/* roulang page: index */
:root{
  --bg-0:#060D18;
  --bg-1:#0A1526;
  --bg-2:#0E1B2E;
  --glass:rgba(255,255,255,.06);
  --brand:#1F6BE0;
  --glow:#4FE0E8;
  --accent:#F5A524;
  --line:rgba(120,190,255,.16);
  --line-strong:rgba(79,224,232,.40);
  --t-1:#E9F1FA;
  --t-2:#A9BCD0;
  --t-3:#6E8299;
  --r-sm:8px;
  --r-md:18px;
  --r-img:14px;
  --sh-1:0 10px 30px rgba(2,8,18,.45);
  --sh-2:0 20px 50px rgba(2,8,18,.60);
  --sh-glow:0 0 0 1px rgba(79,224,232,.35),0 8px 28px rgba(79,224,232,.22);
  --sp:8px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--t-1);
  font-family:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit;border:0;background:none;cursor:pointer;color:inherit}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding-left:1.4em}
h1{font-size:44px;line-height:1.2;letter-spacing:-.4px;font-weight:700}
h2{font-size:32px;line-height:1.3;font-weight:700;letter-spacing:-.2px}
h3{font-size:22px;line-height:1.45;font-weight:600}
.num{font-variant-numeric:tabular-nums}
:focus-visible{outline:2px solid var(--glow);outline-offset:2px}

/* ===== 布局骨架 ===== */
.shell{min-height:100vh}
.content{margin-left:240px;min-height:100vh;display:flex;flex-direction:column}
.container{width:100%;max-width:1320px;margin:0 auto;padding:0 32px}
.section{padding:88px 0}
.section--alt{background:var(--bg-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:32px;margin-bottom:40px}
.sec-head p{color:var(--t-2);font-size:15px;margin-top:10px;max-width:620px}
.eyebrow{display:inline-block;font-size:12px;letter-spacing:2px;color:var(--glow);text-transform:uppercase;margin-bottom:12px}

/* ===== 左侧竖向导航 ===== */
.sidebar{
  position:fixed;top:0;left:0;z-index:60;
  width:240px;height:100vh;
  display:flex;flex-direction:column;
  padding:28px 20px 24px;
  background:linear-gradient(180deg,rgba(10,21,38,.92),rgba(6,13,24,.96));
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  border-right:1px solid var(--line);
}
.brand{display:flex;align-items:center;gap:12px;margin-bottom:36px}
.brand-mark{
  width:44px;height:44px;flex:0 0 44px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,#2A7BE4,#4FE0E8);
  color:#06121F;font-weight:800;font-size:16px;letter-spacing:.5px;
  box-shadow:var(--sh-glow);
}
.brand-text{display:flex;flex-direction:column;line-height:1.3}
.brand-text strong{font-size:15px;color:var(--t-1);font-weight:700}
.brand-text em{font-style:normal;font-size:11px;color:var(--t-3);letter-spacing:.4px;margin-top:4px}
.nav{display:flex;flex-direction:column;gap:6px;flex:1}
.nav-item{
  position:relative;display:flex;align-items:center;gap:12px;
  padding:12px 14px;border-radius:12px;
  color:var(--t-2);font-size:15px;line-height:1.4;
  transition:background .25s ease,color .25s ease;
}
.nav-item svg{width:18px;height:18px;flex:0 0 18px;stroke:currentColor;fill:none;stroke-width:1.6;opacity:.85}
.nav-item::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:3px;height:0;border-radius:2px;background:var(--glow);
  box-shadow:0 0 12px rgba(79,224,232,.65);
  transition:height .25s ease;
}
.nav-item:hover{background:var(--glass);color:var(--t-1)}
.nav-item:hover::before{height:56%}
.nav-item.active{background:var(--glass);color:var(--t-1);font-weight:600}
.nav-item.active::before{height:62%}
.side-foot{border-top:1px solid var(--line);padding-top:18px;margin-top:18px}
.side-foot .btn{width:100%;height:44px;padding:0 16px;font-size:14px}
.side-tel{margin-top:14px;font-size:12px;color:var(--t-3);line-height:1.7}
.side-tel span{color:var(--t-2)}

/* ===== 移动端顶栏与抽屉 ===== */
.topbar{
  display:none;position:fixed;top:0;left:0;right:0;z-index:70;height:64px;
  align-items:center;justify-content:space-between;
  padding:0 20px;
  background:rgba(8,16,30,.94);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.topbar-logo{display:flex;align-items:center;gap:10px;font-size:15px;font-weight:700;color:var(--t-1)}
.topbar-logo .brand-mark{width:34px;height:34px;flex:0 0 34px;border-radius:10px;font-size:13px}
.burger{
  width:44px;height:44px;display:flex;align-items:center;justify-content:center;
  border-radius:12px;border:1px solid var(--line);background:var(--glass);
}
.burger svg{width:20px;height:20px;stroke:var(--t-1);fill:none;stroke-width:1.8}
.mask{
  position:fixed;inset:0;z-index:55;background:rgba(3,10,20,.62);
  opacity:0;visibility:hidden;transition:opacity .25s ease,visibility .25s ease;
}
.mask.show{opacity:1;visibility:visible}

/* ===== 通用组件 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 28px;border-radius:999px;
  font-size:15px;font-weight:600;line-height:1;
  border:1px solid transparent;cursor:pointer;white-space:nowrap;
  transition:transform .2s ease,box-shadow .25s ease,background .25s ease,border-color .25s ease,opacity .2s ease;
}
.btn-primary{
  background:linear-gradient(135deg,#2A7BE4,#4FE0E8);
  color:#06121F;box-shadow:var(--sh-glow);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 0 1px rgba(79,224,232,.5),0 14px 38px rgba(79,224,232,.34)}
.btn-ghost{background:transparent;border-color:rgba(140,205,255,.35);color:#CFE2F5}
.btn-ghost:hover{background:var(--glass);border-color:var(--line-strong);transform:translateY(-2px)}
.btn:active{transform:translateY(1px)}
.btn[disabled],.btn.is-disabled{opacity:.45;pointer-events:none;box-shadow:none;transform:none}
.btn-sm{height:40px;padding:0 20px;font-size:14px}
.link-arrow{
  display:inline-flex;align-items:center;gap:8px;color:var(--glow);font-size:15px;font-weight:600;
}
.link-arrow svg{width:16px;height:16px;stroke:currentColor;fill:none;stroke-width:2;transition:transform .25s ease}
.link-arrow:hover svg{transform:translateX(4px)}
.tag{
  display:inline-flex;align-items:center;height:24px;padding:0 12px;border-radius:999px;
  font-size:12px;line-height:1;background:var(--glass);color:var(--glow);border:1px solid var(--line);
}
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 12px;border-radius:999px;
  font-size:12px;line-height:1;background:var(--accent);color:#0B1420;font-weight:700;
}
.glass{
  background:var(--glass);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border:1px solid var(--line);
  border-radius:var(--r-md);
}
.card{
  background:var(--bg-2);border:1px solid var(--line);border-radius:var(--r-md);
  box-shadow:var(--sh-1);
  transition:transform .35s ease,border-color .35s ease,box-shadow .35s ease;
}
.card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--sh-2)}
.img-wrap{position:relative;overflow:hidden;border-radius:var(--r-img);background:#08111F}
.img-wrap img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.card:hover .img-wrap img{transform:scale(1.04)}
.img-wrap::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(6,13,24,0) 45%,rgba(6,13,24,.72) 100%);
  pointer-events:none;
}
.img-fallback{background:#08111F;border:1px dashed rgba(79,224,232,.35)}

/* ===== Hero ===== */
.hero{
  position:relative;overflow:hidden;
  padding:96px 0 80px;
  background:
    radial-gradient(900px 420px at 78% -10%,rgba(79,224,232,.14),transparent 65%),
    radial-gradient(760px 420px at 6% 112%,rgba(31,107,224,.18),transparent 62%);
}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(120,190,255,.06) 1px,transparent 1px),
    linear-gradient(90deg,rgba(120,190,255,.06) 1px,transparent 1px);
  background-size:64px 64px;
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.9),transparent 82%);
  mask-image:linear-gradient(180deg,rgba(0,0,0,.9),transparent 82%);
}
.hero-grid{position:relative;display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:center}
.hero h1{margin-bottom:20px}
.hero h1 em{font-style:normal;color:var(--glow)}
.hero-sub{font-size:18px;line-height:1.8;color:var(--t-2);max-width:620px}
.hero-marks{display:flex;flex-wrap:wrap;gap:12px;margin:28px 0 32px}
.hero-marks span{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 16px;border-radius:999px;font-size:13px;color:var(--t-2);
  background:var(--glass);border:1px solid var(--line);
}
.hero-marks svg{width:14px;height:14px;stroke:var(--glow);fill:none;stroke-width:2.2}
.hero-cta{display:flex;flex-wrap:wrap;gap:16px}
.hero-media{position:relative}
.hero-media .img-wrap{aspect-ratio:4/3;border-radius:var(--r-md);box-shadow:var(--sh-2)}
.hero-media .img-wrap::after{
  background:linear-gradient(90deg,rgba(6,13,24,.72) 0%,rgba(6,13,24,.18) 55%,rgba(6,13,24,.05) 100%);
}
.hero-spec{
  position:absolute;left:16px;right:16px;bottom:16px;
  display:grid;grid-template-columns:repeat(3,1fr);gap:8px;
  padding:14px 16px;border-radius:14px;
}
.hero-spec div{display:flex;flex-direction:column;gap:2px;padding-right:8px;border-right:1px solid var(--line)}
.hero-spec div:last-child{border-right:0}
.hero-spec span{font-size:11px;color:var(--t-3)}
.hero-spec strong{font-size:13px;color:var(--t-1);font-weight:600;font-variant-numeric:tabular-nums}

/* ===== 爆款网格 ===== */
.grid-hot{display:grid;grid-template-columns:repeat(12,1fr);gap:24px}
.hot-card{display:flex;flex-direction:column;overflow:hidden;padding:0}
.hot-lg{grid-column:1/span 6;grid-row:1/span 2}
.hot-a{grid-column:7/span 3;grid-row:1}
.hot-b{grid-column:10/span 3;grid-row:1}
.hot-c{grid-column:7/span 3;grid-row:2}
.hot-more{
  grid-column:10/span 3;grid-row:2;
  display:flex;flex-direction:column;justify-content:center;gap:12px;
  padding:24px;border-radius:var(--r-md);
  background:var(--glass);border:1px dashed var(--line-strong);
}
.hot-more h3{font-size:18px}
.hot-more p{font-size:13px;color:var(--t-2);line-height:1.7}
.hot-media{position:relative}
.hot-lg .hot-media{aspect-ratio:16/9}
.hot-card:not(.hot-lg) .hot-media{aspect-ratio:4/3}
.hot-media .badge{position:absolute;top:14px;left:14px;z-index:2}
.hot-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1}
.hot-body p{font-size:14px;color:var(--t-2);line-height:1.75}
.hot-lg .hot-body{padding:24px;gap:14px}
.hot-lg .hot-body p{font-size:15px}
.hot-line{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  margin-top:auto;padding-top:14px;border-top:1px solid var(--line);
}
.hot-price{font-size:16px;font-weight:700;color:var(--accent);font-variant-numeric:tabular-nums}
.hot-price small{display:block;font-size:11px;font-weight:400;color:var(--t-3);letter-spacing:.5px}
.hot-spec{font-size:12px;color:var(--t-3);font-variant-numeric:tabular-nums}

/* ===== 评价轮播 ===== */
.rev-track{
  display:flex;gap:24px;overflow-x:auto;scroll-snap-type:x mandatory;
  padding:4px 4px 20px;margin:0 -4px;
  scrollbar-width:none;
}
.rev-track::-webkit-scrollbar{display:none}
.rev-card{
  flex:0 0 calc((100% - 48px)/3);
  scroll-snap-align:start;
  padding:26px;display:flex;flex-direction:column;gap:16px;
}
.rev-top{display:flex;align-items:center;gap:14px}
.avatar{
  width:46px;height:46px;flex:0 0 46px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,rgba(31,107,224,.9),rgba(79,224,232,.85));
  color:#06121F;font-weight:700;font-size:17px;
}
.rev-name{font-size:15px;font-weight:600}
.rev-org{font-size:12px;color:var(--t-3)}
.stars{display:flex;gap:3px}
.stars svg{width:14px;height:14px;fill:var(--accent);stroke:none}
.rev-text{font-size:15px;line-height:1.85;color:var(--t-2)}
.rev-time{margin-top:auto;font-size:12px;color:var(--t-3);padding-top:12px;border-top:1px solid var(--line)}
.rev-nav{display:flex;gap:12px}
.rev-btn{
  width:44px;height:44px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:var(--glass);border:1px solid var(--line);color:var(--t-1);
  transition:background .25s ease,border-color .25s ease,opacity .25s ease,transform .2s ease;
}
.rev-btn svg{width:18px;height:18px;stroke:currentColor;fill:none;stroke-width:2}
.rev-btn:hover{background:rgba(79,224,232,.12);border-color:var(--line-strong);transform:translateY(-2px)}
.rev-btn[disabled]{opacity:.4;pointer-events:none}

/* ===== 保障条 ===== */
.promise{background:var(--bg-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:40px 0}
.promise-grid{display:grid;grid-template-columns:repeat(4,1fr)}
.promise-item{display:flex;gap:14px;padding:0 26px;border-left:1px solid var(--line)}
.promise-item:first-child{border-left:0;padding-left:0}
.promise-item:last-child{padding-right:0}
.promise-item svg{width:22px;height:22px;flex:0 0 22px;stroke:var(--accent);fill:none;stroke-width:1.7;margin-top:4px}
.promise-item strong{display:block;font-size:15px;margin-bottom:4px}
.promise-item p{font-size:13px;color:var(--t-3);line-height:1.7}

/* ===== 最新信息 ===== */
.chips{display:flex;flex-wrap:wrap;gap:10px}
.chips a{
  display:inline-flex;align-items:center;height:34px;padding:0 16px;border-radius:999px;
  font-size:13px;color:var(--t-2);background:var(--glass);border:1px solid var(--line);
  transition:color .25s ease,border-color .25s ease,background .25s ease;
}
.chips a:hover{color:var(--glow);border-color:var(--line-strong);background:rgba(79,224,232,.08)}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{display:flex;flex-direction:column;overflow:hidden;padding:0}
.news-thumb{aspect-ratio:16/9;overflow:hidden;border-bottom:1px solid var(--line)}
.news-body{padding:22px;display:flex;flex-direction:column;gap:12px;flex:1}
.news-body h3{font-size:19px;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-body p{
  font-size:14px;color:var(--t-2);line-height:1.75;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-meta{
  margin-top:auto;padding-top:14px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;
  font-size:12px;color:var(--t-3);font-variant-numeric:tabular-nums;
}
.news-empty{
  grid-column:1/-1;height:160px;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;
  border:1px dashed rgba(79,224,232,.35);border-radius:var(--r-md);
  color:var(--t-3);font-size:14px;
}
.news-empty svg{width:28px;height:28px;stroke:var(--glow);fill:none;stroke-width:1.5;opacity:.7}

/* ===== FAQ ===== */
.faq-wrap{max-width:920px;margin:0 auto}
.faq-item{border-bottom:1px solid var(--line);position:relative}
.faq-item:first-child{border-top:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 20px;text-align:left;font-size:17px;font-weight:600;color:var(--t-1);
  transition:color .25s ease,background .25s ease;
}
.faq-q:hover{color:var(--glow)}
.faq-q::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--glow);
  border-radius:2px;opacity:0;transition:opacity .22s ease;box-shadow:0 0 14px rgba(79,224,232,.5);
}
.faq-item.open .faq-q::before{opacity:1}
.faq-ico{
  position:relative;width:22px;height:22px;flex:0 0 22px;
  transition:transform .22s ease;
}
.faq-ico::before,.faq-ico::after{
  content:"";position:absolute;background:var(--glow);border-radius:2px;
}
.faq-ico::before{left:0;right:0;top:10px;height:2px}
.faq-ico::after{top:0;bottom:0;left:10px;width:2px;transition:opacity .22s ease}
.faq-item.open .faq-ico{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .22s ease}
.faq-a p{padding:0 20px 22px;font-size:15px;line-height:1.8;color:var(--t-2);max-width:760px}

/* ===== 底部 CTA ===== */
.cta-band{
  position:relative;overflow:hidden;
  border-radius:24px;padding:44px 48px;
  display:flex;align-items:center;justify-content:space-between;gap:40px;
  background:var(--glass);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  border:1px solid var(--line-strong);
  box-shadow:var(--sh-2);
}
.cta-band::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(520px 260px at 88% 10%,rgba(79,224,232,.16),transparent 70%);
}
.cta-left{position:relative;display:flex;gap:24px;align-items:center}
.cta-thumb{width:120px;height:88px;flex:0 0 120px;border-radius:var(--r-img);overflow:hidden;border:1px solid var(--line)}
.cta-left h2{font-size:28px;line-height:1.35;margin-bottom:8px}
.cta-left p{font-size:14px;color:var(--t-2)}
.cta-actions{position:relative;display:flex;gap:16px;flex-wrap:wrap}

/* ===== 页脚 ===== */
.site-footer{
  margin-top:auto;position:relative;
  background:var(--bg-1);
  border-top:1px solid var(--line);
  padding:64px 0 28px;
}
.site-footer::before{
  content:"";position:absolute;top:-1px;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(79,224,232,.55),transparent);
}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px}
.foot-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.foot-brand strong{font-size:16px}
.foot-desc{font-size:13px;color:var(--t-3);line-height:1.8;max-width:340px}
.foot-col h4{font-size:14px;color:var(--t-1);margin-bottom:16px;font-weight:600}
.foot-col ul{list-style:none;padding:0;display:flex;flex-direction:column;gap:10px}
.foot-col a{font-size:13px;color:var(--t-2);position:relative;transition:color .25s ease}
.foot-col a::after{
  content:"";position:absolute;left:0;bottom:-2px;width:100%;height:1px;
  background:var(--glow);transform:scaleX(0);transform-origin:left;transition:transform .25s ease;
}
.foot-col a:hover{color:var(--glow)}
.foot-col a:hover::after{transform:scaleX(1)}
.foot-col p{font-size:13px;color:var(--t-2);line-height:1.9}
.foot-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;
  font-size:12px;color:var(--t-3);
}
.foot-bottom .domain{font-variant-numeric:tabular-nums;letter-spacing:.4px}

/* ===== 响应式 ===== */
@media (max-width:1439px){
  h1{font-size:40px}
}
@media (max-width:1279px){
  .sidebar{width:216px;padding:24px 16px 20px}
  .content{margin-left:216px}
  .hero-grid{gap:36px}
  .grid-hot{grid-template-columns:repeat(2,1fr)}
  .hot-lg,.hot-a,.hot-b,.hot-c,.hot-more{grid-column:auto;grid-row:auto}
  .hot-lg{grid-column:1/-1;grid-row:auto}
  .hot-lg .hot-media{aspect-ratio:16/9}
  .foot-grid{grid-template-columns:1.4fr 1fr 1fr;gap:32px}
}
@media (max-width:1023px){
  .sidebar{
    width:280px;left:auto;right:0;height:100vh;
    transform:translateX(100%);
    transition:transform .28s ease;
    border-right:0;border-left:1px solid var(--line);
    padding:24px 20px;
    z-index:80;
  }
  .sidebar.open{transform:translateX(0)}
  .topbar{display:flex}
  .content{margin-left:0;padding-top:64px}
  .hero{padding:64px 0 56px}
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero-media{order:2}
  .section{padding:64px 0}
  .sec-head{flex-direction:column;align-items:flex-start;gap:20px}
  .grid-hot{grid-template-columns:repeat(2,1fr)}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .rev-card{flex:0 0 calc((100% - 24px)/2)}
  .promise-grid{grid-template-columns:repeat(2,1fr);gap:28px 0}
  .promise-item:nth-child(3){border-left:0;padding-left:0}
  .cta-band{flex-direction:column;align-items:flex-start;padding:36px 32px}
  .cta-thumb{display:none}
  .foot-grid{grid-template-columns:1fr 1fr;gap:36px}
}
@media (max-width:767px){
  h1{font-size:30px}
  h2{font-size:24px}
  h3{font-size:19px}
  .container{padding:0 20px}
  .section{padding:48px 0}
  .hero{padding:48px 0 40px}
  .hero-sub{font-size:16px}
  .hero-cta{flex-direction:column;align-items:stretch}
  .hero-cta .btn{width:100%}
  .hero-spec{grid-template-columns:1fr;gap:10px;position:static;margin-top:16px;left:auto;right:auto;bottom:auto}
  .hero-spec div{border-right:0;border-bottom:1px solid var(--line);padding:0 0 8px}
  .hero-spec div:last-child{border-bottom:0;padding-bottom:0}
  .grid-hot{grid-template-columns:1fr}
  .hot-lg{grid-column:auto}
  .news-grid{grid-template-columns:1fr}
  .rev-card{flex:0 0 86%}
  .promise-grid{grid-template-columns:1fr;gap:22px}
  .promise-item{border-left:0;padding:0 0 20px;border-bottom:1px solid var(--line)}
  .promise-item:last-child{border-bottom:0;padding-bottom:0}
  .faq-q{font-size:16px;padding:20px 14px}
  .faq-a p{padding:0 14px 20px}
  .cta-left{flex-direction:column;align-items:flex-start;gap:0}
  .cta-band{padding:28px 22px}
  .cta-actions{width:100%;flex-direction:column}
  .cta-actions .btn{width:100%}
  .foot-grid{grid-template-columns:1fr;gap:32px}
  .foot-bottom{flex-direction:column;align-items:flex-start;gap:10px}
  .btn{height:44px}
}
@media (max-width:480px){
  h1{font-size:26px}
  .brand-text strong{font-size:14px}
  .rev-card{flex:0 0 92%}
}

/* roulang page: article */
:root{
  --bg-0:#060D18;
  --bg-1:#0A1526;
  --bg-2:#0E1B2E;
  --glass:rgba(255,255,255,.06);
  --brand:#1F6BE0;
  --link:#63B0FF;
  --glow:#4FE0E8;
  --accent:#F5A524;
  --line:rgba(120,190,255,.16);
  --line-strong:rgba(79,224,232,.40);
  --t-1:#E9F1FA;
  --t-2:#A9BCD0;
  --t-3:#6E8299;
  --r-sm:8px;
  --r-card:18px;
  --r-img:14px;
  --r-pill:999px;
  --sh-1:0 10px 30px rgba(2,8,18,.45);
  --sh-2:0 20px 50px rgba(2,8,18,.60);
  --sh-glow:0 0 0 1px rgba(79,224,232,.35), 0 8px 28px rgba(79,224,232,.22);
  --side-w:240px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bg-0);color:var(--t-1);font-family:var(--font);font-size:16px;line-height:1.85;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
img{max-width:100%;display:block;border-style:none}
a{color:var(--link);text-decoration:none}
button{font-family:inherit}
h1,h2,h3,h4{margin:0;font-weight:700;color:var(--t-1);letter-spacing:.2px}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
svg{display:block}
::selection{background:rgba(79,224,232,.28)}
:focus-visible{outline:2px solid var(--glow);outline-offset:2px}
.container{width:100%;max-width:1320px;margin:0 auto;padding:0 32px}
.shell{margin-left:var(--side-w)}
.eyebrow{display:inline-block;font-size:12px;letter-spacing:2px;color:var(--glow);text-transform:uppercase;margin-bottom:10px}

/* ---------- 侧边导航 ---------- */
.sidebar{position:fixed;left:0;top:0;bottom:0;width:var(--side-w);height:100vh;z-index:60;display:flex;flex-direction:column;gap:14px;padding:26px 16px 20px;background:linear-gradient(180deg,rgba(14,27,46,.94),rgba(8,18,33,.90));backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-right:1px solid var(--line);overflow-y:auto}
.side-brand{display:flex;align-items:center;gap:10px;padding:6px 8px 16px;border-bottom:1px solid var(--line)}
.brand-mark{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;flex:0 0 38px;border-radius:11px;background:linear-gradient(135deg,#2A7BE4,#4FE0E8);color:#06121F;font-size:14px;font-weight:800;letter-spacing:.5px;box-shadow:0 6px 18px rgba(79,224,232,.28)}
.side-brand-text{display:flex;flex-direction:column;line-height:1.35}
.side-brand-text strong{font-size:15px;color:var(--t-1)}
.side-brand-text em{font-style:normal;font-size:11px;color:var(--t-3);letter-spacing:.4px}
.side-nav{display:flex;flex-direction:column;gap:4px;flex:1}
.nav-item{position:relative;display:flex;align-items:center;gap:11px;min-height:46px;padding:0 12px;border-radius:12px;color:var(--t-2);font-size:14.5px;transition:background .22s ease,color .22s ease,transform .22s ease}
.nav-item svg{width:18px;height:18px;flex:0 0 18px;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.nav-item::before{content:"";position:absolute;left:-16px;top:50%;transform:translateY(-50%);width:3px;height:0;border-radius:0 3px 3px 0;background:var(--glow);box-shadow:0 0 12px rgba(79,224,232,.85);transition:height .22s ease}
.nav-item:hover{background:var(--glass);color:var(--t-1);transform:translateX(2px)}
.nav-item.active{background:var(--glass);color:var(--t-1);font-weight:600}
.nav-item.active::before{height:22px}
.side-foot{display:flex;flex-direction:column;gap:8px;padding-top:16px;border-top:1px solid var(--line)}
.side-foot-note{font-size:12px;color:var(--t-3);line-height:1.7;word-break:break-all}

/* ---------- 顶部栏与抽屉 ---------- */
.topbar{display:none;position:fixed;top:0;left:0;right:0;height:64px;z-index:70;align-items:center;justify-content:space-between;padding:0 20px;background:rgba(8,18,33,.92);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.topbar-logo{display:flex;align-items:center;gap:10px;color:var(--t-1);font-size:15px;font-weight:700}
.topbar-logo .brand-mark{width:34px;height:34px;flex:0 0 34px;border-radius:10px;font-size:13px}
.burger{width:44px;height:44px;display:inline-flex;align-items:center;justify-content:center;border-radius:12px;border:1px solid var(--line);background:var(--glass);cursor:pointer;transition:border-color .2s ease,background .2s ease}
.burger:hover{border-color:var(--line-strong);background:rgba(255,255,255,.09)}
.burger svg{width:22px;height:22px;stroke:var(--t-1);fill:none;stroke-width:1.8;stroke-linecap:round}
.drawer-mask{position:fixed;inset:0;background:rgba(3,10,20,.62);opacity:0;visibility:hidden;transition:opacity .28s ease,visibility .28s ease;z-index:80}
.drawer-mask.open{opacity:1;visibility:visible}
.drawer{position:fixed;top:0;right:0;bottom:0;width:280px;max-width:86vw;z-index:90;padding:22px 18px;background:linear-gradient(180deg,rgba(14,27,46,.98),rgba(8,18,33,.98));border-left:1px solid var(--line);transform:translateX(102%);transition:transform .3s cubic-bezier(.3,.8,.3,1);overflow-y:auto;display:flex;flex-direction:column;gap:16px}
.drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:14px;border-bottom:1px solid var(--line)}
.drawer-head strong{font-size:15px}
.drawer-close{width:40px;height:40px;display:inline-flex;align-items:center;justify-content:center;border-radius:11px;border:1px solid var(--line);background:var(--glass);cursor:pointer}
.drawer-close svg{width:18px;height:18px;stroke:var(--t-1);fill:none;stroke-width:1.8;stroke-linecap:round}
.drawer .nav-item{min-height:48px}
.drawer .nav-item::before{left:-18px}

/* ---------- 按钮与标签 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 28px;border-radius:var(--r-pill);font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;white-space:nowrap;transition:transform .2s ease,box-shadow .25s ease,background .25s ease,border-color .25s ease,color .2s ease}
.btn-primary{background:linear-gradient(135deg,#2A7BE4,#4FE0E8);color:#06121F;box-shadow:var(--sh-glow)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 0 1px rgba(79,224,232,.6),0 14px 38px rgba(79,224,232,.34)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:transparent;border-color:rgba(140,205,255,.35);color:#CFE2F5}
.btn-ghost:hover{background:var(--glass);border-color:var(--line-strong);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(1px)}
.btn-block{width:100%}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn[disabled],.btn.is-disabled{opacity:.45;pointer-events:none;box-shadow:none;transform:none}
.text-arrow{display:inline-flex;align-items:center;gap:8px;font-size:14px;color:var(--link)}
.text-arrow span{display:inline-block;transition:transform .25s ease}
.text-arrow:hover{color:var(--glow)}
.text-arrow:hover span{transform:translateX(4px)}
.tag{display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:var(--r-pill);font-size:12px;background:var(--glass);border:1px solid var(--line);color:var(--glow)}
.tag-accent{background:var(--accent);border-color:transparent;color:#1A1206;font-weight:700}

/* ---------- 文章头部 ---------- */
.article-hero{position:relative;overflow:hidden;padding:96px 0 52px;border-bottom:1px solid var(--line);background:
  radial-gradient(900px 420px at 10% -20%, rgba(79,224,232,.14), transparent 62%),
  radial-gradient(760px 380px at 92% -10%, rgba(31,107,224,.18), transparent 66%),
  var(--bg-1);}
.article-hero::after{content:"";position:absolute;inset:0;pointer-events:none;opacity:.55;background-image:linear-gradient(rgba(120,190,255,.055) 1px,transparent 1px),linear-gradient(90deg,rgba(120,190,255,.055) 1px,transparent 1px);background-size:52px 52px}
.article-hero .container{position:relative;z-index:2}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--t-3);margin-bottom:20px}
.breadcrumb a{color:var(--t-3);transition:color .2s ease}
.breadcrumb a:hover{color:var(--glow)}
.breadcrumb .current{color:var(--t-2)}
.breadcrumb i{font-style:normal;color:rgba(110,130,153,.7)}
.article-hero h1{font-size:44px;line-height:1.2;max-width:960px;margin-bottom:20px}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:14px;font-size:13px;color:var(--t-3);font-variant-numeric:tabular-nums}
.meta-row .divider{width:1px;height:12px;background:var(--line)}
.meta-row .cat{color:var(--glow)}
.hero-strip{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px;padding:12px 16px;border-radius:var(--r-pill);background:var(--glass);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border:1px solid var(--line);width:fit-content;max-width:100%}
.hero-strip span{font-size:13px;color:var(--t-2);display:inline-flex;align-items:center;gap:7px}
.hero-strip span + span::before{content:"";width:1px;height:12px;background:var(--line);margin-right:9px;display:inline-block}
.hero-strip b{color:var(--t-1);font-variant-numeric:tabular-nums}

/* ---------- 正文区 ---------- */
.article-grid{display:grid;grid-template-columns:minmax(0,1fr);gap:48px;padding:56px 0 72px}
.article-body{max-width:800px;font-size:17px;line-height:1.9;color:var(--t-1)}
.article-body > * + *{margin-top:20px}
.article-body h2{position:relative;font-size:26px;line-height:1.35;margin-top:42px;padding-left:16px}
.article-body h2::before{content:"";position:absolute;left:0;top:.16em;bottom:.16em;width:4px;border-radius:3px;background:linear-gradient(180deg,var(--glow),var(--brand));box-shadow:0 0 14px rgba(79,224,232,.45)}
.article-body h3{font-size:20px;line-height:1.45;margin-top:32px}
.article-body p + p{margin-top:20px}
.article-body a{color:var(--link);border-bottom:1px solid rgba(99,176,255,.35);transition:color .2s ease,border-color .2s ease}
.article-body a:hover{color:var(--glow);border-color:var(--glow)}
.article-body ul,.article-body ol{padding-left:1.4em}
.article-body ul{list-style:disc}
.article-body ol{list-style:decimal}
.article-body li{margin:.42em 0;line-height:1.85}
.article-body li::marker{color:var(--glow)}
.article-body blockquote{margin:28px 0;padding:18px 22px;background:var(--glass);border-left:3px solid var(--glow);border-radius:0 12px 12px 0;color:var(--t-2);font-size:16px;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px)}
.article-body img{border-radius:var(--r-img);margin:28px auto;box-shadow:var(--sh-1)}
.article-body figure{margin:28px 0}
.article-body figcaption{margin-top:10px;text-align:center;font-size:13px;color:var(--t-3)}
.article-body table{width:100%;border-collapse:collapse;margin:28px 0;font-size:15px;font-variant-numeric:tabular-nums}
.article-body th{background:var(--bg-2);text-align:left;padding:12px 14px;border:1px solid var(--line);font-weight:600;color:var(--t-1)}
.article-body td{padding:12px 14px;border:1px solid var(--line);color:var(--t-2)}
.article-body tbody tr:hover td{background:var(--glass)}
.article-body strong{color:#FFFFFF;font-weight:700}
.article-body hr{border:0;border-top:1px solid var(--line);margin:36px 0}
.article-body code{padding:2px 6px;border-radius:6px;background:rgba(255,255,255,.07);color:var(--glow);font-size:15px}

.article-foot{margin-top:48px;padding-top:26px;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px}
.empty-state{max-width:800px;padding:56px 24px;text-align:center;border:1px dashed var(--line);border-radius:var(--r-card);background:rgba(255,255,255,.03)}
.empty-state svg{width:44px;height:44px;margin:0 auto 16px;stroke:var(--glow);fill:none;stroke-width:1.5}
.empty-state h2{font-size:20px;margin-bottom:10px}
.empty-state p{color:var(--t-2);font-size:15px;margin-bottom:20px}

/* 侧栏信息卡 */
.article-side{display:none}
.side-card{padding:20px;border-radius:var(--r-card);background:var(--bg-2);border:1px solid var(--line);box-shadow:var(--sh-1)}
.side-card + .side-card{margin-top:18px}
.side-card h3{font-size:15px;margin-bottom:14px;padding-bottom:12px;border-bottom:1px solid var(--line)}
.side-list li{display:flex;justify-content:space-between;gap:10px;font-size:13.5px;color:var(--t-2);padding:7px 0;font-variant-numeric:tabular-nums}
.side-list li + li{border-top:1px solid rgba(120,190,255,.09)}
.side-links li + li{margin-top:6px}
.side-links a{display:flex;align-items:center;gap:8px;font-size:13.5px;color:var(--t-2);padding:8px 10px;border-radius:10px;transition:background .2s ease,color .2s ease}
.side-links a:hover{background:var(--glass);color:var(--glow)}
.side-links a::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--glow);flex:0 0 5px}
.side-note{font-size:13px;color:var(--t-3);line-height:1.75;word-break:break-all}

/* ---------- 相关推荐 ---------- */
.related{padding:64px 0 72px;border-top:1px solid var(--line);background:var(--bg-1)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:28px}
.section-head h2{font-size:32px;line-height:1.3}
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.news-card{display:flex;flex-direction:column;background:var(--bg-2);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1);transition:transform .35s ease,border-color .35s ease,box-shadow .35s ease}
.news-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--sh-2),0 0 0 1px rgba(79,224,232,.25)}
.news-thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:linear-gradient(160deg,#0E1B2E,#0A1526);}
.news-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.news-card:hover .news-thumb img{transform:scale(1.04)}
.news-body{padding:18px 20px 22px;display:flex;flex-direction:column;gap:10px;flex:1}
.news-body h3{font-size:17px;line-height:1.5}
.news-body p{font-size:14px;color:var(--t-2);line-height:1.75;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-meta{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:12px;color:var(--t-3);font-variant-numeric:tabular-nums;padding-top:12px;border-top:1px solid rgba(120,190,255,.09)}

/* ---------- CTA 带 ---------- */
.cta-wrap{padding:0 0 88px}
.cta-band{position:relative;display:flex;flex-wrap:wrap;align-items:center;gap:28px;justify-content:space-between;padding:34px 36px;border-radius:22px;border:1px solid var(--line-strong);background:linear-gradient(120deg,rgba(14,27,46,.92),rgba(31,107,224,.22));backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);box-shadow:var(--sh-2);overflow:hidden}
.cta-band::after{content:"";position:absolute;right:-60px;top:-60px;width:240px;height:240px;border-radius:50%;background:radial-gradient(circle,rgba(79,224,232,.28),transparent 70%);pointer-events:none}
.cta-left{max-width:640px;position:relative;z-index:2}
.cta-left h2{font-size:28px;line-height:1.35;margin-bottom:10px}
.cta-left p{color:var(--t-2);font-size:15px;line-height:1.8}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;position:relative;z-index:2}

/* ---------- 页脚 ---------- */
.site-footer{border-top:1px solid var(--line);background:var(--bg-1);position:relative}
.site-footer::before{content:"";position:absolute;top:-1px;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,rgba(79,224,232,.7),transparent)}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px;padding:64px 0 40px}
.foot-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.foot-brand strong{font-size:16px}
.foot-desc{font-size:14px;color:var(--t-2);line-height:1.85;max-width:380px}
.foot-col h4{font-size:14px;letter-spacing:.6px;margin-bottom:16px;color:var(--t-1)}
.foot-col ul li + li{margin-top:9px}
.foot-col a{font-size:14px;color:var(--t-2);transition:color .2s ease}
.foot-col a:hover{color:var(--glow)}
.foot-col p{font-size:13.5px;color:var(--t-3);line-height:1.85;word-break:break-all}
.foot-col p + p{margin-top:8px}
.foot-bottom{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;padding:20px 0 28px;border-top:1px solid var(--line);font-size:13px;color:var(--t-3);font-variant-numeric:tabular-nums}
.foot-bottom .domain{letter-spacing:.6px}

/* ---------- 响应式 ---------- */
@media (min-width:1024px) and (max-width:1279px){
  :root{--side-w:216px}
}
@media (min-width:1280px){
  .article-grid{grid-template-columns:minmax(0,800px) 250px;justify-content:space-between}
  .article-side{display:block;position:sticky;top:32px;align-self:start}
}
@media (max-width:1279px){
  .article-body{margin:0 auto}
}
@media (max-width:1023px){
  .sidebar{display:none}
  .topbar{display:flex}
  .shell{margin-left:0;padding-top:64px}
  .article-hero{padding:56px 0 40px}
  .article-hero h1{font-size:34px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:28px;padding:48px 0 32px}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:768px){
  .container{padding:0 20px}
  .article-hero{padding:44px 0 34px}
  .article-hero h1{font-size:30px;margin-bottom:16px}
  .hero-strip{border-radius:18px;gap:8px;padding:12px 14px}
  .hero-strip span + span::before{display:none}
  .article-grid{gap:32px;padding:36px 0 48px}
  .article-body{font-size:16px;line-height:1.85}
  .article-body h2{font-size:22px;margin-top:32px}
  .article-body h3{font-size:19px}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px}
  .section-head h2{font-size:24px}
  .card-grid{grid-template-columns:minmax(0,1fr)}
  .related{padding:48px 0 56px}
  .cta-band{padding:26px 22px;border-radius:18px}
  .cta-left h2{font-size:22px}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1 1 auto;min-width:150px}
  .btn{height:44px;padding:0 22px}
  .btn-sm{height:44px;padding:0 18px}
  .foot-grid{grid-template-columns:minmax(0,1fr)}
  .foot-bottom{flex-direction:column;align-items:flex-start}
  .cta-wrap{padding-bottom:64px}
}
@media (max-width:480px){
  .article-hero h1{font-size:26px}
  .article-body table{display:block;overflow-x:auto;white-space:nowrap}
  .meta-row{gap:10px;font-size:12px}
}

/* roulang page: category1 */
:root{
  --bg-0:#060D18;
  --bg-1:#0A1526;
  --bg-2:#0E1B2E;
  --glass:rgba(255,255,255,.06);
  --brand:#1F6BE0;
  --glow:#4FE0E8;
  --accent:#F5A524;
  --line:rgba(120,190,255,.16);
  --line-strong:rgba(79,224,232,.40);
  --t-1:#E9F1FA;
  --t-2:#A9BCD0;
  --t-3:#6E8299;
  --r-sm:8px;
  --r-img:14px;
  --r-card:18px;
  --sh-1:0 10px 30px rgba(2,8,18,.45);
  --sh-2:0 20px 50px rgba(2,8,18,.60);
  --sh-glow:0 0 0 1px rgba(79,224,232,.35), 0 8px 28px rgba(79,224,232,.22);
  --nav-w:240px;
  --ease:.25s cubic-bezier(.4,0,.2,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--t-1);
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC","Noto Sans CJK SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--r-img)}
a{color:var(--glow);text-decoration:none;transition:color var(--ease)}
a:hover{color:#8DF0F5}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
h1,h2,h3,h4{margin:0;line-height:1.3;font-weight:700;letter-spacing:.2px}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
svg{display:block}
:focus-visible{outline:2px solid var(--glow);outline-offset:2px;border-radius:6px}
.num{font-variant-numeric:tabular-nums}

/* ============ 布局骨架 ============ */
.app{min-height:100vh}
.shell{margin-left:var(--nav-w);min-width:0}

/* ============ 左侧导航栏 ============ */
.sidebar{
  position:fixed;
  inset:0 auto 0 0;
  width:var(--nav-w);
  height:100vh;
  display:flex;
  flex-direction:column;
  padding:28px 18px 22px;
  background:linear-gradient(180deg,rgba(255,255,255,.06),rgba(255,255,255,.02));
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-right:1px solid var(--line);
  z-index:40;
}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  padding:0 8px 22px;
  border-bottom:1px solid var(--line);
  margin-bottom:20px;
}
.brand-mark{
  width:38px;height:38px;
  flex:0 0 38px;
  display:grid;place-items:center;
  border-radius:11px;
  background:linear-gradient(135deg,#2A7BE4,#4FE0E8);
  color:#06121F;
  font-weight:800;
  font-size:14px;
  letter-spacing:.5px;
  box-shadow:0 6px 18px rgba(79,224,232,.28);
}
.brand-text{display:flex;flex-direction:column;line-height:1.35;min-width:0}
.brand-text strong{font-size:15px;color:var(--t-1);white-space:nowrap}
.brand-text span{font-size:12px;color:var(--t-3);letter-spacing:.4px}
.side-nav{display:flex;flex-direction:column;gap:4px}
.side-nav a{
  position:relative;
  display:flex;
  align-items:center;
  gap:11px;
  min-height:44px;
  padding:0 12px;
  border-radius:10px;
  color:var(--t-2);
  font-size:14.5px;
  transition:background var(--ease),color var(--ease);
}
.side-nav a svg{width:17px;height:17px;stroke:currentColor;stroke-width:1.7;fill:none;stroke-linecap:round;stroke-linejoin:round;opacity:.85}
.side-nav a::before{
  content:"";
  position:absolute;
  left:0;top:50%;
  transform:translateY(-50%) scaleY(0);
  width:3px;height:22px;
  border-radius:3px;
  background:var(--glow);
  box-shadow:0 0 12px rgba(79,224,232,.85);
  transition:transform var(--ease);
}
.side-nav a:hover{background:var(--glass);color:var(--t-1)}
.side-nav a.active{background:var(--glass);color:var(--t-1);font-weight:600}
.side-nav a.active::before{transform:translateY(-50%) scaleY(1)}
.side-foot{
  margin-top:auto;
  padding:16px;
  border-radius:var(--r-card);
  background:var(--glass);
  border:1px solid var(--line);
}
.side-foot h4{font-size:13px;color:var(--t-2);font-weight:600;margin-bottom:8px}
.side-foot p{font-size:12.5px;color:var(--t-3);line-height:1.7}
.side-foot .line-btn{
  display:inline-flex;align-items:center;gap:6px;
  margin-top:10px;font-size:13px;color:var(--glow);font-weight:600;
}
.side-foot .line-btn svg{width:14px;height:14px;stroke:currentColor;stroke-width:2;fill:none;transition:transform var(--ease)}
.side-foot .line-btn:hover svg{transform:translateX(4px)}

/* ============ 顶部栏（移动端） ============ */
.topbar{
  display:none;
  position:fixed;
  top:0;left:0;right:0;
  height:64px;
  padding:0 20px;
  align-items:center;
  justify-content:space-between;
  background:rgba(8,18,32,.86);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  z-index:50;
}
.topbar-logo{display:flex;align-items:center;gap:10px;color:var(--t-1);font-size:15px;font-weight:600}
.burger{
  width:44px;height:44px;
  display:grid;place-items:center;
  border-radius:10px;
  border:1px solid var(--line);
  background:var(--glass);
}
.burger svg{width:22px;height:22px;stroke:var(--t-1);stroke-width:1.8;fill:none;stroke-linecap:round}

/* 抽屉 */
.scrim{
  position:fixed;inset:0;
  background:rgba(3,10,20,.62);
  opacity:0;visibility:hidden;
  transition:opacity var(--ease),visibility var(--ease);
  z-index:60;
}
.scrim.open{opacity:1;visibility:visible}
.drawer{
  position:fixed;
  top:0;right:0;bottom:0;
  width:280px;
  padding:22px 18px;
  background:#08121F;
  border-left:1px solid var(--line);
  transform:translateX(102%);
  transition:transform .28s cubic-bezier(.4,0,.2,1);
  z-index:70;
  overflow-y:auto;
}
.drawer.open{transform:translateX(0)}
.drawer-head{
  display:flex;align-items:center;justify-content:space-between;
  padding-bottom:16px;margin-bottom:16px;border-bottom:1px solid var(--line);
  font-size:14px;color:var(--t-2);
}
.drawer-head button{
  width:38px;height:38px;display:grid;place-items:center;
  border-radius:10px;border:1px solid var(--line);background:var(--glass);
}
.drawer-head button svg{width:18px;height:18px;stroke:var(--t-1);stroke-width:1.8;fill:none;stroke-linecap:round}
.drawer nav{display:flex;flex-direction:column;gap:4px}
.drawer nav a{
  position:relative;
  display:flex;align-items:center;gap:11px;
  min-height:46px;padding:0 12px;
  border-radius:10px;color:var(--t-2);font-size:15px;
}
.drawer nav a svg{width:17px;height:17px;stroke:currentColor;stroke-width:1.7;fill:none;stroke-linecap:round;stroke-linejoin:round}
.drawer nav a::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%) scaleY(0);
  width:3px;height:22px;border-radius:3px;background:var(--glow);transition:transform var(--ease);
}
.drawer nav a.active{background:var(--glass);color:var(--t-1);font-weight:600}
.drawer nav a.active::before{transform:translateY(-50%) scaleY(1)}

/* ============ 容器 ============ */
.container{
  width:100%;
  max-width:1320px;
  margin:0 auto;
  padding:0 32px;
}

/* ============ 内页横幅 ============ */
.page-hero{
  position:relative;
  height:300px;
  display:flex;
  align-items:center;
  overflow:hidden;
  background:
    radial-gradient(900px 420px at 12% 10%,rgba(31,107,224,.30),transparent 62%),
    radial-gradient(700px 360px at 88% 90%,rgba(79,224,232,.16),transparent 60%),
    url("/assets/images/backpic/back-1.webp") center/cover no-repeat,
    #08121F;
  border-bottom:1px solid var(--line);
}
.page-hero::before{
  content:"";
  position:absolute;inset:0;
  background-image:linear-gradient(rgba(120,190,255,.055) 1px,transparent 1px),linear-gradient(90deg,rgba(120,190,255,.055) 1px,transparent 1px);
  background-size:64px 64px;
  pointer-events:none;
}
.page-hero::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(6,13,24,.94) 0%,rgba(6,13,24,.78) 46%,rgba(6,13,24,.42) 100%);
  pointer-events:none;
}
.page-hero .container{position:relative;z-index:2}
.crumb{
  display:flex;align-items:center;gap:8px;flex-wrap:wrap;
  font-size:13px;color:var(--t-3);margin-bottom:14px;
}
.crumb a{color:var(--t-3)}
.crumb a:hover{color:var(--t-2)}
.crumb span.sep{opacity:.6}
.crumb .cur{color:var(--t-2)}
.page-hero h1{
  font-size:44px;
  line-height:1.2;
  margin-bottom:14px;
  background:linear-gradient(92deg,#EAF3FC 0%,#BFE7EE 100%);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.page-hero .lead{
  font-size:18px;
  line-height:1.8;
  color:var(--t-2);
  max-width:720px;
}
.hero-tags{display:flex;gap:10px;flex-wrap:wrap;margin-top:20px}

/* ============ 通用标签 ============ */
.tag{
  display:inline-flex;align-items:center;
  height:24px;padding:0 12px;
  border-radius:999px;
  font-size:12px;
  line-height:1;
  background:var(--glass);
  border:1px solid var(--line);
  color:var(--glow);
  white-space:nowrap;
}
.badge-hot{
  display:inline-flex;align-items:center;
  height:24px;padding:0 12px;
  border-radius:999px;
  font-size:12px;font-weight:700;line-height:1;
  background:var(--accent);
  color:#231402;
}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 28px;
  border-radius:999px;
  font-size:15px;font-weight:600;
  transition:transform var(--ease),box-shadow var(--ease),background var(--ease),border-color var(--ease),opacity var(--ease);
  white-space:nowrap;
}
.btn-primary{
  background:linear-gradient(94deg,#2A7BE4,#4FE0E8);
  color:#06121F;
  box-shadow:0 8px 26px rgba(79,224,232,.26);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 0 1px rgba(79,224,232,.4),0 14px 36px rgba(79,224,232,.36);color:#06121F}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{
  background:transparent;
  border:1px solid rgba(140,205,255,.35);
  color:#CFE2F5;
}
.btn-ghost:hover{background:var(--glass);border-color:var(--line-strong);color:var(--t-1);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(1px)}
.btn[disabled],.btn.is-disabled{opacity:.45;pointer-events:none}
.btn svg{width:17px;height:17px;stroke:currentColor;stroke-width:1.9;fill:none;stroke-linecap:round;stroke-linejoin:round}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:600;color:var(--glow);
}
.link-arrow svg{width:15px;height:15px;stroke:currentColor;stroke-width:2;fill:none;transition:transform var(--ease)}
.link-arrow:hover svg{transform:translateX(4px)}

/* ============ 区块 ============ */
.section{padding:88px 0}
.section--alt{background:var(--bg-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;
  gap:24px;margin-bottom:40px;flex-wrap:wrap;
}
.section-head h2{font-size:32px;line-height:1.3}
.section-head .sub{font-size:15px;color:var(--t-2);margin-top:10px;max-width:660px;line-height:1.8}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;letter-spacing:1.4px;color:var(--glow);
  text-transform:uppercase;margin-bottom:12px;font-weight:600;
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--line-strong)}

/* ============ 图文分栏 ============ */
.split{
  display:grid;
  grid-template-columns:1.05fr .95fr;
  gap:64px;
  align-items:center;
}
.split h2{font-size:32px;margin-bottom:18px}
.split p{color:var(--t-2);margin-bottom:16px;font-size:16px;line-height:1.85}
.check-list{display:grid;gap:12px;margin-top:24px}
.check-list li{
  display:flex;gap:10px;align-items:flex-start;
  font-size:15px;color:var(--t-2);line-height:1.75;
}
.check-list li svg{
  width:18px;height:18px;flex:0 0 18px;margin-top:5px;
  stroke:var(--glow);stroke-width:2.2;fill:none;stroke-linecap:round;stroke-linejoin:round;
}
.check-list li strong{color:var(--t-1);font-weight:600}
.media{
  position:relative;
  border-radius:var(--r-card);
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--sh-1);
}
.media img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform .5s ease}
.media:hover img{transform:scale(1.04)}
.media-caption{
  position:absolute;
  left:14px;right:14px;bottom:14px;
  padding:12px 16px;
  border-radius:14px;
  background:rgba(8,18,32,.78);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border:1px solid var(--line);
  font-size:13px;
  color:var(--t-2);
  line-height:1.7;
}
.media-caption strong{color:var(--t-1);display:block;font-size:14px;margin-bottom:2px}

/* ============ 时间轴 ============ */
.timeline{position:relative;padding-left:38px}
.timeline::before{
  content:"";position:absolute;left:9px;top:8px;bottom:8px;width:1px;
  background:linear-gradient(180deg,rgba(79,224,232,.5),rgba(120,190,255,.12));
}
.tl-item{position:relative;padding:0 0 32px 8px}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{
  content:"";position:absolute;left:-33px;top:7px;
  width:11px;height:11px;border-radius:50%;
  background:var(--glow);
  box-shadow:0 0 0 4px rgba(79,224,232,.14),0 0 14px rgba(79,224,232,.7);
}
.tl-item .stage{
  display:inline-block;
  font-size:12px;letter-spacing:.8px;color:var(--accent);
  font-weight:700;margin-bottom:6px;font-variant-numeric:tabular-nums;
}
.tl-item h3{font-size:20px;margin-bottom:8px}
.tl-item p{color:var(--t-2);font-size:15px;line-height:1.85;max-width:760px}

/* ============ 系列卡片 ============ */
.series-grid{
  display:grid;
  grid-template-columns:repeat(6,1fr);
  gap:24px;
}
.s-card{
  background:var(--bg-2);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
  box-shadow:var(--sh-1);
  transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease);
  display:flex;
  flex-direction:column;
}
.s-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--sh-glow)}
.s-card--lead{
  grid-column:span 6;
  flex-direction:row;
  align-items:stretch;
}
.s-card--sm{grid-column:span 2}
.s-card--lead .s-thumb{flex:0 0 46%;position:relative;overflow:hidden}
.s-card--lead .s-thumb img{height:100%;width:100%;object-fit:cover;border-radius:0;transition:transform .5s ease}
.s-card--lead:hover .s-thumb img{transform:scale(1.04)}
.s-body{padding:26px;display:flex;flex-direction:column;gap:12px;flex:1}
.s-card--lead .s-body{padding:38px}
.s-thumb{position:relative;overflow:hidden;aspect-ratio:4/3}
.s-thumb img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform .5s ease}
.s-card:hover .s-thumb img{transform:scale(1.04)}
.s-thumb .badge-hot{position:absolute;top:14px;left:14px}
.s-card h3{font-size:22px}
.s-card--sm h3{font-size:19px}
.s-card p{color:var(--t-2);font-size:15px;line-height:1.8}
.spec-row{
  display:flex;flex-wrap:wrap;gap:8px;margin-top:2px;
}
.spec-row span{
  font-size:12.5px;color:var(--t-2);
  padding:4px 10px;border-radius:999px;
  background:rgba(255,255,255,.04);
  border:1px solid var(--line);
  font-variant-numeric:tabular-nums;
}
.s-card .s-foot{
  margin-top:auto;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding-top:16px;border-top:1px solid var(--line);flex-wrap:wrap;
}
.price{font-size:18px;font-weight:700;color:var(--accent);font-variant-numeric:tabular-nums}
.price small{font-size:12.5px;color:var(--t-3);font-weight:400;margin-left:6px}

/* ============ 数据条 ============ */
.stat-band{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  background:var(--bg-2);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
  box-shadow:var(--sh-1);
}
.stat{
  padding:30px 26px;
  border-right:1px solid var(--line);
}
.stat:last-child{border-right:0}
.stat .k{font-size:13px;color:var(--t-3);margin-bottom:8px}
.stat .v{font-size:30px;font-weight:800;color:var(--t-1);line-height:1.2;font-variant-numeric:tabular-nums}
.stat .v em{font-style:normal;font-size:15px;color:var(--glow);margin-left:4px;font-weight:600}
.stat .d{font-size:13px;color:var(--t-2);margin-top:8px;line-height:1.7}

/* ============ 场景网格 ============ */
.scene-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.scene{
  display:flex;gap:16px;
  padding:24px;
  border-radius:var(--r-card);
  background:var(--bg-1);
  border:1px solid var(--line);
  transition:border-color var(--ease),transform var(--ease),background var(--ease);
}
.scene:hover{border-color:var(--line-strong);transform:translateY(-3px);background:var(--bg-2)}
.scene .ic{
  width:42px;height:42px;flex:0 0 42px;
  border-radius:12px;
  display:grid;place-items:center;
  background:rgba(79,224,232,.10);
  border:1px solid var(--line);
}
.scene .ic svg{width:20px;height:20px;stroke:var(--glow);stroke-width:1.8;fill:none;stroke-linecap:round;stroke-linejoin:round}
.scene h3{font-size:18px;margin-bottom:6px}
.scene p{font-size:14.5px;color:var(--t-2);line-height:1.8}

/* ============ FAQ ============ */
.faq-list{
  border-top:1px solid var(--line);
}
.faq-item{border-bottom:1px solid var(--line);position:relative}
.faq-q{
  width:100%;
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 6px 22px 0;
  text-align:left;
  font-size:17px;
  font-weight:600;
  color:var(--t-1);
  transition:color var(--ease),padding-left var(--ease);
}
.faq-q:hover{color:var(--glow)}
.faq-item.open .faq-q{padding-left:14px;color:var(--t-1)}
.faq-item::before{
  content:"";position:absolute;left:0;top:24px;bottom:24px;
  width:3px;border-radius:3px;background:var(--glow);
  opacity:0;transition:opacity var(--ease);
}
.faq-item.open::before{opacity:1}
.faq-ic{
  width:22px;height:22px;flex:0 0 22px;
  stroke:var(--glow);stroke-width:2;fill:none;stroke-linecap:round;
  transition:transform .22s ease;
}
.faq-item.open .faq-ic{transform:rotate(45deg)}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height .22s ease;
}
.faq-a p{
  padding:0 30px 24px 14px;
  font-size:15px;
  line-height:1.8;
  color:var(--t-2);
}

/* ============ CTA 带 ============ */
.cta-band{
  position:relative;
  border-radius:var(--r-card);
  padding:48px;
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
  background:linear-gradient(100deg,rgba(31,107,224,.20),rgba(79,224,232,.10)),var(--glass);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border:1px solid var(--line-strong);
  box-shadow:var(--sh-1);
  overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;right:-60px;top:-70px;
  width:260px;height:260px;border-radius:50%;
  background:radial-gradient(circle,rgba(79,224,232,.22),transparent 68%);
  pointer-events:none;
}
.cta-band .cta-text{position:relative;z-index:2;max-width:640px}
.cta-band h2{font-size:30px;margin-bottom:12px}
.cta-band p{color:var(--t-2);font-size:15.5px;line-height:1.8}
.cta-actions{position:relative;z-index:2;display:flex;gap:14px;flex-wrap:wrap}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--bg-1);
  border-top:1px solid var(--line);
  position:relative;
  padding-top:8px;
}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(79,224,232,.55),transparent);
}
.foot-grid{
  display:grid;
  grid-template-columns:1.35fr 1fr 1fr 1fr;
  gap:40px;
  padding:64px 0 40px;
}
.foot-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.foot-brand strong{font-size:16px;color:var(--t-1)}
.foot-desc{font-size:14px;color:var(--t-2);line-height:1.85;max-width:340px}
.foot-col h4{font-size:14px;color:var(--t-1);margin-bottom:14px;font-weight:600}
.foot-col ul{display:grid;gap:10px}
.foot-col a{font-size:14px;color:var(--t-2)}
.foot-col a:hover{color:var(--glow)}
.foot-col p{font-size:14px;color:var(--t-2);line-height:1.9;margin-bottom:6px}
.foot-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:20px 0 28px;border-top:1px solid var(--line);
  font-size:13px;color:var(--t-3);
}
.foot-bottom .domain{color:var(--t-3)}

/* ============ 响应式 ============ */
@media (max-width:1439px){
  :root{--nav-w:232px}
  .container{max-width:1200px}
}
@media (max-width:1279px){
  :root{--nav-w:216px}
  .container{padding:0 28px}
  .split{gap:44px}
  .page-hero h1{font-size:38px}
  .section-head h2,.split h2{font-size:28px}
  .s-card--sm{grid-column:span 3}
  .cta-band{padding:38px}
}
@media (max-width:1023px){
  .sidebar{display:none}
  .topbar{display:flex}
  .shell{margin-left:0;padding-top:64px}
  .container{padding:0 24px}
  .page-hero{height:250px}
  .page-hero h1{font-size:32px}
  .page-hero .lead{font-size:16.5px}
  .section{padding:64px 0}
  .split{grid-template-columns:1fr;gap:32px}
  .split .media{order:-1}
  .series-grid{grid-template-columns:repeat(4,1fr)}
  .s-card--lead{grid-column:span 4;flex-direction:column}
  .s-card--lead .s-thumb{flex:none;aspect-ratio:16/9}
  .s-card--sm{grid-column:span 2}
  .stat-band{grid-template-columns:repeat(2,1fr)}
  .stat:nth-child(2){border-right:0}
  .stat:nth-child(1),.stat:nth-child(2){border-bottom:1px solid var(--line)}
  .scene-grid{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:repeat(2,1fr);gap:32px;padding:48px 0 32px}
  .cta-band{padding:32px}
  .cta-band h2{font-size:24px}
}
@media (max-width:767px){
  body{font-size:15.5px}
  .container{padding:0 20px}
  .page-hero{height:200px}
  .page-hero h1{font-size:26px;margin-bottom:10px}
  .page-hero .lead{font-size:15px;line-height:1.75}
  .hero-tags{margin-top:14px}
  .crumb{font-size:12px;margin-bottom:10px}
  .section{padding:52px 0}
  .section-head{margin-bottom:28px}
  .section-head h2,.split h2{font-size:24px}
  .section-head .sub{font-size:14px}
  .split p{font-size:15px}
  .series-grid{grid-template-columns:1fr;gap:18px}
  .s-card--lead,.s-card--sm{grid-column:span 1}
  .s-card--lead .s-body{padding:24px}
  .s-body{padding:22px}
  .s-card h3,.s-card--sm h3{font-size:19px}
  .timeline{padding-left:30px}
  .tl-item::before{left:-26px}
  .tl-item h3{font-size:18px}
  .stat{padding:22px 18px}
  .stat .v{font-size:24px}
  .btn{height:44px;padding:0 22px;font-size:14.5px}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1}
  .faq-q{font-size:16px;padding:18px 4px 18px 0}
  .faq-a p{padding:0 20px 20px 12px}
  .foot-grid{grid-template-columns:1fr;gap:28px;padding:40px 0 28px}
  .foot-desc{max-width:none}
  .foot-bottom{flex-direction:column;align-items:flex-start;gap:8px}
}
@media (max-width:479px){
  .page-hero h1{font-size:23px}
  .stat-band{grid-template-columns:1fr}
  .stat{border-right:0;border-bottom:1px solid var(--line)}
  .stat:last-child{border-bottom:0}
  .cta-band{padding:24px}
  .cta-actions .btn{flex:1 1 100%}
}

/* roulang page: category2 */
:root{
  --bg-0:#060D18;
  --bg-1:#0A1526;
  --bg-2:#0E1B2E;
  --glass:rgba(255,255,255,.06);
  --brand:#1F6BE0;
  --glow:#4FE0E8;
  --accent:#F5A524;
  --line:rgba(120,190,255,.16);
  --line-strong:rgba(79,224,232,.40);
  --t-1:#E9F1FA;
  --t-2:#A9BCD0;
  --t-3:#6E8299;
  --r-sm:8px;
  --r-card:18px;
  --r-img:14px;
  --r-pill:999px;
  --sh-1:0 10px 30px rgba(2,8,18,.45);
  --sh-2:0 20px 50px rgba(2,8,18,.60);
  --sh-glow:0 0 0 1px rgba(79,224,232,.35), 0 8px 28px rgba(79,224,232,.22);
  --nav-w:240px;
  --ease:.28s cubic-bezier(.4,.15,.2,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--t-1);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans CJK SC",sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--glow);text-decoration:none;transition:color var(--ease);}
a:hover{color:#8BF0F5;}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit;}
h1,h2,h3,h4{margin:0;font-weight:600;letter-spacing:.2px;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--glow);outline-offset:2px;}
.num,.stat-num,td.num{font-variant-numeric:tabular-nums;}

/* ---------- 布局 ---------- */
.page{margin-left:var(--nav-w);min-height:100vh;}
.container{width:100%;max-width:1320px;margin:0 auto;padding:0 32px;}

/* ---------- 左侧竖向导航 ---------- */
.sidenav{
  position:fixed;
  top:0;left:0;bottom:0;
  width:var(--nav-w);
  display:flex;
  flex-direction:column;
  padding:26px 16px 20px;
  background:linear-gradient(180deg,rgba(14,27,46,.92),rgba(6,13,24,.94));
  border-right:1px solid var(--line);
  backdrop-filter:blur(14px);
  z-index:60;
}
.brand-block{display:flex;align-items:center;gap:10px;padding:0 6px 22px;border-bottom:1px solid var(--line);}
.brand-mark{
  display:inline-flex;align-items:center;justify-content:center;
  width:38px;height:38px;flex:0 0 38px;
  border-radius:12px;
  background:linear-gradient(135deg,#2A7BE4,#4FE0E8);
  color:#06121F;font-weight:800;font-size:14px;letter-spacing:.5px;
  box-shadow:0 6px 18px rgba(79,224,232,.26);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;}
.brand-text b{font-size:15px;font-weight:700;color:var(--t-1);}
.brand-text span{font-size:11px;color:var(--t-3);letter-spacing:.6px;}

.nav-list{margin-top:22px;display:flex;flex-direction:column;gap:4px;flex:1;overflow-y:auto;}
.nav-list a{
  position:relative;
  display:flex;align-items:center;gap:10px;
  min-height:46px;padding:10px 12px;
  border-radius:12px;
  color:var(--t-2);font-size:14.5px;
  transition:background var(--ease),color var(--ease);
}
.nav-list a svg{width:18px;height:18px;flex:0 0 18px;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;opacity:.85;}
.nav-list a::before{
  content:"";position:absolute;left:-16px;top:50%;transform:translateY(-50%);
  width:3px;height:0;border-radius:0 3px 3px 0;
  background:linear-gradient(180deg,#4FE0E8,#2A7BE4);
  box-shadow:0 0 12px rgba(79,224,232,.7);
  transition:height var(--ease);
}
.nav-list a:hover{background:var(--glass);color:var(--t-1);}
.nav-list a.active{background:var(--glass);color:var(--t-1);font-weight:600;}
.nav-list a.active::before{height:24px;}

.nav-foot{border-top:1px solid var(--line);padding-top:16px;}
.nav-consult{
  display:flex;flex-direction:column;gap:2px;
  padding:12px 14px;border-radius:14px;
  background:var(--glass);border:1px solid var(--line);
  color:var(--t-1);font-size:14px;font-weight:600;
  transition:border-color var(--ease),transform var(--ease);
}
.nav-consult:hover{border-color:var(--line-strong);transform:translateY(-2px);color:var(--t-1);}
.nav-consult em{font-style:normal;font-size:11.5px;color:var(--t-3);font-weight:400;}

/* ---------- 移动端顶栏 ---------- */
.topbar{
  display:none;
  position:sticky;top:0;z-index:70;
  height:64px;align-items:center;justify-content:space-between;
  padding:0 20px;
  background:rgba(8,17,30,.94);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(12px);
}
.topbar-logo{display:flex;align-items:center;gap:10px;color:var(--t-1);font-size:15px;font-weight:700;}
.burger{
  width:44px;height:44px;display:flex;align-items:center;justify-content:center;
  border-radius:12px;border:1px solid var(--line);background:var(--glass);
}
.burger svg{width:20px;height:20px;stroke:var(--t-1);fill:none;stroke-width:1.8;stroke-linecap:round;}

.drawer-mask{
  position:fixed;inset:0;background:rgba(3,10,20,.62);
  opacity:0;visibility:hidden;transition:opacity var(--ease),visibility var(--ease);z-index:80;
}
.drawer-mask.show{opacity:1;visibility:visible;}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:280px;max-width:84vw;
  background:linear-gradient(180deg,#0E1B2E,#08111E);
  border-left:1px solid var(--line);
  transform:translateX(100%);transition:transform var(--ease);
  z-index:90;padding:22px 18px;overflow-y:auto;
}
.drawer.open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:16px;border-bottom:1px solid var(--line);}
.drawer-head span{font-size:14px;font-weight:700;}
.drawer-close{width:40px;height:40px;border-radius:10px;border:1px solid var(--line);background:var(--glass);display:flex;align-items:center;justify-content:center;}
.drawer-close svg{width:18px;height:18px;stroke:var(--t-1);fill:none;stroke-width:1.8;stroke-linecap:round;}
.drawer nav{margin-top:16px;display:flex;flex-direction:column;gap:4px;}
.drawer nav a{
  position:relative;display:flex;align-items:center;min-height:48px;padding:10px 14px;
  border-radius:12px;color:var(--t-2);font-size:15px;
}
.drawer nav a.active{background:var(--glass);color:var(--t-1);font-weight:600;}
.drawer nav a.active::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:3px;height:22px;border-radius:0 3px 3px 0;background:var(--glow);
  box-shadow:0 0 12px rgba(79,224,232,.7);
}

/* ---------- 通用组件 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 28px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;white-space:nowrap;
  transition:transform var(--ease),box-shadow var(--ease),background var(--ease),border-color var(--ease);
}
.btn-primary{
  background:linear-gradient(135deg,#2A7BE4,#4FE0E8);
  color:#06121F;
  box-shadow:var(--sh-glow);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 0 1px rgba(79,224,232,.5),0 14px 36px rgba(79,224,232,.34);color:#06121F;}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{
  background:transparent;color:#CFE2F5;border:1px solid rgba(140,205,255,.35);
}
.btn-ghost:hover{background:var(--glass);border-color:var(--line-strong);color:#EAF6FF;transform:translateY(-2px);}
.btn-ghost:active{transform:translateY(1px);}
.btn[disabled],.btn.is-disabled{opacity:.45;pointer-events:none;box-shadow:none;transform:none;}
.btn-link{
  display:inline-flex;align-items:center;gap:6px;color:var(--glow);font-size:14.5px;font-weight:600;
}
.btn-link svg{width:16px;height:16px;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;transition:transform var(--ease);}
.btn-link:hover svg{transform:translateX(4px);}

.chip{
  display:inline-flex;align-items:center;height:24px;padding:0 12px;border-radius:var(--r-pill);
  background:var(--glass);color:var(--glow);font-size:12px;border:1px solid var(--line);
}
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 12px;border-radius:var(--r-pill);
  background:var(--accent);color:#1B1200;font-size:12px;font-weight:700;
}

.section{padding:88px 0;}
.section.alt{background:var(--bg-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;flex-wrap:wrap;}
.sec-head h2{font-size:32px;line-height:1.3;}
.sec-head p{color:var(--t-2);font-size:15px;margin-top:10px;max-width:660px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;margin-bottom:14px;
  font-size:12.5px;letter-spacing:1.6px;color:var(--glow);text-transform:uppercase;
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--glow);box-shadow:0 0 8px rgba(79,224,232,.8);}

/* ---------- 横幅 ---------- */
.page-banner{position:relative;height:300px;overflow:hidden;border-bottom:1px solid var(--line);}
.banner-bg{
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
}
.banner-bg::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(6,13,24,.94) 12%,rgba(6,13,24,.74) 55%,rgba(6,13,24,.44) 100%);
}
.banner-grid{
  content:"";position:absolute;inset:0;opacity:.05;
  background-image:linear-gradient(rgba(120,190,255,.6) 1px,transparent 1px),linear-gradient(90deg,rgba(120,190,255,.6) 1px,transparent 1px);
  background-size:56px 56px;
}
.banner-glow{
  position:absolute;top:-120px;right:6%;width:520px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(79,224,232,.20),transparent 68%);pointer-events:none;
}
.banner-inner{position:relative;z-index:2;height:100%;display:flex;flex-direction:column;justify-content:center;}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--t-3);margin-bottom:16px;}
.breadcrumb a{color:var(--t-3);}
.breadcrumb a:hover{color:var(--glow);}
.breadcrumb .cur{color:var(--t-2);}
.page-banner h1{font-size:44px;line-height:1.2;max-width:820px;}
.page-banner .banner-sub{margin-top:16px;font-size:18px;color:var(--t-2);max-width:680px;line-height:1.75;}

/* ---------- 实时状态条 ---------- */
.live-strip{background:var(--bg-1);border-bottom:1px solid var(--line);}
.live-inner{display:flex;align-items:center;gap:16px;flex-wrap:wrap;padding-top:14px;padding-bottom:14px;font-size:13.5px;color:var(--t-2);}
.live-dot{
  width:8px;height:8px;border-radius:50%;background:var(--glow);
  box-shadow:0 0 0 4px rgba(79,224,232,.16);animation:pulse 2.2s infinite;
}
@keyframes pulse{
  0%,100%{box-shadow:0 0 0 4px rgba(79,224,232,.16);}
  50%{box-shadow:0 0 0 8px rgba(79,224,232,.05);}
}
.live-sep{width:1px;height:14px;background:var(--line);}

/* ---------- 数据条 ---------- */
.stat-bar{
  display:grid;grid-template-columns:repeat(4,1fr);
  background:var(--glass);border:1px solid var(--line);border-radius:var(--r-card);
  backdrop-filter:blur(10px);overflow:hidden;box-shadow:var(--sh-1);
}
.stat-item{padding:28px 26px;border-right:1px solid var(--line);}
.stat-item:last-child{border-right:0;}
.stat-num{font-size:30px;font-weight:700;color:var(--t-1);line-height:1.2;}
.stat-num b{color:var(--glow);font-size:20px;font-weight:700;margin-left:2px;}
.stat-item span{display:block;margin-top:8px;font-size:13.5px;color:var(--t-3);}

/* ---------- Z 字交错 ---------- */
.zig-row{
  display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center;
  padding:56px 0;border-bottom:1px solid var(--line);
}
.zig-row:last-child{border-bottom:0;}
.zig-row.reverse .zig-media{order:2;}
.zig-media{
  position:relative;border-radius:var(--r-img);overflow:hidden;
  border:1px solid var(--line);box-shadow:var(--sh-1);
  aspect-ratio:16/10;background:var(--bg-2);
  transition:border-color var(--ease),box-shadow var(--ease);
}
.zig-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease;}
.zig-media:hover{border-color:var(--line-strong);box-shadow:var(--sh-2);}
.zig-media:hover img{transform:scale(1.04);}
.zig-media .media-tag{
  position:absolute;left:16px;top:16px;
}
.zig-body h2{font-size:30px;line-height:1.35;margin-bottom:18px;}
.zig-body p{color:var(--t-2);font-size:16px;line-height:1.85;margin-bottom:16px;}
.zig-list{margin-top:22px;display:flex;flex-direction:column;gap:12px;}
.zig-list li{
  position:relative;padding-left:28px;color:var(--t-2);font-size:15px;line-height:1.75;
}
.zig-list li::before{
  content:"";position:absolute;left:0;top:9px;
  width:14px;height:14px;border-radius:50%;
  background:rgba(79,224,232,.14);border:1px solid rgba(79,224,232,.5);
}
.zig-list li::after{
  content:"";position:absolute;left:4.5px;top:13.5px;
  width:5px;height:5px;border-radius:50%;background:var(--glow);
}
.zig-list li strong{color:var(--t-1);font-weight:600;}

/* ---------- 材料清单卡 ---------- */
.doc-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.doc-card{
  background:var(--bg-2);border:1px solid var(--line);border-radius:var(--r-card);
  padding:28px 26px;box-shadow:var(--sh-1);
  transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease);
}
.doc-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--sh-2);}
.doc-card .doc-ico{
  width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  background:rgba(79,224,232,.10);border:1px solid rgba(79,224,232,.28);margin-bottom:18px;
}
.doc-card .doc-ico svg{width:20px;height:20px;stroke:var(--glow);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;}
.doc-card h3{font-size:19px;margin-bottom:10px;}
.doc-card p{color:var(--t-2);font-size:14.5px;line-height:1.8;}
.doc-card .doc-meta{margin-top:18px;padding-top:16px;border-top:1px solid var(--line);font-size:13px;color:var(--t-3);}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:920px;margin:0 auto;border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);position:relative;}
.faq-item::before{
  content:"";position:absolute;left:0;top:14px;width:3px;height:0;border-radius:3px;
  background:var(--glow);transition:height var(--ease);box-shadow:0 0 10px rgba(79,224,232,.6);
}
.faq-item.open::before{height:26px;}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:24px 8px 24px 20px;text-align:left;
  font-size:17px;font-weight:600;color:var(--t-1);line-height:1.6;
}
.faq-q .plus{
  position:relative;flex:0 0 26px;width:26px;height:26px;border-radius:50%;
  border:1px solid var(--line);transition:transform .22s ease,border-color var(--ease);
}
.faq-q .plus::before,.faq-q .plus::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--glow);border-radius:2px;
  transform:translate(-50%,-50%);
}
.faq-q .plus::before{width:11px;height:1.6px;}
.faq-q .plus::after{width:1.6px;height:11px;}
.faq-item.open .faq-q .plus{transform:rotate(45deg);border-color:var(--line-strong);}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height .22s ease;
}
.faq-item.open .faq-a{max-height:360px;}
.faq-a p{padding:0 60px 26px 20px;color:var(--t-2);font-size:15px;line-height:1.8;}

/* ---------- 底部 CTA ---------- */
.cta-band{
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:24px;
  backdrop-filter:blur(14px);
  padding:44px 46px;
  display:flex;align-items:center;justify-content:space-between;gap:36px;
  box-shadow:var(--sh-1);
  position:relative;overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;right:-80px;top:-100px;width:360px;height:320px;border-radius:50%;
  background:radial-gradient(circle,rgba(79,224,232,.16),transparent 68%);pointer-events:none;
}
.cta-left{display:flex;align-items:center;gap:22px;position:relative;z-index:2;}
.cta-thumb{
  width:96px;height:72px;border-radius:14px;object-fit:cover;flex:0 0 96px;
  border:1px solid var(--line);
}
.cta-left h2{font-size:28px;line-height:1.35;margin-bottom:8px;}
.cta-left p{color:var(--t-2);font-size:15px;}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;position:relative;z-index:2;}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:96px;
  background:var(--bg-1);
  border-top:1px solid var(--line);
  position:relative;
}
.site-footer::before{
  content:"";position:absolute;top:-1px;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(79,224,232,.55),transparent);
  box-shadow:0 0 14px rgba(79,224,232,.35);
}
.foot-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;
  padding:64px 0 44px;
}
.foot-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.foot-brand strong{font-size:16px;}
.foot-desc{color:var(--t-3);font-size:14px;line-height:1.8;max-width:380px;}
.foot-col h4{font-size:14px;color:var(--t-1);margin-bottom:18px;letter-spacing:.4px;}
.foot-col p{color:var(--t-3);font-size:13.5px;line-height:1.9;}
.foot-col ul{display:flex;flex-direction:column;gap:11px;}
.foot-col ul a{color:var(--t-3);font-size:13.5px;position:relative;}
.foot-col ul a::after{
  content:"";position:absolute;left:0;bottom:-3px;width:0;height:1px;background:var(--glow);
  transition:width var(--ease);
}
.foot-col ul a:hover{color:var(--glow);}
.foot-col ul a:hover::after{width:100%;}
.foot-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(--t-3);
}
.foot-bottom .domain{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;letter-spacing:.4px;}

/* ---------- 响应式 ---------- */
@media (max-width:1439px){
  .page-banner h1{font-size:40px;}
}
@media (max-width:1279px){
  :root{--nav-w:216px;}
  .zig-row{gap:44px;}
  .page-banner h1{font-size:36px;}
  .sec-head h2{font-size:28px;}
}
@media (max-width:1023px){
  .page{margin-left:0;}
  .sidenav{display:none;}
  .topbar{display:flex;}
  .page-banner{height:200px;}
  .page-banner h1{font-size:30px;}
  .page-banner .banner-sub{font-size:15px;margin-top:12px;}
  .section{padding:56px 0;}
  .zig-row{grid-template-columns:1fr;gap:28px;padding:40px 0;}
  .zig-row.reverse .zig-media{order:0;}
  .stat-bar{grid-template-columns:repeat(2,1fr);}
  .stat-item:nth-child(2){border-right:0;}
  .stat-item:nth-child(1),.stat-item:nth-child(2){border-bottom:1px solid var(--line);}
  .doc-grid{grid-template-columns:repeat(2,1fr);}
  .cta-band{flex-direction:column;align-items:flex-start;padding:32px 26px;}
  .foot-grid{grid-template-columns:repeat(2,1fr);gap:32px;padding:48px 0 32px;}
}
@media (max-width:767px){
  .container{padding:0 20px;}
  .section{padding:48px 0;}
  .page-banner{height:200px;}
  .page-banner h1{font-size:26px;}
  .zig-body h2{font-size:23px;}
  .sec-head h2{font-size:24px;}
  .doc-grid{grid-template-columns:1fr;}
  .live-inner{gap:10px;font-size:12.5px;}
  .live-sep{display:none;}
  .faq-q{font-size:16px;padding:20px 4px 20px 16px;}
  .faq-a p{padding:0 24px 22px 16px;}
  .cta-left h2{font-size:22px;}
  .btn{height:44px;padding:0 22px;font-size:14.5px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{flex:1 1 auto;}
}
@media (max-width:519px){
  .stat-bar{grid-template-columns:1fr;}
  .stat-item{border-right:0;border-bottom:1px solid var(--line);padding:22px;}
  .stat-item:last-child{border-bottom:0;}
  .foot-grid{grid-template-columns:1fr;gap:28px;}
  .cta-left{flex-direction:column;align-items:flex-start;}
  .cta-thumb{width:100%;height:130px;flex:0 0 auto;}
  .btn{width:100%;}
  .cta-actions{flex-direction:column;}
}

/* roulang page: category3 */
:root{
  --bg-0:#060D18;
  --bg-1:#0A1526;
  --bg-2:#0E1B2E;
  --glass:rgba(255,255,255,.06);
  --brand:#1F6BE0;
  --glow:#4FE0E8;
  --accent:#F5A524;
  --line:rgba(120,190,255,.16);
  --line-strong:rgba(79,224,232,.40);
  --t-1:#E9F1FA;
  --t-2:#A9BCD0;
  --t-3:#6E8299;
  --r-sm:8px;
  --r-card:18px;
  --r-img:14px;
  --r-pill:999px;
  --sh-1:0 10px 30px rgba(2,8,18,.45);
  --sh-2:0 20px 50px rgba(2,8,18,.60);
  --sh-glow:0 0 0 1px rgba(79,224,232,.35), 0 8px 28px rgba(79,224,232,.22);
  --sidebar-w:240px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--t-1);
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none;transition:color .2s ease,background-color .2s ease,border-color .2s ease}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
svg{display:block}
:focus-visible{outline:2px solid var(--glow);outline-offset:2px}
.container{width:100%;max-width:1320px;margin:0 auto;padding:0 32px}

/* ============ 顶部移动栏 ============ */
.topbar{
  display:none;
  position:fixed;
  top:0;left:0;right:0;
  height:64px;
  padding:0 20px;
  align-items:center;
  justify-content:space-between;
  background:rgba(8,17,31,.88);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  z-index:90;
}
.topbar-logo{display:flex;align-items:center;gap:10px;font-size:15px;font-weight:600;letter-spacing:.01em}
.brand-mark{
  width:36px;height:36px;flex:none;
  border-radius:12px;
  display:grid;place-items:center;
  font-size:13px;font-weight:800;letter-spacing:.06em;
  color:#06121F;
  background:linear-gradient(135deg,#2A7BE4,#4FE0E8);
}
.burger{width:44px;height:44px;display:grid;place-items:center;border-radius:12px;border:1px solid var(--line);background:var(--glass)}
.burger svg{width:22px;height:22px;stroke:var(--t-1);fill:none;stroke-width:1.8;stroke-linecap:round}

/* ============ 左侧竖向导航 ============ */
.sidebar{
  position:fixed;
  top:0;left:0;bottom:0;
  width:var(--sidebar-w);
  display:flex;
  flex-direction:column;
  gap:22px;
  padding:26px 18px 22px;
  background:rgba(10,21,38,.74);
  -webkit-backdrop-filter:blur(16px);
  backdrop-filter:blur(16px);
  border-right:1px solid var(--line);
  z-index:80;
  overflow-y:auto;
}
.sidebar-brand{display:flex;align-items:center;gap:12px;padding:4px 6px 0}
.brand-text{display:flex;flex-direction:column;line-height:1.35}
.brand-text strong{font-size:15px;font-weight:700;color:var(--t-1)}
.brand-text span{font-size:12.5px;color:var(--t-3);letter-spacing:.02em}
.nav-list{display:flex;flex-direction:column;gap:4px}
.nav-item{
  position:relative;
  display:flex;
  align-items:center;
  gap:10px;
  min-height:44px;
  padding:0 12px 0 14px;
  border-radius:12px;
  font-size:15px;
  color:var(--t-2);
}
.nav-item svg{width:18px;height:18px;flex:none;stroke:currentColor;fill:none;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.nav-item::before{
  content:"";
  position:absolute;left:0;top:50%;
  transform:translateY(-50%);
  width:3px;height:0;border-radius:3px;
  background:var(--glow);
  box-shadow:0 0 10px rgba(79,224,232,.8);
  transition:height .22s ease;
}
.nav-item:hover{color:var(--t-1);background:var(--glass)}
.nav-item:hover::before{height:18px}
.nav-item.active{color:var(--t-1);background:var(--glass)}
.nav-item.active::before{height:24px}
.sidebar-foot{margin-top:auto;display:flex;flex-direction:column;gap:12px;padding-top:20px;border-top:1px solid var(--line)}
.side-cta{
  display:flex;align-items:center;justify-content:center;
  height:44px;border-radius:var(--r-pill);
  font-size:14.5px;font-weight:600;color:#06121F;
  background:linear-gradient(135deg,#2A7BE4,#4FE0E8);
  box-shadow:var(--sh-glow);
}
.side-cta:hover{transform:translateY(-2px)}
.side-note{font-size:12.5px;color:var(--t-3);line-height:1.6;padding-left:2px}

/* ============ 移动抽屉 ============ */
.overlay{
  position:fixed;inset:0;background:rgba(3,10,20,.62);
  opacity:0;visibility:hidden;transition:opacity .3s ease,visibility .3s ease;
  z-index:95;
}
.overlay.show{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;bottom:0;
  width:280px;
  padding:20px 16px;
  display:flex;flex-direction:column;gap:12px;
  background:rgba(9,20,36,.98);
  border-left:1px solid var(--line);
  transform:translateX(100%);
  transition:transform .3s ease;
  z-index:100;
  overflow-y:auto;
}
.drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;gap:10px;padding:4px 4px 14px;border-bottom:1px solid var(--line)}
.drawer-title{font-size:15px;font-weight:600;flex:1}
.drawer-close{width:40px;height:40px;display:grid;place-items:center;border-radius:10px;border:1px solid var(--line);font-size:16px;color:var(--t-2)}
.drawer-foot{margin-top:auto;padding-top:16px;border-top:1px solid var(--line);font-size:13px;color:var(--t-3);line-height:1.7}

/* ============ 主区域 ============ */
.main{margin-left:var(--sidebar-w);display:block;min-height:100vh}

/* ============ 横幅 ============ */
.page-banner{
  position:relative;
  min-height:300px;
  display:flex;
  align-items:center;
  padding:64px 0 56px;
  background:url(/assets/images/backpic/back-2.png) center/cover no-repeat;
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.page-banner::before{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(900px 380px at 10% 15%,rgba(79,224,232,.20),transparent 62%),
    linear-gradient(90deg,rgba(6,13,24,.95) 0%,rgba(6,13,24,.86) 46%,rgba(6,13,24,.60) 100%);
}
.page-banner::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.55;
  background-image:
    linear-gradient(rgba(120,190,255,.055) 1px,transparent 1px),
    linear-gradient(90deg,rgba(120,190,255,.055) 1px,transparent 1px);
  background-size:52px 52px;
}
.banner-inner{position:relative;z-index:2;width:100%}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--t-3);margin-bottom:18px}
.breadcrumb a:hover{color:var(--glow)}
.breadcrumb .sep{opacity:.6}
.breadcrumb .current{color:var(--t-2)}
.page-banner h1{font-size:44px;line-height:1.2;letter-spacing:-.01em;max-width:820px}
.banner-lead{margin-top:18px;font-size:18px;line-height:1.8;color:var(--t-2);max-width:720px}
.banner-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.tag{
  display:inline-flex;align-items:center;height:24px;padding:0 12px;
  border-radius:var(--r-pill);font-size:12px;
  background:var(--glass);color:var(--glow);border:1px solid var(--line);
}

/* ============ 通用板块 ============ */
.section{padding:96px 0}
.section.alt{background:var(--bg-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:32px;margin-bottom:40px}
.section-head h2{font-size:32px;line-height:1.3}
.section-head p{margin-top:12px;font-size:15px;color:var(--t-2);max-width:640px;line-height:1.8}
.section-head .head-side{font-size:14px;color:var(--t-3);white-space:nowrap;padding-bottom:6px}

/* ============ 选型速览卡 ============ */
.pick-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.pick-card{
  display:flex;flex-direction:column;
  background:var(--bg-2);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
  box-shadow:var(--sh-1);
  transition:transform .28s ease,border-color .28s ease,box-shadow .28s ease;
}
.pick-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--sh-2),var(--sh-glow)}
.pick-thumb{position:relative;aspect-ratio:4/3;overflow:hidden;background:#08111F}
.pick-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.pick-card:hover .pick-thumb img{transform:scale(1.04)}
.pick-thumb::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(6,13,24,.10),rgba(6,13,24,.72))}
.badge{
  position:absolute;top:14px;left:14px;z-index:2;
  display:inline-flex;align-items:center;height:24px;padding:0 10px;
  border-radius:var(--r-pill);font-size:12px;font-weight:600;
  background:var(--accent);color:#1B1200;
}
.pick-body{padding:22px 20px 24px;display:flex;flex-direction:column;flex:1}
.pick-body h3{font-size:22px;line-height:1.45;font-variant-numeric:tabular-nums}
.pick-body .pick-desc{margin-top:8px;font-size:14px;color:var(--t-2);line-height:1.7;min-height:48px}
.pick-spec{margin-top:18px;border-top:1px solid var(--line);padding-top:14px;display:flex;flex-direction:column;gap:9px}
.pick-spec li{display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:13.5px;color:var(--t-3)}
.pick-spec li strong{color:var(--t-1);font-weight:600;font-variant-numeric:tabular-nums}
.btn-link{
  margin-top:auto;padding-top:20px;
  display:inline-flex;align-items:center;gap:8px;
  font-size:14px;font-weight:600;color:var(--glow);
}
.btn-link svg{width:16px;height:16px;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;transition:transform .2s ease}
.btn-link:hover svg{transform:translateX(4px)}

/* ============ 规格对比表 ============ */
.table-wrap{
  border:1px solid var(--line);
  border-radius:var(--r-card);
  background:var(--bg-2);
  overflow-x:auto;
  box-shadow:var(--sh-1);
}
table.spec{width:100%;min-width:920px;border-collapse:collapse;font-size:15px}
.spec th,.spec td{padding:16px 18px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
.spec thead th{
  background:#122238;
  font-size:14px;font-weight:600;color:var(--t-1);
  letter-spacing:.02em;white-space:nowrap;
}
.spec thead th:first-child{color:var(--t-3);font-weight:500}
.spec thead th span{display:block;font-size:12px;font-weight:400;color:var(--t-3);margin-top:3px}
.spec tbody td{color:var(--t-2);font-variant-numeric:tabular-nums}
.spec tbody td:first-child{
  color:var(--t-1);font-weight:500;
  background:rgba(255,255,255,.02);
  white-space:nowrap;
}
.spec tbody tr{transition:background-color .2s ease}
.spec tbody tr:hover td{background:var(--glass)}
.spec tbody tr:last-child td{border-bottom:0}
.spec .hl{color:var(--accent);font-weight:600}
.table-note{margin-top:16px;font-size:13px;color:var(--t-3);line-height:1.7}

/* ============ 图文选型建议 ============ */
.scene-grid{display:grid;grid-template-columns:1.02fr .98fr;gap:56px;align-items:center}
.scene-media{position:relative;border-radius:var(--r-img);overflow:hidden;border:1px solid var(--line);background:#08111F}
.scene-media img{width:100%;aspect-ratio:16/11;object-fit:cover;border-radius:var(--r-img)}
.scene-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(6,13,24,0),rgba(6,13,24,.42))}
.scene-text h2{font-size:32px;line-height:1.3}
.scene-text p{margin-top:16px;font-size:16px;color:var(--t-2);line-height:1.85}
.tick-list{margin-top:24px;display:flex;flex-direction:column;gap:14px}
.tick-list li{display:flex;gap:12px;font-size:15px;color:var(--t-2);line-height:1.75}
.tick-list svg{width:20px;height:20px;flex:none;margin-top:4px;stroke:var(--glow);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.tick-list strong{color:var(--t-1);font-weight:600}

/* ============ 流程步骤 ============ */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.step{
  position:relative;
  background:var(--bg-2);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:28px 24px 26px;
  transition:transform .28s ease,border-color .28s ease,box-shadow .28s ease;
}
.step:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--sh-2)}
.step-num{font-size:38px;font-weight:800;line-height:1;color:var(--accent);font-variant-numeric:tabular-nums}
.step h3{margin-top:16px;font-size:19px;line-height:1.5}
.step p{margin-top:10px;font-size:14px;color:var(--t-2);line-height:1.8}

/* ============ FAQ ============ */
.faq{max-width:940px;margin:0 auto;border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  position:relative;
  width:100%;
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding:22px 4px;
  font-size:17px;font-weight:600;text-align:left;
  transition:padding-left .22s ease,color .2s ease;
}
.faq-q:hover{color:var(--glow)}
.faq-q::before{
  content:"";position:absolute;left:0;top:50%;
  transform:translateY(-50%);
  width:3px;height:0;border-radius:3px;background:var(--glow);
  transition:height .22s ease;
}
.faq-item.open .faq-q{padding-left:16px}
.faq-item.open .faq-q::before{height:22px}
.faq-icon{flex:none;width:22px;height:22px;position:relative;transition:transform .22s ease}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--glow);border-radius:2px;
  left:50%;top:50%;
}
.faq-icon::before{width:14px;height:2px;transform:translate(-50%,-50%)}
.faq-icon::after{width:2px;height:14px;transform:translate(-50%,-50%)}
.faq-item.open .faq-icon{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .26s ease}
.faq-a p{padding:0 46px 22px 4px;font-size:15px;line-height:1.8;color:var(--t-2)}
.faq-item.open .faq-a p{padding-left:16px}

/* ============ CTA 带 ============ */
.cta-band{
  display:flex;align-items:center;gap:36px;
  padding:40px;
  border-radius:var(--r-card);
  border:1px solid var(--line);
  background:var(--glass);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  box-shadow:var(--sh-1);
}
.cta-thumb{
  width:120px;height:88px;flex:none;border-radius:var(--r-sm);overflow:hidden;
  border:1px solid var(--line);background:#08111F;
}
.cta-thumb img{width:100%;height:100%;object-fit:cover}
.cta-copy{flex:1}
.cta-copy h2{font-size:28px;line-height:1.35}
.cta-copy p{margin-top:10px;font-size:15px;color:var(--t-2);max-width:560px}
.cta-actions{display:flex;gap:14px;flex:none}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  height:48px;padding:0 28px;
  border-radius:var(--r-pill);
  font-size:15px;font-weight:600;white-space:nowrap;
  transition:transform .2s ease,box-shadow .22s ease,background-color .22s ease,border-color .22s ease;
}
.btn-primary{background:linear-gradient(135deg,#2A7BE4,#4FE0E8);color:#06121F;box-shadow:var(--sh-glow)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 0 1px rgba(79,224,232,.5),0 14px 36px rgba(79,224,232,.34)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:transparent;border:1px solid rgba(140,205,255,.35);color:#CFE2F5}
.btn-ghost:hover{background:var(--glass);border-color:var(--line-strong);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(1px)}

/* ============ 页脚 ============ */
.site-footer{
  margin-top:0;
  background:var(--bg-1);
  border-top:1px solid var(--line-strong);
  box-shadow:0 -1px 24px rgba(79,224,232,.12);
  padding:64px 0 32px;
}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px}
.foot-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.foot-brand strong{font-size:16px;font-weight:700}
.foot-desc{font-size:14px;color:var(--t-2);line-height:1.85;max-width:340px}
.foot-col h4{font-size:15px;font-weight:600;margin-bottom:16px;color:var(--t-1)}
.foot-col ul{display:flex;flex-direction:column;gap:10px}
.foot-col a{font-size:14px;color:var(--t-2);position:relative;width:fit-content}
.foot-col a::after{
  content:"";position:absolute;left:0;bottom:-2px;height:1px;width:100%;
  background:var(--glow);transform:scaleX(0);transform-origin:left;
  transition:transform .24s ease;
}
.foot-col a:hover{color:var(--t-1)}
.foot-col a:hover::after{transform:scaleX(1)}
.foot-col p{font-size:14px;color:var(--t-2);line-height:1.85;margin-bottom:8px}
.foot-bottom{
  margin-top:48px;padding-top:22px;
  border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  font-size:13px;color:var(--t-3);
}
.foot-bottom .domain{font-variant-numeric:tabular-nums;letter-spacing:.02em}

/* ============ 响应式 ============ */
@media (max-width:1440px){
  .page-banner h1{font-size:40px}
}
@media (max-width:1279px){
  :root{--sidebar-w:216px}
  .pick-grid{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .scene-grid{gap:40px}
  .section{padding:80px 0}
}
@media (max-width:1023px){
  .sidebar{display:none}
  .topbar{display:flex}
  .main{margin-left:0;padding-top:64px}
  .page-banner{padding:48px 0 44px;min-height:260px}
  .page-banner h1{font-size:34px}
  .banner-lead{font-size:16.5px}
  .cta-band{flex-wrap:wrap;gap:24px;padding:32px}
  .cta-actions{width:100%}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:768px){
  .container{padding:0 20px}
  .section{padding:56px 0}
  .section-head{flex-direction:column;align-items:flex-start;gap:14px;margin-bottom:28px}
  .section-head h2{font-size:24px}
  .scene-text h2{font-size:24px}
  .page-banner{min-height:200px;padding:36px 0 34px}
  .page-banner h1{font-size:30px}
  .banner-lead{font-size:16px;margin-top:14px}
  .scene-grid{grid-template-columns:1fr;gap:28px}
  .pick-grid{grid-template-columns:1fr 1fr;gap:16px}
  .pick-body h3{font-size:19px}
  .steps{grid-template-columns:1fr;gap:16px}
  .cta-copy h2{font-size:22px}
  .cta-thumb{width:96px;height:72px}
  .btn{height:44px;padding:0 22px;font-size:14.5px}
  .foot-grid{grid-template-columns:1fr;gap:28px}
  .foot-bottom{flex-direction:column;align-items:flex-start;gap:8px}
  .faq-q{font-size:16px;padding:18px 4px}
  .faq-a p{padding-right:12px}
  .section-head .head-side{padding-bottom:0}
}
@media (max-width:480px){
  .pick-grid{grid-template-columns:1fr}
  .cta-actions{flex-direction:column}
  .cta-actions .btn{width:100%}
  .page-banner h1{font-size:26px}
  .banner-tags{gap:8px}
  .banner-tags .tag{height:22px;font-size:11.5px}
}

/* roulang page: category4 */
:root{
  --bg-0:#060D18;
  --bg-1:#0A1526;
  --bg-2:#0E1B2E;
  --glass:rgba(255,255,255,.06);
  --brand:#1F6BE0;
  --glow:#4FE0E8;
  --accent:#F5A524;
  --line:rgba(120,190,255,.16);
  --line-strong:rgba(79,224,232,.40);
  --t-1:#E9F1FA;
  --t-2:#A9BCD0;
  --t-3:#6E8299;
  --danger:#FF6B6B;
  --r-sm:8px;
  --r-card:18px;
  --r-img:14px;
  --r-pill:999px;
  --sh-1:0 10px 30px rgba(2,8,18,.45);
  --sh-2:0 20px 50px rgba(2,8,18,.60);
  --sh-glow:0 0 0 1px rgba(79,224,232,.35),0 8px 28px rgba(79,224,232,.22);
  --sp-1:8px;
  --sp-2:16px;
  --sp-3:24px;
  --sp-4:32px;
  --sp-5:48px;
  --sp-6:64px;
  --sp-7:96px;
  --sidebar-w:240px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  background:var(--bg-0);
  color:var(--t-1);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none}
a{color:inherit;text-decoration:none;transition:color .22s ease,border-color .22s ease,background-color .22s ease}
a:hover{color:var(--glow)}
button,input,textarea,select{font:inherit;color:inherit}
button{cursor:pointer;background:none;border:none}
h1,h2,h3,h4,p,ul,ol{margin:0}
ul{padding:0;list-style:none}
svg{display:block}
.num{font-variant-numeric:tabular-nums}
::selection{background:rgba(79,224,232,.28)}

/* ---------- layout ---------- */
.layout{display:flex;min-height:100vh}
.main-wrap{margin-left:var(--sidebar-w);width:calc(100% - var(--sidebar-w));min-width:0}
.container{max-width:1320px;margin:0 auto;padding:0 32px;width:100%}
.section{padding:88px 0}
.section--alt{background:var(--bg-1)}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px}
.sec-head h2{font-size:32px;line-height:1.3;font-weight:700;letter-spacing:.2px}
.sec-head p{margin-top:12px;color:var(--t-2);max-width:720px;font-size:15px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12px;letter-spacing:2px;color:var(--glow);text-transform:uppercase;margin-bottom:14px}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--glow);opacity:.8}
.arrow-link{display:inline-flex;align-items:center;gap:8px;font-size:14px;color:var(--glow);white-space:nowrap}
.arrow-link span{transition:transform .22s ease}
.arrow-link:hover span{transform:translateX(4px)}

/* ---------- sidebar ---------- */
.sidebar{
  position:fixed;left:0;top:0;width:var(--sidebar-w);height:100vh;
  background:rgba(9,19,34,.92);
  border-right:1px solid var(--line);
  backdrop-filter:blur(14px);
  display:flex;flex-direction:column;
  padding:28px 18px 22px;
  z-index:60;
}
.brand{display:flex;align-items:center;gap:10px;padding:0 8px 22px;border-bottom:1px solid var(--line)}
.brand-mark{
  width:38px;height:38px;flex:0 0 38px;border-radius:12px;
  background:linear-gradient(140deg,#2A7BE4,#4FE0E8);
  color:#06121F;font-weight:800;font-size:15px;letter-spacing:.5px;
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 6px 18px rgba(79,224,232,.22);
}
.brand-text{display:flex;flex-direction:column;line-height:1.35;min-width:0}
.brand-text strong{font-size:15px;font-weight:700;letter-spacing:.3px}
.brand-text small{font-size:12px;color:var(--t-3);letter-spacing:1px}
.nav{margin-top:22px;display:flex;flex-direction:column;gap:6px;flex:1;overflow-y:auto}
.nav-title{font-size:12px;color:var(--t-3);letter-spacing:1.5px;padding:0 10px 10px}
.nav a{
  position:relative;display:flex;align-items:center;gap:12px;
  min-height:44px;padding:10px 12px;border-radius:12px;
  color:var(--t-2);font-size:14.5px;line-height:1.4;
}
.nav a svg{width:18px;height:18px;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;flex:0 0 18px;opacity:.9}
.nav a::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:3px;height:0;border-radius:0 3px 3px 0;background:var(--glow);
  transition:height .22s ease;box-shadow:0 0 12px rgba(79,224,232,.6);
}
.nav a:hover,.nav a:focus-visible{background:var(--glass);color:var(--t-1)}
.nav a:hover::before,.nav a:focus-visible::before{height:22px}
.nav a.active{background:var(--glass);color:var(--t-1);font-weight:600}
.nav a.active::before{height:26px}
.nav a.active svg{color:var(--glow)}
.side-foot{border-top:1px solid var(--line);padding-top:18px;display:flex;flex-direction:column;gap:10px}
.side-foot .phone{font-size:15px;font-weight:700;letter-spacing:.5px;color:var(--t-1)}
.side-foot .side-note{font-size:12px;color:var(--t-3)}
.btn-ghost-side{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:42px;border-radius:var(--r-pill);
  border:1px solid rgba(140,205,255,.35);color:#CFE2F5;font-size:13.5px;
}
.btn-ghost-side:hover{background:var(--glass);border-color:var(--line-strong);color:#fff}

/* ---------- topbar (mobile) ---------- */
.topbar{
  display:none;position:sticky;top:0;z-index:70;
  height:64px;padding:0 20px;align-items:center;justify-content:space-between;
  background:rgba(8,17,30,.94);border-bottom:1px solid var(--line);
  backdrop-filter:blur(14px);
}
.topbar-logo{display:flex;align-items:center;gap:10px;font-size:15px;font-weight:700}
.topbar-logo .brand-mark{width:34px;height:34px;flex:0 0 34px;border-radius:10px;font-size:13px}
.burger{
  width:44px;height:44px;border-radius:12px;border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;background:var(--glass);
}
.burger svg{width:20px;height:20px;stroke:var(--t-1);fill:none;stroke-width:1.8;stroke-linecap:round}

/* ---------- drawer ---------- */
.mask{position:fixed;inset:0;background:rgba(3,10,20,.62);opacity:0;visibility:hidden;transition:opacity .26s ease,visibility .26s ease;z-index:80}
.mask.show{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;height:100%;width:280px;z-index:90;
  background:rgba(10,21,38,.98);border-left:1px solid var(--line);
  padding:20px 16px;display:flex;flex-direction:column;gap:8px;
  transform:translateX(100%);transition:transform .28s ease;
}
.drawer.show{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding:4px 6px 16px;border-bottom:1px solid var(--line);margin-bottom:12px}
.drawer-head strong{font-size:14px;color:var(--t-2);letter-spacing:1px;font-weight:600}
.drawer-close{width:40px;height:40px;border-radius:10px;border:1px solid var(--line);display:flex;align-items:center;justify-content:center}
.drawer-close svg{width:18px;height:18px;stroke:var(--t-1);fill:none;stroke-width:1.8;stroke-linecap:round}
.drawer a{
  position:relative;display:flex;align-items:center;gap:12px;min-height:48px;
  padding:10px 12px;border-radius:12px;color:var(--t-2);font-size:15px;
}
.drawer a svg{width:18px;height:18px;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.drawer a.active{background:var(--glass);color:var(--t-1);font-weight:600}
.drawer a.active::before{content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);width:3px;height:24px;border-radius:0 3px 3px 0;background:var(--glow)}

/* ---------- banner ---------- */
.banner{
  position:relative;min-height:300px;display:flex;align-items:flex-end;
  background-image:linear-gradient(100deg,rgba(4,10,20,.94) 12%,rgba(6,14,26,.72) 55%,rgba(6,14,26,.55) 100%),url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.banner::after{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(120,190,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(120,190,255,.05) 1px,transparent 1px);
  background-size:64px 64px;pointer-events:none;
}
.banner-inner{position:relative;z-index:2;padding:56px 0 40px;width:100%}
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--t-3);margin-bottom:18px;flex-wrap:wrap}
.crumb a{color:var(--t-3)}
.crumb a:hover{color:var(--glow)}
.crumb .sep{opacity:.5}
.crumb .cur{color:var(--t-2)}
.banner h1{font-size:44px;line-height:1.2;font-weight:800;letter-spacing:.4px;max-width:900px}
.banner h1 em{font-style:normal;color:var(--glow)}
.banner-lead{margin-top:18px;font-size:18px;line-height:1.8;color:var(--t-2);max-width:760px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
.tag{
  display:inline-flex;align-items:center;gap:8px;height:28px;padding:0 14px;
  border-radius:var(--r-pill);font-size:12.5px;letter-spacing:.4px;
  background:var(--glass);border:1px solid var(--line);color:#CFE2F5;
}
.tag.accent{background:var(--accent);border-color:transparent;color:#1A1206;font-weight:700}
.tag svg{width:13px;height:13px;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  height:48px;padding:0 28px;border-radius:var(--r-pill);
  font-size:15px;font-weight:700;letter-spacing:.3px;
  transition:transform .22s ease,box-shadow .22s ease,background-color .22s ease,border-color .22s ease;
}
.btn svg{width:17px;height:17px;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.btn-primary{
  background:linear-gradient(120deg,#2A7BE4,#4FE0E8);color:#06121F;
  box-shadow:var(--sh-glow);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 0 1px rgba(79,224,232,.5),0 12px 34px rgba(79,224,232,.34);color:#06121F}
.btn-primary:active{transform:translateY(1px)}
.btn-secondary{
  background:transparent;border:1px solid rgba(140,205,255,.35);color:#CFE2F5;
}
.btn-secondary:hover{background:var(--glass);border-color:var(--line-strong);color:#fff;transform:translateY(-2px)}
.btn-secondary:active{transform:translateY(1px)}
.btn:focus-visible,.arrow-link:focus-visible,a:focus-visible,button:focus-visible{
  outline:2px solid var(--glow);outline-offset:2px;border-radius:var(--r-pill);
}
.btn[disabled],.btn.is-disabled{opacity:.45;pointer-events:none;box-shadow:none;transform:none}

/* ---------- service cards (asymmetric) ---------- */
.svc-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:24px}
.svc-card{
  background:var(--bg-2);border:1px solid var(--line);border-radius:var(--r-card);
  padding:28px;box-shadow:var(--sh-1);
  display:flex;flex-direction:column;gap:14px;
  transition:transform .3s ease,border-color .3s ease,box-shadow .3s ease;
}
.svc-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--sh-2)}
.svc-card--lead{grid-column:span 6;flex-direction:row;gap:26px;align-items:center;padding:0;overflow:hidden}
.svc-card--lead .lead-media{flex:0 0 46%;min-height:100%;align-self:stretch}
.svc-card--lead .lead-media img{width:100%;height:100%;object-fit:cover;border-radius:0}
.svc-card--lead .lead-body{padding:30px 30px 30px 0;display:flex;flex-direction:column;gap:14px}
.svc-card--side{grid-column:span 3}
.svc-ico{
  width:46px;height:46px;border-radius:14px;display:flex;align-items:center;justify-content:center;
  background:rgba(79,224,232,.10);border:1px solid var(--line-strong);
}
.svc-ico svg{width:22px;height:22px;stroke:var(--glow);fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.svc-card h3{font-size:20px;line-height:1.45;font-weight:700}
.svc-card p{font-size:14.5px;color:var(--t-2);line-height:1.8}
.svc-list{display:flex;flex-direction:column;gap:8px;margin-top:2px}
.svc-list li{position:relative;padding-left:18px;font-size:14px;color:var(--t-2)}
.svc-list li::before{content:"";position:absolute;left:0;top:10px;width:6px;height:6px;border-radius:2px;background:var(--glow);opacity:.85}
.svc-meta{display:flex;align-items:center;gap:10px;margin-top:auto;padding-top:14px;border-top:1px solid var(--line);font-size:13px;color:var(--t-3)}
.svc-meta strong{color:var(--accent);font-size:15px;font-weight:700}

/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;counter-reset:step}
.step{
  position:relative;background:var(--bg-2);border:1px solid var(--line);border-radius:var(--r-card);
  padding:30px 24px 26px;box-shadow:var(--sh-1);
  transition:transform .3s ease,border-color .3s ease,box-shadow .3s ease;
}
.step:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--sh-2)}
.step-num{
  font-size:52px;line-height:1;font-weight:800;color:var(--accent);
  font-variant-numeric:tabular-nums;letter-spacing:-1px;opacity:.95;
}
.step-line{height:2px;width:36px;background:linear-gradient(90deg,var(--accent),rgba(245,165,36,0));margin:16px 0 18px;border-radius:2px}
.step h3{font-size:19px;font-weight:700;margin-bottom:10px}
.step p{font-size:14.5px;color:var(--t-2)}
.step-tip{margin-top:14px;font-size:12.5px;color:var(--t-3);border-top:1px dashed var(--line);padding-top:12px}

/* ---------- table ---------- */
.table-wrap{background:var(--bg-2);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1)}
table{width:100%;border-collapse:collapse;font-variant-numeric:tabular-nums}
caption{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
thead th{
  background:var(--bg-1);text-align:left;padding:18px 22px;font-size:13.5px;
  color:var(--t-2);font-weight:600;letter-spacing:.6px;border-bottom:1px solid var(--line);
}
tbody td{padding:18px 22px;font-size:14.5px;color:var(--t-2);border-bottom:1px solid var(--line)}
tbody tr:last-child td{border-bottom:none}
tbody tr:hover td{background:var(--glass);color:var(--t-1)}
tbody td:first-child{color:var(--t-1);font-weight:600}
.td-strong{color:var(--accent);font-weight:700}

/* ---------- split feature ---------- */
.split{display:grid;grid-template-columns:5fr 6fr;gap:48px;align-items:center}
.split-media{position:relative;border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);box-shadow:var(--sh-1)}
.split-media img{width:100%;aspect-ratio:16/11;object-fit:cover;transition:transform .5s ease}
.split-media:hover img{transform:scale(1.04)}
.split-media .media-badge{
  position:absolute;left:18px;bottom:18px;
  background:rgba(9,19,34,.78);border:1px solid var(--line-strong);
  backdrop-filter:blur(10px);border-radius:14px;padding:12px 16px;font-size:13px;color:#CFE2F5;
}
.split-body h2{font-size:32px;line-height:1.3;font-weight:700;margin-bottom:16px}
.split-body p{color:var(--t-2);font-size:15.5px;margin-bottom:14px}
.fact-list{margin-top:8px;border-top:1px solid var(--line)}
.fact-list li{display:flex;justify-content:space-between;gap:20px;padding:14px 0;border-bottom:1px solid var(--line);font-size:14.5px}
.fact-list li span:first-child{color:var(--t-2)}
.fact-list li span:last-child{color:var(--t-1);font-weight:600;font-variant-numeric:tabular-nums}

/* ---------- faq ---------- */
.faq{background:var(--bg-2);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1)}
.faq-item{border-bottom:1px solid var(--line);position:relative}
.faq-item:last-child{border-bottom:none}
.faq-item::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--glow);
  transform:scaleY(0);transform-origin:top;transition:transform .22s ease;
}
.faq-item.open::before{transform:scaleY(1)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:22px 26px;text-align:left;font-size:17px;font-weight:600;color:var(--t-1);
  transition:background-color .22s ease,color .22s ease;
}
.faq-q:hover{background:var(--glass)}
.faq-sign{
  flex:0 0 26px;width:26px;height:26px;border-radius:50%;
  border:1px solid var(--line-strong);display:flex;align-items:center;justify-content:center;
  transition:transform .22s ease,background-color .22s ease;
}
.faq-sign svg{width:14px;height:14px;stroke:var(--glow);fill:none;stroke-width:2;stroke-linecap:round}
.faq-item.open .faq-sign{transform:rotate(45deg);background:rgba(79,224,232,.12)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .24s ease}
.faq-a-inner{padding:0 26px 24px 26px;font-size:15px;line-height:1.8;color:var(--t-2)}

/* ---------- cta band ---------- */
.cta-band{
  position:relative;border-radius:var(--r-card);overflow:hidden;
  background:rgba(255,255,255,.06);
  border:1px solid var(--line-strong);
  backdrop-filter:blur(14px);
  padding:48px 44px;display:flex;align-items:center;justify-content:space-between;gap:36px;
  box-shadow:var(--sh-2);
}
.cta-band::after{
  content:"";position:absolute;right:-120px;top:-120px;width:340px;height:340px;border-radius:50%;
  background:radial-gradient(circle,rgba(79,224,232,.22),transparent 68%);pointer-events:none;
}
.cta-left{position:relative;z-index:2;max-width:640px}
.cta-left h2{font-size:32px;line-height:1.3;font-weight:700;margin-bottom:12px}
.cta-left p{color:var(--t-2);font-size:15.5px}
.cta-right{position:relative;z-index:2;display:flex;gap:14px;flex-wrap:wrap}

/* ---------- footer ---------- */
.site-footer{background:var(--bg-1);border-top:1px solid var(--line);position:relative;margin-top:20px}
.site-footer::before{
  content:"";position:absolute;top:-1px;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(79,224,232,.55),transparent);
}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:42px;padding:64px 0 44px}
.foot-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.foot-brand strong{font-size:16px;letter-spacing:.3px}
.foot-desc{color:var(--t-2);font-size:14px;line-height:1.85;max-width:340px}
.foot-col h4{font-size:14px;font-weight:700;letter-spacing:.6px;margin-bottom:16px;color:var(--t-1)}
.foot-col ul{display:flex;flex-direction:column;gap:10px}
.foot-col a{font-size:14px;color:var(--t-2);border-bottom:1px solid transparent;padding-bottom:1px}
.foot-col a:hover{color:var(--glow);border-bottom-color:var(--line-strong)}
.foot-col p{font-size:14px;color:var(--t-2);margin-bottom:8px;line-height:1.75}
.foot-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  border-top:1px solid var(--line);padding:20px 0 26px;font-size:13px;color:var(--t-3);
}
.foot-bottom .domain{font-variant-numeric:tabular-nums;letter-spacing:.6px}

/* ---------- responsive ---------- */
@media (max-width:1439px){
  .banner h1{font-size:40px}
}
@media (max-width:1279px){
  :root{--sidebar-w:216px}
  .container{padding:0 28px}
  .svc-card--lead{grid-column:span 12;flex-direction:row}
  .svc-card--side{grid-column:span 4}
  .steps{grid-template-columns:repeat(2,1fr)}
  .split{gap:36px}
}
@media (max-width:1023px){
  .sidebar{display:none}
  .topbar{display:flex}
  .main-wrap{margin-left:0;width:100%}
  .container{padding:0 24px}
  .section{padding:64px 0}
  .banner{min-height:260px}
  .banner-inner{padding:44px 0 32px}
  .banner h1{font-size:34px}
  .banner-lead{font-size:16.5px}
  .sec-head{flex-direction:column;align-items:flex-start;gap:14px}
  .sec-head h2{font-size:26px}
  .split{grid-template-columns:1fr}
  .split-body h2,.cta-left h2{font-size:26px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px;padding:48px 0 32px}
  .cta-band{flex-direction:column;align-items:flex-start;padding:36px 28px}
}
@media (max-width:767px){
  .container{padding:0 20px}
  .section{padding:52px 0}
  .banner{min-height:220px}
  .banner h1{font-size:30px}
  .banner-lead{font-size:15.5px;line-height:1.75}
  .hero-tags{gap:8px}
  .svc-card--lead{grid-column:span 12;flex-direction:column}
  .svc-card--lead .lead-media{flex:none;width:100%}
  .svc-card--lead .lead-media img{aspect-ratio:16/9;height:auto}
  .svc-card--lead .lead-body{padding:24px}
  .svc-card--side{grid-column:span 12}
  .steps{grid-template-columns:1fr;gap:18px}
  .step-num{font-size:44px}
  .table-wrap{overflow-x:auto}
  table{min-width:640px}
  .btn{width:100%;height:44px}
  .cta-right{width:100%;flex-direction:column}
  .foot-grid{grid-template-columns:1fr;gap:28px}
  .foot-bottom{flex-direction:column;align-items:flex-start;gap:8px}
}
@media (max-width:479px){
  .banner h1{font-size:26px}
  .sec-head h2,.split-body h2,.cta-left h2{font-size:22px}
  .svc-card,.step{padding:22px 18px}
  .faq-q{padding:18px 18px;font-size:15.5px}
  .faq-a-inner{padding:0 18px 20px}
  .cta-band{padding:28px 20px}
  .tag{font-size:11.5px;padding:0 11px}
}