background:var(--glass);
}
.badge-accent{border-color:rgba(47,224,200,.4);color:var(--accent);background:rgba(47,224,200,.08);}
.badge-violet{border-color:rgba(122,92,255,.45);color:#B4A3FF;background:rgba(122,92,255,.12);}

/* ---------- layout ---------- */
.section{padding:88px 0;}
.section-tight{padding:64px 0;}
.layout{
  display:grid;
  grid-template-columns:274px minmax(0,1fr);
  gap:48px;
  align-items:start;
}
.toc{
  position:sticky;
  top:132px;
  padding:24px 10px 24px 18px;
  background:var(--bg-panel);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);
}
.toc-title{
  font-size:12px;
  letter-spacing:.16em;
  color:var(--text-3);
  margin-bottom:14px;
  padding-left:2px;
}
.toc-nav{display:flex;flex-direction:column;gap:2px;}
.toc-nav a{
  display:block;
  padding:10px 12px 10px 16px;
  border-left:2px solid transparent;
  border-radius:0 8px 8px 0;
  font-size:14px;
  line-height:1.6;
  color:var(--text-2);
  transition:color .2s ease,border-color .2s ease,background .2s ease;
}
.toc-nav a:hover{color:var(--text-1);text-decoration:none;background:rgba(255,255,255,.04);}
.toc-nav a.active{
  color:var(--text-1);
  border-left-color:var(--accent);
  background:linear-gradient(90deg,rgba(47,224,200,.12),transparent);
}
.toc-note{
  margin-top:20px;
  padding-top:18px;
  border-top:1px solid var(--line);
  font-size:13px;
  line-height:1.8;
  color:var(--text-3);
}
.toc-note a{font-size:13px;}

/* ---------- chapters ---------- */
.chapter{
  position:relative;
  padding-bottom:52px;
  margin-bottom:52px;
  border-bottom:1px solid var(--line);
}
.chapter:last-of-type{border-bottom:0;margin-bottom:0;padding-bottom:0;}
.chapter-head{
  display:flex;
  align-items:center;
  gap:14px;
  margin-bottom:26px;
}
.chapter-num{
  flex:0 0 auto;
  font-family:var(--num);
  font-size:13px;
  font-weight:700;
  letter-spacing:.06em;
  color:var(--accent);
  border:1px solid rgba(47,224,200,.4);
  background:rgba(47,224,200,.06);
  border-radius:6px;
  padding:3px 9px;
  font-variant-numeric:tabular-nums;
}
.chapter-head h2{
  position:relative;
  padding-left:16px;
  font-size:32px;
  line-height:1.4;
}
.chapter-head h2::before{
  content:"";
  position:absolute;left:0;top:9px;bottom:9px;width:3px;
  border-radius:2px;
  background:linear-gradient(180deg,var(--accent),var(--brand));
}
.split{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:32px;
  align-items:center;
}
.split.flip .split-media{order:-1;}
.split-text p{font-size:16px;line-height:1.9;color:var(--text-2);margin-bottom:18px;}
.split-text p:last-child{margin-bottom:0;}
.split-text strong{color:var(--text-1);font-weight:600;}
.split-media{
  margin:0;
  border-radius:var(--radius-card);
  overflow:hidden;
  border:1px solid var(--line);
  background:var(--bg-panel);
  box-shadow:var(--shadow-card);
  transition:border-color .24s var(--ease),box-shadow .24s var(--ease),transform .24s var(--ease);
}
.split-media img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.split-media figcaption{
  padding:12px 16px;
  font-size:13px;
  color:var(--text-3);
  border-top:1px solid var(--line);
}

/* ---------- checklist ---------- */
.checklist{
  margin-top:28px;
  padding:32px;
  border-radius:var(--radius-card);
  background:var(--bg-panel);
  border:1px solid var(--line);
}
.checklist h3{font-size:22px;line-height:1.5;margin-bottom:20px;}
.checklist ul{list-style:none;display:grid;gap:14px;}
.checklist li{
  position:relative;
  padding-left:30px;
  font-size:16px;
  line-height:1.8;
  color:var(--text-2);
}
.checklist li::before{
  content:"";
  position:absolute;
  left:0;top:11px;
  width:11px;height:11px;
  border-radius:3px;
  border:1px solid var(--accent);
  background:rgba(47,224,200,.18);
}

/* ---------- CTA ---------- */
.cta-bar{
  margin-top:8px;
  padding:36px;
  border-radius:var(--radius-card);
  background:linear-gradient(135deg,rgba(44,107,255,.18),rgba(47,224,200,.07));
  border:1px solid var(--line-strong);
  display:grid;
  grid-template-columns:1.35fr 1fr;
  gap:32px;
  align-items:center;
}
.cta-bar h3{font-size:24px;line-height:1.5;margin-bottom:10px;}
.cta-bar p{font-size:15px;line-height:1.85;color:var(--text-2);}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;justify-content:flex-end;}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 24px;
  border-radius:var(--radius-btn);
  border:1px solid transparent;
  font-size:15px;
  font-weight:600;
  cursor:pointer;
  white-space:nowrap;
  transition:transform .2s var(--ease),box-shadow .25s ease,background .25s ease,color .2s ease,border-color .2s ease,filter .2s ease;
}
.btn:hover{text-decoration:none;}
.btn-primary{
  background:linear-gradient(135deg,#2C6BFF,#1B4FD8);
  color:#fff;
  box-shadow:var(--glow);
}
.btn-primary:hover{color:#fff;filter:brightness(1.08);transform:translateY(-1px);box-shadow:0 0 0 1px rgba(47,224,200,.5),0 12px 34px rgba(44,107,255,.55);}
.btn-primary:active{transform:translateY(1px);box-shadow:0 4px 14px rgba(44,107,255,.4);}
.btn-ghost{
  background:var(--glass);
  border-color:var(--line);
  color:var(--text-1);
}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent);background:rgba(47,224,200,.08);}
.btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px;}

/* ---------- FAQ ---------- */
.faq-block{padding-top:12px;}
.faq-block h2{font-size:32px;margin-bottom:8px;}
.faq-block .faq-sub{font-size:15px;color:var(--text-3);margin-bottom:28px;}
.faq-list{border-top:1px solid var(--line);}
.faq-item{
  border-bottom:1px solid var(--line);
  transition:background .22s ease;
}
.faq-item summary{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  min-height:64px;
  padding:16px 4px;
  list-style:none;
  cursor:pointer;
  font-size:16px;
  line-height:1.7;
  color:var(--text-1);
  font-weight:600;
  transition:color .2s ease,border-color .22s ease,padding .22s ease;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"";
  flex:0 0 auto;
  width:10px;height:10px;
  border-right:2px solid var(--text-3);
  border-bottom:2px solid var(--text-3);
  transform:rotate(45deg) translateY(-3px);
  transition:transform .22s var(--ease),border-color .22s ease;
}
.faq-item summary:hover{color:var(--accent);}
.faq-item[open] summary{border-left:3px solid var(--accent);padding-left:16px;}
.faq-item[open] summary::after{transform:rotate(225deg) translateY(-3px);border-color:var(--accent);}
.faq-body{
  padding:2px 4px 22px 4px;
  animation:fadeSlide .22s ease-out;
}
.faq-body p{font-size:15px;line-height:1.85;color:var(--text-2);}
@keyframes fadeSlide{
  from{opacity:0;transform:translateY(-4px);}
  to{opacity:1;transform:translateY(0);}
}

/* ---------- footer ---------- */
.site-footer{
  margin-top:24px;
  background:#060A12;
  border-top:1px solid var(--line);
  padding:64px 0 0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1fr;
  gap:40px;
  padding-bottom:48px;
}
.footer-brand .logo{margin-bottom:16px;}
.footer-brand p{font-size:14px;line-height:1.9;color:var(--text-3);max-width:360px;}
.footer-col h4{
  font-size:14px;
  font-weight:600;
  color:var(--text-1);
  margin-bottom:16px;
}
.footer-col a{
  display:block;
  font-size:14px;
  line-height:2.1;
  color:var(--text-3);
}
.footer-col a:hover{color:var(--accent);text-decoration:none;}
.footer-bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  padding:22px 0;
  border-top:1px solid var(--line);
  font-size:13px;
  color:var(--text-3);
}
.footer-bottom a{color:var(--text-3);}
.footer-bottom a:hover{color:var(--accent);text-decoration:none;}

/* ---------- to top ---------- */
.to-top{
  position:fixed;
  right:28px;bottom:28px;
  width:56px;height:56px;
  border-radius:50%;
  display:grid;place-items:center;
  background:rgba(255,255,255,.06);
  border:1px solid var(--line-strong);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  color:var(--accent);
  cursor:pointer;
  opacity:0;
  visibility:hidden;
  transform:translateY(12px);
  transition:opacity .25s ease,transform .25s var(--ease),visibility .25s;
  z-index:70;
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{border-color:var(--accent);box-shadow:0 0 0 1px rgba(47,224,200,.35),0 8px 24px rgba(0,0,0,.5);}
.to-top svg{width:22px;height:22px;stroke:var(--accent);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;}

/* ---------- responsive ---------- */
@media (max-width:1280px){
  .banner-inner h1{font-size:38px;}
  .chapter-head h2{font-size:28px;}
}
@media (max-width:1024px){
  .nav-toggle{display:block;}
  .top-links{
    position:absolute;
    left:24px;right:24px;top:70px;
    flex-direction:column;
    align-items:flex-start;
    gap:4px;
    padding:16px;
    background:rgba(9,15,28,.97);
    border:1px solid var(--line);
    border-radius:var(--radius-card);
    box-shadow:var(--shadow-card-hover);
    display:none;
  }
  .top-links a{width:100%;padding:10px 4px;}
  .top-links a.active::after{display:none;}
  .site-header.menu-open .top-links{display:flex;}
  .header-search-row{padding-top:4px;}
  .search-box{width:100%;min-width:0;}
  .layout{grid-template-columns:1fr;gap:32px;}
  .toc{position:static;padding:20px;}
  .toc-nav{flex-direction:row;flex-wrap:wrap;gap:8px;}
  .toc-nav a{border-left:0;border:1px solid var(--line);border-radius:999px;padding:8px 14px;font-size:13px;}
  .toc-nav a.active{border-color:var(--accent);background:rgba(47,224,200,.1);}
  .toc-note{display:none;}
  .split{grid-template-columns:1fr;gap:24px;}
  .split.flip .split-media{order:0;}
  .cta-bar{grid-template-columns:1fr;gap:24px;}
  .cta-actions{justify-content:flex-start;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:768px){
  .section{padding:56px 0;}
  .page-banner{padding:40px 0 32px;min-height:auto;}
  .banner-inner h1{font-size:30px;}
  .banner-inner p{font-size:15px;}
  .chapter-head h2{font-size:24px;}
  .chapter{padding-bottom:36px;margin-bottom:36px;}
  .checklist{padding:24px;}
  .checklist h3{font-size:19px;}
  .cta-bar{padding:26px;}
  .cta-bar h3{font-size:20px;}
  .faq-block h2{font-size:24px;}
  .faq-item summary{font-size:15px;min-height:60px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .site-footer{padding-top:48px;}
  .split-media img{aspect-ratio:16/11;}
}
@media (max-width:560px){
  body{
    background-image:none;
  }
  body::before{display:none;}
  .page-banner::after{display:none;}
  .container{padding:0 18px;}
  .header-search-row{flex-direction:column;}
  .search-box{padding-right:6px;}
  .btn-search{padding:0 18px;}
  .header-top{height:62px;}
  .top-links{top:62px;left:18px;right:18px;}
  .banner-inner h1{font-size:26px;line-height:1.35;}
  .banner-meta{gap:8px;}
  .btn{width:100%;}
  .cta-actions{flex-direction:column;width:100%;}
  .to-top{right:16px;bottom:16px;width:48px;height:48px;}
}
@media (max-width:380px){
  .container{padding:0 16px;}
  .logo-text{font-size:16px;}
  .banner-inner h1{font-size:23px;}
  .chapter-head{flex-wrap:wrap;gap:10px;}
  .chapter-head h2{font-size:21px;padding-left:12px;}
  .breadcrumb{font-size:12px;}
  .badge{font-size:12px;padding:4px 10px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}

/* roulang page: category2 */
:root{
  --bg-base:#070C18;
  --bg-panel:#0D1526;
  --bg-elev:#121C33;
  --glass:rgba(255,255,255,.06);
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.18);
  --brand:#2C6BFF;
  --brand-deep:#1B4FD8;
  --brand-hi:#5B94FF;
  --accent:#2FE0C8;
  --accent-2:#7A5CFF;
  --warn:#FFB454;
  --text:#EAF1FF;
  --text-2:#A9B8D6;
  --text-3:#6C7C9C;
  --link:#7FB2FF;
  --radius:12px;
  --radius-btn:10px;
  --shadow:0 8px 24px rgba(0,0,0,.45);
  --shadow-lg:0 8px 32px rgba(0,0,0,.55);
  --glow:0 0 0 1px rgba(47,224,200,.35),0 8px 30px rgba(44,107,255,.45);
  --ease:cubic-bezier(.22,.61,.36,1);
  --font:"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.8;
  color:var(--text-2);
  background-color:var(--bg-base);
  background-image:
    linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:24px 24px;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  top:0;left:0;right:0;
  height:2px;
  background:linear-gradient(90deg,transparent,var(--brand) 30%,var(--accent) 55%,transparent);
  opacity:.75;
  z-index:60;
  pointer-events:none;
}
h1,h2,h3,h4{margin:0;color:var(--text);font-weight:600;letter-spacing:.01em;}
h1{font-size:44px;line-height:1.24;}
h2{font-size:32px;line-height:1.36;}
h3{font-size:22px;line-height:1.45;}
p{margin:0;}
img{max-width:100%;display:block;border-radius:var(--radius);}
a{color:var(--link);text-decoration:none;transition:color .2s var(--ease),border-color .2s var(--ease);}
a:hover{color:var(--accent);}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{
  outline:2px solid var(--accent);
  outline-offset:2px;
}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;cursor:pointer;}
input,select,textarea{font-family:inherit;font-size:15px;color:var(--text);}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px;}
.num{font-variant-numeric:tabular-nums;font-weight:700;letter-spacing:-.02em;}

/* ============ 导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:50;
  background:rgba(7,12,24,.72);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  transition:background .3s var(--ease),box-shadow .3s var(--ease);
}
.site-header.is-stuck{
  background:rgba(7,12,24,.88);
  box-shadow:0 10px 30px rgba(0,0,0,.5);
}
.header-top{
  display:flex;
  align-items:center;
  gap:20px;
  height:72px;
  transition:height .3s var(--ease);
}
.site-header.is-stuck .header-top{height:60px;}
.logo{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:var(--text);
  font-weight:700;
  letter-spacing:.02em;
  font-size:17px;
  flex-shrink:0;
}
.logo:hover{color:var(--text);}
.logo-mark{
  width:34px;height:34px;
  border-radius:10px;
  display:grid;place-items:center;
  background:linear-gradient(135deg,var(--brand),var(--brand-deep));
  box-shadow:0 6px 18px rgba(44,107,255,.4);
  flex-shrink:0;
}
.logo-mark svg{width:20px;height:20px;}
.logo-text{white-space:nowrap;}
.top-links{
  display:flex;
  align-items:center;
  gap:6px;
  margin-left:auto;
}
.top-links a{
  color:var(--text-2);
  font-size:15px;
  padding:8px 14px;
  border-radius:999px;
  border:1px solid transparent;
  transition:all .2s var(--ease);
  white-space:nowrap;
}
.top-links a:hover{color:var(--text);background:var(--glass);border-color:var(--line);}
.top-links a.active{
  color:var(--accent);
  border-color:rgba(47,224,200,.35);
  background:rgba(47,224,200,.08);
}
.nav-toggle{
  display:none;
  margin-left:auto;
  width:44px;height:40px;
  border-radius:10px;
  border:1px solid var(--line);
  background:var(--glass);
  position:relative;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after{
  position:absolute;
  left:50%;
  width:18px;height:2px;
  background:var(--text);
  border-radius:2px;
  transform:translateX(-50%);
  transition:transform .25s var(--ease),opacity .25s var(--ease);
}
.nav-toggle span{top:19px;}
.nav-toggle span::before{content:"";top:-6px;left:0;transform:none;}
.nav-toggle span::after{content:"";top:6px;left:0;transform:none;}
.site-header.drawer-open .nav-toggle span{transform:translateX(-50%) rotate(45deg);}
.site-header.drawer-open .nav-toggle span::before{transform:rotate(-90deg);top:0;}
.site-header.drawer-open .nav-toggle span::after{opacity:0;}

.header-search-row{padding:4px 24px 14px;}
.search-box{
  position:relative;
  display:flex;
  align-items:center;
  width:52%;
  min-width:320px;
  margin:0 auto;
  height:48px;
  border-radius:var(--radius);
  background:var(--glass);
  border:1px solid var(--line);
  padding:0 6px 0 16px;
  transition:border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.search-box:focus-within{
  border-color:rgba(47,224,200,.6);
  box-shadow:0 0 0 3px rgba(47,224,200,.12);
}
.search-box svg{width:20px;height:20px;stroke:var(--text-3);flex-shrink:0;}
.search-box input{
  flex:1;
  height:100%;
  border:0;
  background:transparent;
  padding:0 12px;
  outline:none;
}
.search-box input::placeholder{color:var(--text-3);}
.btn-search{
  height:38px;
  padding:0 22px;
  border:0;
  border-radius:10px;
  color:#fff;
  font-weight:600;
  font-size:15px;
  background:linear-gradient(135deg,var(--brand),var(--brand-deep));
  box-shadow:0 0 0 1px rgba(47,224,200,.28),0 8px 22px rgba(44,107,255,.42);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),filter .2s var(--ease);
  white-space:nowrap;
}
.btn-search:hover{filter:brightness(1.08);transform:translateY(-1px);}
.btn-search:active{transform:translateY(1px);box-shadow:0 0 0 1px rgba(47,224,200,.2),0 4px 12px rgba(44,107,255,.3);}
.header-caps{
  display:flex;
  gap:10px;
  padding:0 24px 14px;
  overflow-x:auto;
  scrollbar-width:none;
}
.header-caps::-webkit-scrollbar{display:none;}
.cap{
  display:inline-flex;
  align-items:center;
  gap:7px;
  flex-shrink:0;
  height:34px;
  padding:0 15px;
  border-radius:999px;
  border:1px solid var(--line);
  color:var(--text-2);
  font-size:13.5px;
  background:rgba(255,255,255,.03);
  transition:all .2s var(--ease);
}
.cap i{
  width:6px;height:6px;
  border-radius:2px;
  background:var(--accent-2);
  transform:rotate(45deg);
  flex-shrink:0;
}
.cap:hover{color:var(--text);border-color:var(--line-strong);}
.cap.active{
  color:var(--accent);
  border-color:rgba(47,224,200,.45);
  background:rgba(47,224,200,.08);
}

/* ============ 页头横幅 ============ */
.page-banner{
  position:relative;
  border-bottom:1px solid var(--line);
  background-image:linear-gradient(180deg,rgba(7,12,24,.72),rgba(7,12,24,.94)),url("/assets/images/backpic/back-2.webp");
  background-size:cover;
  background-position:center;
}
.banner-inner{padding:26px 24px 46px;}
.breadcrumb{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--text-3);
  flex-wrap:wrap;
}
.breadcrumb a{color:var(--text-3);}
.breadcrumb a:hover{color:var(--accent);}
.breadcrumb em{font-style:normal;color:var(--text-2);}
.banner-grid{
  display:grid;
  grid-template-columns:7fr 5fr;
  gap:44px;
  align-items:center;
  margin-top:26px;
  min-height:200px;
}
.badge{
  display:inline-flex;
  align-items:center;
  height:28px;
  padding:0 13px;
  border-radius:999px;
  font-size:13px;
  letter-spacing:.02em;
}
.badge-accent2{
  color:#CBBFFF;
  border:1px solid rgba(122,92,255,.55);
  background:rgba(122,92,255,.12);
}
.banner-copy h1{margin:16px 0 14px;}
.banner-copy p{font-size:17px;line-height:1.9;color:var(--text-2);max-width:620px;}
.banner-card{
  border-radius:var(--radius);
  border:1px solid var(--line);
  background:var(--glass);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  box-shadow:var(--shadow);
  padding:24px;
  position:relative;
}
.banner-card::before{
  content:"";
  position:absolute;inset:0;
  border-radius:var(--radius);
  border:1px solid rgba(255,255,255,.08);
  pointer-events:none;
}
.banner-card h3{font-size:16px;margin-bottom:14px;color:var(--text);}
.summary-list li{
  display:flex;
  gap:12px;
  padding:12px 0;
  border-top:1px solid var(--line);
  font-size:14px;
  line-height:1.75;
}
.summary-list li:first-child{border-top:0;padding-top:0;}
.summary-list strong{
  color:var(--accent);
  font-weight:600;
  min-width:78px;
  flex-shrink:0;
  font-size:13.5px;
}

/* ============ 主体 ============ */
.main{padding:56px 0 0;}
.section{padding:0 0 64px;}
.section-head{margin-bottom:26px;}
.section-head h2{margin-bottom:10px;}
.section-head p{font-size:15.5px;color:var(--text-2);max-width:760px;}

/* tab 条 */
.tabbar{
  display:flex;
  gap:6px;
  border-bottom:1px solid var(--line);
  overflow-x:auto;
  scrollbar-width:none;
}
.tabbar::-webkit-scrollbar{display:none;}
.tab-btn{
  position:relative;
  flex-shrink:0;
  border:0;
  background:transparent;
  color:var(--text-3);
  font-size:16px;
  font-weight:600;
  padding:14px 20px;
  transition:color .2s var(--ease);
  white-space:nowrap;
}
.tab-btn::after{
  content:"";
  position:absolute;
  left:20px;right:20px;bottom:-1px;
  height:2px;
  background:var(--accent);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .26s var(--ease);
}
.tab-btn:hover{color:var(--text-2);}
.tab-btn.is-active{color:var(--text);}
.tab-btn.is-active::after{transform:scaleX(1);}
.tab-panel{display:none;padding-top:40px;}
.tab-panel.is-active{display:block;animation:fadeUp .4s var(--ease);}
@keyframes fadeUp{from{opacity:0;transform:translateY(10px);}to{opacity:1;transform:none;}}

/* 图文大块 */
.content-block{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:44px;
  align-items:center;
  margin-bottom:46px;
}
.content-block.reverse .block-media{order:2;}
.block-media{
  border-radius:var(--radius);
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--shadow);
  position:relative;
}
.block-media img{width:100%;height:100%;object-fit:cover;border-radius:0;aspect-ratio:16/10;}
.block-media::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(180deg,transparent 45%,rgba(7,12,24,.6));
  pointer-events:none;
}
.block-text h3{margin-bottom:14px;}
.block-text p{font-size:15.5px;line-height:1.9;margin-bottom:14px;}
.tick-list li{
  position:relative;
  padding-left:22px;
  margin-bottom:12px;
  font-size:15px;
  line-height:1.8;
}
.tick-list li::before{
  content:"";
  position:absolute;
  left:0;top:11px;
  width:8px;height:8px;
  border-radius:2px;
  background:var(--accent);
  box-shadow:0 0 10px rgba(47,224,200,.55);
}
.link-arrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:15px;
  font-weight:600;
  color:var(--link);
  border-bottom:1px solid transparent;
  padding-bottom:2px;
}
.link-arrow:hover{color:var(--accent);border-bottom-color:var(--accent);}
.link-arrow::after{content:"→";transition:transform .2s var(--ease);}
.link-arrow:hover::after{transform:translateX(4px);}

/* 分隔刻度 */
.block-divider{
  position:relative;
  height:1px;
  background:var(--line);
  margin:52px 0;
}
.block-divider span{
  position:absolute;
  left:50%;top:50%;
  width:8px;height:8px;
  background:var(--accent-2);
  transform:translate(-50%,-50%) rotate(45deg);
  box-shadow:0 0 12px rgba(122,92,255,.6);
}

/* 三行两列信息块 */
.info-grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:0;
  border:1px solid var(--line);
  border-radius:var(--radius);
  overflow:hidden;
  background:var(--bg-panel);
}
.info-item{
  padding:26px 28px;
  border-bottom:1px solid var(--line);
  border-right:1px solid var(--line);
  transition:background .25s var(--ease);
}
.info-item:nth-child(2n){border-right:0;}
.info-item:nth-last-child(-n+2){border-bottom:0;}
.info-item:hover{background:var(--bg-elev);}
.info-item h4{
  font-size:18px;
  margin-bottom:10px;
  display:flex;
  align-items:center;
  gap:10px;
}
.info-item h4 b{
  width:22px;height:22px;
  border-radius:6px;
  display:grid;place-items:center;
  font-size:12px;
  color:var(--accent);
  border:1px solid rgba(47,224,200,.4);
  background:rgba(47,224,200,.08);
  font-weight:600;
  flex-shrink:0;
}
.info-item p{font-size:14.5px;line-height:1.85;color:var(--text-2);}

/* 对比条组 */
.compare{
  background:var(--bg-panel);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:28px;
}
.compare-legend{
  display:flex;
  gap:22px;
  flex-wrap:wrap;
  margin-bottom:22px;
  font-size:13px;
  color:var(--text-3);
}
.compare-legend i{
  display:inline-block;
  width:14px;height:8px;
  border-radius:3px;
  margin-right:7px;
  vertical-align:middle;
}
.legend-gray{background:rgba(255,255,255,.16);}
.legend-accent{background:var(--accent);box-shadow:0 0 10px rgba(47,224,200,.5);}
.compare-row{
  display:grid;
  grid-template-columns:150px 1fr;
  gap:18px;
  align-items:center;
  padding:15px 0;
  border-top:1px solid var(--line);
}
.compare-row:first-of-type{border-top:0;}
.compare-row .label{font-size:14.5px;color:var(--text-2);}
.bars{display:flex;flex-direction:column;gap:8px;}
.bar{
  height:9px;
  border-radius:999px;
  background:rgba(255,255,255,.16);
}
.bar.hot{
  background:linear-gradient(90deg,var(--brand),var(--accent));
  box-shadow:0 0 14px rgba(47,224,200,.45);
}

/* FAQ */
.faq{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  min-height:64px;
  padding:16px 4px 16px 16px;
  background:transparent;
  border:0;
  border-left:3px solid transparent;
  color:var(--text);
  font-size:16px;
  font-weight:600;
  line-height:1.6;
  text-align:left;
  transition:border-color .22s var(--ease),color .22s var(--ease);
}
.faq-item.open .faq-q{
  border-left-color:var(--accent);
  color:var(--accent);
}
.faq-q i{
  width:12px;height:12px;
  flex-shrink:0;
  border-right:2px solid var(--text-3);
  border-bottom:2px solid var(--text-3);
  transform:rotate(45deg) translateY(-2px);
  transition:transform .22s ease-out;
}
.faq-item.open .faq-q i{
  transform:rotate(225deg) translateY(-2px);
  border-color:var(--accent);
}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .3s ease-out,padding .3s ease-out;
}
.faq-item.open .faq-a{
  max-height:340px;
  padding:0 40px 22px 19px;
}
.faq-a p{font-size:15px;line-height:1.9;color:var(--text-2);}

/* CTA 表单 */
.cta-band{
  border-radius:var(--radius);
  border:1px solid var(--line);
  background:linear-gradient(135deg,rgba(44,107,255,.14),rgba(47,224,200,.07)),var(--bg-panel);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  padding:40px;
  display:grid;
  grid-template-columns:5fr 7fr;
  gap:44px;
  box-shadow:var(--shadow);
}
.cta-band h2{font-size:28px;margin-bottom:14px;}
.cta-band > div p{font-size:15px;line-height:1.9;margin-bottom:18px;}
.form{display:grid;grid-template-columns:1fr 1fr;gap:16px;}
.field{display:flex;flex-direction:column;gap:7px;}
.field.full{grid-column:1 / -1;}
.field label{font-size:13.5px;color:var(--text-2);}
.field input,.field select,.field textarea{
  width:100%;
  border-radius:var(--radius);
  border:1px solid rgba(255,255,255,.12);
  background:rgba(255,255,255,.05);
  padding:12px 14px;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.field textarea{min-height:104px;resize:vertical;line-height:1.7;}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;
  border-color:rgba(47,224,200,.65);
  box-shadow:0 0 0 3px rgba(47,224,200,.12);
}
.field select{appearance:none;background-image:linear-gradient(45deg,transparent 50%,var(--text-3) 50%),linear-gradient(135deg,var(--text-3) 50%,transparent 50%);background-position:calc(100% - 20px) 21px,calc(100% - 14px) 21px;background-size:6px 6px,6px 6px;background-repeat:no-repeat;}
.field.error input,.field.error textarea{border-color:var(--warn);}
.field .hint{font-size:13px;color:var(--warn);display:none;}
.field.error .hint{display:block;}
.form-foot{grid-column:1 / -1;display:flex;align-items:center;gap:16px;flex-wrap:wrap;}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  height:48px;
  padding:0 24px;
  border-radius:var(--radius-btn);
  font-size:16px;
  font-weight:600;
  border:1px solid transparent;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),filter .2s var(--ease),border-color .2s var(--ease),background .2s var(--ease);
}
.btn-primary{
  color:#fff;
  background:linear-gradient(135deg,var(--brand),var(--brand-deep));
  box-shadow:var(--glow);
}
.btn-primary:hover{filter:brightness(1.08);transform:translateY(-1px);box-shadow:0 0 0 1px rgba(47,224,200,.4),0 12px 34px rgba(44,107,255,.5);}
.btn-primary:active{transform:translateY(1px);box-shadow:0 0 0 1px rgba(47,224,200,.25),0 4px 14px rgba(44,107,255,.35);}
.btn-ghost{
  color:var(--text);
  background:var(--glass);
  border-color:var(--line-strong);
}
.btn-ghost:hover{border-color:rgba(47,224,200,.5);color:var(--accent);transform:translateY(-1px);}
.form-status{
  grid-column:1 / -1;
  display:none;
  align-items:center;
  gap:10px;
  padding:12px 16px;
  border-radius:10px;
  font-size:14.5px;
  color:var(--accent);
  border:1px solid rgba(47,224,200,.4);
  background:rgba(47,224,200,.08);
}
.form-status.show{display:flex;}

/* 相关分类 */
.related{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;}
.related-card{
  display:block;
  border-radius:var(--radius);
  border:1px solid var(--line);
  background:var(--bg-panel);
  overflow:hidden;
  transition:transform .24s var(--ease),border-color .24s var(--ease),box-shadow .24s var(--ease);
}
.related-card:hover{
  transform:translateY(-3px);
  border-color:var(--line-strong);
  box-shadow:var(--shadow-lg);
}
.related-card .thumb{aspect-ratio:16/9;overflow:hidden;}
.related-card .thumb img{border-radius:0;width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease);}
.related-card:hover .thumb img{transform:scale(1.05);}
.related-card .body{padding:22px;}
.related-card .body h3{font-size:19px;margin:10px 0 8px;color:var(--text);}
.related-card .body p{font-size:14.5px;line-height:1.8;color:var(--text-2);}
.related-card:hover .body h3{color:var(--accent);}

/* 页脚 */
.site-footer{
  background:#060A12;
  border-top:1px solid var(--line);
  margin-top:72px;
  padding-top:56px;
}
.footer-grid{
  display:grid;
  grid-template-columns:2fr 1fr 1fr 1fr;
  gap:40px;
  padding-bottom:44px;
}
.footer-brand p{font-size:14.5px;line-height:1.9;margin-top:16px;max-width:360px;color:var(--text-3);}
.footer-col h4{font-size:14px;margin-bottom:18px;color:var(--text);font-weight:600;}
.footer-col a{
  display:block;
  font-size:14px;
  color:var(--text-3);
  padding:6px 0;
}
.footer-col a:hover{color:var(--accent);}
.footer-bottom{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:16px;
  flex-wrap:wrap;
  padding:20px 0 28px;
  border-top:1px solid var(--line);
  font-size:13px;
  color:var(--text-3);
}
.footer-bottom a{color:var(--text-3);}
.footer-bottom a:hover{color:var(--accent);}

/* 回到顶部 */
.back-top{
  position:fixed;
  right:26px;bottom:26px;
  width:56px;height:56px;
  border-radius:50%;
  border:1px solid rgba(255,255,255,.12);
  background:rgba(255,255,255,.06);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  display:grid;
  place-items:center;
  opacity:0;
  visibility:hidden;
  transform:translateY(12px);
  transition:all .28s var(--ease);
  z-index:55;
}
.back-top.show{opacity:1;visibility:visible;transform:none;}
.back-top:hover{border-color:rgba(47,224,200,.55);box-shadow:0 8px 26px rgba(44,107,255,.4);}
.back-top svg{width:20px;height:20px;stroke:var(--accent);}

/* ============ 响应式 ============ */
@media (max-width:1280px){
  .banner-grid{gap:34px;}
  .cta-band{gap:34px;padding:34px;}
}
@media (max-width:1024px){
  h1{font-size:36px;}
  h2{font-size:28px;}
  .top-links{
    position:absolute;
    top:72px;left:0;right:0;
    flex-direction:column;
    align-items:stretch;
    gap:4px;
    padding:16px 24px 22px;
    background:rgba(7,12,24,.96);
    backdrop-filter:blur(14px);
    border-bottom:1px solid var(--line);
    display:none;
  }
  .site-header.drawer-open .top-links{display:flex;}
  .top-links a{padding:12px 14px;border-radius:10px;}
  .nav-toggle{display:block;}
  .search-box{width:100%;min-width:0;}
  .banner-grid{grid-template-columns:1fr;gap:26px;}
  .banner-card{max-width:560px;}
  .content-block{grid-template-columns:1fr;gap:26px;}
  .content-block.reverse .block-media{order:0;}
  .cta-band{grid-template-columns:1fr;}
}
@media (max-width:768px){
  h1{font-size:30px;}
  h2{font-size:24px;}
  h3{font-size:20px;}
  .banner-inner{padding:22px 24px 34px;}
  .main{padding:40px 0 0;}
  .section{padding-bottom:48px;}
  .block-divider{margin:40px 0;}
  .info-grid{grid-template-columns:1fr;}
  .info-item{border-right:0;}
  .info-item:nth-last-child(-n+2){border-bottom:1px solid var(--line);}
  .info-item:last-child{border-bottom:0;}
  .compare-row{grid-template-columns:1fr;gap:10px;}
  .related{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .footer-brand{grid-column:1 / -1;}
  .form{grid-template-columns:1fr;}
  .cta-band{padding:26px;}
}
@media (max-width:560px){
  body{background-image:none;}
  body::before{display:none;}
  .container{padding:0 18px;}
  .header-top{height:64px;}
  .site-header.is-stuck .header-top{height:58px;}
  .header-search-row{padding:2px 18px 12px;}
  .header-caps{padding:0 18px 12px;}
  .search-box{height:46px;padding-left:12px;}
  .search-box input{font-size:14px;}
  .btn-search{padding:0 16px;height:36px;}
  .banner-copy p{font-size:15.5px;}
  .compare{padding:20px;}
  .tab-btn{padding:13px 15px;font-size:15px;}
  .tab-btn::after{left:15px;right:15px;}
  .faq-item.open .faq-a{padding:0 12px 20px 19px;}
  .back-top{right:16px;bottom:16px;width:50px;height:50px;}
}
@media (max-width:380px){
  .container{padding:0 16px;}
  h1{font-size:26px;}
  .footer-grid{grid-template-columns:1fr;}
  .banner-card{padding:20px;}
  .summary-list li{flex-direction:column;gap:4px;}
}